EP1058037A1 - Piston pour un cylindre et son procédé de fabrication - Google Patents

Piston pour un cylindre et son procédé de fabrication Download PDF

Info

Publication number
EP1058037A1
EP1058037A1 EP00106915A EP00106915A EP1058037A1 EP 1058037 A1 EP1058037 A1 EP 1058037A1 EP 00106915 A EP00106915 A EP 00106915A EP 00106915 A EP00106915 A EP 00106915A EP 1058037 A1 EP1058037 A1 EP 1058037A1
Authority
EP
European Patent Office
Prior art keywords
guide part
support body
sealing
piston according
piston
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
Application number
EP00106915A
Other languages
German (de)
English (en)
Other versions
EP1058037B1 (fr
Inventor
Gerald Müller
Harald Röhrig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1058037A1 publication Critical patent/EP1058037A1/fr
Application granted granted Critical
Publication of EP1058037B1 publication Critical patent/EP1058037B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2892—Means for indicating the position, e.g. end of stroke characterised by the attachment means
    • 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
    • F15B15/1452—Piston sealings
    • 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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/28—Means for indicating the position, e.g. end of stroke
    • F15B15/2807—Position switches, i.e. means for sensing of discrete positions only, e.g. limit switches

Definitions

  • the invention relates to a piston for a working cylinder.
  • Fluid operated cylinders regularly contain one Piston, which is axially displaceable by the application of fluid and on which an operating force can be tapped.
  • DE-GM 296 157 99 contains a multi-part piston Support body on which two sealing rings are unbuttoned and the carries a band-like thin annular guide member, wherein both the seals and the guide part for interaction with that provided on the associated cylinder tube Tread are provided. Manufacturing and assembly of this known pistons are very expensive.
  • a piston known from EP 0 093 859 A2 was therefore used already suggested, instead of separate sealing rings provide one-piece sealing body by injection molding molded onto the multi-part support body here becomes. This eliminates the cumbersome button assembly individual sealing rings, at the same time a more secure Hold of the sealing material is guaranteed. Indeed here is the guide surface used to guide the piston formed by the material of the sealing body, which ensures the required sealing properties are relatively soft is so that high in the operation of the associated working cylinder Frictional forces occur.
  • a piston for a working cylinder with a support body that is located radially outside Area an annular defining a guide surface Guide part and a separate with respect to the guide part carries annular sealing body, the sealing body is integrally formed on the support body and two axially on both sides of the Guide part arranged sealing sections, the spaced apart by several in the circumferential direction of the support body one-piece connecting webs of the sealing body are interconnected, which are in recording channels extend which axially penetrate the guide part.
  • the guide part which as a one-piece Part of the support body or as a separate component can be realized, experiences a via the support body radial support and yet allowed by the individual Channels, an integral connection between the sealing sections lying on both sides of the guide part of the sealing body, which is thus held securely on the supporting body become. It is therefore an inexpensive, more reliable and pistons that are easy to manufacture with just a few individual parts in front.
  • the receiving channels for the connecting webs of the sealing body are advantageously at least partially groove-like in shape Recesses carried out to the radial outside of the guide part are open and the guide surface of the guide part in several circumferentially at a distance subdivide successive partial areas. In this way the guide surface is no longer a coherent one Ring surface executed, however remains a reliable Leadership role because the individual Partial areas continue over the entire outer circumference of the piston are distributed. Because the receiving channels radially outward are open, is also the molding process of the sealing body pretty easy.
  • receiving channels in the form of openings closed on the circumference realized that enforce the guide part in one area, which is radially lower than the guide surface of the guide part.
  • one remains as a guide surface Preserved coherent ring surface and the two sealing sections through the breakthroughs Connecting bars held securely in place.
  • both types of recording channels also can be provided simultaneously on one and the same piston.
