EP1312810B1 - Kolben/Zylinder-Einheit mit einer Drehsicherung zwichen Kolben und Kolbenstange - Google Patents
Kolben/Zylinder-Einheit mit einer Drehsicherung zwichen Kolben und Kolbenstange Download PDFInfo
- Publication number
- EP1312810B1 EP1312810B1 EP02023850A EP02023850A EP1312810B1 EP 1312810 B1 EP1312810 B1 EP 1312810B1 EP 02023850 A EP02023850 A EP 02023850A EP 02023850 A EP02023850 A EP 02023850A EP 1312810 B1 EP1312810 B1 EP 1312810B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- piston rod
- cylinder unit
- rod
- thread
- 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.)
- Expired - Lifetime
Links
- 230000003068 static effect Effects 0.000 claims description 18
- 230000004323 axial length Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 description 8
- 230000008439 repair process Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000002996 emotional effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
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
- F15B15/1447—Pistons; Piston to piston rod assemblies
Definitions
- the invention relates to a piston / cylinder unit with a Cylinder housing, a piston having an axis and one an axis having piston rod, the piston a Piston seal and at least one guide element and via an internal thread arranged in an opening an external thread provided on an extension of the piston rod connected is.
- the cylinder housing is usually supplemented by a guide bush in which the piston rod of the Piston / cylinder unit is guided and stored.
- the piston rod can end in a bearing eye with which it is secured against rotation is arranged.
- the cylinder housing is also with a Provide storage, for example a bearing eye.
- the piston is with this movable end in the cylinder housing Piston rod connected.
- the detachable attachment of the piston to the piston rod is a fundamental problem for a piston / cylinder unit.
- the detachable attachment must be designed so that the piston absorbs the axial forces generated by the fluid and can be transferred to the piston rod. Furthermore, one Sealing of the fluid between the piston and piston rod is required.
- the extension of the piston rod has a External thread, on which one attaches the piston Lock nut is screwed on.
- the lock nut has an opening and an assigned internal thread.
- the lock nut is, for example, with a plastic insert provided as a locking element against loosening acts. A non-positive anti-rotation lock is thus used.
- piston and the lock nut summarized in a single part, so that the associated Internal thread is provided in an opening in the piston.
- a radial element is provided as a securing element in the piston Stud screw applied in the assembled position on the The extension of the piston rod presses.
- the piston must be corresponding Have attack surfaces for a twisting tool to the necessary high tightening torque during assembly and that to be able to apply the appropriate loosening torque during disassembly. Special tools are generally indispensable for this.
- a piston / cylinder unit is the beginning described type known. It has a cylinder housing, a piston having an axis and an axis having piston rod. Between the piston and piston rod a static seal is provided. The piston has a plurality of piston seals that also act as guide elements serve or partially within the scope of professional skills Guide elements can be replaced. The piston is over one internal thread arranged in an opening with a an extension of the piston rod provided external thread. The axes of the threads and the axes of the piston rod and pistons match.
- the well-known piston / cylinder unit shows no protection against rotation of the piston relative to the piston rod and is also not concerned with a safe and repair-friendly training.
- the sleeve, the bolt or the like must also be against axial Hiking can be secured. This usually happens with one Screw with lock washer, which the piston in axial Direction and a stop for the migration of the Socket, the bolt or the like.
- Such a piston attachment has a relatively large number of additional ones Components that provide security against rotation. Through the Arrangement and design of the elements results in a relative long design in the area of the connection of the piston and the Piston rod.
- the piston attachment is complex and caused comparatively high in the manufacture of the individual elements Costs. This known piston attachment is advantageous however avoiding a tightening torque so that this Piston connection is repair-friendly because it is the piston after removing the securing means relatively easy twisting can be released from the piston rod.
- the invention has for its object a piston / cylinder unit, which are assembled while avoiding a tightening torque will improve in that the necessary anti-rotation a piston screwed onto a piston rod in different way than previously achieved. It's about one inexpensive training using as little as possible Individual parts.
