EP0025378A1 - Oyster tongs - Google Patents

Oyster tongs Download PDF

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Publication number
EP0025378A1
EP0025378A1 EP80401200A EP80401200A EP0025378A1 EP 0025378 A1 EP0025378 A1 EP 0025378A1 EP 80401200 A EP80401200 A EP 80401200A EP 80401200 A EP80401200 A EP 80401200A EP 0025378 A1 EP0025378 A1 EP 0025378A1
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EP
European Patent Office
Prior art keywords
stop
axis
handle
knife
pliers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP80401200A
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German (de)
French (fr)
Inventor
Daniel Edouard Laventure
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Priority claimed from FR7921619A external-priority patent/FR2463601A1/en
Priority claimed from FR8014174A external-priority patent/FR2484813A2/en
Application filed by Individual filed Critical Individual
Publication of EP0025378A1 publication Critical patent/EP0025378A1/en
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47G—HOUSEHOLD OR TABLE EQUIPMENT
    • A47G21/00—Table-ware
    • A47G21/06—Combined or separable sets of table-service utensils; Oyster knives with openers; Fish servers with means for removing bones
    • A47G21/061—Oyster knives with openers; Shellfish openers
    • A47G21/062—Oyster splitters working by forcing a knife or the like between shells
    • A47G21/065—Hand tools, e.g. shucking knives