  • the sealing body expedient, but also the guide part as a separate part with respect to the supporting body executed and by a suitable method on the support body molded so that in particular a material connection is obtained.
  • Both for molding the guide part as well as for molding the sealing body is expedient an injection molding process. It is preferred first molded the guide part on the support body, after which the molding of the sealing body takes place, the Sealing body material molded onto the supporting body at the same time and is molded into the receiving channels.
  • the supporting body itself suitably consists of metal.
  • the Support body expediently arranged coaxially to this integrated annular recess, which is a permanent magnet records.
  • the latter can be designed as a plastic part be, the permanent magnetic properties by Added permanent magnetic components or particles can be and its production by immediate Formation of the material in question in the annular recess can be done. This eliminates the need for a subdivision of the support body in the region of the recess, expediently it is provided that the annular guide member the permanent magnet embedded in the support body radially encloses coaxially on the outside.
  • both sealing sections of the Sealing body each have at least one sealing lip for the contact with the tread of the assigned working cylinder.
  • one or both sealing sections can be one Define support body axially upstream buffer body, the for end position damping in the operation of the associated working cylinder is usable.
  • an annular to a support body Molded guide part that of several in the circumferential direction of the support body spaced apart receiving channels is axially interspersed, and that one to the composed of the support body and the guide part Unit forms an annular sealing body that over sealing sections placed axially on both sides of the guide part has the by molded into the receiving channels Connecting webs are integrally connected to one another.
  • a piston 1 is shown in its entirety or in partial representation, which is not for use within a provided fluid-operated cylinder shown is.
  • a preferred application is the area the pneumatic cylinder.
  • the piston 1 is in the tubular housing of the associated Working cylinder arranged and divided the relevant Interior of the cylinder housing in two work rooms, with respect to which a fluid pressure medium as required is supplied or discharged.
  • the moves Piston relative to the cylinder housing in an axial direction being on the one defined by the inner surface of the cylinder housing Tread slides along.
  • the movement of the piston can on a motion-coupled with the piston, for example fixed on the piston and out of the cylinder housing tap led out power transmission link, for example is formed by a piston rod.
  • the piston 1 contains a support body 2, which in principle could be constructed in several parts, but preferably as in Embodiment consists of a single component. He is expediently designed disc-like, the Disc plane perpendicular to the longitudinal axis 3 of the piston 1 runs.
  • connecting means 4 On the support body 2 connecting means 4 are provided a fixed connection with a power transmission part of the enable the kind already mentioned. It can be as shown around a hole axially penetrating the support body 2 centrally act over which there is a piston rod, not shown can be attached.
  • the support body 2 preferably consists of a metallic one Material. In the exemplary embodiment, it is made of aluminum material manufactured. Is the piston 1 as in the embodiment designed in such a way that with its help Position detection based on an integrated permanent magnet 5 can be realized is recommended for the support body 2 a non-magnetic, non-magnetizable material. Here it could also be a plastic material.
  • the radial outer surface 6 In the radially outward-facing peripheral surface of the support body 2, hereinafter referred to as the radial outer surface 6 is a concentrically arranged groove-like depression embedded, which defines an annular recess 7, in the annular permanent magnet 5 is received.
  • the material for the permanent magnet 5 comes here preferably one enriched with permanent magnetic components Plastic material in question, which is casting technology can be processed.
  • direct molding or injection of the permanent magnet 5 in the support body 2 is one Magnetic integration possible without the support body 2 in the area to divide the annular recess 7 axially.
  • the magnetic field of the permanent magnet is suitable for the operation of the piston 1 5 for the contactless actuation of a suitable Sensor that regularly outside of the piston 1 receiving Interior of the working cylinder next to the stroke the piston 1 installed in a particularly adjustable manner is.