- this is the case with a piston / cylinder unit achieved at the outset in that the internal thread of the piston and the external thread of the piston rod corresponding eccentricity to the respective axes of the Piston and the piston rod are provided, and that the Piston on the piston rod with such an angular end position is screwed that the axes of the piston and piston rod cursed with each other.
- the invention is based on the idea of the internal thread in the area of the piston no longer centric, but eccentric to To arrange the outer peripheral surface of the piston so that the opening of the piston and the internal thread provided therein Eccentric axis get or have the parallel and in Distance to the axis of the piston is arranged. This distance is called eccentricity.
- the piston rod has the outer one Circumference of its piston rod-side area an axis, while the extension and the external thread have an eccentric axis, which in turn are parallel and at a distance from the axis of the piston rod is arranged.
- the circumferential surfaces of the piston and piston rod are then in alignment their axes again and it is possible the unit from piston rod, Insert the piston and guide bush into the cylinder housing and assemble.
- the eccentricity described and the due to the piston seal required anyway and the Guide elements of the piston caused and applied restoring forces are usefully used to create an automatic Twisting between the piston and piston rod under operating conditions to avoid. Surprisingly, these are enough Restoring forces also out to jam the piston in its Do not let the cylinder barrel of the cylinder housing occur. This protection against rotation caused by the eccentricity requires no additional securing elements.
- the piston attachment therefore advantageously has few components and is therefore also inexpensive to manufacture. They are not even targets required for a turning tool on the piston because of the piston can be screwed on and loosened by hand. tightening are not used, so that other necessary hardening of the end faces on the piston and piston rod omitted.
- the piston connection advantageously has a short one Construction and contributes to the extent that the piston rod in their full length can be used
- This eccentric piston connection is particularly useful if the piston rod has a pin in the area of its extension and the piston has a corresponding one in the area of its opening Have bore that with the same and the same Eccentricity as the external thread or the internal thread is provided are and in the area of a static seal is.
- This static seal is from the field of Surface of the piston rod removed and in the area of the extension transferred. But this is not a disadvantage because piston and piston rod through the arrangement of the piston seal and usually several guide elements, such as guide rings, Guide bands u. Like., A corresponding axial length anyway must have, which is usually larger than the axial Length of the internal and external thread.
- the internal thread of the Piston be axially continuous and the piston rod the external thread extends over the axial length of the extension have extending.
- the static seal is then between Internal thread and external thread provided. The seal can too at this point make a force available to you Loosening the piston relative to the piston rod during Counteracts operation of the piston / cylinder unit.
- the common eccentricity is usually about 0.5% to 5.0% of the diameter of the piston rod.
- the common eccentricity usually depends on the absolute size of the Diameter of the piston rod. It shouldn't be too big be chosen to be the one caused by the eccentricity To keep bending stress on the piston rod small. on the other hand the common eccentricity must be large enough that the restoring forces of the seal and the guide element of the piston are sufficient to cause a relative rotation of the piston to prevent the piston rod from operating. Particularly advantageous has an eccentricity on the order of about 1-2 mm proven with a piston diameter of 80 mm. Too big Eccentricity is also disadvantageous in that it causes the usable diameters for the internal thread and the external thread is reduced.
- the piston rod and the piston Have markings to identify the angular end position.
- markings can be made by applying a punch the piston rod on the one hand and the piston on the other a splash of color or be applied in any other way.
- the Markings should be permanently applied so that they too in the event of a repair, a clear indication that the Release the angular end position during reassembly. Through such The angular end position is ensured so that the Unit consisting of piston and piston rod in the cylinder housing inserted and the guide bush attached accordingly can be.
- the piston is in all cases on the piston rod without application of a tightening torque. This increases the ease of repair considerably, but otherwise brings no major disadvantages. That by the eccentricity securing effect is sufficient. An additional second backup proves to be unnecessary.
- the piston / cylinder unit 1 shown in Fig. 1 shows how Usually a cylinder housing 2, which is tubular is and at one end into a bearing 3. At the other A socket 4 is welded onto the end of the cylinder housing 2, designed to receive a guide bush 5 is. The guide bushing 5 is connected to the shoulder bushing Screws 6 attached.
