WO2000000067A1 - Oyster opening device - Google Patents

Oyster opening device Download PDF

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Publication number
WO2000000067A1
WO2000000067A1 PCT/FR1999/001563 FR9901563W WO0000067A1 WO 2000000067 A1 WO2000000067 A1 WO 2000000067A1 FR 9901563 W FR9901563 W FR 9901563W WO 0000067 A1 WO0000067 A1 WO 0000067A1
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WO
WIPO (PCT)
Prior art keywords
blade
oyster
axis
orifice
head
Prior art date
Application number
PCT/FR1999/001563
Other languages
French (fr)
Inventor
Jacques Pitoux
Michel Pitoux
Original Assignee
Jacques Pitoux
Michel Pitoux
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Jacques Pitoux, Michel Pitoux filed Critical Jacques Pitoux
Priority to AU43764/99A priority Critical patent/AU4376499A/en
Publication of WO2000000067A1 publication Critical patent/WO2000000067A1/en

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Classifications

    • 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
    • A47G21/068—Devices for piercing the upper shell of oysters; Muscle cutters for use therewith

Definitions

  • the present invention relates to a device allowing an easy opening of oysters after having arranged an orifice in their cover, near the adductor muscle which retains the two valves; it also relates to the oyster equipped with such a device to facilitate opening.
  • Document FR-A-1 194 003 describes a method for opening oysters consisting in piercing a hole in the upper valve of the shell, near the adductor muscle, then consisting in introducing through this hole a tool with a sharp blade capable of cutting said muscle by a rotational movement of said blade.
  • the slicing tool used is in the form of a cobbler's awl with a grip handle; it is introduced into the oyster when it is desired to make the opening. Because of its shape and rigid structure, this tool presents the risk of damaging the oyster flesh during its introduction and during the rotation maneuver.
  • Document FR-A-2 739 539 describes a similar process consisting in carrying out a simple pre-drilling on the lid of the oyster, or in carrying out a complete piercing closed with a tight plug, then when it is desired to open the oyster, to introduce a sharp rod allowing to cut the adductor muscle.
  • the object of the present invention is to propose a device for opening oysters, of simple and effective structure which limits as much as possible the deterioration of the shell flesh.
  • This device is used after having arranged an orifice in the lid of the oyster, near the adductor muscle which retains its two valves and it is of the type consisting of a sharp blade extended by an operating member, which blade, introduced into the body of the oyster by said orifice, is capable of slicing said muscle by a rotation operation exerted by means of the operating member.
  • this device comprises an arc-shaped blade having a certain flexibility in its plane of curvature and provided with at least one sharp side edge.
  • the blade can thus enter the oyster through the opening in the lid, minimizing injuries to the flesh; after entering the shell, it comes to bear against the internal face of the cover so as to cut the muscle as close as possible to said cover, by an action of rotation of the external operating member.
  • this device comprises a head whose dimensions are greater than those of the orifice arranged in the lid of the oyster, and which is provided with a lower face intended to come to bear against the external face of said lid.
  • This head is extended from said bearing face by an axis whose dimensions are smaller than those of said orifice to allow its introduction therein, which axis comprises, at its end, the blade in the form of a flexible arc which goes up towards the plane of said bearing face.
  • the support axis of the flexible blade has a length slightly greater than the thickness of the oyster cover and this blade rises, at rest, beyond a plane corresponding to the internal face of said cover, such that the flexible blade comes to bear against said internal face of the cover when the head is in abutment against its external face.
  • the flexible blade is in the form of a quarter of a circle, the base of which extends substantially perpendicularly to its support axis and the end of which rises, at rest, beyond the bearing face of the head.
  • the opening device comprises at least one flexible fin arranged in the lower part of the blade support axis, to ensure that it remains in position on the oyster, after introduction of said axis into the orifice reception. This feature makes it possible to equip the oyster well before carrying out its opening operation; it is thus possible to position the device on the shell in full cultivation or awaiting sale, a few days or even a few weeks before its consumption.
  • the opening device comprises a locking bulge in the lower part of the blade support axis, associated with a flexibility slot, so as to maintain it in position on the oyster after having introduces said axis into its receiving orifice.
  • the device comprises a head in the form of a flat pellet which is extended by a manual gripping member extending in a plane perpendicular to said pellet and making it possible to impart the rotational movement of the blade to ensure the slicing the muscle.
  • the flexible blade is advantageously provided with two sharp side edges. We can thus ensure the slicing operation regardless of the direction of rotation of the blade which facilitates and secures the opening.
  • the invention also relates to the oyster which is equipped with the opening device described above.
  • This oyster may also include an informative and / or advertising label strung on the axis of the opening device and which is positioned between the head of this device and the oyster cover.
  • FIG. 3 is a top view of this device
  • FIG. 4 is an enlarged sectional view of the flexible blade, according to 4-4 of Figure 1;
  • FIG. 9 is an enlarged sectional view which shows the opening device positioned on the lid of the oyster;
  • FIG. 10 is an overall view, from above, of an oyster equipped with the opening device according to the invention;
  • FIG. 11 illustrates a second possible embodiment of the opening device according to the invention, side view
  • FIG. 12 is a partial view, from behind, of the lower part of the device in FIG. 11.
  • the oyster opening device 1 comprises a head 2 in the form of a cylindrical pellet from the lower face 3 from which extends an axis 5 provided, at its end, two flexible fins 6 and a curved cutting blade 8.
  • the blade 8 has a certain flexibility in the direction of its plane of curvature, which plane of curvature extends substantially perpendicular to the plane in which fits the head 2.