  • the piston 1 should not have such a position detection enable, the permanent magnet 5 expediently omitted to save costs, provided in this case may be that the annular recess 7 is unoccupied remains or such a recess 7 not in the Support body 2 is introduced.
  • a annular guide part 8 arranged in the radially outer area of the support body 2 in the radially outer area of the support body 2 . It is coaxial with the Support body 2 aligned and defines one radially outward pointing, preferably cylinder-like guide surface 12, which extends in the circumferential direction of the piston 1. in the Operation is the piston 1 in the cylinder housing of the assigned working cylinder that it fits with the guide surface 12 on the border of the interior of the cylinder housing cylindrical tread and at his Axial movement slides along this tread.
  • the guide member 8 could be an integral part of the Support body 2 be. To choose the material for the individual Components optimally take into account the respective function implementation is recommended, however separate components, as in the embodiment of Case is.
  • the guide part 8 as a plastic material existing ring body formed, the support body 2nd coaxially encloses on its radial outer surface 6.
  • the guide part 8 can be oriented radially outwards Cover the opening of the annular recess 7.
  • the axially measured width of the guide part is expedient 8 less than the correspondingly measured width of the support body 2.
  • the guide member 8 place on the outer circumference of the support body 2 such that the latter, the guide part 8 axially on both sides with annular Overhanging edge surfaces 13.
  • the guide member 8 on a slight Radial projection of the support body 12 sits the axial width corresponds in particular to that of the guide part 8.
  • the guide part 8 is non-positively fixed on the support body 2. It could be pressed onto the support body 2, for example.
  • the guide part 8 is integrally formed on the support body 2, in particular by injection molding. The shape of the guide part 8 is thus created immediately when the plastic material is injected onto the in the exemplary embodiment, metallic support body 2.
  • an annular Recess 7 for receiving a permanent magnet 5 is the axial width of the guide part 8 is preferably chosen larger than the correspondingly measured width of the radially outward oriented opening of the annular recess 7, so that the guide part 8 axially on both sides of the annular recess 7 can come into firm contact with the support body 2.
  • the guide part 8 there is expediently a relative hard and wear-resistant plastic material in question, so that the guide surface 12 defined by the guide part 8 low friction with the tread of the assigned working cylinder can cooperate.
  • the support body 2 carries in its radial outer area also an annular sealing body 15, with respect to the guide member 8 and the support body 2 is formed separately and made of rubber-elastic material Properties. It is preferably the sealing body 14 around a plastic body made of elastomer material. The latter favors production in a special way and attachment to the support body 2 by the sealing body 14 to the support body 2 and to the guide part 8 by a suitable Process is molded.
  • the molding is advantageously carried out by injection molding, a cohesive Contact between the material of the sealing body 14 and the materials of the support body 2 and the guide member 8 becomes.
  • Adhesion promoter applied between the parts molded onto one another.
  • the sealing body 14 contains two axially opposite Sealing sections arranged on the sides of the guide part 8 15, which, like the sealing body 14 in its entirety, is coaxial are arranged to support body 2.
  • the sealing sections 15 lie on the two radially outwardly oriented annular Edge surfaces 13 of the radial outer surface 6 and are also over the respectively assigned peripheral edge 16 of the Support body 2 pulled radially inwards, with each a ring disk-like section 17 on the the edge 16 adjoining axially oriented annular Border surface section 18 of the support body 2 abut.
  • Each sealing section 15 has the guide part 8 axially adjacent area over a coaxial to the longitudinal axis 3 annular sealing lip 22, which is not in a working cylinder assembled state of the piston 1 obliquely radially protrudes outside and radially projects beyond the guide surface 12.
  • the sealing lips are 22 bent radially inward so that its outermost edge is in axial alignment with the guide surface 12.
  • the sealing lips 22 bring about the operation of the piston 1 contact with the tread of the assigned working cylinder a fluid-tight separation of the two axially on both sides of the piston 1 lying work rooms.