Definitions

  • the present invention relates to tongs for opening oysters and, in particular, tongs for opening oysters quickly, with one hand and without danger.
  • a relatively widespread device which consists of a wooden tablet having a hollow in which the oyster to be opened is placed, and a lever that can rotate around an axis integral with the tablet, the lever being provided with 'a handle and a knife point.
  • the knife point rigidly linked to the lever is applied against the hinge or another intermediate point between the two oyster valves and the force exerted on the handle at the end of the lever forces the point between the valves.
  • An object of the present invention is to provide an oyster clamp with adjustment possibilities, making it possible to carry out the opening operation, proper, of the oyster with one hand, allowing the opening of oysters hollow as well as flat oysters, and above all usable under excellent safety conditions.
  • an oyster clamp comprising a handle carrying a knife point and a stop holding the part of the oyster opposite to the knife point, the handle rotating around an axis mounted on a base plate, the axis being rotated by the closure of the arms of the pliers, in which the knife tip can freely pivot around the longitudinal axis of its handle.
  • the stop is mounted on the base plate via a section axis formed by two cylindrical parts connected by flats, in order to be able to move it in a slot formed by circular holes connected by more spaces narrow, forming a sort of rack.
  • the axis carrying the handle is driven by a gear train itself driven by the rotation of a branch of the clamp.
  • the pivoting of the knife point on its handle is limited by two stops.
  • the base of the knife tip is extended longitudinally to form the round end of a knife blade.
  • an oyster clamp in which the gear train is replaced by transmission means which comprise a first arm, integral with the movable branch and carrying a lug which is engaged in a groove of a second arm, integral with the handle, the lug rotating with the movable branch and, via the edges of the groove, driving the handle in rotation.
  • the pivoting of the knife point on its handle is limited by the ends of the slot.
  • the dihedral stop has a relatively narrow U-shaped bottom.
  • the internal faces of the stop are coated with a layer of flexible material.
  • the plate comprises a rib, parallel to the rack and the base of the stop has, on the side of the rib, two dents which, in association with the rib, limit the free rotation of the stop, in both direction, one of the dents passing by force on the rib in the event of adjustment of the position of the stop.
  • the oyster clamp of FIG. 1 comprises a body 1 formed by an L-shaped plate, the end of the foot of which is secured to a handle branch 2.
  • Another handle branch 3 is articulated around an axis 4 passing through the plate 1, substantially in the middle of the base of the L.
  • the branches 2 and 3 have classic shapes which are found in the branches of universal pliers or pruning shears and can be grasped with one hand, for example the right hand, the branch 2 s' then applying in the palm of the hand while the branch 3 is clamped by the fingers.
  • the part of the plate 1 corresponding to the leg of the L has an elongated slot 5, in the direction of the jamb.
  • the slot 5 is formed by circular holes 6 joined by spaces 7, the distance between edges of which is a little less than the diameter of the holes 6.
  • Slots of this kind are known in so-called "multiple grip" pliers, in which they are provided on a branch of the clamp while the other clamp is provided with an axis passing through the slot and having a cross section formed by two arcs of circles joined at their ends by two cords, the distance between the cords allowing to pass between the right spaces of the slot.
  • In the slot 5 is slid an axis 8 integral with a stop 9.
  • the leg of the L of the plate 1 and the stop 9 are handled like the branches of a gripper with multiple grip, the flats of the axis 8 making it possible to slide it into the slot 5 to position the stopper at a suitable distance from the foot of the L.
  • a part 10 of the axis 8 is shown, in an exploded position, in FIG. 1, this part 10 comprising a head 11 and a body with cylindrical surfaces 12 and flats 13.
  • the stop 9 is formed by a folded plate to form a dihedral part opening towards the base of the L.
  • the end of the stop facing the L is split in alignment with the edge of the dihedral and has its sides folded down on the L and each pierced with a hole for the passage of the body of the axis 8.
  • the part 10 of the axis 8 is threaded into the holes of the stop and a hole 6 and, on the side opposite to 11, is welded to a disc 14.
  • a spring 15 formed of a turn (or possibly several) terminated by two strands 16 and 17, the strand 16 having an end curved 18 which hooks to the edge of the L opposite to the stop and the strand 17 having a curved end 19 hooking the underside of one of the faces of the dihedron of the stop 9, so as to keep the angle between the interior open of the stopper and the L.
  • the axis 4 has one of its ends secured to the branch 3, which does not overlap the plate 1, and its other end secured to a toothed pinion 20.
  • the pinion 20 meshes with a pinion 21 secured to an axis 22, which crosses the plate 1.
  • the axis 22 is integral with an arm 23 which ends, at its free end, by a socket 24.
  • the pivot 25 is slid from a pivoting handle carrying a knife point 26 directed towards the hollow of the stop 9.
  • the pin 22 is placed on the plate 1 so that, when the handle 3 is brought closer to the handle 2, the point 26 approaches the stop 9.
  • the diameter of the pinion 21 is chosen to be greater than that of the pinion 21 and the distance between the tip 26 and the axis 22 is chosen to be short enough to obtain a multiplication coefficient of 1.5 or 2 between the force applied. to handle 3 by the fingers and the force exerted by the tip on the oyster.
  • the handle carried by the pivot 25 is extended beyond the tip 26 and has the shape of a knife with a rounded tip, the wire 27 of which extends over the tip and the back of the handle relative to the tip 26.
  • the other end of the pivot 25, relative to the tip 26, ends in the form of a small dihedron 28, which limits the rotation of the pivot 25 between two angular positions forming between them an angle equal to the dihedron 28.
  • the faces of the dihedral serve as a stop when they come into contact with the flat surface 29 of the handle linked to the axis 22.
  • Fig. 1 there is shown in exploded view, on the one hand, the two pinions 20 and 21, and, on the other hand, the two axes 22 and 4.
  • the clamp is further supplemented by a spring 30 which, at rest, maintains branches 2 and 3 apart.
  • the bottom 34 of the slot 35 provided in the plate of the stop 9, so that it can be installed astride the edge of the L of the plate 1, can be reinforced, for the reasons that will be seen below. .
  • the double arrow F1 indicates the movements that the tip 26 can execute around the axis 22
  • the arrow F2 indicates the movement that must be given to the stop 9 around its axis 8, before adjusting its position in the slot 5
  • the double arrow F3 indicates the movements which axis 8 can execute in slot 5.
  • the gears 20 and 21 are shown in particular, which are toothed only on arcs corresponding to the arc which the branch 3 can describe. Furthermore, as indicated, the teeth of these pinions can be very basic. In Fig.
  • the branch 3 has, in the zone where it is grasped by the fingers, a thickness of the order of 1 cm, and that in its zone of connection with the plate 1, it is flat and fixed d 'only one side of it.
  • the double arrow F4 indicates the movements that the tip 26 can execute around the pivot 25.
  • FIG. 2 in dashed lines, an oyster 31 with its hinge 32 in contact with the tip 26 and its opposite part 33 in contact with the bottom of the stop 9.
  • the handle carrying the knife tip 26 is pivotally mounted between two limits is very important because it allows the oyster hinge to be freely pricked, then the tip 26 can rotate freely when the oyster in the stop.
  • the plane of the tip can form a significant angle with the general plane of the device.
  • the opening is however assured because the force exerted on the branches 2 and 3 is multiplied by the pinions and the lever arm ratios.
  • the components of the tongs are provided that are sufficiently robust given the forces involved.
  • the length of the slot 5, that is to say also of the leg of L, must be large enough to be able to open the largest oysters on the market.
  • the oyster clamp of FIG. 5 corresponds to a variant of that of FIGS. 1 to 4. It also comprises a body 36 formed of an L-shaped plate, the end of the foot of which is integral with a handle branch 37. Another handle branch 38 is articulated around an axis 39 passing through the plate 36, substantially in the middle of the base of the L.
  • the branches 37 and 38 are completely similar to the branches 1 and 2 of FIG. 1.
  • the part of the plate 36 corresponding to the jamb of the L has an elongated slot 40, in the direction of the jamb.
  • the slot 40 is on a rectilinear side and on the other side formed by semi-circular holes 41 joined by rectilinear segments 42.
  • the distance between the segments 42 and the rectilinear side is a little less than the distance between the edges semicircles 41 and the rectilinear side.
  • Slots of this kind are known in pliers of the multiple socket type, in which they are provided on one branch of the clamp while the other branch is provided with an axis passing through the slot and having a cross section formed by '' a large circular arc whose ends are joined by a cord, the distance between the cord and the bottom of the arc allowing to pass between the straight spaces of the slot.
  • In the slot 40 is slid such an axis 43 integral with a stop 44.
  • the leg of the L of the plate 36 and the stop 44 are also handled like the branches of a pliers with multiple grips, the flat part of the axis 43 allowing it to slide into the slot 40 to position the stopper at a suitable distance from the foot of the L.
  • the leg of the L also has a longitudinal rib in relief 45, parallel to the right edge of the slot 40.
  • the base of the stop 44 has, near the axis 43, two embossments, 46 and 47, turned towards 36.
  • the dent 46 is placed, above the axis 43, on the other side of 45 with respect to 43 and abuts on 45 in the rest position thus maintaining the angle between the stop and the L, despite the weight of the stop.
  • the dent 47 is placed below the axis 43, on the same side of 45 as 43. The dent 47 is at rest separated from the groove 45.
  • the stop 44 is formed by a plate folded to form a dihedral part opening towards the base of the L.
  • the dent 47 serves as a guide along 45 when rocking 44 around the axis 43 to give a good orientation to said axis 43 relative to the rack 40 in order to position the stop.
  • the dent 46 passes over 45 by elastic deformation of the metal of the stop 44.
  • the stop 44, moving away from the plate 36 takes the form of an inverted V, the bottom of the V being extended by a U turned whose height is approximately equal to the height of the dihedral and whose width is approximately one third of the largest width of the dihedral.
  • the branch 38 has the general shape of "7", the leg of "7” forming one of the handles of the clamp. It rotates around the axis 39 integral with the plate 36, the axis 39 being located, on the handle 38, at the top of the "7".
  • the end of the head of the "7” has an axis 48 engaged in a slot 49 of an arm 50, articulated around the axis 51, which ends, at its free end, by a socket 52.
  • the pivot 53 is slid from a pivoting handle carrying a knife tip 54 directed towards the hollow of the stop 44.
  • the axis 51 is placed, on the plate 36, so that, when the handle 38 is brought closer to the handle 37, the tip 54 approaches the stop 44.
  • the distance between the tip 54 and the axis 51 is chosen to be short enough to obtain a multiplication coefficient of 5 or 6 between the force applied to the handle 38 by the fingers and the force exerted by the tip on the oyster.
  • the pivot 53 is extended beyond the tip 54 and has the shape of a knife with a rounded tip, the wire 55 of which extends over the tip and the back of the handle relative to the tip 54.
  • the faces of the dihedral serve as a stop when they come into contact with the flat surface 57 of the handle linked to the axis 51.
  • the clamp is further supplemented by a spring 58 which, at rest, keeps the arms 37 and 38 apart.
  • the branch 37 and the plate 36 can, of course, be one piece, thus simplifying the construction of the clamp.
  • the bottom 59 of the slot 60 provided in the plate of the stop 44, so that it can be installed astride the edge of the L of the plate 36, can be reinforced, for the reasons that will be seen below. .
  • the double arrow F5 indicates the movements that the point 54 can execute around the axis 51
  • the arrow F6 indicates the movement which must be given to the stop 44 around its axis 43, before adjusting its position in the slot 40
  • the double arrow F7 indicates the movements which the axis 43 can execute in the slot 40.
  • the oblong hole 49 limits the movement of the branch 38 which describes an arc of a circle corresponding to the arc described by the axis 48, thereby pivoting the tip 54 upward, and abutting on the end furthest from the axis 51 in the open position, and on the end closest to the axis 51 in the closed position.
  • the branch 38 has, in the zone where it is grasped by the fingers, a thickness of the order of 1 cm, and, in its zone of connection with the plate 36, it is flat and fixed on only one side of that -this.
  • FIG. 5 in dashed lines, an oyster 61 with its hinge 62 in contact with the tip 54 and its opposite part 63 in contact with the bottom of the stop 44, or simply pinched between the branches of the U of the bottom of the stop 44.
  • the bottom of the U-shaped section of the stop 44 has the effect of preventing the edge of the oyster, opposite the hinge, from being subjected to too great a force and from breaking. Indeed, this edge sinks, like a corner, into the U-shaped section, but does not reach the bottom. The efforts are then transmitted to the oyster shell in an area where it is not likely to break.
  • the width of the U is of the order of a few millimeters.

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Abstract

The tongs for opening oysters comprise a holder (25), which carries a knife point (26), and a stop (9) which holds the portion of the oyster which is opposite the knife point (26). The holder (25) rotates about a shaft (22) which is rotated by closing the branches (2, 3) of the tongs. The point of the knife (26) can pivot freely in a sleeve (24) integral with the shaft (22). The stop (9) is mounted on a base plate (1), which already holds the shaft (22), by means of an another shaft (8) which can be displaced in a notch slot (5). The shaft (22) can be driven by a first pinion engaging a second pinion mounted on a third shaft (4) driven by the branch (3). The pivoting of the point of the knife (26) on its holder (25) is limited by two stops (28). In an alternative embodiment, the series of pinions is replaced by transmission means which comprise a first arm integral with the movable branch and carrying a stud which is engaged in a groove of a second arm integral with the sleeve carrying the knife point. The stud turns with the movable branch and, by means of the edges of the groove, drives the knife holder in rotation. Likewise, as an alternative embodiment, the dihedral stop can have a base with U-shaped section which is relatively narrow. <IMAGE>

Description

La présente invention concerne une pince pour ouvrir les huîtres et, notamment, une pince permettant d'ouvrir les huîtres rapidement, d'une seule main et sans danger.The present invention relates to tongs for opening oysters and, in particular, tongs for opening oysters quickly, with one hand and without danger.