  • the blade 8 has a shape close to the quarter circle; its base extends substantially perpendicular to the axis 5 and it then goes up towards the plane in which the head 2 is inscribed. The end of this blade 8 extends substantially perpendicular to the plane of the head 2 and it goes up to the beyond the level of this plan.
  • the curvature of the blade 8 can be less accentuated.
  • the blade 8 has a substantially triangular section, with a flat base 10 and two sharp side edges 12.
  • the two flexible fins 6 extend in the plane of the blade 8, starting from a conical bulge 14 which forms an interface piece between the end of the axis 5 and the base of the blade 8; they are diametrically opposite on either side of the axis 5 and they rise slightly towards the head 2 to form a flexible V whose size is greater than the diameter of said axis 5.
  • the upper face 15 of the head 2 has a diametrical extension 16 which constitutes a manual gripping member.
  • This extension 16 has a generally semi-cylindrical shape whose diameter is slightly greater than that of the head 2; as shown in Figure 2, its thickness increases slightly from the head 2 to its upper part to facilitate handling.
  • This gripping member 16 extends in the plane of the blade 8.
  • This opening device 1 forms a kind of one-piece key made by molding plastic material, such as polyacetal for example.
  • the dimensions of its various constituent parts are adapted to allow its positioning in an orifice provided in the oyster cover, the underside 3 of the head 2 coming to bear on this cover, the axis 5 being placed in said orifice, the fins 6 ensuring its blocking on said cover and the blade 8 allowing the slicing of the adductor muscle by a rotational movement by means of the external operating member 16.
  • the head 2 has a bulk greater than the diameter of the hole in the lid of the oyster; the axis 5 has a diameter less than the diameter of this orifice and the distance which separates the support face 3 and the flexible fins 6 is slightly greater than the thickness of the oyster cover.
  • 5) consists in piercing an orifice 18 in its cover 19, preferably by means of a forest; one can for example use a forest with a diameter of 6 mm for an axis 5 having a diameter of 5.5 mm.
  • This orifice 18 is made near the adductor muscle 20 which is known to be located about two-thirds of the length on hollow oysters and about half of the length on flat oysters.
  • the opening key 1 is positioned on the oyster by inserting the tip of its blade 8 into the orifice 18 (FIG. 6), and this by a rotational movement, following its curvature. Because of this curvature and its flexibility, the blade 8 gradually bears against the internal face of the cover 19 ( Figure 7). Light force is applied to cause the flexible fins 6 to penetrate into the orifice 18; after having completely passed through said orifice 18, these fins 6 move apart and the axis 5 is locked in position between said fins 6, on one side, and the head 2, on the other, as is shown in Figures 8 and 9.
  • the blade 8 is almost always in contact with the internal face of the oyster lid, which avoids injuring the surrounding flesh.
  • pressing the blade 8 against the internal face of the cover promotes the maintenance in position of the opening key 1.
  • the oyster is then opened very simply by rotating the operating member 16 on itself to drive the blade 8 in rotation (FIG. 10).
  • the cutting edge 12 of the blade makes it possible to cut the adductor muscle 20 without difficulty and the released cover 19 can then be removed very easily by simple traction.
  • the blade 8 As the blade 8 is in abutment against the internal face of the cover 19, it can therefore cut the muscle 20 in its area of attachment to said cover. This makes it possible to limit the amount of flesh remaining attached to the lid and this optimizes the quality of opening. Of course, to obtain complete cutting of the adductor muscle 20, care should be taken to position the orifice 18 at a distance from this muscle 20 less than the length of the blade 8. It will also be noted that the presence of the two sharp edges 12 of the blade 8 makes it possible to print the rotational movement for opening in any direction. This feature is interesting when it is necessary to use several blades to cut the muscle, while the edge of the oyster prevents this blade from making a full turn on itself.
  • the operation of sectioning the oyster muscle can be carried out just after positioning the opening key 1.
  • the laying of this key will be carried out by the oyster farmer during the packaging of the oysters, or before, or directly on the fishmonger's stall, while the actual opening operation will be carried out by the consumer.
  • the opening device described in Figures 1 to 10 does not constitute a plug for sealingly sealing the orifice 18 provided in the lid of the oyster. Despite this, it is entirely conceivable to equip the lid with oysters, then put them back in culture or in waiting tanks for several days, or even several weeks, without seeing any harmful consequences on the survival of molluscs, nor any particular alteration in their taste, organoleptic and microbiological qualities.
  • an advertising or informative label 22 can be threaded on the axis 5 of the opening key 1 via an appropriate orifice; after the installation of this key, the label 22 is blocked between the head 2 and the oyster cover.
  • the operating member 16 can also be provided foldable against the head
  • FIGS 11 and 12 illustrate an alternative embodiment of the opening device 1 'according to the present invention.
  • the head 2 ' in the form of a cylindrical patch on the upper face of which there is an external operating member 16' and from the face lower of which extends an axis 5 'provided at its end with a curved cutting blade 8'.
  • This slot 28 is positioned behind the base of the blade 8 '; it extends over the entire height of the bulge 26 and over a little more than half the height of the axis 5 '.
  • the slot 28 allows the bulge 26 to pass by force through the orifice 18 arranged in the oyster cover; and this bulge 26 then ensures the locking of the device on the shell cover.
  • the blade 8 has two sharp side edges.
  • the gripping and maneuvering member 16 ′ extends beyond the sides of the head 2 ′; this feature makes it possible to increase the grip effect of the device in order to facilitate its installation and to optimize the operations of slicing the adductor muscle.
  • the head 2, 2 ′ of the opening device is in the form of a cylindrical patch; of course any other form can be envisaged.