  • the ring disk-like axially upstream of the support body 2 Games 17 of the sealing portions 15 define in the embodiment several rubber-elastic buffer bodies 23, which are suitable in the operation of the piston, its final impact on the end walls of the cylinder housing to reduce. Are there multiple buffer bodies 23, which are arranged in a ring-like constellation and between which radially continuous spaces 24 remain, is at the same time an optimal fluid application of the affected piston surface reached when moving from an end position.
  • the guide member 8 of a plurality of receiving channels 25 axially penetrates the at a distance from each other over the ring circumference of the guide part 8 are distributed and in which connecting webs 26 of the Sealing body 14 extend over which the sealing portions on both sides 15 partially integrally connected are.
  • the sealing body 14 includes two axially spaced annular seal portions 15 and one A plurality of axially extending connecting webs 26, which the sealing portions 15 preferably along their circumference in regularly connected in one piece are.
  • the sealing body 14 is in one piece Component.
  • the receiving channels 25 executed in the form of groove-like depressions, to the radial outside of the guide part 8, that is Guide surface 12 are open, whereby they extend over the entire axial width of the guide part 8 and extend two axially oriented annular side surfaces 27 of the Open out guide part 8.
  • the guide surface 12 through the receiving channels 25 into individual strip-shaped Subareas 32 divided into the circumferential direction of the guide part 8 are arranged in succession and each have an arcuate extension.
  • the connecting webs 26 virtually bridge the guide part 8, whereby due to their Course within the receiving channels 25, the guide surface 12 do not interfere. You can do this as shown be provided that the radially outwardly oriented outer surfaces 28 of the connecting webs 26 flush into the partial areas 32 pass over the guide surface 12 and align with it, so that there is continuous along the entire circumference of the guide part 8 extends surface.
  • the receiving channels 25 completely closed on the circumference and as channel-like Openings made that are radially lower than the guide surface 12, although it is also to the two axially oriented annular side surfaces 27 of the guide part 8 open out.
  • the axial openings have here the shape of window-like mouths.
  • the receiving channels 25 of the sealing body material forming the connecting webs 26 preferably filled in completely and put an integral connection between the two ring-shaped Side surfaces 27 flanking sealing sections 15 ago.
  • the axial width of the guide part 8 a constant axial distance between the two sealing sections 15 and in particular the sealing lips 22.
  • FIGS. 1 to 4 The embodiment of Figures 5 to 8 has the advantage that the molding of the sealing body 14 in connection with the associated injection mold only a single injection point needed.
  • the design of FIGS. 1 to 4 the advantage that one over the circumference of the guide part 8th completely circular self-contained guide surface 12 remains.
  • the secure fixation of the two axial sealing sections 15 on the support body 2 through the connecting webs crossing the guide part 8 26 guaranteed.
  • the sealing sections 15 are thus axially held together securely and can also with unfavorable Operating conditions can not be replaced by the support body 2.
  • the pistons shown 1 In a preferred way of manufacturing the pistons shown 1 is first a one-piece forming the support body 2 Metal part provided that as an insert in the associated Pours arm is inlaid. Then the permanent magnet 5 injected, then as a guide band identifiable annular guide part 8 under simultaneous Formation of the receiving channels 25 sprayed and finally molded on the two sealing sections 15 at the same time, the thereby over the connecting webs realized at the same time 26 are connected. With the so obtained Piston 1 becomes an accidental disconnection of the Sealing sections 15 prevents the sealing lips 22nd or define differently designed sealing zones. The pistons 1 can therefore also be used for long stroke lengths. Grooves that are complex to produce for a snap connection between seals and support body can be omitted.
  • the pistons can be axially relatively short Realize overall length. It can also include the number of parts for the functional assembly of the piston can be reduced, such as manufacturing costs can also be reduced.
  • Through the integrated Buffer body 23 can be associated with the operation of the Working cylinder permissible impact force or energy increased become.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)
  • Actuator (AREA)
  • Fluid-Damping Devices (AREA)
  • Forging (AREA)
EP00106915A 1999-06-01 2000-03-31 Piston pour un cylindre et son procédé de fabrication Expired - Lifetime EP1058037B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19925083A DE19925083A1 (de) 1999-06-01 1999-06-01 Kolben für einen Arbeitszylinder und Verfahren zu seiner Herstellung
DE19925083 1999-06-01