On sait qu'un obstacle important à la commercialisation des huîtres, notamment dans les régions éloignées des côtes, résulte de la difficulté à ouvrir les huîtres. En dehors des couteaux classiques, on a cherché depuis longtemps à développer des outils pour faciliter cette opération. On connaît un appareil, relativement répandu, qui se compose d'une tablette de bois comportant un creux dans lequel on pose l'huître à ouvrir, et un levier pouvant tourner autour d'un axe solidaire de la tablette, le levier étant muni d'une poignée et d'une pointe de couteau. La pointe de couteau rigidement liée au levier est appliquée contre la charnière ou un autre point intermédiaire entre les deux valves de l'huître et l'effort exercé sur la poignée au bout du levier force la pointe entre les valves. Cet appareil est efficace quand il est utilisé par des écaillers professionnels, mais il demeure d'une utilisation difficile pour la majorité. Par ailleurs, il nécessite l'utilisation des deux mains, l'une pour appliquer fermement l'huître dans le creux de la planchette, l'autre pour pousser le levier. Enfin, il s'agit d'un appareil de grande dimension difficile à ranger dans une cuisine domestique.On trouvera la description d'un appareil de ce genre dans le brevet français 1 348 711.We know that a major obstacle to the marketing of oysters, especially in regions far from the coast, results from the difficulty in opening oysters. Apart from conventional knives, we have long sought to develop tools to facilitate this operation. A relatively widespread device is known, which consists of a wooden tablet having a hollow in which the oyster to be opened is placed, and a lever that can rotate around an axis integral with the tablet, the lever being provided with 'a handle and a knife point. The knife point rigidly linked to the lever is applied against the hinge or another intermediate point between the two oyster valves and the force exerted on the handle at the end of the lever forces the point between the valves. This device is effective when used by professional scalers, but it remains difficult to use for the majority. Furthermore, it requires the use of two hands, one to firmly apply the oyster in the hollow of the board, the other to push the lever. Finally, it is a large device that is difficult to store in a domestic kitchen. A description of such a device can be found in French patent 1 348 711.

Des appareils en forme de pinces à huîtres sont également décrits dans les brevets français 1 225 218, 1 297 140 et 1 579 646. Dans le brevet 1 225 219, la pointe de couteau est liée rigidement à la branche sur laquelle il est monté, et la butée servant à maintenir la partie de l'huître opposée au couteau n'offre aucune possibilité de réglage rapide et n'est pas enveloppante, si bien qu'il faut pratiquement utiliser les deux mains. Dans le brevet français 1 297 140, on retrouve des moyens analogues. Dans le brevet 1 579 646, il est prévu une butée enveloppante, non réglable, mais la pointe de couteau est toujours rigidement liée à sa branche. Par ailleurs, il faut utiliser les deux mains pour refermer l'appareil, si bien que l'utilisateur ne travaille pas dans de bonnes conditions.Apparatus in the form of oyster tongs are also described in French patents 1,225,218, 1,297,140 and 1,579,646. In patent 1,225,219, the knife tip is rigidly linked to the branch on which it is mounted, and the stop serving to hold the part of the oyster opposite the knife offers no possibility of rapid adjustment and is not enveloping, so that it is practically necessary to use both hands. In French patent 1,297,140, similar means are found. In patent 1,579,646, it an enveloping, non-adjustable stop is provided, but the knife point is always rigidly linked to its branch. In addition, you must use both hands to close the device, so that the user does not work in good conditions.

Un objet de la présente invention consiste à prévoir une pince à huîtres offrant des possibilités de réglage, permettant d'effectuer l'opération d'ouverture, proprement dite, de l'huître d'une seule main, permettant l'ouverture d'huîtres creuses aussi bien que d'huîtres plates, et surtout utilisable dans des conditions de sécurité excellente.An object of the present invention is to provide an oyster clamp with adjustment possibilities, making it possible to carry out the opening operation, proper, of the oyster with one hand, allowing the opening of oysters hollow as well as flat oysters, and above all usable under excellent safety conditions.

Suivant une caractéristique de l'invention, il est prévue une pince à huître comprenant un manche portant une pointe de couteau et une butée maintenant la partie de l'huître opposée à la pointe de couteau, le manche tournant autour d'un axe monté sur une plaque de base, l'axe étant mis en rotation par la fermeture des branches de la pince, dans laquelle la pointe de couteau peut librement pivoter autour de l'axe longitudinal de son manche.According to a characteristic of the invention, an oyster clamp is provided comprising a handle carrying a knife point and a stop holding the part of the oyster opposite to the knife point, the handle rotating around an axis mounted on a base plate, the axis being rotated by the closure of the arms of the pliers, in which the knife tip can freely pivot around the longitudinal axis of its handle.

Suivant une autre caractéristique, la butée est montée sur la plaque de base par l'intermédiaire d'une axe à section formée de deux parties cylindriques raccordées par des méplats, pour pouvoir la déplacer dans une fente formée de trous circulaires raccordés par des espaces plus étroits, formant une sorte de crémaillère.According to another characteristic, the stop is mounted on the base plate via a section axis formed by two cylindrical parts connected by flats, in order to be able to move it in a slot formed by circular holes connected by more spaces narrow, forming a sort of rack.

Suivant une autre caractéristique, l'axe portant le manche est entraîné par un train de pignons lui-même entraîné par la rotation d'une branche de la pince.According to another characteristic, the axis carrying the handle is driven by a gear train itself driven by the rotation of a branch of the clamp.

Suivant une autre caractéristique, le pivotement de la pointe de couteau sur son manche est limitée par deux butées.According to another characteristic, the pivoting of the knife point on its handle is limited by two stops.

Suivant une autre caractéristique, la base de la pointe de couteau est prolongée longitudinalement pour former le bout rond d'une lame de couteau.According to another characteristic, the base of the knife tip is extended longitudinally to form the round end of a knife blade.

Suivant une autre caractéristique, il est prévu une telle pince à huître, dans laquelle le train de pignons est remplacé par des moyens de transmission qui comprennent un premier bras, solidaire de la branche mobile et portant un ergot qui est engagé dans une rainure d'un second bras, solidaire du manche, l'ergot tournant avec la branche mobile et, par l'intermédiaire des bords de la rainure, entraînant le manche en rotation.According to another characteristic, there is provided such an oyster clamp, in which the gear train is replaced by transmission means which comprise a first arm, integral with the movable branch and carrying a lug which is engaged in a groove of a second arm, integral with the handle, the lug rotating with the movable branch and, via the edges of the groove, driving the handle in rotation.

Suivant une autre caractéristique, le pivotement de la pointe de couteau sur son manche est limité par les extrémités de la fente.According to another characteristic, the pivoting of the knife point on its handle is limited by the ends of the slot.

Suivant une autre caractéristique, la butée diédrique présente un fond à section en U relativement étroit.According to another characteristic, the dihedral stop has a relatively narrow U-shaped bottom.

Suivant une autre caractéristique, les faces internes de la butée sont revêtues d'une couche de matière souple.According to another characteristic, the internal faces of the stop are coated with a layer of flexible material.

Suivant une autre caractéristique, la plaque comporte une nervure, parallèle à la crémaillère et la base de la butée présente, du côté de la nervure, deux bosselures qui, en association avec la nervure, limitent la rotation libre de la butée, dans les deux sens, une des bosselures passant en force sur la nervure en cas de réglage de la position de la butée.According to another characteristic, the plate comprises a rib, parallel to the rack and the base of the stop has, on the side of the rib, two dents which, in association with the rib, limit the free rotation of the stop, in both direction, one of the dents passing by force on the rib in the event of adjustment of the position of the stop.

Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'exemples de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels:

  • la Fig. 1 est une vue schématique en perspective d'une pince à huître suivant l'invention,
  • la Fig. 2 est une vue d'une face de la pince montrée à la Fig. 1,
  • la Fig. 3 est une vue de l'autre face de la pince montrée à la Fig. 1,
  • la Fig. 4 est une vue de bout de la pince montrée à la Fig. 1,
  • la Fig. 5 est une vue de face d'une variante de la pince à huître de la Fig.l, et
  • la Fig. 6 est une vue de bout de la butée de la pince montrée à la Fig. 5.
The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of exemplary embodiments, said description being made in relation to the accompanying drawings, among which:
  • Fig. 1 is a schematic perspective view of an oyster clamp according to the invention,
  • Fig. 2 is a view of a face of the clamp shown in FIG. 1,
  • Fig. 3 is a view of the other side of the clamp shown in FIG. 1,
  • Fig. 4 is an end view of the clamp shown in FIG. 1,
  • Fig. 5 is a front view of a variant of the oyster tongs of FIG. 1, and
  • Fig. 6 is an end view of the stop of the clamp shown in FIG. 5.

La pince à huître de la Fig. 1 comprend un corps 1 formé d'une plaque en L, dont le bout du pied est solidaire d'une branche de poignée 2. Une autre branche de poignée 3 est articulée autour d'un axe 4 traversant la plaque 1, sensiblement au milieu de la base du L. Les branches 2 et 3 ont des formes classiques que l'on retrouve dans les branches de pince universelle ou de sécateur et peuvent être saisies d'une seule main, par exemple la main droite, la branche 2 s'appliquant alors dans le creux de la main tandis que la branche 3 est serrée par les doigts.The oyster clamp of FIG. 1 comprises a body 1 formed by an L-shaped plate, the end of the foot of which is secured to a handle branch 2. Another handle branch 3 is articulated around an axis 4 passing through the plate 1, substantially in the middle of the base of the L. The branches 2 and 3 have classic shapes which are found in the branches of universal pliers or pruning shears and can be grasped with one hand, for example the right hand, the branch 2 s' then applying in the palm of the hand while the branch 3 is clamped by the fingers.

La partie de la plaque 1 correspondant au jambage du L présente une fente allongée 5, dans le sens du jambage. La fente 5 est formée par des trous cirulaires 6 réunis par des espaces 7, dont la distance entre bords est un peu inférieure au diamètre des trous 6. Les fentes de ce genre sont connues dans les pinces dites "à prises multiples", dans lesquelles elles sont prévues sur une branche de la pince tandis que l'autre pince est munie d'un axe passant dans la fente est ayant une section transversale formée de deux arcs de cercles réunis à leurs extrémités par deux cordes, la distance entre les cordes permettant de passer entre les espaces droits de la fente. Dans la fente 5 est glissé un axe 8 solidaire d'une butée 9. Le jambage du L de la plaque 1 et la butée 9 se manipulent comme les branches d'une pince à prise multiples, les méplats de l'axe 8 permettant de le faire glisser dans la fente 5 pour positionner la butée à une distance convenable du pied du L. Une partie 10 de l'axe 8 est montrée, en position éclatée, à la Fig. 1, cette partie 10 comprenant une tête 11 et un corps avec des surfaces cylindriques 12 et des méplats 13.The part of the plate 1 corresponding to the leg of the L has an elongated slot 5, in the direction of the jamb. The slot 5 is formed by circular holes 6 joined by spaces 7, the distance between edges of which is a little less than the diameter of the holes 6. Slots of this kind are known in so-called "multiple grip" pliers, in which they are provided on a branch of the clamp while the other clamp is provided with an axis passing through the slot and having a cross section formed by two arcs of circles joined at their ends by two cords, the distance between the cords allowing to pass between the right spaces of the slot. In the slot 5 is slid an axis 8 integral with a stop 9. The leg of the L of the plate 1 and the stop 9 are handled like the branches of a gripper with multiple grip, the flats of the axis 8 making it possible to slide it into the slot 5 to position the stopper at a suitable distance from the foot of the L. A part 10 of the axis 8 is shown, in an exploded position, in FIG. 1, this part 10 comprising a head 11 and a body with cylindrical surfaces 12 and flats 13.

La butée 9 est formée par une plaque pliée pour former une partie dièdrique s'ouvrant vers la base du L. Le bout de la butée tournée vers le L, est fendu dans l'alignement de l'arête du dièdre et a ses faces rabattues sur le L et percées chacune d'un trou pour le passage du corps de l'axe 8. La partie 10 de l'axe 8 s'enfile dans les trous de la butée et un trou 6 et, du côté opposé à 11, est soudée à un disque 14. Toutefois entre le disque 14 et la face adjacente de la butée 9, est prévu un ressort 15 formé d'une spire (ou éventuellement plusieurs) terminé par deux brins 16 et 17, le brin 16 ayant un bout recourbé 18 qui s'accroche au bord du L opposé à la butée et le brin 17 ayant un bout recourbé 19 accrochant le dessous d'une des faces du dièdre de la butée 9, de manière à maintenir ouvert l'angle entre l'intérieur de la butée et le L.The stop 9 is formed by a folded plate to form a dihedral part opening towards the base of the L. The end of the stop facing the L, is split in alignment with the edge of the dihedral and has its sides folded down on the L and each pierced with a hole for the passage of the body of the axis 8. The part 10 of the axis 8 is threaded into the holes of the stop and a hole 6 and, on the side opposite to 11, is welded to a disc 14. However, between the disc 14 and the adjacent face of the stop 9, there is provided a spring 15 formed of a turn (or possibly several) terminated by two strands 16 and 17, the strand 16 having an end curved 18 which hooks to the edge of the L opposite to the stop and the strand 17 having a curved end 19 hooking the underside of one of the faces of the dihedron of the stop 9, so as to keep the angle between the interior open of the stopper and the L.

L'axe 4 a une de ses extrémités solidaire de la branche 3, qui ne chevauche pas la plaque 1, et son autre extrémité solidaire d'un pignon denté 20. Le pignon 20 engrène un pignon 21 solidaire d'un axe 22, qui traverse la plaque 1. De l'autre côté de la plaque 1, par rapport au pignon 21, l'axe 22 est solidaire d'un bras 23 qui se termine, à son extrémité libre, par une douille 24. A l'intérieur de la douille 24, est glissé le pivot 25 d'un manche pivotant portant une pointe de couteau 26 dirigée vers le creux de la butée 9. L'axe 22 est placé, sur la plaque 1, de manière que, quand le manche 3 est rapproché du manche 2, la pointe 26 se rapproche de la butée 9. Par ailleurs, le diamètre du pignon 21 est choisi plus grand que celui du pignon 21 et la distance entre la pointe 26 et l'axe 22 est choisie assez courte pour obtenir un coefficient de multiplication de 1,5 ou 2 entre l'effort appliqué au manche 3 par les doigts et la force exercée par la pointe sur l'huître. Enfin, le manche porté par le pivot 25 est prolongé au-delà de la pointe 26 et a la forme de couteau à bout arrondi dont le fil 27 s'étend sur le bout et le dos du manche par rapport à la pointe 26.The axis 4 has one of its ends secured to the branch 3, which does not overlap the plate 1, and its other end secured to a toothed pinion 20. The pinion 20 meshes with a pinion 21 secured to an axis 22, which crosses the plate 1. On the other side of the plate 1, with respect to the pinion 21, the axis 22 is integral with an arm 23 which ends, at its free end, by a socket 24. Inside of the sleeve 24, the pivot 25 is slid from a pivoting handle carrying a knife point 26 directed towards the hollow of the stop 9. The pin 22 is placed on the plate 1 so that, when the handle 3 is brought closer to the handle 2, the point 26 approaches the stop 9. Furthermore, the diameter of the pinion 21 is chosen to be greater than that of the pinion 21 and the distance between the tip 26 and the axis 22 is chosen to be short enough to obtain a multiplication coefficient of 1.5 or 2 between the force applied. to handle 3 by the fingers and the force exerted by the tip on the oyster. Finally, the handle carried by the pivot 25 is extended beyond the tip 26 and has the shape of a knife with a rounded tip, the wire 27 of which extends over the tip and the back of the handle relative to the tip 26.