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  • Processing Of Meat And Fish (AREA)

Abstract

The invention concerns a device (1) for opening an oyster after providing an orifice (18) in its lid (19), close to its adductor (20) which maintains its two valves. Said device comprises a head (2) with an operating member (16) whereof the dimensions are larger then those of the orifice (18). Said head (2) is provided with an internal surface (3) designed to be urged to be supported against the lid (19) external surface and extends from said support surface (3) via a pin (5) whereof the dimensions are smaller than those of said orifice (18), so that it can be inserted therein. The pin (5) comprises, at its end, an arc-shaped blade (8) provided with some flexibility in its plane of curvature; said blade (8) extends upwards towards the support surface (3) plane and comprises a lateral cutting edge for severing the adductor (20) by a rotating movement exerted by means of the operating member (16).

Description

DISPOSITIF POUR OUVRIR LES HUÎTRESDEVICE FOR OPENING OYSTERS
La présente invention concerne un dispositif permettant une ouverture facile des huîtres après avoir aménagé un orifice dans leur couvercle, à proximité du muscle adducteur qui retient les deux valves ; elle concerne également l'huître équipée d'un tel dispositif pour en faciliter l'ouverture.The present invention relates to a device allowing an easy opening of oysters after having arranged an orifice in their cover, near the adductor muscle which retains the two valves; it also relates to the oyster equipped with such a device to facilitate opening.
Le document FR-A-1 194 003 décrit un procédé pour l'ouverture des huîtres consistant à percer un trou dans la valve supérieure du coquillage, à proximité du muscle adducteur, puis consistant à introduire par ce trou un outil à lame tranchante apte à couper ledit muscle par un mouvement de rotation de ladite lame.Document FR-A-1 194 003 describes a method for opening oysters consisting in piercing a hole in the upper valve of the shell, near the adductor muscle, then consisting in introducing through this hole a tool with a sharp blade capable of cutting said muscle by a rotational movement of said blade.
L'outil de tranchage utilisé se présente sous la forme d'une alêne de cordonnier munie d'un manche de préhension ; il est introduit dans l'huître au moment où on désire réaliser l'ouverture. Du fait de sa forme et de sa structure rigide, cet outil présente le risque de détériorer les chairs de l'huître lors de son introduction et lors de la manoeuvre de rotation.The slicing tool used is in the form of a cobbler's awl with a grip handle; it is introduced into the oyster when it is desired to make the opening. Because of its shape and rigid structure, this tool presents the risk of damaging the oyster flesh during its introduction and during the rotation maneuver.
Le document FR-A-2 739 539 décrit un procédé similaire consistant à réaliser un simple préperçage sur le couvercle de l'huître, ou à réaliser un perçage complet obturé par un bouchon étanche, puis lorsque l'on désire ouvrir l'huître, à introduire une tige tranchante permettant de sectionner le muscle adducteur.Document FR-A-2 739 539 describes a similar process consisting in carrying out a simple pre-drilling on the lid of the oyster, or in carrying out a complete piercing closed with a tight plug, then when it is desired to open the oyster, to introduce a sharp rod allowing to cut the adductor muscle.
Là encore, les différents outils envisagés pour sectionner le muscle détériorent inévitablement les chairs de l'huître lors de leur introduction et aussi lors de leur manoeuvre de rotation. Dans le document FR-A-2 745 484, après perçage d'un orifice dans le couvercle de l'huître à proximité du muscle adducteur, on ferme ledit orifice par un bouchon étanche ou quasiment étanche. On utilise ensuite un organe tranchant en forme d'équerre introduit par cet orifice pour couper le muscle qui retient les deux valves. Dans cette technique également, l'organe tranchant en forme d'équerre présente le grand risque de blesser les chairs de l'huître, voire de les détériorer de façon importante lors de son introduction ou au moment de son utilisation pour l'ouverture. Cela peut nuire à la présentation de l'huître après ouverture, ou encore à la durée de survie du coquillage lorsque l'outil de tranchage est intégré au bouchon d'obturation.Here again, the various tools envisaged for cutting the muscle inevitably deteriorate the oyster flesh during their introduction and also during their rotation maneuver. In document FR-A-2 745 484, after piercing an orifice in the lid of the oyster near the adductor muscle, said orifice is closed by a tight or almost tight stopper. We then use a square-shaped cutting member inserted through this orifice to cut the muscle that holds the two valves. Also in this technique, the cutting-off member in the form of a square presents the great risk of injuring the flesh of the oyster, or even of deteriorating it significantly during its introduction or at the time of its use. for opening. This can adversely affect the presentation of the oyster after opening, or even the survival time of the shell when the slicing tool is integrated into the closure plug.
D'autre part, si le tranchage est réalisé dans le corps du muscle, il est nécessaire de décoller la partie qui reste attenante au couvercle pour récupérer l'intégralité des chairs.On the other hand, if the slicing is carried out in the body of the muscle, it is necessary to peel off the part which remains adjacent to the lid to recover all of the flesh.
Le but de la présente invention est de proposer un dispositif pour l'ouverture des huîtres, de structure simple et efficace qui limite au maximum la détérioration des chairs du coquillage. Ce dispositif est utilisé après avoir aménagé un orifice dans le couvercle de l'huître, à proximité du muscle adducteur qui retient ses deux valves et il est du type constitué d'une lame tranchante prolongée par un organe de manoeuvre, laquelle lame, introduite dans le corps de l'huître par ledit orifice, est apte à trancher ledit muscle par une opération de rotation exercée au moyen de l'organe de manoeuvre.The object of the present invention is to propose a device for opening oysters, of simple and effective structure which limits as much as possible the deterioration of the shell flesh. This device is used after having arranged an orifice in the lid of the oyster, near the adductor muscle which retains its two valves and it is of the type consisting of a sharp blade extended by an operating member, which blade, introduced into the body of the oyster by said orifice, is capable of slicing said muscle by a rotation operation exerted by means of the operating member.
