EP0997647A1 - Vérin à dispositif élastique de rappel d'un ensemble de piston de travail en position neutre - Google Patents
Vérin à dispositif élastique de rappel d'un ensemble de piston de travail en position neutre Download PDFInfo
- Publication number
- EP0997647A1 EP0997647A1 EP99402644A EP99402644A EP0997647A1 EP 0997647 A1 EP0997647 A1 EP 0997647A1 EP 99402644 A EP99402644 A EP 99402644A EP 99402644 A EP99402644 A EP 99402644A EP 0997647 A1 EP0997647 A1 EP 0997647A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- working
- chamber
- auxiliary
- piston
- pistons
- 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.)
- Granted
Links
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1438—Cylinder to end cap assemblies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
- F15B11/036—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force by means of servomotors having a plurality of working chambers
- F15B11/0365—Tandem constructions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
- F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
- F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7055—Linear output members having more than two chambers
- F15B2211/7056—Tandem cylinders
Definitions
- the present invention relates to a device cylinder elastic return of a working piston assembly in neutral position, this working piston assembly being fixed on a working rod and mounted sliding in minus a working chamber, between a rest position and a working position, said neutral position possibly being intermediate between the previous two or confused with the rest position.
- This cylinder may be hydraulic or pneumatic depending on the applications and the importance of work efforts to get.
- the working rod can be connected to any kind of tools, for example pliers with articulated arms or jaws in X or C and provided with spot welding electrodes.
- the parts to be welded can be fixed relative to the ground, the welding clamp being transported by the manipulator.
- a welding gun of this type is described by example in French patent application n ° 98.08752 au name of the plaintiff and to whom we can refer for more details.
- the tightening of the electrodes on the parts to be welded, corresponding to the working position mentioned above, takes place in principle after a tool approach precourse consisting of a large opening for the first assembly to be carried out (large opening which can be considered as corresponding to the rest position mentioned above) and a positioning in neutral position, for example a position intermediate for subsequent assemblies.
- the constraints related to the welding range require work with a three-position cylinder allowing a large opening (so-called “rest” position) of the jaw especially when engaging and removing the arms of the tool relative to the parts to be welded, of a closure towards a neutral or intermediate point when approaching arms towards the welding point, and a closure with large effort during the welding cycle (so-called "de work ").
- the neutral or intermediate position must be able be used as a small opening avoiding reopening complete of the clamp.
- Such a mechanical recall design has disadvantage of relating the welding effort to the number of pistons installed, with their sections and with the coefficient of spring return in neutral or intermediate position. The higher the recall coefficients, the greater positioning speed at neutral or intermediate point, but the lower the clamping force, and the less great is the opening speed and vice versa.
- control elements and their logic associated are all the more multiplied and complex as there has chambers to pressurize or to exhaust, hence a multiplication of control cables, complexity of the control logic and weighting of the clamp, which removes the portable nature of this tool.
- a cylinder according to the present invention is characterized in that the elastic device of recall of said working piston assembly in position neutral or intermediate is pneumatic and implements an auxiliary piston assembly of relatively small section, sliding mounted in an auxiliary chamber with pneumatic supply independent of that which operates said working piston assembly.
- said elastic device comprises at least one auxiliary piston assembly connected to said working piston assembly and slidably mounted in a auxiliary chamber, this auxiliary piston assembly being suitable for being moved, in said auxiliary chamber, in one way or the other by said piston assembly of work when it moves between its position of rest and its working position or vice versa, and at elastically compressing a gas in said chamber auxiliary, so as to be able to resiliently recall said working piston assembly in said neutral position or intermediate.
- the invention can be use with a "working piston assembly” consisting of one or more working pistons, depending of the desired work effort during tightening.
- the piston assembly auxiliary “of the elastic device may include one or several auxiliary pistons, located between the two pistons of work and able to bring these in a neutral position or small opening intermediate between wide opening position and clamping position welding tongs.
- the jack for example pneumatic, shown in Figures 1 and 2, comprises a working rod in two sections 1 a - 1 b , fixed by any suitable means, for example by screwing at the end, on a working piston 2 equipped with an O-ring seal 3 and suitable for sliding in a cylinder 4 passing through compressed air supply passages 5 and 7, and exhaust 6.
- the ends of the cylinder are closed by two screw caps: a plug 8 provided with a vent hole 9, and a stopper 10 having a central bore is provided with an O-ring 11 for the sealed passage of the section 1a of the working rod, which protrudes outside for actuation of any tool.