L'autre extrémité du pivot 25, par rapport à la pointe 26, se termine en forme de petit dièdre 28, qui limite la rotation du pivot 25 entre deux positions angulaires faisant entre elles un angle égal au dièdre 28. En effet, les faces du dièdre servent de butée quand elles viennent en contact avec la surface plane 29 du manche lié à l'axe 22.The other end of the pivot 25, relative to the tip 26, ends in the form of a small dihedron 28, which limits the rotation of the pivot 25 between two angular positions forming between them an angle equal to the dihedron 28. In fact, the faces of the dihedral serve as a stop when they come into contact with the flat surface 29 of the handle linked to the axis 22.

A la Fig. 1, on a représenté en vue éclatée, d'une part, les deux pignons 20 et 21, et, d'autre part, les deux axes 22 et 4. La pince est encore complétée par un ressort 30 qui, au repos, maintient les branches 2 et 3 écartées.In Fig. 1, there is shown in exploded view, on the one hand, the two pinions 20 and 21, and, on the other hand, the two axes 22 and 4. The clamp is further supplemented by a spring 30 which, at rest, maintains branches 2 and 3 apart.

Le fond 34 de la fente 35 prévue dans la plaque de la butée 9, pour qu'elle puisse être installée à cheval sur le bord du L de la plaque 1, peut être renforcé, pour les raisons que l'on verra dans la suite.The bottom 34 of the slot 35 provided in the plate of the stop 9, so that it can be installed astride the edge of the L of the plate 1, can be reinforced, for the reasons that will be seen below. .

A la Fig. 2, la double flèche F1 indique les mouvements que la pointe 26 peut exécuter autour de l'axe 22, la flèche F2 indique le mouvement qu'il faut donner à la butée 9 autour de son axe 8, avant de régler sa position dans la fente 5, et la double flèche F3 indique les mouvements que peut exécuter l'axe 8 dans la fente 5. A la Fig. 3, on montre notamment les pignons 20 et 21, qui ne sont dentés que sur des arcs correspondant à l'arc que peut décrire la branche 3. Par ailleurs, comme il est indiqué, les dentures de ces pignons peuvent être très sommaires. A la Fig. 4, il apparaît clairement que la branche 3 a, dans la zone où elle est saisie par les doigts, une épaisseur de l'ordre de 1 cm, et que dans sa zone de raccordement avec la plaque 1, elle est plate et fixée d'un seul côté de celle-ci. Enfin, la double flèche F4 indique les mouvements que peut exécuter la pointe 26 autour du pivot 25.In Fig. 2, the double arrow F1 indicates the movements that the tip 26 can execute around the axis 22, the arrow F2 indicates the movement that must be given to the stop 9 around its axis 8, before adjusting its position in the slot 5, and the double arrow F3 indicates the movements which axis 8 can execute in slot 5. In FIG. 3, the gears 20 and 21 are shown in particular, which are toothed only on arcs corresponding to the arc which the branch 3 can describe. Furthermore, as indicated, the teeth of these pinions can be very basic. In Fig. 4, it clearly appears that the branch 3 has, in the zone where it is grasped by the fingers, a thickness of the order of 1 cm, and that in its zone of connection with the plate 1, it is flat and fixed d 'only one side of it. Finally, the double arrow F4 indicates the movements that the tip 26 can execute around the pivot 25.

Enfin, à titre d'illustration, on a fait figurer, à la Fig. 2, en traits tirets, une huître 31 avec sa charnière 32 en contact avec la pointe 26 et sa partie opposée 33 en contact avec le fond de la butée 9.Finally, by way of illustration, FIG. 2, in dashed lines, an oyster 31 with its hinge 32 in contact with the tip 26 and its opposite part 33 in contact with the bottom of the stop 9.

Dans cette position, il suffit de fermer les branches 2 et 3 d'une seule main pour que la pointe 26 ne pénètre dans la charnière 32, ce qui permet ensuite d'y introduire le fil 27 du couteau pour couper le muscle adducteur de l'huître, qui est alors "ouverte".In this position, it suffices to close the branches 2 and 3 with one hand so that the tip 26 does not penetrate into the hinge 32, which then makes it possible to introduce there the wire 27 of the knife to cut the adductor muscle of the oyster, which is then "open".

En pratique, on sait que les huîtres ont des formes plus ou moins compliquées, ce qui complique généralement beaucoup l'opération d'ouverture par des moyens traditionnels. En utilisant l'appareil suivant l'invention, il suffit, en supposant d'abord la butée 9 bien réglée pour la dimension de l'huître, de commencer par piquer légèrement la charnière de l'huître avec la pointe 26, puis de faire entre la partie opposée 33 dans le coin formée par la butée 9 jusqu'à l'y coincer légèrement, et enfin de fermer les branches 2 et 3, d'une seule main. L'autre main est uniquement utiliser pour guider l'huître pour la coincer dans la butée, puis une fois que la charnière 32 a sauté, pour la guider à nouveau sur le fil 27 du couteau.In practice, it is known that oysters have more or less complicated shapes, which generally greatly complicates the opening operation by traditional means. Using the apparatus according to the invention, it suffices, assuming first the stop 9 well adjusted for the size of the oyster, to start by slightly pricking the hinge of the oyster with the tip 26, then making between the opposite part 33 in the corner formed by the stop 9 until it is wedged there slightly, and finally to close the branches 2 and 3, with one hand. The other hand is only used to guide the oyster to wedge it in the stop, then once the hinge 32 has jumped, to guide it again on the wire 27 of the knife.

Quand on se rend compte qu'une huître n'a pas la dimension voulue pour être coincée entre le fond de 9 et la pointe 26, avant de mettre l'huître dans la position indiquée à la Fig. 2, on déplace avec l'autre main la butée 9 suivant les flèches F2 et F3 jusqu'à l'amener à la position désirée. Cette opération de réglage est rapide. A noter qu'en pratique, les huîtres étant calibrées et vendues par catégories de taille, le réglage de la butée 9 n'est pas souvent nécessaire.When you realize that an oyster does not have the size required to be wedged between the bottom of 9 and the tip 26, before putting the oyster in the position indicated in FIG. 2, the stop 9 is moved with the other hand according to the arrows F2 and F3 until it brings it to the desired position. This adjustment operation is quick. Note that in practice, oysters being calibrated and sold by size category, adjusting the stop 9 is not often necessary.

