EP2047115A1 - Fluid-actuated linear drive - Google Patents
Fluid-actuated linear driveInfo
- Publication number
- EP2047115A1 EP2047115A1 EP07786171A EP07786171A EP2047115A1 EP 2047115 A1 EP2047115 A1 EP 2047115A1 EP 07786171 A EP07786171 A EP 07786171A EP 07786171 A EP07786171 A EP 07786171A EP 2047115 A1 EP2047115 A1 EP 2047115A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- linear drive
- drive according
- housing cover
- cap part
- housing
- 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
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
- F15B15/1433—End caps
Definitions
- the invention relates to a fluid-actuated linear drive, with a drive housing, which has a housing tube and frontally arranged thereon end walls, wherein at least one end wall is designed as a housing cover with respect to the separate housing cover, which dips into the housing tube with a centering, on the outer circumference of an annular groove is disposed with two axially opposite groove flanks, is received in the at least one annular seal for cooperation with the inner surface of the overarching housing tube.
- a known fluid-actuated linear drive of this type is described in the introductory part of DE 3807889 Al.
- a working cylinder whose drive housing comprises a closed by two housing cover housing tube, wherein the housing cover immerse each with a centering in the housing tube.
- an annular groove is introduced into the outer circumference of the centering section by machining, which receives a sealing ring cooperating with the inner surface of the housing tube.
- the housing tube has a relatively large wall thickness and in which the housing tube is clamped axially fixed to the housing cover.
- this type of sealing is not suitable.
- this object is achieved in that arranged on the side of the housing tube outer axial groove flank of the annular groove is formed by an end face of a side of the housing tube 20 coaxially attached to the centering and fixed to the housing cap part ,
- both axially oriented groove flanks are thus no longer an integral part of the centering section.
- the outer groove flank of the annular groove located axially closer to the other abutment wall is now part of a separate cap part with respect to the housing cover, which is attached to the centering section to complete the annular groove, in particular by means of a mating operation.
- the axially opposite inner groove flank o as well as the groove base of the annular groove can furthermore be formed in one piece on the housing cover, wherein, owing to the lack of the outer groove flank a non-cutting production by injection molding is possible, which in conjunction with an axial demolding offers the possibility to produce existing on the housing cover surfaces of the annular groove without burrs and thus without the need for mechanical post-processing.
- the subsequent application of the cap part completes the radially outwardly open annular groove, expediently after the at least one annular seal has previously been slipped into place on the centering section.
- cap part it would be possible in principle to design the cap part so that it dips with a central portion into a recess of the housing cover and protrudes outward with an exclusively radially extending wall in order to limit the annular groove on the outer axial side.
- a design is considered more expedient, in which the cap part has a lateral peripheral wall, which the Zentrierab-
- peripheral wall expediently closes one of the end face of the centering axially upstream bottom wall of the cap part, which preferably at the aforementioned
- end face of the centering abuts. It is then possible, in particular, to form the end face of the cap part, which points axially from the centering section, as an impact surface for a drive piston arranged linearly displaceably in the interior of the drive housing. This can be a
- At least one and expediently a plurality of wall segments may have a radially inwardly projecting latching projection, which can engage in a latching recess formed on the outer circumference of the centering section for latching the cap part. If the detent recess extends only over part of the circumference of the centering section, in this way it is also very easy to achieve an anti-rotation lock between the cap part and the housing cover.
- the bottom wall of the cap member may be axially broken in the central region. In this way, for example, a fluid passage for the supply of the linear drive and discharged fluidic pressure medium is possible. Also, a piston rod can be passed if the linear drive is a fluid-actuated working cylinder equipped with a piston rod.
- a particularly stable hold for the cap part arises when the latter protrudes with a sleeve-shaped axial extension into a recess of the housing cover which is open towards the end face of the centering section and is radially supported on its inner peripheral surface.
- This is particularly useful in conjunction with the aforementioned functionality as an impact surface for a drive piston.
- the radial support is also particularly advantageous if the sleeve-shaped axial extension acts as a sliding bearing for a piston rod of the linear drive passing through it coaxially. The transverse forces introduced by the piston rod into the sliding bearing are thereby transmitted directly radially into the housing cover, without exerting a tilting moment on the bottom surface and thus on the outer axial groove flank of the annular groove.