Conformément à l'invention, ce dispositif comporte une lame en forme d'arc disposant d'une certaine souplesse dans son plan de courbure et muni d'au moins une bordure tranchante latérale. La lame peut ainsi pénétrer dans l'huître par l'orifice aménagé dans le couvercle en minimisant les blessures des chairs ; après avoir pénétré dans le coquillage, elle vient en appui contre la face interne du couvercle de façon à assurer le tranchage du muscle au plus près dudit couvercle, par une action de rotation de l'organe de manoeuvre externe.According to the invention, this device comprises an arc-shaped blade having a certain flexibility in its plane of curvature and provided with at least one sharp side edge. The blade can thus enter the oyster through the opening in the lid, minimizing injuries to the flesh; after entering the shell, it comes to bear against the internal face of the cover so as to cut the muscle as close as possible to said cover, by an action of rotation of the external operating member.
Toujours selon l'invention, ce dispositif comporte une tête dont les dimensions sont supérieures à celles de l'orifice aménagé dans le couvercle de l'huître, et qui est munie d'une face inférieure destinée à venir en appui contre la face externe dudit couvercle. Cette tête se prolonge à partir de ladite face d'appui par un axe dont les dimensions sont inférieures à celles dudit orifice pour permettre son introduction dans celui-ci, lequel axe comporte, à son extrémité, la lame en forme d'arc souple qui remonte en direction du plan de ladite face d'appui. De préférence, l'axe support de la lame souple a une longueur légèrement supérieure à l'épaisseur du couvercle de l'huître et cette lame remonte, au repos, au-delà d'un plan correspondant à la face interne dudit couvercle, de telle sorte que la lame souple vienne en appui contre ladite face interne du couvercle lorsque la tête est en appui contre sa face externe.Still according to the invention, this device comprises a head whose dimensions are greater than those of the orifice arranged in the lid of the oyster, and which is provided with a lower face intended to come to bear against the external face of said lid. This head is extended from said bearing face by an axis whose dimensions are smaller than those of said orifice to allow its introduction therein, which axis comprises, at its end, the blade in the form of a flexible arc which goes up towards the plane of said bearing face. Preferably, the support axis of the flexible blade has a length slightly greater than the thickness of the oyster cover and this blade rises, at rest, beyond a plane corresponding to the internal face of said cover, such that the flexible blade comes to bear against said internal face of the cover when the head is in abutment against its external face.
Selon un mode de réalisation préféré, la lame souple est en forme de quart de cercle dont la base s'étend sensiblement perpendiculairement à son axe support et dont l'extrémité remonte, au repos, au-delà de la face d'appui de la tête. Selon un mode de réalisation particulier, le dispositif d'ouverture comporte au moins une ailette flexible aménagée dans la partie inférieure de l'axe support de lame, pour assurer son maintien en position sur l'huître, après introduction dudit axe dans l'orifice de réception. Cette particularité permet d'équiper l'huître bien avant de réaliser son opération d'ouverture ; on peut ainsi positionner le dispositif sur le coquillage en pleine culture ou en attente de vente, quelques jours voire quelques semaines avant sa consommation.According to a preferred embodiment, the flexible blade is in the form of a quarter of a circle, the base of which extends substantially perpendicularly to its support axis and the end of which rises, at rest, beyond the bearing face of the head. According to a particular embodiment, the opening device comprises at least one flexible fin arranged in the lower part of the blade support axis, to ensure that it remains in position on the oyster, after introduction of said axis into the orifice reception. This feature makes it possible to equip the oyster well before carrying out its opening operation; it is thus possible to position the device on the shell in full cultivation or awaiting sale, a few days or even a few weeks before its consumption.
On prévoit de préférence deux ailettes flexibles disposées dans le plan de la lame souple. Selon un autre mode de réalisation, le dispositif d'ouverture comporte un renflement de verrouillage dans la partie inférieure de l'axe support de lame, associé à une fente de flexibilité, de manière à assurer son maintien en position sur l'huître après avoir introduit ledit axe dans son orifice de réception.There are preferably two flexible fins arranged in the plane of the flexible blade. According to another embodiment, the opening device comprises a locking bulge in the lower part of the blade support axis, associated with a flexibility slot, so as to maintain it in position on the oyster after having introduces said axis into its receiving orifice.
Toujours selon l'invention, le dispositif comporte une tête en forme de pastille plate qui se prolonge par un organe de préhension manuel s'étendant dans un plan perpendiculaire à ladite pastille et permettant d'imprimer le mouvement de rotation de la lame pour assurer le tranchage du muscle.Still according to the invention, the device comprises a head in the form of a flat pellet which is extended by a manual gripping member extending in a plane perpendicular to said pellet and making it possible to impart the rotational movement of the blade to ensure the slicing the muscle.