- the working piston 2 thus divides the working chamber of the cylinder 4 into two compartments: a compartment 12 in connection with the passage 5 and formed between the piston 2 and a fixed mount 14 of the cylinder, and a compartment 13 (FIG. 1 ) in connection with the exhaust passage 6 and formed between the piston 2 and a stop circlip 15.
- This cylinder further comprises an auxiliary piston 16 fixed at the end, by a stud 17, on the section 1b of the working rod and mounted to slide in a chamber 18 of the frame 14, the latter comprising a lateral passage 19 allowing it to be placed in permanent communication with the aforementioned passage 7 of the cylinder 4 cylinder.
- the mount 14 is fitted with O-rings 20 and 21 for sealing respectively at the internal wall of the cylinder 4 and at the section 1b of the rod working, as the auxiliary piston 16 is equipped with O-rings 22 and 23 to achieve the seal respectively at the inner wall of the chamber 18 and at the section 1b of the working rod.
- a circlip 24 serves to limit the movement to the left of the auxiliary piston 16 in the chamber 18.
- the pressure in the chamber 18 causes the piston 16, the working rod 1 to -1 b and therefore the working piston 2 to return to the left until the in the rest position of Figure 1.
- the permanent air pressure in the chamber 18 therefore constitutes for the working piston 2 a pneumatic return spring.
- the pneumatic cylinder shown in FIGS. 3 to 5 comprises two working pistons 26 and 27 secured to each other by a working rod 28 profiled for this purpose, and mounted sliding in the ends 29 and 30 of a body of cylindrical cylinder 31, the seal being provided by annular lip seals, respectively 26 a and 27 a , 27 b .
- These ends 29 and 30 of the body 31 are closed by a plug 32 with an exhaust hole 33 and by a plug 34 crossed by the rod 28.
- a bore or chamber 35 in the central part 36 of the cylinder body and on the rod 28 are slidably mounted two return pistons 37 and 38 of smaller section than the previous ones, which can bear respectively on the central part of the pistons 26 and 27.
- the chamber 39 located at right of the piston 27 can be connected with a source of pressurized air or with atmospheric air by a pipe 40, and with the chamber 41 located to the right of the piston 26 by an axial passage 42 of the rod 28, passage opening laterally into these chambers 39 and 41, at its ends.
- the chamber 43 separated from the chamber 39 by the piston 27 can likewise be connected to a source of pressurized air or to atmospheric air by an elbow passage 44 passing through the central part 36 of the body 31 of the jack.
- the chamber 45 separated from the chamber 41 by the piston 26 is brought to atmospheric pressure through the hole 33, and the chamber formed by the bore 35 between the pistons 37 and 38 can be placed in permanent communication with a source d pressurized air through a pipe opening into this chamber through an orifice 46.
- the chamber 43 is then exhausted by the passage 44, and the overpressure in the chamber 35 brings the piston 37 in its initial position, as well as the pistons 26 and 27 and the rod 28 in their initial position intermediate, corresponding to the small opening of the welding tongs (figure 3).
- Chamber 43 remains in the open air, the air under pressure is then brought through line 40 into the chamber 39 and by the axial passage 42 in the chamber 41, which causes the pistons 26 and 27 and the rod to move 28 to the left, to a working position corresponding to the tightening of the welding electrodes on the piece with the desired effort.
- the invention makes it possible to obtain this result with a independence of the compressed air sources that are connected on the pipe 40 and the bent passage 44 on the one hand, and on the orifice 46 on the other hand, the chamber 35 to be subjected at permanent pressure, which is not the case for rooms 39, 41 and 43.
- the control logic can therefore be simplified.
- the pneumatic return device does not has a low inertia, in a cylinder allowing however to obtain a very significant clamping force while being of reduced length and weight compared to a three-position cylinder which would allow effort equivalent clamping.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Actuator (AREA)
- Gear-Shifting Mechanisms (AREA)
- Mechanical Control Devices (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Vehicle Body Suspensions (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
Description
- les figures 1 et 2 sont des vues en coupe axiale d'un vérin à rappel pneumatique conforme à l'invention, respectivement dans l'une et l'autre de deux de ses positions de fonctionnement ; et
- les figures 3 à 5 montrent en coupe axiale un autre vérin à rappel pneumatique conforme à l'invention, dont le fonctionnement implique le passage par trois positions : de repos, intermédiaire et de travail, par exemple pour l'actionnement d'une pince de soudage à trois positions : respectivement grande ouverture (figure 4), petite ouverture (figure 3) et de serrage (figure 5) sur les tôles à souder.