- a piston 7 is sliding and sealing in the cylinder housing 2 slidably mounted.
- the piston 7 has an outer peripheral surface 8, which, as usual, is cylindrical. Concentric the piston 7 has an axis 9 to the peripheral surface 8 on. Are on the outer peripheral surface 8 of the piston 7 Guide and sealing elements arranged, here a guide band 10, a seal 11 and a guide ring 12.
- the piston 7 has otherwise an opening 13, which is stepped here is. Part of the stepped opening 13 is with a Provided internal thread 14, while another part of the stepped Opening 13 is formed as a cylindrical bore 15. in the The area of this cylindrical bore 15 is a static seal 16 arranged.
- the opening 13 with its internal thread 14 and the bore 15 with its seal 16 are eccentric the axis 9 of the piston. You have one with it Eccentric axis 17, which is parallel to the axis 9 of the piston 7 extends. The distance between the axis 9 and the eccentric axis 17 is referred to as eccentricity e.
- the piston / cylinder unit 1 has a piston rod 18, which has an outer diameter 19, the outer circumference the piston rod 18 forms.
- the piston rod 18 is concentric an axis 20 to its outer circumference. In the assembled position, the axis 9 of the piston 7 is aligned with the Axis 20 of the piston rod 18.
- the piston rod 18 has on the piston 7 facing End of an extension 21.
- the extension 21 is in coordination the opening 13 is also stepped.
- Part of the Extension 21 has a cylindrical peripheral surface 22.
- On another part of the extension 21 has an external thread 23 Mistake.
- the extension 21 with its peripheral surface 22 and its External thread 23 is eccentric to the axis 20 of the piston rod 18 arranged and provided.
- the extension 21 has one Eccentric axis 24.
- the eccentric axis 24 extends parallel and at a distance from the axis 20 of the piston rod 18. This Distance is called eccentricity e.
- the eccentricity e of the piston 7 and the eccentricity e of the piston rod 18th match the amount.
- the piston rod 18 is sliding in the guide bush 5 and performed sealing.
- the guide bush 5 supports their part reaching into the socket 4 static Seals 29 and 30.
- the piston rod still has on her the end facing away from the piston 7 a bearing 31, via which the Connection of an implement or the like.
- the extension 21 has an end extending through the piston 7 a stop 32, which is in the starting position on a End wall of the cylinder housing 2 supports.
- One about the Piston rod 18 acting force is in this position Bypassing the piston 7 directly into the cylinder housing 2 or whose camp 3 forwarded.
- the piston / cylinder unit 1 is here double-acting, d. H.
- the both sides of the Pistons 7 formed pressure chambers can each with a fluid, especially with hydraulic fluid. This is done in a known manner via a corresponding one Control valve.
- the invention can also be simple Apply and use acting cylinders.
- the wiper is used to assemble the piston / cylinder unit 1 25, the seal 26, the switching ring 27 and the guide band 28 and the static seals 29 and 30 on the guide bush 5 mounted. Then the piston rod 18 is inserted and the piston 7 after the onset of static Seal 16 screwed on. The screwing can be done by hand because only corresponding frictional forces have to be overcome are. In this screwing operation, the piston 7 rotates around the Eccentric axis 24, with its axis 9 on a circular path about the eccentric axis 24 on the extension 21 of the piston rod 18 emotional. With every revolution there is a relative position between Piston 7 and piston rod 18 passed through, in which the axis 9th of the piston 7 is aligned with the axis 20 of the piston rod 18.
- the Unscrewing the piston 7 is in such an angular end position 33 ends, in which the axis 9 of the piston 7 with the Axis 20 of the piston rod 18 is aligned. With that, also the Circumferential surface 8 of the piston 7 with the axis 20 of the piston rod and with the tread of the cylinder housing 2.
- a certain game 34 or a distance between the frontal transition between the piston rod 18 and the Extension 21 on the one hand and the corresponding end face of the Piston 7, on the other hand, because of the production of the internal thread 14 and the external thread 23 bring this with it.