D'autre part, la lame souple est avantageusement munie de deux bordures latérales tranchantes. On peut ainsi assurer l'opération de tranchage quel que soit le sens de rotation de la lame ce qui permet de faciliter et de sécuriser l'ouverture. L'invention concerne encore l'huître qui est équipée du dispositif d'ouverture décrit ci-dessus.On the other hand, the flexible blade is advantageously provided with two sharp side edges. We can thus ensure the slicing operation regardless of the direction of rotation of the blade which facilitates and secures the opening. The invention also relates to the oyster which is equipped with the opening device described above.
Cette huître peut aussi comporter une étiquette informative et/ou publicitaire enfilée sur l'axe du dispositif d'ouverture et qui est positionnée entre la tête de ce dispositif et le couvercle de l'huître.This oyster may also include an informative and / or advertising label strung on the axis of the opening device and which is positioned between the head of this device and the oyster cover.
Mais l'invention sera encore illustrée, sans être aucunement limitée, par la description suivante de deux modes de réalisation particuliers, donnés uniquement à titre d'exemple et représentés sur les dessins annexés dans lesquels : - la figure 1 est une vue de côté d'une première forme de réalisation possible du dispositif d'ouverture conforme à l'invention ;However, the invention will be further illustrated, without being in any way limited, by the following description of two particular embodiments, given solely by way of example and represented in the accompanying drawings in which: - Figure 1 is a side view of 'a first possible embodiment of the opening device according to the invention;
- la figure 2 montre le dispositif d'ouverture vu de derrière ;- Figure 2 shows the opening device seen from behind;
- la figure 3 est une vue de dessus de ce dispositif ;- Figure 3 is a top view of this device;
- la figure 4 est une vue en coupe agrandie de la lame souple, selon 4-4 de la figure 1 ;- Figure 4 is an enlarged sectional view of the flexible blade, according to 4-4 of Figure 1;
- les figures 5, 6, 7 et 8 montrent, en quatre étapes, le principe de positionnement du dispositif d'ouverture sur l'huître ;- Figures 5, 6, 7 and 8 show, in four stages, the principle of positioning the opening device on the oyster;
- la figure 9 est une vue en coupe agrandie qui montre le dispositif d'ouverture positionné sur le couvercle de l'huître ; - la figure 10 est une vue d'ensemble, de dessus, d'une huître équipée du dispositif d'ouverture conforme à l'invention ;- Figure 9 is an enlarged sectional view which shows the opening device positioned on the lid of the oyster; - Figure 10 is an overall view, from above, of an oyster equipped with the opening device according to the invention;
- la figure 11 illustre une seconde forme de réalisation possible du dispositif d'ouverture conforme à l'invention, vue de côté ;- Figure 11 illustrates a second possible embodiment of the opening device according to the invention, side view;
- la figure 12 est une vue partielle, de derrière, de la partie inférieure du dispositif de la figure 11.FIG. 12 is a partial view, from behind, of the lower part of the device in FIG. 11.
Tel qu'on l'a représenté sur les figures 1 à 4, le dispositif d'ouverture d'huître 1 comporte une tête 2 en forme de pastille cylindrique à partir de la face inférieure 3 de laquelle s'étend un axe 5 muni, à son extrémité, de deux ailettes flexibles 6 et d'une lame de tranchage recourbée 8. La lame 8 dispose d'une certaine souplesse dans le sens de son plan de courbure, lequel plan de courbure s'étend sensiblement perpendiculairement au plan dans lequel s'inscrit la tête 2. Comme cela apparaît sur la figure 1 , la lame 8 a une forme voisine du quart de cercle ; sa base s'étend sensiblement perpendiculairement à l'axe 5 et elle remonte ensuite vers le plan dans lequel s'inscrit la tête 2. L'extrémité de cette lame 8 s'étend sensiblement perpendiculairement au plan de la tête 2 et elle remonte au-delà du niveau de ce plan.As shown in FIGS. 1 to 4, the oyster opening device 1 comprises a head 2 in the form of a cylindrical pellet from the lower face 3 from which extends an axis 5 provided, at its end, two flexible fins 6 and a curved cutting blade 8. The blade 8 has a certain flexibility in the direction of its plane of curvature, which plane of curvature extends substantially perpendicular to the plane in which fits the head 2. As shown in Figure 1, the blade 8 has a shape close to the quarter circle; its base extends substantially perpendicular to the axis 5 and it then goes up towards the plane in which the head 2 is inscribed. The end of this blade 8 extends substantially perpendicular to the plane of the head 2 and it goes up to the beyond the level of this plan.
Bien entendu dans des variantes de réalisation, la courbure de la lame 8 peut être moins accentuée.Of course in alternative embodiments, the curvature of the blade 8 can be less accentuated.
Sur la figure 4, on remarque que la lame 8 a une section sensiblement triangulaire, avec une base plane 10 et deux bordures latérales tranchantes 12. Les deux ailettes flexibles 6 s'étendent dans le plan de la lame 8, à partir d'un renflement conique 14 qui forme une pièce d'interface entre l'extrémité de l'axe 5 et la base de la lame 8 ; elles sont diamétralement opposées de part et d'autre de l'axe 5 et elles remontent légèrement vers la tête 2 pour former un Vé flexible dont l'encombrement est supérieur au diamètre dudit axe 5. La face supérieure 15 de la tête 2 comporte une extension diamétrale 16 qui constitue un organe de préhension manuel. Cette extension 16 a une forme générale semi-cylindrique dont le diamètre est légèrement supérieur à celui de la tête 2 ; tel que cela apparaît sur la figure 2, son épaisseur croît légèrement depuis la tête 2 jusqu'à sa partie supérieure pour faciliter la prise en main. Cet organe de préhension 16 s'étend dans le plan de la lame 8.In FIG. 4, it can be seen that the blade 8 has a substantially triangular section, with a flat base 10 and two sharp side edges 12. The two flexible fins 6 extend in the plane of the blade 8, starting from a conical bulge 14 which forms an interface piece between the end of the axis 5 and the base of the blade 8; they are diametrically opposite on either side of the axis 5 and they rise slightly towards the head 2 to form a flexible V whose size is greater than the diameter of said axis 5. The upper face 15 of the head 2 has a diametrical extension 16 which constitutes a manual gripping member. This extension 16 has a generally semi-cylindrical shape whose diameter is slightly greater than that of the head 2; as shown in Figure 2, its thickness increases slightly from the head 2 to its upper part to facilitate handling. This gripping member 16 extends in the plane of the blade 8.