Claims (9)
- Vérin à dispositif élastique de rappel d'un ensemble de piston de travail (2) en position neutre, cet ensemble de piston de travail (2) étant fixé sur une tige de travail (1a, 1b) et monté coulissant, dans au moins une chambre de travail (12, 13), entre une position de repos (fig. 1) et une position de travail (fig. 2), ladite position neutre pouvant être intermédiaire entre les deux précédentes, caractérisé en ce que le dispositif élastique de rappel dudit ensemble de piston de travail (2) en position neutre ou intermédiaire est de type pneumatique et met en oeuvre un ensemble de piston auxiliaire de relativement petite section, monté coulissant dans une chambre auxiliaire à alimentation pneumatique indépendante de celle qui actionne ledit ensemble de piston de travail.
- Vérin selon la revendication 1, caractérisé en ce que ledit dispositif élastique comporte au moins un ensemble de piston auxiliaire (16) relié audit ensemble de piston de travail (2) et monté coulissant dans une chambre auxiliaire (18), cet ensemble de piston auxiliaire (16) étant propre à être déplacé, dans ladite chambre auxiliaire (18), dans un sens ou dans l'autre par ledit ensemble de piston de travail (2) lorsque celui-ci se déplace entre sa position de repos (fig. 1) et sa position de travail (fig. 2) ou inversement, et à comprimer élastiquement un gaz dans ladite chambre auxiliaire (18), de sorte à pouvoir rappeler élastiquement ledit ensemble de piston de travail (2) dans ladite position neutre, à savoir ladite position de repos ou ladite position intermédiaire.
- Vérin selon la revendication 1 ou 2, caractérisé en ce que ledit ensemble de piston de travail comporte deux pistons de travail (26, 27) fixés sur une tige de travail commune (28), et en ce qu'entre les deux pistons de travail il comporte un ensemble de piston auxiliaire (37, 38) monté coulissant, d'une part sur ladite tige de travail (28), d'autre part dans une chambre auxiliaire (35) d'une partie centrale (36) d'un cylindre de vérin, cette chambre auxiliaire (35) étant soumise en permanence à une pression pneumatique.
- Vérin selon la revendication 3, caractérisé en ce que ledit ensemble de piston auxiliaire comporte deux pistons auxiliaires (37, 38) propres à faire saillie aux deux extrémités opposées d'une chambre auxiliaire (35) traversant de part en part ladite partie centrale (36) du cylindre de vérin, pour pouvoir prendre appui respectivement sur l'un et l'autre desdits deux pistons de travail (26, 27) lorsque ceux-ci occupent ladite position neutre ou intermédiaire.
- Vérin selon la revendication 3 ou 4, caractérisé en ce que les déplacements desdits pistons auxiliaires (37, 38) vers les extrémités respectives de la chambre auxiliaire (35) sont limités par des butées respectives (b2, b1).
- Vérin selon l'une quelconque des revendications 3 à 5, caractérisé en ce que ladite partie centrale (36) du cylindre de vérin est traversée par un passage (44) propre à mettre en communication avec une source de fluide sous pression, ou à mettre à l'échappement, une première chambre de travail (43) délimitée par un piston de travail (27), la chambre de travail opposée (39) délimitée par le même piston (27) de travail pouvant également être mise en communication avec une source de fluide sous pression ou être mise à l'échappement par une autre conduite (40).
- Vérin selon la revendication 6, caractérisé en ce que ladite chambre de travail opposée (39) communique avec une autre chambre de travail (41) délimitée par l'autre piston de travail (26) grâce à un passage axial (42) de ladite tige de travail (28), la chambre (45) opposée à la précédente par rapport audit autre piston de travail (26) étant à la pression extérieure.
- Vérin selon les revendications 3 à 7, caractérisé en ce qu'il est utilisé pour la manoeuvre d'une pince de soudage devant occuper une position neutre ou de petite ouverture, intermédiaire entre une position de grande ouverture et une position de serrage sur les pièces à souder.