- this Angular end position 33 is now the unit consisting of piston rod 18, Guide bushing 5 and piston 7 inserted into the cylinder housing and secured with the screws 6.
- the piston is in this position 7 prevented from rotating relative to the piston rod 18.
- the piston rod 18 is secured against rotation with its bearing 31 held.
- the prestressing and restoring forces of the management and Sealing elements 10, 11, 12 and the friction in the area of static seal 16 are sufficient to the angular end position 33 secure so that the piston / cylinder unit remains in operation 1 no relative rotations between pistons 7 and piston rod 18 result.
- piston 7 and piston rod 18 in turn have a common Eccentricity e, resulting from each revolution of the Screwing the piston 7 onto the extension 21 of the piston rod 18 a cover angular position between the axis 9 of the Piston 7 and the axis 20 of the piston rod 18 results.
- the static seal 16 between piston 7 and piston rod 18 here in the area of an internal thread 14 on the piston 7 intended.
- the static seal 16 is in a groove 35 on Extension 21 inserted.
- the external thread 23 also extends otherwise over the essential length of the extension 21.
- In the assembled end angle position 33 there is also a play 34 or a distance between the mutually assigned end faces of piston 7 and piston rod 18.
- markings 37, 38 are provided, which show the angular end position 33.
- the markings 37, 38 can be punched as a dash of color or the like. They are particularly useful in the event of a repair the easy reaching and checking of the angular end position 33 of the screwed-on piston 7 onto the piston rod 18.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Fluid-Damping Devices (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Description
- Fig. 1
- einen Schnitt durch eine Kolben/Zylinder-Einheit in einer ersten Ausführungsform, und
- Fig. 2
- einen Schnitt durch eine Kolben/Zylinder-Einheit in einer zweiten Ausführungsform.
- 1
- Kolben/Zylinder-Einheit
- 2
- - Zylindergehäuse
- 3
- - Lager
- 4
- - Ansatzbuchse
- 5
- - Führungsbuchse
- 6
- - Schraube
- 7
- - Kolben
- 8
- - Umfangsfläche
- 9
- - Achse
- 10
- - Führungsband
- 11
- - Dichtung
- 12
- - Führungsring
- 13
- - Durchbrechung
- 14
- - Innengewinde
- 15
- - Bohrung
- 16
- - Dichtung
- 17
- - Exzenterachse
- 18
- - Kolbenstange
- 19
- - Durchmesser
- 20
- - Achse
- 21
- - Fortsatz
- 22
- - Umfangsfläche
- 23
- - Außengewinde
- 24
- - Exzenterachse
- 25
- - Abstreifer
- 26
- - Dichtung
- 27
- - Vorschaltring
- 28
- - Führungsband
- 29
- - Dichtung
- 30
- - Dichtung
- 31
- - Lager
- 32
- - Anschlag
- 33
- - Winkelendlage
- 34
- - Spiel
- 35
- - Nut
- 36
- -
- 37
- - Markierung
- 38
- - Markierung
Claims (9)
- Kolben/Zylinder-Einheit (1) mit einem Zylindergehäuse (2), einem eine Achse (9) aufweisenden Kolben (7) und einer eine Achse (20) aufweisenden Kolbenstange (18), wobei der Kolben (7) eine Kolbendichtung (11) und mindestens ein Führungselement (10, 12) aufweist und über ein in einer Durchbrechung (13) angeordnetes Innengewinde (14) mit einem auf einem Fortsatz (21) der Kolbenstange (18) vorgesehenen Außengewinde (23) verbunden ist, dadurch gekennzeichnet, dass das Innengewinde (14) des Kolbens (7) und das Außengewinde (23) der Kolbenstange (18) mit übereinstimmender Exzentrizität (e) zu den jeweiligen Achsen (9, 20) des Kolbens (7) und der Kolbenstange (18) vorgesehen sind, und dass der Kolben (7) auf die Kolbenstange (18) mit einer solchen Winkelendlage (33) aufgeschraubt ist, dass die Achsen (9, 20) von Kolben (7) und Kolbenstange (18) miteinander fluchten.