Ce dispositif d'ouverture 1 forme une sorte de clé monobloc réalisée par moulage de matière plastique, genre polyacétale par exemple.This opening device 1 forms a kind of one-piece key made by molding plastic material, such as polyacetal for example.
Les dimensions de ses différentes parties constitutives sont adaptées pour permettre son positionnement dans un orifice aménagé dans le couvercle de l'huître, la face inférieure 3 de la tête 2 venant en appui sur ce couvercle, l'axe 5 étant placé dans ledit orifice, les ailettes 6 assurant son blocage sur ledit couvercle et la lame 8 permettant le tranchage du muscle adducteur par un mouvement de rotation au moyen de l'organe de manoeuvre externe 16. A cet effet, la tête 2 a un encombrement supérieur au diamètre de l'orifice aménagé dans le couvercle de l'huître ; l'axe 5 a un diamètre inférieur au diamètre de cet orifice et la distance qui sépare la face d'appui 3 et les ailettes flexibles 6 est légèrement supérieure à l'épaisseur du couvercle de l'huître. La première opération pour équiper une huître (figure 5) consiste à percer un orifice 18 dans son couvercle 19, de préférence au moyen d'un forêt ; on peut par exemple utiliser un forêt de diamètre 6 mm pour un axe 5 ayant un diamètre de 5,5 mm. Cet orifice 18 est réalisé à proximité du muscle adducteur 20 dont on sait qu'il se situe aux deux tiers environ de la longueur sur les huîtres creuses et à la moitié environ de la longueur sur les huîtres plates.The dimensions of its various constituent parts are adapted to allow its positioning in an orifice provided in the oyster cover, the underside 3 of the head 2 coming to bear on this cover, the axis 5 being placed in said orifice, the fins 6 ensuring its blocking on said cover and the blade 8 allowing the slicing of the adductor muscle by a rotational movement by means of the external operating member 16. For this purpose, the head 2 has a bulk greater than the diameter of the hole in the lid of the oyster; the axis 5 has a diameter less than the diameter of this orifice and the distance which separates the support face 3 and the flexible fins 6 is slightly greater than the thickness of the oyster cover. The first operation to equip an oyster (FIG. 5) consists in piercing an orifice 18 in its cover 19, preferably by means of a forest; one can for example use a forest with a diameter of 6 mm for an axis 5 having a diameter of 5.5 mm. This orifice 18 is made near the adductor muscle 20 which is known to be located about two-thirds of the length on hollow oysters and about half of the length on flat oysters.
La clé d'ouverture 1 est positionnée sur l'huître en insérant la pointe de sa lame 8 dans l'orifice 18 (figure 6), et ceci par un mouvement de rotation, en suivant sa courbure. Du fait de cette courbure et de sa souplesse, la lame 8 prend progressivement appui contre la face interne du couvercle 19 (figure 7). On force légèrement pour faire pénétrer les ailettes flexibles 6 dans l'orifice 18 ; après avoir complètement traversé ledit orifice 18, ces ailettes 6 s'écartent et l'axe 5 se trouve bloqué en position entre lesdites ailettes 6, d'un côté, et la tête 2, de l'autre, tel qu'on l'a représenté sur les figures 8 et 9.The opening key 1 is positioned on the oyster by inserting the tip of its blade 8 into the orifice 18 (FIG. 6), and this by a rotational movement, following its curvature. Because of this curvature and its flexibility, the blade 8 gradually bears against the internal face of the cover 19 (Figure 7). Light force is applied to cause the flexible fins 6 to penetrate into the orifice 18; after having completely passed through said orifice 18, these fins 6 move apart and the axis 5 is locked in position between said fins 6, on one side, and the head 2, on the other, as is shown in Figures 8 and 9.
Lors du mouvement de positionnement du dispositif d'ouverture 1 la lame 8 est presque toujours en contact avec la face interne du couvercle de l'huître, ce qui évite de blesser les chairs environnantes. D'autre part, l'appui de la lame 8 contre la face interne du couvercle favorise le maintien en position de la clé d'ouverture 1.During the positioning movement of the opening device 1, the blade 8 is almost always in contact with the internal face of the oyster lid, which avoids injuring the surrounding flesh. On the other hand, pressing the blade 8 against the internal face of the cover promotes the maintenance in position of the opening key 1.
L'ouverture de l'huître s'effectue ensuite de façon très simple en faisant tourner l'organe de manoeuvre 16 sur lui-même pour entraîner la lame 8 en rotation (figure 10). Le bord tranchant 12 de la lame permet de sectionner le muscle adducteur 20 sans difficulté et le couvercle 19 libéré peut alors être enlevé très facilement par simple traction.The oyster is then opened very simply by rotating the operating member 16 on itself to drive the blade 8 in rotation (FIG. 10). The cutting edge 12 of the blade makes it possible to cut the adductor muscle 20 without difficulty and the released cover 19 can then be removed very easily by simple traction.