- a sliding bearing can in particular be used to the bottom wall axially lo spaced ring portion of the sleeve-shaped axial extension, which is connected via a plurality of axially extending and spaced in the circumferential direction of the axial extension to each other arranged connecting webs with the bottom wall.
- the storage area i5 for the piston rod in the immediate vicinity of its exit region can be placed out of the housing cover and at the same time be limited to the smallest possible axial length.
- the connecting webs can give a certain flexibility, which facilitates the assembly, because 2o thereby tolerances are compensated.
- the gaps between adjacent Ve rbi ⁇ dungsstegen ' also lead to a "significant material savings and permit when necessary fluid passage.
- annular section of the sleeve-shaped axial extension which acts as a sliding bearing to be formed by a plurality of longitudinal grooves introduced into the inner circumferential surface into a plurality of sliding grooves spaced apart in the circumferential direction. subdivide storage areas. As has been shown, such an embodiment proves to be much more dimensionally true in injection molding than an unsegmented bearing surface.
- the cap part can also fulfill a holding function with respect to an annular scraper which is arranged in front of the sleeve-shaped axial extension and encloses an optionally present piston rod in order to strip contaminants from the piston rod.
- the cap part is preferably a one-piece plastic part, preferably made of an unreinforced thermoplastic material.
- several functions can be integrated into the cap part, wherein in addition to the definition of the outer groove flank of the annular groove, the formation of a sliding bearing and / or the supporting function with respect to an upstream annular scraper is added.
- the material used for the housing cover is a fiber-reinforced plastic material, in particular plastic material with glass fiber reinforcement.
- the housing cover is preferably an injection molded part.
- either only one or preferably both end walls can be designed in the form of housing covers, which are equipped with a cap part of the kind explained. It is possible that the two cap parts of one and the same linear drive are structurally different from each other. This is especially true when the linear actuator as a fluid-operated Working cylinder is configured and only one of the two end walls is penetrated by a piston rod.
- FIG. 1 shows a plan view of a preferred design of the fluid-operated linear drive according to the invention
- FIG. 3 shows the front housing cover in FIG. 2 in the region III framed in dash-dotted lines in a cut-away detail according to section line IH-III from FIG. 8,
- FIG. 4 shows a perspective detail view of the front housing cover with a view from obliquely behind
- FIG. 5 shows a rear view of the front housing cover with viewing direction according to arrow V
- FIG. 6 shows a further longitudinal section through the front
- FIGS. 7 and 8 are perspective exploded views of the front housing cover from different viewing directions
- FIG. 9 shows the front housing cover in a side view in an exploded view
- FIG. 10 shows the arrangement from FIG. 9 in longitudinal section
- FIG. 12 shows the rear housing cover according to FIG. 11 in a perspective rear view, FIG.
- Figure 13 is an end view of the rear housing cover with viewing direction according to arrow XIII of Figure 12 and
- FIG. 14 shows a further longitudinal section of the rear housing cover according to section line XIV-XIV in a sectional plane rotated by 45 ° with respect to FIG. 11.
- the fluid-actuated linear drive 1 shown in its entirety in FIGS. 1 and 2 can be operated with any fluidic pressure medium, preferably with compressed air. It is designed in the embodiment as a working cylinder, in particular pneumatic cylinder.
- the linear drive 1 contains an elongated drive housing 2 with a housing tube 3 preferably consisting of a thin-walled metal and two end walls 4 closing the housing tube 3 at its two end sides. Both end walls 4 in the exemplary embodiment are separate components in the form of housing cover with respect to the housing tube 3 executed, which are to be distinguished for better distinction as the front housing cover 5 and the rear housing cover 6.
- the housing tube 3, together with the two housing covers 5, 6, defines an interior space 7 in which a drive piston 8, which is displaceable by fluid force, is accommodated, which is in sealing contact with the inner surface of the housing tube 3.
- Both housing cover 5, 6 are each penetrated by a separate fluidic control channel 14, 15, which opens at one end with an outer mouth region 14a, 15a to an outer surface of the housing cover 5, 6 and allows the connection of a Pluidtechnisch not shown. These can be used to supply and remove the fluidic pressure medium required for operation.
- each control channel 14, 15 opens via a coaxial to the interior 7 inner Mündungs Scheme- 16 in each one of two working chambers 17, 18, in which the drive piston 8, the interior 7 divided axially.