Publications (2)

Publication Number Publication Date
EP1058037A1 true EP1058037A1 (fr) 2000-12-06
EP1058037B1 EP1058037B1 (fr) 2003-05-14

Family

ID=7909879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00106915A Expired - Lifetime EP1058037B1 (fr) 1999-06-01 2000-03-31 Piston pour un cylindre et son procédé de fabrication

Country Status (4)

Country Link
EP (1) EP1058037B1 (fr)
AT (1) ATE240469T1 (fr)
DE (2) DE19925083A1 (fr)
ES (1) ES2193908T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2854856A1 (fr) * 2003-05-13 2004-11-19 Koyo Steering Europe Kse Ensemble piston de verin de direction assistee hydraulique
WO2006105828A1 (fr) 2005-04-07 2006-10-12 Festo Ag & Co. Piston et dispositif de reglage commande par un fluide et equipe de ce piston
EP1818544A1 (fr) * 2006-02-08 2007-08-15 Parker Hannifin GmbH & Co. KG Geschäftsbereich Dichtungen Piston magnétique pour vérin pneumatique
CN113874642A (zh) * 2019-05-27 2021-12-31 Nok株式会社 密封装置
CN114791007A (zh) * 2022-06-23 2022-07-26 常州市中昊轨道交通科技发展有限公司 一种防止流体泄漏的密封圈

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005001117U1 (de) 2005-01-25 2005-03-31 Festo Ag & Co Kolben und damit ausgestatteter Arbeitszylinder
DE102006006677A1 (de) * 2006-02-14 2007-08-23 Parker Hannifin Gmbh & Co. Kg Magnetkolben für Pneumatikzylinder
DE102008045568A1 (de) * 2008-09-03 2010-03-04 Krones Ag Einrichtung und Kolben zum Aussortieren von Artikeln
DE102015210100A1 (de) * 2015-06-02 2016-12-08 Schaeffler Technologies AG & Co. KG Druckzylinder mit Zentrierring als kunststoffgebundener Magnet
DE102021205951B4 (de) * 2021-06-11 2024-09-26 Festo Se & Co. Kg Kolben und damit ausgestatteter fluidbetätigter Arbeitszylinder

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487390A (en) * 1946-11-22 1949-11-08 Henry M Smith Pump piston
GB2009323A (en) * 1977-11-30 1979-06-13 Parisienne Outillage An arrangement for starting the operation of a cushioned-piston jack
DE2947516B1 (de) * 1979-11-24 1981-01-15 Festo Maschf Stoll G Kolben fuer beruehrungslose Abtastung der Kolbenstellung
CH630147A5 (en) * 1977-07-22 1982-05-28 Specken Ag Pneumatic cylinder with non-contact limit switch
EP0093859A2 (fr) * 1982-04-02 1983-11-16 Robert Bosch Gmbh Piston pour contrôler sans contact la position duditpiston
DE3937896A1 (de) * 1989-11-15 1991-05-16 Parker Praedifa Gmbh Verbundelement, insbesondere nutring-dichtung
EP0631057A1 (fr) * 1993-06-23 1994-12-28 Firma Carl Freudenberg Joint d'étanchéité pour piston entrainé pneumatiquement
US5813313A (en) * 1996-05-03 1998-09-29 Festo Kg Piston for a fluid power cylinder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7836994U1 (de) * 1979-03-22 Festo-Maschinenfabrik Gottlieb Stoll, 7300 Esslingen Kolben für insbesondere mit Druckluft betriebene Arbeitszylinder

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487390A (en) * 1946-11-22 1949-11-08 Henry M Smith Pump piston
CH630147A5 (en) * 1977-07-22 1982-05-28 Specken Ag Pneumatic cylinder with non-contact limit switch
GB2009323A (en) * 1977-11-30 1979-06-13 Parisienne Outillage An arrangement for starting the operation of a cushioned-piston jack
DE2947516B1 (de) * 1979-11-24 1981-01-15 Festo Maschf Stoll G Kolben fuer beruehrungslose Abtastung der Kolbenstellung
EP0093859A2 (fr) * 1982-04-02 1983-11-16 Robert Bosch Gmbh Piston pour contrôler sans contact la position duditpiston
DE3937896A1 (de) * 1989-11-15 1991-05-16 Parker Praedifa Gmbh Verbundelement, insbesondere nutring-dichtung
EP0631057A1 (fr) * 1993-06-23 1994-12-28 Firma Carl Freudenberg Joint d'étanchéité pour piston entrainé pneumatiquement
US5813313A (en) * 1996-05-03 1998-09-29 Festo Kg Piston for a fluid power cylinder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2854856A1 (fr) * 2003-05-13 2004-11-19 Koyo Steering Europe Kse Ensemble piston de verin de direction assistee hydraulique
WO2006105828A1 (fr) 2005-04-07 2006-10-12 Festo Ag & Co. Piston et dispositif de reglage commande par un fluide et equipe de ce piston
US7650828B2 (en) 2005-04-07 2010-01-26 Festo Ag & Co. Kg Piston and a fluid operated setting device connected therewith
EP1818544A1 (fr) * 2006-02-08 2007-08-15 Parker Hannifin GmbH & Co. KG Geschäftsbereich Dichtungen Piston magnétique pour vérin pneumatique
CN113874642A (zh) * 2019-05-27 2021-12-31 Nok株式会社 密封装置
CN114791007A (zh) * 2022-06-23 2022-07-26 常州市中昊轨道交通科技发展有限公司 一种防止流体泄漏的密封圈
CN114791007B (zh) * 2022-06-23 2022-09-20 常州市中昊轨道交通科技发展有限公司 一种防止流体泄漏的密封圈