- Kolben/Zylinder-Einheit nach Anspruch 1, dadurch gekennzeichnet, dass die Kolbenstange (18) im Bereich ihres Fortsatzes (21) einen Zapfen und der Kolben (7) im Bereich seiner Durchbrechung (13) eine entsprechende Bohrung aufweisen, die mit gleicher und gleichliegender Exzentrizität (e) wie das Außengewinde (23) bzw. das Innengewinde (14) vorgesehen sind und in deren Bereich eine statische Dichtung (16) angeordnet ist.
- Kolben/Zylinder-Einheit nach Anspruch 1, dadurch gekennzeichnet, dass das Innengewinde (14) des Kolbens (7) axial durchgehend ausgebildet ist und die Kolbenstange (18) das Außengewinde (23) sich über die axiale Länge des Fortsatzes (21) erstreckend aufweist, und dass zwischen Innengewinde (14) und Außengewinde (23) eine statische Dichtung (16) vorgesehen ist.
- Kolben/Zylinder-Einheit nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die gemeinsame Exzentrizität (e) etwa 0,5 % bis 5,0 % des Durchmessers der Kolbenstange (18) beträgt.
- Kolben/Zylinder-Einheit nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die gemeinsame Exzentrizität (e) so groß bemessen ist, dass die Rückstellkräfte der Dichtung (11) und des Führungselementes (10, 12) des Kolbens (7) ausreichen, um eine Relativverdrehung des Kolbens (7) zu der Kolbenstange (18) im Betrieb zu verhindern.
- Kolben/Zylinder-Einheit nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Durchmesser des Innengewindes (14) des Kolbens (7) und der Durchmesser des Außengewindes (23) der Kolbenstange (18) zur Übertragung einer großen Axialkraft möglichst groß bemessen sind.
- Kolben/Zylinder-Einheit nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Innengewinde (14) und das zugehörige Außengewinde (23) eine Steigung im Bereich zwischen 2 mm und 5 mm aufweisen.
- Kolben/Zylinder-Einheit nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Kolbenstange (18) bei in die Winkelendlage (33) aufgeschraubtem Kolben (7) nach rückwärts aus dem Kolben (7) vorragt und in drucklosem Zustand sich direkt an dem Zylindergehäuse (2) abstützt.
- Kolben/Zylinder-Einheit nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Kolbenstange (18) und der Kolben (7) Markierungen (37, 38) zur Erkennung der Winkelendlage (33) aufweisen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10156504 | 2001-11-16 | ||
DE10156504A DE10156504C1 (de) | 2001-11-16 | 2001-11-16 | Kolben/Zylinder-Einheit mit einem Zylindergehäuse, einem Kolben und einer Kolbenstange |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1312810A1 EP1312810A1 (de) | 2003-05-21 |
EP1312810B1 true EP1312810B1 (de) | 2004-04-14 |
Family
ID=7706093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02023850A Expired - Lifetime EP1312810B1 (de) | 2001-11-16 | 2002-10-24 | Kolben/Zylinder-Einheit mit einer Drehsicherung zwichen Kolben und Kolbenstange |
Country Status (5)
Country | Link |
---|---|
US (1) | US6837144B2 (de) |
EP (1) | EP1312810B1 (de) |
AT (1) | ATE264460T1 (de) |
DE (2) | DE10156504C1 (de) |
ES (1) | ES2215963T3 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7350453B1 (en) | 2005-09-20 | 2008-04-01 | Bailey International Corporation | Hydraulic cylinder with rotatable gland |
SE530030C2 (sv) * | 2006-06-29 | 2008-02-12 | Vaederstad Verken Ab | Anordning vid en hydraulcylinder |