- the two working chambers 17, 18 are acted upon by the associated control channels 14, 15 in a conventional manner so controlled with fluid that the drive piston 8 and with this the piston rod 12 to a direction indicated by a double arrow linear working movement 22 in the axial direction of the longitudinal axis 23 of the Drive housing 2 can be driven.
- the two housing cover 5, 6 are attached to the housing tube 3 according to the same principle.
- Each housing cover 5, 6 has a centering portion 24, which has a part of its length - hereinafter referred to as mounting portion 25 - a complementary to the inner contour of the housing tube 3 outer contour. With this centering portion 24 of the housing cover 5, 6 is inserted frontally into the housing tube 3.
- the centering portion 24 On the outer circumference of the fastening portion 25, the centering portion 24 has a radially outwardly open fastening groove 26, in which a peripheral portion of the housing tube 3 is pressed by plastic deformation by means of a rolling process. This results in the housing tube 3 a ring encircling bead 27, which engages in the production of a non-positive and positive connection in the mounting groove 26 and thereby a solid
- the annular groove 28 is located on the outer circumference of the centering 24, with radially inwardly lying groove bottom 3 and radially outwardly facing slot opening 34, and with two mutually axially facing groove flanks 35, 36.
- the on the side of the housing tube 3 and therefore closer to each other housing cover lying groove flank is hereinafter referred to as outer groove flank 36, the opposite and lying closer to the mounting portion 25 groove flank inner groove flank 35th
- the annular seal 32 is in particular a simple O-ring. If desired, more than one annular seal 32 may be disposed in the annular groove 28.
- the plugged onto the centering 24 housing tube 3 engages over the annular groove 28, so that the seal 32 is able to act on the radially inwardly facing inner surface of the housing tube 3 under sealing contact. Since the seal 32 in this case is pressed in the annular groove 28, there is also a sealing contact with the boundary surfaces of the annular groove 28, resulting in a fluid-tight seal of the inside of the centering 24 subsequent working chamber 17, 18 relative to the atmosphere results.
- the linear drive 1 could also have a continuous piston rod, so that the rear housing cover 6 is penetrated by the piston rod.
- a rodless design would be possible in which none of the housing cover 5, 6 is penetrated by a piston rod and the power transmission takes place outward, for example by magnetic force or over a longitudinal slot of the housing tube 3 therethrough.
- the boundary surfaces of the annular groove 28 are not all formed on the housing cover 5, 6. Only the inner groove flank 35 and the groove base 33 are an integral part of the centering section 24.
- the centering section 24 is outwardly contoured circular cylindrical and in this case in the axial
- the groove base 33 is formed by the outer surface of a cylindrical end portion 37 of the centering 24, which extends to the centering section 24 final, the other housing cover facing axial end face 38 of the respective centering section 24 extends.
- the inner groove flank 35 is formed by an annular step which defines the transition between the cylindrical end portion 37 and the above-mentioned attachment portion 25.
- the attachment portion 25 thus has a slightly larger diameter than the end portion 37th
- centering 24 is from the side of the housing tube 3 forth - so forth from the opposite housing cover - coaxially a cap part 42 attached. This is - if necessary detachably - on the housing cover 5, 6 and in particular on the centering lo sec- tion 24 fixed and has an end face 43 which axially opposite the inner groove flank 35 at a distance and defines the outer groove flank 36.
- the cap member 42 and the housing cover 5, 6 are thus two separate components, which are manufactured independently i5 and then joined together. Both parts can be made without cutting, in particular by injection molding, without the need for a subsequent machining in the region of the annular groove 28. Therefore, a cost-effective production is possible.
- the housing cover 5, 6 expediently consists of a fiber-reinforced plastic material which is preferably reinforced by glass fibers
- the cap part 42 is produced, in particular, from an unreinforced thermoplastic material. Both parts can be injection molded
- annular seal 32 can be mounted in principle after the assembly of housing cover 5, 6 and cap member 42.
- a pertinent assembly that the seal 32 before the attachment of the cap member 42 on the 0 groove base 33 defining portion of the cylindrical Endabiteses 37 is pushed axially. This has the advantage that it does not have to be stretched radially and thus the risk of overuse during assembly is reduced.