Comme la lame 8 est en appui contre la face interne du couvercle 19, elle peut donc sectionner le muscle 20 dans sa zone de fixation sur ledit couvercle. Cela permet de limiter la quantité de chair restant accolée au couvercle et on optimise ainsi la qualité d'ouverture. Bien entendu, pour obtenir un sectionnement complet du muscle adducteur 20, on veillera à positionner l'orifice 18 à une distance de ce muscle 20 inférieure à la longueur de la lame 8. On notera encore que la présence des deux bordures tranchantes 12 de la lame 8 permet d'imprimer le mouvement de rotation pour l'ouverture dans n'importe quel sens. Cette particularité s'avère intéressante lorsqu'il est nécessaire d'utiliser plusieurs coups de lame pour trancher le muscle, alors que le bord de l'huître empêche cette lame d'effectuer un tour complet sur elle- même.As the blade 8 is in abutment against the internal face of the cover 19, it can therefore cut the muscle 20 in its area of attachment to said cover. This makes it possible to limit the amount of flesh remaining attached to the lid and this optimizes the quality of opening. Of course, to obtain complete cutting of the adductor muscle 20, care should be taken to position the orifice 18 at a distance from this muscle 20 less than the length of the blade 8. It will also be noted that the presence of the two sharp edges 12 of the blade 8 makes it possible to print the rotational movement for opening in any direction. This feature is interesting when it is necessary to use several blades to cut the muscle, while the edge of the oyster prevents this blade from making a full turn on itself.
L'opération de sectionnement du muscle de l'huître peut être réalisée juste après le positionnement de la clé d'ouverture 1. De préférence tout de même, la pose de cette clé sera réalisée par l'ostréiculteur lors du conditionnement des huîtres, ou avant, ou bien directement sur l'étal du poissonnier, alors que l'opération d'ouverture proprement dite sera réalisée par le consommateur.The operation of sectioning the oyster muscle can be carried out just after positioning the opening key 1. Preferably all the same, the laying of this key will be carried out by the oyster farmer during the packaging of the oysters, or before, or directly on the fishmonger's stall, while the actual opening operation will be carried out by the consumer.
On remarque que le dispositif d'ouverture décrit sur les figures 1 à 10 ne constitue pas un bouchon permettant d'obturer de façon étanche l'orifice 18 aménagé dans le couvercle de l'huître. Malgré cela, on peut tout-à-fait envisager d'équiper le couvercle des huîtres, puis de remettre celles-ci en culture ou dans des bassins d'attente pendant plusieurs jours, voire même plusieurs semaines, sans constater de conséquences néfastes sur la survie des mollusques, ni d'altération particulière de leurs qualités gustatives, organoleptiques et microbiologiques.Note that the opening device described in Figures 1 to 10 does not constitute a plug for sealingly sealing the orifice 18 provided in the lid of the oyster. Despite this, it is entirely conceivable to equip the lid with oysters, then put them back in culture or in waiting tanks for several days, or even several weeks, without seeing any harmful consequences on the survival of molluscs, nor any particular alteration in their taste, organoleptic and microbiological qualities.
Tel qu'on l'a représenté en pointillés sur la figure 9, une étiquette publicitaire ou informative 22 peut être enfilée sur l'axe 5 de la clé d'ouverture 1 par l'intermédiaire d'un orifice approprié ; après la pose de cette clé, l'étiquette 22 se trouve bloquée entre la tête 2 et le couvercle de l'huître. L'organe de manoeuvre 16 peut aussi être prévu repliable contre la têteAs shown in dotted lines in FIG. 9, an advertising or informative label 22 can be threaded on the axis 5 of the opening key 1 via an appropriate orifice; after the installation of this key, the label 22 is blocked between the head 2 and the oyster cover. The operating member 16 can also be provided foldable against the head
2, par exemple en aménageant une zone de faiblesse (illustrée en 24 sur la figure 2) au niveau de sa base.2, for example by arranging a zone of weakness (illustrated at 24 in FIG. 2) at its base.
Les figures 11 et 12 illustrent une variante de réalisation du dispositif d'ouverture 1 ' conforme à la présente invention. Dans ce mode de réalisation, on aperçoit la tête 2' en forme de pastille cylindrique sur la face supérieure de laquelle on trouve un organe de manoeuvre externe 16' et à partir de la face inférieure de laquelle s'étend un axe 5' muni à son extrémité d'une lame tranchante recourbée 8'.Figures 11 and 12 illustrate an alternative embodiment of the opening device 1 'according to the present invention. In this embodiment, we see the head 2 'in the form of a cylindrical patch on the upper face of which there is an external operating member 16' and from the face lower of which extends an axis 5 'provided at its end with a curved cutting blade 8'.
Entre l'axe 5' et la lame 8' on remarque la présence d'un renflement 26 associé à une fente de flexibilité 28. Cette fente 28 est positionnée derrière la base de la lame 8' ; elle s'étend sur toute la hauteur du renflement 26 et sur un peu plus de la moitié de la hauteur de l'axe 5'.Between the axis 5 'and the blade 8' we notice the presence of a bulge 26 associated with a flexibility slot 28. This slot 28 is positioned behind the base of the blade 8 '; it extends over the entire height of the bulge 26 and over a little more than half the height of the axis 5 '.
La fente 28 permet le passage en force du renflement 26 à travers l'orifice 18 aménagé dans le couvercle de l'huître ; et ce renflement 26 assure ensuite le verrouillage du dispositif sur le couvercle du coquillage. Comme pour le mode de réalisation illustré sur les figures 1 à 10, la lame 8' comporte deux bordures latérales tranchantes.The slot 28 allows the bulge 26 to pass by force through the orifice 18 arranged in the oyster cover; and this bulge 26 then ensures the locking of the device on the shell cover. As for the embodiment illustrated in Figures 1 to 10, the blade 8 'has two sharp side edges.
Dans ce mode de réalisation, on remarque que l'organe de préhension et de manoeuvre 16' déborde sur les côtés de la tête 2' ; cette particularité permet d'augmenter l'effet de prise du dispositif en vue de faciliter sa pose et d'optimiser les opérations de tranchage du muscle adducteur.In this embodiment, it is noted that the gripping and maneuvering member 16 ′ extends beyond the sides of the head 2 ′; this feature makes it possible to increase the grip effect of the device in order to facilitate its installation and to optimize the operations of slicing the adductor muscle.
Sur les deux modes de réalisation illustrés la tête 2, 2' du dispositif d'ouverture est en forme de pastille cylindrique ; bien entendu toute autre forme peut être envisagée. In the two embodiments illustrated, the head 2, 2 ′ of the opening device is in the form of a cylindrical patch; of course any other form can be envisaged.