Il faut bien comprendre que le fait que le manche portant la pointe de couteau 26 soit monté pivotant entre deux limites est très important car il permet de piquer librement la charnière de l'huître, puis la pointe 26 peut touner librement quand on engage l'huître dans la butée. Le plan de la pointe peut former un angle non négligeable avec le plan général de l'appareil. L'ouverture est toutefois assurée car l'effort exercé sur les branches 2 et 3 est multipliée par les pignons et les rapports de bras de leviers. Bien évidemment, les pièces composant la pince sont prévues suffisamment robustes étant donné les forces mises en jeu. La longueur de la fente 5, c'est à dire aussi du jambage de L doit être suffisamment grande pour pouvoir ouvrir les plus grosses huîtres commercialisées. On comprend également que, tant que la charnière de l'huître n'a pas sauté, l'effort appliqué par la pointe de couteau sur l'huître est transmis à la butée 9, c'est dire au fond 34 de sa fente 35. C'est pourquoi, on peut renforcer celui-ci en repliant, derrière l'arête de 9, la partie enlevée pour obtenir la fente 35, ou de toute autre manière adéquate.It should be understood that the fact that the handle carrying the knife tip 26 is pivotally mounted between two limits is very important because it allows the oyster hinge to be freely pricked, then the tip 26 can rotate freely when the oyster in the stop. The plane of the tip can form a significant angle with the general plane of the device. The opening is however assured because the force exerted on the branches 2 and 3 is multiplied by the pinions and the lever arm ratios. Obviously, the components of the tongs are provided that are sufficiently robust given the forces involved. The length of the slot 5, that is to say also of the leg of L, must be large enough to be able to open the largest oysters on the market. It is also understood that, as long as the hinge of the oyster has not jumped, the force applied by the knife point on the oyster is transmitted to the stop 9, that is to say at the bottom 34 of its slot 35 This is why, it can be reinforced by folding, behind the edge of 9, the part removed to obtain the slot 35, or in any other suitable manner.

La pince à huître de la Fig. 5 correspond à une variante de celle des Figs. 1 à 4. Elle comprend également un corps 36 formé d'une plaque en L, dont le bout du pied est solidaire d'une branche de poignée 37. Une autre branche de poignée 38 est articulée autour d'un axe 39 traversant la plaque 36, sensiblement au milieu de la base du L. Les branches 37 et 38 sont tout à fait analogues aux branches 1 et 2 de la Fig. 1.The oyster clamp of FIG. 5 corresponds to a variant of that of FIGS. 1 to 4. It also comprises a body 36 formed of an L-shaped plate, the end of the foot of which is integral with a handle branch 37. Another handle branch 38 is articulated around an axis 39 passing through the plate 36, substantially in the middle of the base of the L. The branches 37 and 38 are completely similar to the branches 1 and 2 of FIG. 1.

La partie de la plaque 36 correspondant au jambage du L présente une fente allongée 40, dans le sens du jambage. La fente 40 est d'un côté rectiligne et de l'autre côté formée par des trous semi-circulaires 41 réunis par des segments rectilignes 42. La distance entre les segments 42 et le côté rectiligne est un peu inférieure à la distance entre les bords des demi-cercles 41 et le côté rectiligne. Les fentes de ce genre sont connues dans les pinces du genre à prises multiples, dans lesquelles elles sont prévues sur une branche de la pince tandis que l'autre branche est munie d'un axe passant dans la fente et ayant une section transversale formée d'un grand arc de cercle dont les extrémités sont réunies par une corde, la distance entre la corde et le fond de l'arc permettant de passer entre les espaces droits de la fente. Dans la fente 40 est glissé un tel axe 43 solidaire d'une butée 44. Le jambage du L de la plaque 36 et la butée 44 se manipulent aussi comme les branches d'une pince à prises multiples, le méplat de l'axe 43 permettant de le faire glisser dans la fente 40 pour positionner la butée à une distance convenable du pied du L.The part of the plate 36 corresponding to the jamb of the L has an elongated slot 40, in the direction of the jamb. The slot 40 is on a rectilinear side and on the other side formed by semi-circular holes 41 joined by rectilinear segments 42. The distance between the segments 42 and the rectilinear side is a little less than the distance between the edges semicircles 41 and the rectilinear side. Slots of this kind are known in pliers of the multiple socket type, in which they are provided on one branch of the clamp while the other branch is provided with an axis passing through the slot and having a cross section formed by '' a large circular arc whose ends are joined by a cord, the distance between the cord and the bottom of the arc allowing to pass between the straight spaces of the slot. In the slot 40 is slid such an axis 43 integral with a stop 44. The leg of the L of the plate 36 and the stop 44 are also handled like the branches of a pliers with multiple grips, the flat part of the axis 43 allowing it to slide into the slot 40 to position the stopper at a suitable distance from the foot of the L.

Le jambage du L présente également une nervure longitudinale en relief 45, parallèle du bord droit de la fente 40. La base de la butée 44 présente près de l'axe 43 deux bosselures, 46 et 47, tournées vers 36. La bosselure 46 est placée, au-dessus de l'axe 43, de l'autre côté de 45 par rapport à 43 et vient buter sur 45 en position de repos maintenant ainsi ouvert l'angle entre la butée et le L, malgré le poids de la butée. La bosselure 47 est placée au-dessous de l'axe 43, du même côté de 45 que 43. La bosselure 47 est au repos écartée de la rainure 45.The leg of the L also has a longitudinal rib in relief 45, parallel to the right edge of the slot 40. The base of the stop 44 has, near the axis 43, two embossments, 46 and 47, turned towards 36. The dent 46 is placed, above the axis 43, on the other side of 45 with respect to 43 and abuts on 45 in the rest position thus maintaining the angle between the stop and the L, despite the weight of the stop. The dent 47 is placed below the axis 43, on the same side of 45 as 43. The dent 47 is at rest separated from the groove 45.

La butée 44 est formée par une plaque pliée pour former une partie dièdrique s'ouvrant vers la base du L. La bosselure 47 sert de guide le long de 45 lorsqu'on bascule 44 autour de l'axe 43 pour donner une bonne orientation audit axe 43 par rapport à la crémaillère 40 afin de positionner la butée. Dans ce cas la bosselure 46 passe par-dessus 45 par déformation élastique du métal de la butée 44. La butée 44, en s'éloignant de la plaque 36 prend la forme d'un V retourné, le fond du V étant prolongé par un U retourné dont la hauteur est environ égale à la hauteur du dièdre et dont la largeur est environ le tiers de la plus grande largeur du dièdre.The stop 44 is formed by a plate folded to form a dihedral part opening towards the base of the L. The dent 47 serves as a guide along 45 when rocking 44 around the axis 43 to give a good orientation to said axis 43 relative to the rack 40 in order to position the stop. In this case, the dent 46 passes over 45 by elastic deformation of the metal of the stop 44. The stop 44, moving away from the plate 36 takes the form of an inverted V, the bottom of the V being extended by a U turned whose height is approximately equal to the height of the dihedral and whose width is approximately one third of the largest width of the dihedral.

La branche 38 a la forme générale en "7", la jambe du "7" formant un des manches de la pince. Elle tourne, autour de l'axe 39 de solidaire de la plaque 36, l'axe 39 étant situé, sur le manche 38, au sommet du "7". L'extrémité de la tête du "7" comporte un axe 48 engagé dans une fente 49 d'un bras 50, articulé autour de l'axe 51, qui se termine, à son extrémité libre, par une douille 52.The branch 38 has the general shape of "7", the leg of "7" forming one of the handles of the clamp. It rotates around the axis 39 integral with the plate 36, the axis 39 being located, on the handle 38, at the top of the "7". The end of the head of the "7" has an axis 48 engaged in a slot 49 of an arm 50, articulated around the axis 51, which ends, at its free end, by a socket 52.