- the cap member 42 includes a substantially cylindrically shaped lateral peripheral wall 44 which is delimited axially on the one hand by the end surface 43 forming the outer groove flank 36 and to which a preferably disc-shaped bottom wall 45 adjoins axially in the other end extends to the longitudinal axis 23 rectangular plane.
- the construction is similar to a cap.
- the cap part 42 is attached with the end face 43 ahead of the centering section 24, which is overlapped here by the lateral peripheral wall 44 radially outward in the axial direction.
- the design is particularly such that the lateral peripheral wall 44 rests with its inner circumference on the outer circumference of the cylindrical end portion 37.
- the embodiment is preferred in which the attachment exclusively in the context of a plug-in operation in the axial direction according to arrow 46 takes place.
- the Aufsteckweg is limited by the fact that the bottom wall 45 comes to the end face 38 to the plant.
- the bottom wall 45 is thus axially upstream of the centering 24 and is suitably on the end face 38 of the centering 24 at.
- the lateral peripheral wall 44 may be formed annularly closed in its circumferential direction, ie around the longitudinal axis 23.
- the segmentation realized in the exemplary embodiment is recommended.
- the peripheral wall 44 is divided into a plurality of circumferentially consecutive and spaced apart wall segments 48 by circumferentially spaced slot-like spaces 47 extending from the bottom wall 45 and extending to the end surface 43.
- the wall segments 48 are elastically bendable with respect to the bottom wall 45 in the radial direction. They can therefore be radially deformed for the purpose of connecting the cap member 42 to the housing cover 5, 6. This is used in the exemplary embodiment for obtaining a latching connection between the cap part 42 and the housing cover 5, 6.
- the wall segments 48 have a radially inwardly projecting latching projection 52.
- a plurality of pairs in the circumferential direction juxtaposed wall segments 48 are each equipped with such a latching projection 52, wherein between successive pairs of such wall segments 48 each a wall segment 48 without latching projection 52 is.
- the cap member 42 in the embodiment has four pairs of wall segments 48, each with a latching projection 52nd
- each of these latching recesses 53 has a length dimensioned in the circumferential direction of the end section 37 such that it is possible for the latching projections 52 to receive a pair of wall segments 48 therein.
- the distribution of the latching depressions 53 also corresponds to the distribution of the pairs of wall segments 48 provided with latching projections 52.
- Locking projections 52 of the various pairs of wall segments 48 in each one of the locking recesses 53 provided therefor One can speak of a snap.
- the cap member 42 is fixed axially immovable on Zen- lo trier section 24. Since the locking recesses 53 each extend only over a partial length of the circumference of the end portion 37, one also achieves an anti-rotation between cap member 42 and centering 24.
- the relative to the longitudinal axis 23 Drehwinkelläge between cap member 42 i5 and housing cover 5, 6 is fixed so immutable.
- the described type of locking is particularly advantageous, but can also be carried out in other ways.
- cap part 42 it is possible to glue the cap part 42 to the housing cover 5, 6 or to fix it by other fastening means.
- the cap part 42 can also be replaced by the housing
- Housing tube 3 are secured in position on the housing cover 5, 6.
- a housing tube 3 with over the entire length 0 constant internal cross section is used.
- - see embodiment - is the axially facing away from the centering 24 outer end surface 54 of the cap member 42 - which also extends over the bottom wall 45 away - completely free and uncovered.
- no component of the housing tube 3 protrudes radially in front of this outer end face 54.
- the outer end face 54 is used as an impact surface 55 for the drive piston 8.
- the drive piston 8 can impinge on it when it arrives in the corresponding end position as part of its working movement 22.
- the cap member 42 is made of a more resilient material such as the housing cover 5, 6, in this way the intensity of the impact can be reduced. It is also possible, what is not shown further, to use the cap part 42 as a carrier for rubber-elastic buffer means which further dampens the final impact of the drive piston 8.
- both housing covers 5, 6 extends to the longitudinal axis 23 coaxial recess 56 which forms a part of the control channel 14, 15 and the above the assigned
- Mouth region 16 to the adjacent working chamber 17, 18 is open.
- the front housing cover 5 is axially penetrated by its recess 56 and penetrated by the piston rod 12.
- the recess 56 of the rear housing cover 6 may be formed blind hole-like for lack of hin man Struktur piston rod as shown and closed at the inner mouth region 16 opposite side by a bottom housing 57 formed by the rear cover 6.