Claims

- REVENDICATIONS - 1.- Dispositif pour ouvrir une huître après avoir aménagé un orifice (18) dans son couvercle (19), à proximité du muscle adducteur (20) qui retient ses deux valves, lequel dispositif (1 , 1 ') est constitué d'une lame tranchante (8, 8') prolongée par un organe de manoeuvre (16, 16'), laquelle lame (8, 8') introduite dans le corps de l'huître par ledit orifice (18) est apte à trancher ledit muscle (20) par une opération de rotation exercée au moyen de l'organe de manoeuvre (16, 16'), caractérisé en ce qu'il comporte une lame (8, 8') en forme d'arc de cercle disposant d'une certaine souplesse dans son plan de courbure et munie d'au moins une bordure tranchante latérale (12).- CLAIMS - 1.- Device for opening an oyster after having fitted an orifice (18) in its cover (19), near the adductor muscle (20) which retains its two valves, which device (1, 1 ') is made up a sharp blade (8, 8 ') extended by an operating member (16, 16'), which blade (8, 8 ') introduced into the oyster body through said orifice (18) is capable of slicing said muscle (20) by a rotation operation exerted by means of the operating member (16, 16 '), characterized in that it comprises a blade (8, 8') in the form of an arc of a circle having 'a certain flexibility in its plane of curvature and provided with at least one sharp side edge (12).
2.- Dispositif selon la revendication 1 , caractérisé en ce qu'il comporte une tête (2, 2') dont les dimensions sont supérieures à celles de l'orifice (18) aménagé dans le couvercle (19) de l'huître, munie d'une face inférieure (3) destinée à venir en appui contre la face externe dudit couvercle (19), laquelle tête (2, 2') se prolonge à partir de ladite face d'appui (3) par un axe (5, 5') dont les dimensions sont inférieures à celles dudit orifice (18) pour permettre son introduction dans celui-ci, lequel axe (5, 5') comporte à son extrémité la lame en forme d'arc souple (8, 8') qui remonte en direction du plan de ladite face d'appui (3). 2.- Device according to claim 1, characterized in that it comprises a head (2, 2 ') whose dimensions are greater than those of the orifice (18) arranged in the cover (19) of the oyster, provided with a lower face (3) intended to come into abutment against the external face of said cover (19), which head (2, 2 ') is extended from said bearing face (3) by an axis (5 , 5 ') whose dimensions are smaller than those of said orifice (18) to allow its introduction therein, which axis (5, 5') comprises at its end the blade in the form of a flexible arc (8, 8 ' ) which rises in the direction of the plane of said bearing face (3).
3.- Dispositif selon la revendication 2, caractérisé en ce que l'axe (5, 5') support de la lame souple (8, 8') a une longueur légèrement supérieure à l'épaisseur du couvercle (19) de l'huître et en ce que ladite lame (8, 8') remonte, au repos, au-delà d'un plan correspondant à la face interne dudit couvercle (19) de telle sorte que la lame souple (8, 8') vienne en appui contre ladite face interne du couvercle (19), lorsque la tête (2, 2') est en appui contre sa face externe.3.- Device according to claim 2, characterized in that the axis (5, 5 ') support of the flexible blade (8, 8') has a length slightly greater than the thickness of the cover (19) of the oyster and in that said blade (8, 8 ') rises, at rest, beyond a plane corresponding to the internal face of said cover (19) so that the flexible blade (8, 8') comes in pressing against said internal face of the cover (19), when the head (2, 2 ') is pressing against its external face.
4.- Dispositif selon l'une quelconque des revendications 2 ou 3, caractérisé en ce qu'il comporte une lame souple (8, 8') en forme de quart de cercle dont la base s'étend sensiblement perpendiculairement à son axe support (5, 5') et dont l'extrémité remonte, au repos, au-delà de la face d'appui (3) de la tête (2, 2'). 4.- Device according to any one of claims 2 or 3, characterized in that it comprises a flexible blade (8, 8 ') in the form of a quarter of a circle whose base extends substantially perpendicularly to its support axis ( 5, 5 ') and the end of which rises, at rest, beyond the bearing face (3) of the head (2, 2').
5.- Dispositif selon l'une quelconque des revendications 2 à 4, caractérisé en ce qu'il comporte au moins une ailette flexible (6) aménagée dans la partie inférieure de l'axe (5) pour assurer son maintien en position sur l'huître après introduction dudit axe (5) dans l'orifice de réception (18). 5.- Device according to any one of claims 2 to 4, characterized in that it comprises at least one flexible fin (6) arranged in the lower part of the axis (5) to ensure its maintenance in position on the oyster after introduction of said axis (5) in the receiving orifice (18).
6.- Dispositif selon la revendication 5, caractérisé en ce qu'il comporte deux ailettes flexibles (6) disposées dans le plan de la lame flexible (8).6.- Device according to claim 5, characterized in that it comprises two flexible fins (6) arranged in the plane of the flexible blade (8).
7.- Dispositif selon l'une quelconque des revendications 2 à 4, caractérisé en ce qu'il comporte un renflement de verrouillage (26) aménagé dans la partie inférieure de l'axe (5'), associé à une fente de flexibilité (28), pour assurer son maintien en position sur l'huître après introduction dudit axe (5') dans l'orifice de réception (18).7.- Device according to any one of claims 2 to 4, characterized in that it comprises a locking bulge (26) arranged in the lower part of the axis (5 '), associated with a flexibility slot ( 28), to ensure that it remains in position on the oyster after introduction of said axis (5 ′) into the receiving orifice (18).
8.- Dispositif selon l'une quelconque des revendications 2 à 7, caractérisé en ce qu'il comporte une tête (2, 2') en forme de pastille plate qui se prolonge par un organe de préhension manuel (16, 16') s'étendant dans un plan perpendiculaire à ladite tête (2, 2') et permettant d'imprimer le mouvement de rotation de la lame (8, 8') pour assurer le tranchage du muscle (20).8.- Device according to any one of claims 2 to 7, characterized in that it comprises a head (2, 2 ') in the form of a flat pellet which is extended by a manual gripping member (16, 16') extending in a plane perpendicular to said head (2, 2 ') and making it possible to impart the rotational movement of the blade (8, 8') to ensure the cutting of the muscle (20).
9.- Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comporte une lame (8, 8') munie de deux bordures latérales tranchantes (12). 9.- Device according to any one of claims 1 to 8, characterized in that it comprises a blade (8, 8 ') provided with two sharp side edges (12).
10.- Dispositif selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il est réalisé de façon monobloc par moulage de matière plastique.10.- Device according to any one of claims 1 to 9, characterized in that it is made in one piece by molding of plastic material.
11.- Huître à ouverture facilitée équipée d'un dispositif selon l'une quelconque des revendications 1 à 10. 11.- Easy opening oyster equipped with a device according to any one of claims 1 to 10.
12.- Huître selon la revendication 11 , caractérisée en ce qu'elle comporte une étiquette informative et/ou publicitaire (22) munie d'un orifice qui permet son enfilage sur l'axe (5, 5') du dispositif d'ouverture (1 , l') et qui est positionnée entre la tête (2, 2') dudit dispositif et le couvercle (19) de l'huître. 12.- oyster according to claim 11, characterized in that it comprises an informative and / or advertising label (22) provided with an orifice which allows its threading on the axis (5, 5 ') of the opening device (1, l ') and which is positioned between the head (2, 2') of said device and the cover (19) of the oyster.
PCT/FR1999/001563 1998-06-30 1999-06-29 Oyster opening device WO2000000067A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43764/99A AU4376499A (en) 1998-06-30 1999-06-29 Oyster opening device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9808494A FR2780260B1 (en) 1998-06-30 1998-06-30 DEVICE FOR OPENING OYSTERS
FR98/08494 1998-06-30

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WO2000000067A1 true WO2000000067A1 (en) 2000-01-06

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FR (1) FR2780260B1 (en)
WO (1) WO2000000067A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2831412B1 (en) * 2001-10-26 2004-02-20 Daniel Mauduit TOOL FOR OPENING BIVALVES AND METHOD FOR ITS IMPLEMENTATION

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1194003A (en) 1958-03-28 1959-11-06 Method and apparatus for opening oysters
FR2739539A1 (en) 1995-10-10 1997-04-11 Boullier Edith Rod to open shellfish inserted into shell, e.g. oysters
FR2745484A1 (en) 1996-03-04 1997-09-05 Daubin Bernard Device for easy opening of oyster shells
FR2754694A1 (en) * 1996-10-23 1998-04-24 Sarl Ostraquick PROCESS FOR TREATING TWO-VALVE SHELLS TO FACILITATE THEIR OPENING

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1194003A (en) 1958-03-28 1959-11-06 Method and apparatus for opening oysters
FR2739539A1 (en) 1995-10-10 1997-04-11 Boullier Edith Rod to open shellfish inserted into shell, e.g. oysters
FR2745484A1 (en) 1996-03-04 1997-09-05 Daubin Bernard Device for easy opening of oyster shells
FR2754694A1 (en) * 1996-10-23 1998-04-24 Sarl Ostraquick PROCESS FOR TREATING TWO-VALVE SHELLS TO FACILITATE THEIR OPENING

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AU4376499A (en) 2000-01-17
FR2780260A1 (en) 1999-12-31
FR2780260B1 (en) 2000-09-15

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