La distance de l'axe 48 à l'axe 39 étant choisie nettement plus petite que celle de l'axe 48 à l'axe 51, le couple appliqué au bras 50 est nettement supérieur à celui qui est appliqué à la branche 38. On obtient ainsi une multiplication d'effort que l'on obtenait avec un train d'engrenages. A noter que l'on peut utiliser d'autres moyens adéquats pour transmettre le mouvement de la tête de "7" au prolongement du bras 50. Toutefois, les moyens qui sont décrits dans la présente demande sont particulièrement simples.The distance from the axis 48 to the axis 39 being chosen significantly smaller than that from the axis 48 to the axis 51, the torque applied to the arm 50 is significantly greater than that which is applied to the branch 38. We thus obtains a multiplication of effort which was obtained with a gear train. Note that one can use other suitable means to transmit the movement of the head from "7" to the extension of the arm 50. However, the means which are described in the present application are particularly simple.

A l'intérieur de la douille 52, est glissé le pivot 53 d'un manche pivotant portant une pointe de couteau 54 dirigée vers le creux de la butée 44. L'axe 51 est placé, sur la plaque 36, de manière que, quand le manche 38 est rapproché du manche 37, la pointe 54 se rapproche de la butée 44. Par ailleurs, la distance entre la pointe 54 et l'axe 51 est choisie assez courte pour obtenir un coefficient de multiplication de 5 ou 6 entre l'effort appliqué au manche 38 par les doigts et la force exercée par la pointe sur l'huître. Enfin, le pivot 53 est prolongé au-delà de la pointe 54 et a la forme de couteau à bout arrondi dont le fil 55 s'étend sur le bout et le dos du manche par rapport à la pointe 54.Inside the sleeve 52, the pivot 53 is slid from a pivoting handle carrying a knife tip 54 directed towards the hollow of the stop 44. The axis 51 is placed, on the plate 36, so that, when the handle 38 is brought closer to the handle 37, the tip 54 approaches the stop 44. Furthermore, the distance between the tip 54 and the axis 51 is chosen to be short enough to obtain a multiplication coefficient of 5 or 6 between the force applied to the handle 38 by the fingers and the force exerted by the tip on the oyster. Finally, the pivot 53 is extended beyond the tip 54 and has the shape of a knife with a rounded tip, the wire 55 of which extends over the tip and the back of the handle relative to the tip 54.

L'autre extrémité du pivot 53, par rapport à la pointe 54, se termine en forme de petit dièdre 56, qui limite la rotation du pivot 53 entre deux positions angulaires faisant entre elles un angle égal au dièdre 56. En effet, les faces du dièdre servent de butée quand elles viennent en contact avec la surface plane 57 du manche lié à l'axe 51.The other end of the pivot 53, relative to the tip 54, ends in the form of a small dihedral 56, which limits the rotation of the pivot 53 between two angular positions forming between them an angle equal to the dihedral 56. In fact, the faces of the dihedral serve as a stop when they come into contact with the flat surface 57 of the handle linked to the axis 51.

La pince est encore complétée par un ressort 58 qui, au repos, maintient les branches 37 et 38 écartées.The clamp is further supplemented by a spring 58 which, at rest, keeps the arms 37 and 38 apart.

La branche 37 et la plaque 36 peuvent, bien entendu, ne faire qu'une seule pièce, simplifiant ainsi la construction de la pince.The branch 37 and the plate 36 can, of course, be one piece, thus simplifying the construction of the clamp.

Le fond 59 de la fente 60 prévue dans la plaque de la butée 44, pour qu'elle puisse être installée à cheval sur le bord du L de la plaque 36, peut être renforcé, pour les raisons que l'on verra dans la suite.The bottom 59 of the slot 60 provided in the plate of the stop 44, so that it can be installed astride the edge of the L of the plate 36, can be reinforced, for the reasons that will be seen below. .

A la Fig. 5, la double flèche F5 indique les mouvements que la pointe 54 peut exécuter autour de l'axe 51, la flèche F6 indique le mouvement qu'il faut donner à la butée 44 autour de son axe 43, avant de régler sa position dans la fente 40, et la double flèche F7 indique les mouvements que peut exécuter l'axe 43 dans la fente 40. Le trou oblong 49 limite le mouvement de la branche 38 qui décrit un arc de cercle correspondant à l'arc décrit par l'axe 48, faisant ainsi pivoter la pointe 54 vers le haut, et venant en butée sur l'extrémité la plus éloignée de l'axe 51 en position ouverte, et sur l'extrémité la plus proche de l'axe 51 en position fermée. La branche 38 a, dans la zone où elle est saisie par les doigts, une épaisseur de l'ordre de 1 cm, et, dans sa zone de raccordement avec la plaque 36, elle est plate et fixée d'un seul côté de celle-ci.In Fig. 5, the double arrow F5 indicates the movements that the point 54 can execute around the axis 51, the arrow F6 indicates the movement which must be given to the stop 44 around its axis 43, before adjusting its position in the slot 40, and the double arrow F7 indicates the movements which the axis 43 can execute in the slot 40. The oblong hole 49 limits the movement of the branch 38 which describes an arc of a circle corresponding to the arc described by the axis 48, thereby pivoting the tip 54 upward, and abutting on the end furthest from the axis 51 in the open position, and on the end closest to the axis 51 in the closed position. The branch 38 has, in the zone where it is grasped by the fingers, a thickness of the order of 1 cm, and, in its zone of connection with the plate 36, it is flat and fixed on only one side of that -this.

Enfin, à titre d'illustration, on a fait figurer, à la Fig. 5, en traits tirets, une huître 61 avec sa charnière 62 en contact avec la pointe 54 et sa partie opposée 63 en contact avec le fond de la butée 44, ou simplement pincée entre les branches du U du fond de la butée 44.Finally, by way of illustration, FIG. 5, in dashed lines, an oyster 61 with its hinge 62 in contact with the tip 54 and its opposite part 63 in contact with the bottom of the stop 44, or simply pinched between the branches of the U of the bottom of the stop 44.

Le fond à section en U de la butée 44 a pour effet d'éviter que le bord de l'huître, opposé à la charnière, ne subisse un trop gros effort et ne se brise. En effet, ce bord s'enfonce, comme un coin, dans la partie à section en U, mais n'en atteint pas le fond. Les efforts sont alors transmis à la coquille d'huître dans une zone où elle ne risque pas de se casser. La largeur du U est de l'ordre de quelques millimètres.The bottom of the U-shaped section of the stop 44 has the effect of preventing the edge of the oyster, opposite the hinge, from being subjected to too great a force and from breaking. Indeed, this edge sinks, like a corner, into the U-shaped section, but does not reach the bottom. The efforts are then transmitted to the oyster shell in an area where it is not likely to break. The width of the U is of the order of a few millimeters.

On peut prévoir également, dans la fourche de la butée 44, un revêtement de matière souple, telle que du caoutchouc ou tout autre matière adéquate, pour éviter d'ébrécher l'arrière de l'huître.One can also provide, in the fork of the stop 44, a coating of flexible material, such as rubber or any other suitable material, to avoid chipping the rear of the oyster.