- the pressure medium can thus pass through the cap part 42 to act on the drive piston 8.
- the cap part 42 on the housing cover 5, 6 it expediently has a sleeve-shaped axial extension 62, which is fixed at one end to the bottom wall 45 and projects coaxially therefrom, whereby it projects with a front end surface 63 opposite the bottom wall 45 ends.
- the axial extension 62 projects through the inner mouth region 16 into the recess 56, wherein the cross section of the recess 56 and the outer contour of the axial extension 62 are matched to one another such that the axial extension 62 is supported radially by the inner circumferential surface 64 of the recess 56 is.
- the cap member 42 is supported over a large length transversely to the longitudinal axis 23 with respect to the housing cover 5, 6 and can not tilt even in heavy impact of the drive piston 8 or change its position in a different way.
- the space enclosed by the axial extension 62 adjoins the bottom opening 58 directly. At one or more locations, the wall of the axial extension 62 is pierced to provide fluid communication between its interior space and the outer mouth portion 14a, 15a of the associated control passage 14, 15 to which the above-mentioned fluid lines can be connected.
- the two housing covers 5, 6 associated cap parts 42 differ in the length and design of their axial extensions 62. In both cases, the sleeve-shaped Axial projections 62, however, open at both ends, wherein the front end face 63 of the bottom opening 58 axially opposite front opening 65 bounded.
- the sleeve-shaped axial extension 62 terminates in the recess 56 before the mouth of the outer mouth region 15a (FIG. 11).
- the pressure medium can therefore flow according to double arrow 66 through the front opening 65 between the outer mouth region 15a and the subsequent working chamber 18.
- the front opening 65 is at least largely blocked by the piston rod 12 passing through the axial extension 62 and is therefore not available for fluid passage.
- the peripheral wall of the axial extension 62 distributed in the circumferential direction is provided with a plurality of slot-shaped radial perforations 67, which create a fluid connection between the interior of the axial extension 62 and the associated outer mouth region 14a.
- the slot-like apertures 67 are formed between the intermediate spaces between a plurality of connecting webs 68, which extend axially between the bottom opening 58 and a ring portion 72 of the axial extension 62 spaced apart coaxially in front of the bottom wall 58.
- they are each integrally connected to the bottom wall 45 and the ring portion 2s 72. They are - in particular uniformly distributed in the circumferential direction of the axial extension 62.
- the connecting webs 68 may extend axially over the entire annular portion 72. In the area of the ring section 72, the spaces between groove-like connecting webs 68 form in the circumferential direction Recesses 67 a, which adjoin each one of the slot-like openings 67.
- the cap parts 42 for the two housing covers 5, 6 are expediently of the same design. Therefore, the cap part 62 for the rear housing cover 6 also has the configuration just described with connecting webs 68 and ring section 72 borne by these. In both cap parts 42, the front end face of the axial extension 62 is located on the annular section 72.
- the groove-like depressions 67a also allow, in addition to the fluid flow 66, a peripheral fluid flow through the region lying radially between the annular section 72 and the inner circumferential surface of the recess 56, so that the pressure medium between the outer mouth region 15a and the slot-like openings 67 can flow over.
- the - ring portion 72 in the cap portion 42 of the rear housing cover 6 essentially only a stabilizing function.
- the annular portion 72 forms a piston bearing 12 coaxially enclosing slide bearing 73 for linear guidance of the piston rod 12th
- the ring bearing 72 defining the sliding bearing 73 is provided on its inner periphery with a plurality of longitudinal grooves 74 distributed in the circumferential direction, by means of which the inner peripheral surface of the annular section 72 is subdivided into a plurality of circumferentially distributed strip-shaped sliding bearing surfaces 75.
- the sliding bearing 73 is located not over the entire circumference of the piston rod 12, but only in individual, spaced successive peripheral portions.
- the segmentation of the sliding bearing 73 into individual sliding bearing surfaces 75 facilitates inter alia also the production of the preferably integral one-piece cap part 42. In injection molding production, a particularly high dimensional accuracy results.
- the cap portion 42 of the front housing cover 5 still exert a third major function, which is a piston rod 12 concentrically enclosing annular scraper 76 in the recess 56 of front housing cover 5 to fix axially.