Also Published As

Publication number Publication date
DE19925083A1 (de) 2000-12-14
ES2193908T3 (es) 2003-11-16
DE50002143D1 (de) 2003-06-18
EP1058037B1 (fr) 2003-05-14
ATE240469T1 (de) 2003-05-15

Similar Documents

Publication Publication Date Title
EP1866548B1 (fr) Piston et dispositif de reglage commande par un fluide et equipe de ce piston
DE19715858C2 (de) Kolben für einen Arbeitszylinder
EP1899611B1 (fr) Piston pour un vérin
DE2745356C2 (de) Dichtelement
DE112014006457B4 (de) Fluiddruckzylinder
DE102009014817B4 (de) Fluidbetätigter Linearantrieb
EP1058037B1 (fr) Piston pour un cylindre et son procédé de fabrication
EP4086490A1 (fr) Soupape directionnelle de véhicule à moteur permettant de régler un écoulement de fluide
DE4004052C2 (fr)
DE19504207C5 (de) Arbeitszylinder
EP3164609B1 (fr) Piston et dispositif de controle équipé de celui-ci
EP2350463B1 (fr) Tube de carter et entraînement linéaire équipé de ce dernier
EP0584480B1 (fr) Dispositif d'étanchéité pour soupapes à voies multiples
DE102005041418A1 (de) Hydraulikzylinder, insbesondere Geberzylinder eines hydraulischen Kupplungsausrücksystems
DE3725101A1 (de) Kolben fuer kolben-zylinder-einheit
DE202005013185U1 (de) Kolben für einen Arbeitszylinder
EP2489885B1 (fr) Piston pour un cylindre de travail
DE102021205951B4 (de) Kolben und damit ausgestatteter fluidbetätigter Arbeitszylinder
EP1637746A2 (fr) Cylindre hydraulique, en particulier maître cylindre pour un système hydraulique de débrayage
EP2047115B1 (fr) Entraînement linéaire à commande fluidique
DE9407083U1 (de) Kolbenschieberventil
DE29720483U1 (de) Kolbenstangen-Zylinder-Einheit
EP0964190A2 (fr) Dispositif racleur
WO2016074691A1 (fr) Piston et dispositif de réglage équipé de ce dernier
EP0965779A2 (fr) Anneau d'étanchéité

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000823

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030514

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030514

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030514

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: TROESCH SCHEIDEGGER WERNER AG

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20030515

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50002143

Country of ref document: DE

Date of ref document: 20030618

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030814

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030814

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030814

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030814

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2193908

Country of ref document: ES

Kind code of ref document: T3

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

Ref document number: 1058037E

Country of ref document: IE

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20040326

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040331

26N No opposition filed

Effective date: 20040217

BERE Be: lapsed

Owner name: *FESTO A.G. & CO.

Effective date: 20040331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050401

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20050401

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20080318

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20080331

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20080528

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20091001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20091001

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20100331

Year of fee payment: 11

Ref country code: IT

Payment date: 20100323

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100309

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20100319

Year of fee payment: 11

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110331

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20111001

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110331

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50002143

Country of ref document: DE

Effective date: 20111001

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110331

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110331