- Vérin selon la revendication 8, caractérisé par les phases de fonctionnement suivantes :mise en pression de ladite première chambre de travail (43) pour le déplacement desdits pistons de travail (26, 27) et de la tige de travail (28) de ladite position neutre ou intermédiaire de petite ouverture (figure 3) à ladite position de grande ouverture (figure 4) de la pince, le gaz sous pression dans ladite chambre intermédiaire (35) étant alors comprimé par un premier piston auxiliaire (37) tandis que le second piston auxiliaire (38) reste en appui sur une butée (b1) ;mise à l'échappement de ladite première chambre de travail (43) et retour desdits pistons de travail (26, 27) et de la tige de travail (28) de ladite position de grande ouverture (figure 4) à ladite position neutre ou intermédiaire de petite ouverture (figure 3) sous l'action dudit premier piston auxiliaire (37), lui-même sous l'effet de la pression dans ladite chambre auxiliaire (35), ledit premier piston auxiliaire (37) restant en appui sur ledit autre piston de travail (26) jusqu'à son arrivée en arrêt sur une butée (b2) ;mise en pression de ladite chambre de travail opposée (39) et de ladite autre chambre de travail (41) pour le déplacement desdits pistons de travail (26, 27) et de la tige de travail (28) de ladite position neutre ou intermédiaire (figure 3) à ladite position de serrage de la pince (figure 5), le gaz sous pression dans ladite chambre intermédiaire (35) étant alors comprimé par ledit second piston auxiliaire (38) tandis que le premier piston auxiliaire (37) reste en appui sur ladite butée (b2) ;mise à l'échappement de ladite chambre de travail opposée (39) et de ladite autre chambre de travail (41) et retour desdits pistons de travail (26, 27) et de la tige de travail (28) de ladite position de serrage (figure 5) de la pince à ladite position neutre ou intermédiaire de petite ouverture (figure 3) sous l'action dudit second piston auxiliaire (38), lui-même sous l'effet de la pression dans ladite chambre auxiliaire (35), ledit second piston auxiliaire (38) restant en appui sur ledit piston de travail (27) jusqu'à son arrivée en arrêt sur ladite butée (b1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9813509 | 1998-10-28 | ||
FR9813509A FR2785338B1 (fr) | 1998-10-28 | 1998-10-28 | Verin a dispositif elastique de rappel d'un ensemble de piston de travail en position neutre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0997647A1 true EP0997647A1 (fr) | 2000-05-03 |
EP0997647B1 EP0997647B1 (fr) | 2004-03-03 |
Family
ID=9532084
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99402644A Expired - Lifetime EP0997647B1 (fr) | 1998-10-28 | 1999-10-25 | Vérin à dispositif élastique de rappel d'un ensemble de piston de travail en position neutre |
Country Status (7)
Country | Link |
---|---|
US (1) | US6283011B1 (fr) |
EP (1) | EP0997647B1 (fr) |
JP (1) | JP2000130584A (fr) |
AT (1) | ATE261067T1 (fr) |
DE (1) | DE69915208T2 (fr) |
ES (1) | ES2217707T3 (fr) |
FR (1) | FR2785338B1 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1163979A1 (fr) * | 2000-06-14 | 2001-12-19 | Hans Oetiker AG Maschinen- und Apparatefabrik | Pince de précision pneumatique |
EP2813735A1 (fr) * | 2013-06-12 | 2014-12-17 | Koganei Corporation | Cylindre de pression de fluide |
WO2022124896A3 (fr) * | 2020-12-08 | 2022-09-15 | V.S.E. Vehicle Systems Engineering B.V. | Cylindre et ses procédés de fonctionnement |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1162046A3 (fr) * | 2000-06-09 | 2003-03-26 | Max Co., Ltd. | Machine pour la coupe le long des axes X et Y |
JP2004353134A (ja) | 2003-05-30 | 2004-12-16 | Murata Mach Ltd | 幅広ヤーンによるブレイディング組成基材及びその製造方法 |
US9003953B2 (en) * | 2011-09-14 | 2015-04-14 | Schlumberger Technology Corporation | Lockable hydraulic actuator |
US9803660B1 (en) * | 2014-02-04 | 2017-10-31 | Danfoss Power Solutions Inc. | Low friction compact servo piston assembly |
JP7495755B2 (ja) * | 2019-12-05 | 2024-06-05 | ダドコ インコーポレイテッド | 空気圧シリンダ |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2112065A1 (fr) * | 1970-09-08 | 1972-06-16 | Gournelle Paul | |