Claims (10)

1) Pince pour ouvrir les huîtres comprenant un manche portant une pointe de couteau et une butée maintenant la partie de l'huître opposée à la pointe de couteau, le manche tournant autour d'un premier axe qui est mis en rotation par la fermeture des branches de la pince, caractérisée en ce que la pointe de couteau est montée librement pivotante sur ledit manche.1) Pliers for opening oysters comprising a handle carrying a knife tip and a stop holding the part of the oyster opposite the knife tip, the handle rotating around a first axis which is rotated by closing the pliers of the pliers, characterized in that the knife tip is mounted to pivot freely on said handle. 2) Pince suivant la revendication 1, caractérisée en ce que la butée est montée sur une plaque de base portant ledit premier axe par l'intermédiaire d'un second axe, à section formée de deux parties cylindriques raccordées par des méplats, déplaçable dans une fente formée de trous circulaires raccordés par des espaces plus étroits.2) Pliers according to claim 1, characterized in that the stop is mounted on a base plate carrying said first axis by means of a second axis, section formed by two cylindrical parts connected by flats, movable in a slot formed by circular holes connected by narrower spaces. 3) Pince suivant la revendication 1 ou 2, caractérisée en ce que ledit premier axe est entraîné par un premier pignon engrenant un second pignon monté sur un troisième axe entraîné par une des branches.3) Pliers according to claim 1 or 2, characterized in that said first axis is driven by a first pinion meshing with a second pinion mounted on a third axis driven by one of the branches. 4) Pince suivant l'une des revendications 1 à 3, caractérisée en ce que le pivotement de la pointe de couteau sur son manche est limité par deux butées.4) Pliers according to one of claims 1 to 3, characterized in that the pivoting of the knife tip on its handle is limited by two stops. 5) Pince suivant l'une des revendications 1 à 4, caractérisée en ce que la base de la pointe de couteau est prolongée longitudinalement pour former le bout rond d'une lame de couteau.5) Pliers according to one of claims 1 to 4, characterized in that the base of the knife tip is extended longitudinally to form the round end of a knife blade. 6) Pince pour ouvrir les huîtres suivant l'une des revendications 3 à 5, caractérisée en ce que le train de pignons est remplacé par des moyens de transmission qui comprenent un premier bras, solidaire de la branche mobile et portant un ergot qui est engagé dans une rainure ou fente d'un second bras, solidaire du manche portant la pointe de couteau, l'ergot tournant avec la branche mobile et, par l'intermédiaire des bords de la rainure, entraînant le manche en rotation.6) Pliers to open the oysters according to one of claims 3 to 5, characterized in that the gear train is replaced by transmission means which include a first arm, integral with the movable branch and carrying a lug which is engaged in a groove or slot of a second arm, integral with the handle carrying the knife tip, the lug rotating with the movable branch and, through the edges of the groove, driving the handle in rotation. 7) Pince suivant la revendication 6, caractérisée en ce que la rotation du manche est limitée par les extrémités de la fente.7) Pliers according to claim 6, characterized in that the rotation of the handle is limited by the ends of the slot. 8) Pince suivant la revendication 6 ou 7, caractérisée en ce que la butée dièdrique présente un fond à section en U relativement étroit.8) Pliers according to claim 6 or 7, characterized in that the dihedral stop has a bottom with a relatively narrow U-section. 9) Pince suivant l'une des revendications 1 à 8, caractérisée en ce que les faces internes de la butée sont revêtues d'une couche de matière souple.9) Pliers according to one of claims 1 to 8, characterized in that the internal faces of the stop are coated with a layer of flexible material. 10) Pince suivant l'une des revendications 1 à 9, caractérisée en ce que la plaque comporte une nervure, parallèle à la crémaillère, et la base de la butée présente du côté de la nervure, deux bosselures qui, en association avec la nervure; limitent la rotation libre de la butée dans les deux sens, une des bosselures pouvant passer en force sur la nervure en cas de réglage de la position de la butée.10) Pliers according to one of claims 1 to 9, characterized in that the plate has a rib, parallel to the rack, and the base of the stop has on the side of the rib, two dents which, in association with the rib ; limit the free rotation of the stopper in both directions, one of the bosses being able to pass in force on the rib in the event of adjustment of the position of the stopper.
EP80401200A 1979-08-23 1980-08-21 Oyster tongs Withdrawn EP0025378A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR7921619A FR2463601A1 (en) 1979-08-23 1979-08-23 Tool for opening oysters - has main adjustable position handle and swing handle with blade fitting between shells
FR7921619 1979-08-23
FR8014174A FR2484813A2 (en) 1980-06-23 1980-06-23 Tool for opening oysters - has main adjustable position handle and swing handle with blade fitting between shells
FR8014174 1980-06-23

Publications (1)

Publication Number Publication Date
EP0025378A1 true EP0025378A1 (en) 1981-03-18

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EP80401200A Withdrawn EP0025378A1 (en) 1979-08-23 1980-08-21 Oyster tongs

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EP (1) EP0025378A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757759A1 (en) * 1996-12-30 1998-07-03 Quernez Jean Jacques Pierre Oyster opener with fixed part guiding blade
WO1999003383A1 (en) * 1997-07-18 1999-01-28 Anthony Pham Instrument for opening oysters
FR3094882A1 (en) 2019-04-10 2020-10-16 Patrick Rossi CLAMP DEVICE FOR OPENING OYSTERS

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR355575A (en) * 1905-06-24 1905-11-07 Charles Leon Auge Mechanical device for opening oysters
FR399264A (en) * 1909-02-09 1909-06-25 Jean Danon Device to open oysters
FR470692A (en) * 1914-04-08 1914-09-24 Rudolf Hempel Tool for opening oysters
FR822586A (en) * 1936-11-12 1938-01-04 Automatic device applicable in particular to opening oysters or molluscs, etc.
US2473608A (en) * 1945-09-24 1949-06-21 Plock John Oyster opening method
FR1101117A (en) * 1954-05-24 1955-09-28 Device for opening oysters or other shellfish
FR1225219A (en) * 1959-05-06 1960-06-29 Instant and automatic adjustment device for opening oysters
FR1443367A (en) * 1965-05-13 1966-06-24 Oyster cutter
FR1579646A (en) * 1968-06-21 1969-08-29
CA896819A (en) * 1970-06-08 1972-04-04 Brisson Louis Oyster shell opener
FR2159585A5 (en) * 1971-11-04 1973-06-22 Toluzzo Hubert
BE870134A (en) * 1978-09-01 1979-03-01 Crombach Invest Cy S A SHELL OPENER

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR355575A (en) * 1905-06-24 1905-11-07 Charles Leon Auge Mechanical device for opening oysters
FR399264A (en) * 1909-02-09 1909-06-25 Jean Danon Device to open oysters
FR470692A (en) * 1914-04-08 1914-09-24 Rudolf Hempel Tool for opening oysters
FR822586A (en) * 1936-11-12 1938-01-04 Automatic device applicable in particular to opening oysters or molluscs, etc.
US2473608A (en) * 1945-09-24 1949-06-21 Plock John Oyster opening method
FR1101117A (en) * 1954-05-24 1955-09-28 Device for opening oysters or other shellfish
FR1225219A (en) * 1959-05-06 1960-06-29 Instant and automatic adjustment device for opening oysters
FR1443367A (en) * 1965-05-13 1966-06-24 Oyster cutter
FR1579646A (en) * 1968-06-21 1969-08-29
CA896819A (en) * 1970-06-08 1972-04-04 Brisson Louis Oyster shell opener
FR2159585A5 (en) * 1971-11-04 1973-06-22 Toluzzo Hubert
BE870134A (en) * 1978-09-01 1979-03-01 Crombach Invest Cy S A SHELL OPENER

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2757759A1 (en) * 1996-12-30 1998-07-03 Quernez Jean Jacques Pierre Oyster opener with fixed part guiding blade
WO1999003383A1 (en) * 1997-07-18 1999-01-28 Anthony Pham Instrument for opening oysters
FR3094882A1 (en) 2019-04-10 2020-10-16 Patrick Rossi CLAMP DEVICE FOR OPENING OYSTERS

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