- the scraper 76 is the front end surface 63 of the axial extension 62 upstream and trapped between the latter and an annular step 77 at the front exit region of the recess 56 axially.
- the assembly takes place in such a way that first the scraper 76 and then the cap part 42 are inserted over the mouth region 16, the latter being able to advance the scraper 76 up to the end position at the step 77.
- the scraper 76 rests against the outer circumference of the piston rod 12 and wipes off impurities when the piston rod 12 moves into the drive housing 2.
- the cap part 42 is expediently overall a one-piece component.
- the inner contour of the axial extension 62 is expediently stepped in the transition region 79 to the annular section 72, so that the cross section enclosed by the annular section 72 is smaller than the adjoining and up to the bottom opening 58 continuous longitudinal section. In conjunction with a piston rod 12 can thus be ensured that except the slide bearing surfaces 75 no further components of the cap member 42 with the piston rod 12 come into contact.
- the slot-like openings 61 emerge as recesses 78 distributed over the circumference. You increase the Strötnungsquerrough for the pressure medium used to operate the linear actuator 1.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2007/006399 WO2009010083A1 (en) | 2007-07-19 | 2007-07-19 | Fluid-actuated linear drive |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2047115A1 true EP2047115A1 (en) | 2009-04-15 |
EP2047115B1 EP2047115B1 (en) | 2011-12-21 |
Family
ID=39209014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07786171A Not-in-force EP2047115B1 (en) | 2007-07-19 | 2007-07-19 | Fluid-actuated linear drive |
Country Status (5)
Country | Link |
---|---|
US (1) | US8240243B2 (en) |
EP (1) | EP2047115B1 (en) |
CN (1) | CN101755132B (en) |
AT (1) | ATE538316T1 (en) |
WO (1) | WO2009010083A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD846223S1 (en) * | 2015-06-24 | 2019-04-16 | Can Do Logistics Llc | Air transfer device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3850080A (en) * | 1973-03-28 | 1974-11-26 | Eaton Corp | Seal for non-bottoming piston cylinder assembly |
US4167134A (en) * | 1977-02-28 | 1979-09-11 | Yuda Lawrence F | Compact fluid actuator |
FR2622672B2 (en) | 1986-04-24 | 1990-02-23 | Telemecanique Electrique | ELBOW PNEUMATIC CONNECTION PROVIDED WITH UNIDIRECTIONAL FLOW ADJUSTMENT MEANS |
DE3807889A1 (en) | 1988-03-10 | 1989-09-21 | Festo Kg | Slide-like feed device which can be actuated by pressure medium |
CN1075351A (en) * | 1992-02-12 | 1993-08-18 | 冯建光 | Solid-fuel internal combustion engine |
DE4311997C2 (en) * | 1993-04-13 | 2001-07-12 | Sauer Sundstrand Gmbh & Co | hydraulic motor |
JP2607837B2 (en) | 1994-03-30 | 1997-05-07 | シーケーディ株式会社 | Rodless cylinder seal structure |
JP3160891B2 (en) * | 1997-04-29 | 2001-04-25 | 豊和工業株式会社 | Seal band mounting structure |
DE10049439A1 (en) | 2000-10-06 | 2002-04-18 | Festo Ag & Co | Sleeve-type bearing element for piston rod of working cylinder, is located in passage of working cylinder housing and coaxially encloses the piston rod, also has guide bush, ring-shaped wiper and seal combined to form a unit |
-
2007
- 2007-07-19 AT AT07786171T patent/ATE538316T1/en active
- 2007-07-19 EP EP07786171A patent/EP2047115B1/en not_active Not-in-force
- 2007-07-19 WO PCT/EP2007/006399 patent/WO2009010083A1/en active Application Filing
- 2007-07-19 US US12/309,238 patent/US8240243B2/en not_active Expired - Fee Related
- 2007-07-19 CN CN2007800538366A patent/CN101755132B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2009010083A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE538316T1 (en) | 2012-01-15 |
CN101755132A (en) | 2010-06-23 |
WO2009010083A1 (en) | 2009-01-22 |
CN101755132B (en) | 2013-05-22 |
EP2047115B1 (en) | 2011-12-21 |
US8240243B2 (en) | 2012-08-14 |
US20090288553A1 (en) | 2009-11-26 |
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