US3752161A (en) * | 1971-08-02 | 1973-08-14 | Minnesota Mining & Mfg | Fluid operated surgical tool |
US5125326A (en) * | 1991-01-29 | 1992-06-30 | Rockwell International Corporation | Three position actuator having a neutral normal position for shifting a two speed transfer case |
FR2673983A1 (fr) * | 1991-03-14 | 1992-09-18 | Festo Kg | Ensemble piston-cylindre. |
FR2721359A1 (fr) * | 1994-06-15 | 1995-12-22 | Libervit | Procédé et dispositif de commande et d'alimentation de vérin de manÓoeuvre d'outils hydrauliques. |
EP0926354A2 (fr) * | 1997-12-16 | 1999-06-30 | Smc Corporation | Soupape électromagnétique à trois positions actionnée par pression de pilote |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US380375A (en) * | 1888-04-03 | willans | ||
US1786474A (en) * | 1928-08-15 | 1930-12-30 | New York Air Brake Co | Pump-regulating valve |
US2092580A (en) * | 1935-11-16 | 1937-09-07 | Yellow Truck And Coach Mfg Com | Gear shift damper |
US3672402A (en) * | 1970-09-14 | 1972-06-27 | Eaton Yale & Towne | Automatic precharge adjuster |
US4226167A (en) * | 1978-05-17 | 1980-10-07 | Lew Yon S | Air-spring return air cylinder |
DE19511929C1 (de) | 1995-03-31 | 1996-05-23 | Weidtmann Wilhelm Kg | Dreh- und/oder Kipp-Beschlag für Fenster, Türen od. dgl. mit einem zwischen dem Flügel und dem Rahmen angeordneten Flügelheber |
FR2756863B1 (fr) | 1996-12-06 | 1999-01-22 | Ferco Int Usine Ferrures | Dispositif de securite de type antifausse manoeuvre pour une ferrure de verrouillage d'un vantail |
-
1998
- 1998-10-28 FR FR9813509A patent/FR2785338B1/fr not_active Expired - Fee Related
-
1999
- 1999-10-19 US US09/421,764 patent/US6283011B1/en not_active Expired - Fee Related
- 1999-10-25 ES ES99402644T patent/ES2217707T3/es not_active Expired - Lifetime
- 1999-10-25 EP EP99402644A patent/EP0997647B1/fr not_active Expired - Lifetime
- 1999-10-25 DE DE69915208T patent/DE69915208T2/de not_active Expired - Fee Related
- 1999-10-25 AT AT99402644T patent/ATE261067T1/de not_active IP Right Cessation
- 1999-10-28 JP JP11307068A patent/JP2000130584A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2112065A1 (fr) * | 1970-09-08 | 1972-06-16 | Gournelle Paul | |
US3752161A (en) * | 1971-08-02 | 1973-08-14 | Minnesota Mining & Mfg | Fluid operated surgical tool |
US5125326A (en) * | 1991-01-29 | 1992-06-30 | Rockwell International Corporation | Three position actuator having a neutral normal position for shifting a two speed transfer case |
FR2673983A1 (fr) * | 1991-03-14 | 1992-09-18 | Festo Kg | Ensemble piston-cylindre. |
FR2721359A1 (fr) * | 1994-06-15 | 1995-12-22 | Libervit | Procédé et dispositif de commande et d'alimentation de vérin de manÓoeuvre d'outils hydrauliques. |
EP0926354A2 (fr) * | 1997-12-16 | 1999-06-30 | Smc Corporation | Soupape électromagnétique à trois positions actionnée par pression de pilote |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1163979A1 (fr) * | 2000-06-14 | 2001-12-19 | Hans Oetiker AG Maschinen- und Apparatefabrik | Pince de précision pneumatique |
WO2001096071A1 (fr) * | 2000-06-14 | 2001-12-20 | Hans Oetiker Ag Maschinen- Und Apparatefabrik | Pince de precision pneumatique |
US7107814B2 (en) | 2000-06-14 | 2006-09-19 | Hans Oetiker Ag, Maschinen Und Apparatefabrik | Pneumatic precision pliers |
EP2813735A1 (fr) * | 2013-06-12 | 2014-12-17 | Koganei Corporation | Cylindre de pression de fluide |
US9512860B2 (en) | 2013-06-12 | 2016-12-06 | Koganei Corporation | Fluid pressure cylinder |
WO2022124896A3 (fr) * | 2020-12-08 | 2022-09-15 | V.S.E. Vehicle Systems Engineering B.V. | Cylindre et ses procédés de fonctionnement |
Also Published As
Publication number | Publication date |
---|---|
FR2785338B1 (fr) | 2001-08-10 |
JP2000130584A (ja) | 2000-05-12 |
DE69915208T2 (de) | 2005-02-17 |
ES2217707T3 (es) | 2004-11-01 |
US6283011B1 (en) | 2001-09-04 |
ATE261067T1 (de) | 2004-03-15 |
DE69915208D1 (de) | 2004-04-08 |
FR2785338A1 (fr) | 2000-05-05 |
EP0997647B1 (fr) | 2004-03-03 |
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Publication | Publication Date | Title |
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