DE102007037760B4 (de) | 2007-08-10 | 2016-03-24 | Pacoma Gmbh | Kolben/Zylinder-Einheit mit einem Zylindergehäuse, einem Kolben und einer Kolbenstange |
ES2368406B1 (es) * | 2011-02-22 | 2012-09-07 | Ceimsa Electromedicina S.L. | Compresor de oxígeno. |
CN102829024A (zh) * | 2012-09-04 | 2012-12-19 | 无锡市长江液压缸厂 | 液压油缸活塞杆与后端盖安装结构 |
DE102014204617A1 (de) * | 2014-03-13 | 2015-09-17 | Zf Friedrichshafen Ag | Schaltvorrichtung eines automatisierten Schaltgetriebes |
DE102018116564A1 (de) * | 2018-07-09 | 2020-01-09 | Wabco Gmbh | Linearaktor |
DE102018121549A1 (de) | 2018-09-04 | 2020-03-05 | Liebherr-Components Kirchdorf GmbH | Verfahren zur Reparatur einer Kolben-Zylinder-Einheit innerhalb einer Arbeitsmaschine |
CN110410383B (zh) * | 2019-08-30 | 2024-05-17 | 扬州市永发气动液压设备有限公司 | 一种复合材料拉缸型液压缸 |
AT524517A1 (de) * | 2021-07-29 | 2022-05-15 | Avl List Gmbh | Längenverstellbare Pleuelstange mit verbessertem Zylinderdeckel |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2683422A (en) * | 1950-05-19 | 1954-07-13 | Jr Albert Z Richards | Rotary engine or compressor |
US2987046A (en) * | 1958-06-06 | 1961-06-06 | Blackhawk Mfg Co | Ram assemblage |
US3238559A (en) * | 1964-04-13 | 1966-03-08 | Muller Johann | Sausage stuffing machine |
US3293993A (en) * | 1964-11-05 | 1966-12-27 | Parker Hannifin Corp | Joint between a piston head and a piston rod of a fluid motor |
US3474710A (en) * | 1967-09-01 | 1969-10-28 | Air Mite Devices Inc | Cylinder construction using roll pins |
US3650182A (en) * | 1969-09-17 | 1972-03-21 | Cessna Aircraft Co | Closure for fluid pressure vessel |
US3885461A (en) * | 1973-10-23 | 1975-05-27 | Caterpillar Tractor Co | Self-locking piston and rod assembly for a fluid motor or the like |
FR2420677A1 (fr) * | 1978-03-21 | 1979-10-19 | Clark Equipment Co | Verin a fluide |
DE2937412C2 (de) * | 1979-09-15 | 1983-01-20 | Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen | Kolbenanordnung |
JPS5761837A (en) * | 1980-09-29 | 1982-04-14 | Kayaba Ind Co Ltd | Prevention equipment of falling of stay damper |
US5564327A (en) * | 1992-04-22 | 1996-10-15 | Sims; James O. | Piston/piston rod assembly |
FR2755739B1 (fr) * | 1996-11-12 | 1998-12-18 | Chapel | Dispositif pour etancher les deux chambres d'un verin, separees par un piston, tout en empechant celui-ci de se debloquer |
US5904440A (en) * | 1997-07-18 | 1999-05-18 | Sims; James O. | Piston/piston rod assembly having positive locking means between said piston and said piston rod |
-
2001
- 2001-11-16 DE DE10156504A patent/DE10156504C1/de not_active Expired - Fee Related
-
2002
- 2002-10-24 AT AT02023850T patent/ATE264460T1/de not_active IP Right Cessation
- 2002-10-24 DE DE50200354T patent/DE50200354D1/de not_active Expired - Fee Related
- 2002-10-24 EP EP02023850A patent/EP1312810B1/de not_active Expired - Lifetime
- 2002-10-24 ES ES02023850T patent/ES2215963T3/es not_active Expired - Lifetime
- 2002-11-14 US US10/294,852 patent/US6837144B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US20030094097A1 (en) | 2003-05-22 |
ES2215963T3 (es) | 2004-10-16 |
ATE264460T1 (de) | 2004-04-15 |
EP1312810A1 (de) | 2003-05-21 |
US6837144B2 (en) | 2005-01-04 |
DE50200354D1 (de) | 2004-05-19 |
DE10156504C1 (de) | 2003-04-10 |
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