US3656593A - Continuously adjustable lifting devices - Google Patents

Continuously adjustable lifting devices Download PDF

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Publication number
US3656593A
US3656593A US881436A US3656593DA US3656593A US 3656593 A US3656593 A US 3656593A US 881436 A US881436 A US 881436A US 3656593D A US3656593D A US 3656593DA US 3656593 A US3656593 A US 3656593A
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United States
Prior art keywords
casing
chamber
lifting device
housing
piston
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Expired - Lifetime
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US881436A
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English (en)
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Fritz Bauer
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A47B9/10—Tables with tops of variable height with vertically-acting fluid cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/0209—Telescopic
    • F16F9/0245—Means for adjusting the length of, or for locking, the spring or dampers

Definitions

  • ABSTRACT provides a lifting device or displacement controlling and locking device for height adjustment of table tops and other members.
  • the device comprises a double tubular housing having in the inner tube a piston the position of which is controllable and lockable by controlling flow of fluid from one side of the piston to the other through a by-pass passage provided between the inner and outer tubes.
  • a blocking device at one end of the housing is operable to allow the bypass flow when height adjustment is required.
  • the invention relates to a lifting device for the stepless height adjustment of table tops, chair seats and the like.
  • a lifting device chosen out of a plurality of lifting devices and forming the basis of the invention consists of a tubular housing having a gas and/or liquid filling, with an axially displaceable piston sealed in relation to it and provided on a rod, plunger or the like which sealingly extends out of one end of the housing, and a locking device operable from the outside, for locking an adjusted position is provided in the flow opening for the housing contents, connecting the housing chamber in front of the piston with the housing chamber behind the piston.
  • Such a lifting device e.g. known from German utility model specification 1,960,813 has the advantage that the displacement path for the table top, the chair seat or the like corresponds practically to the clear overall length of the tubular housing.
  • the rod, the plunger or the like connected with the piston and extending out of the housing is connected in the usual way with its free end or their free ends to the table top or on to the chair seat or the like, and the end of the housing remote from the piston rod is built fixedly into the table frame or into the base of the chair or the like.
  • the locking device which locks the instantaneous position of the table top or of the chair seat is opened, so that the contents of the housing instead of acting against the displacing movement, can flow through the flow opening from one housing chamber into the other housing chamber so that depending on the piston movement, one of the housing chambers increases in volume and the other housing chamber decreases in volume.
  • both housing chambers together correspond in their volume always with the constant total contents of the housing of the lifting device.
  • the flow opening with the locking device is built into the axially displaceable piston which is sealed relative to the inner wall of the housing. Opening and closing of the flow opening is effected by means of a slide which controls an axial opening of the piston.
  • the slide is moved by an actuating rod which is displaceable in the hollow piston rod which is adjustable e.g. by a lever linkage at its free end. It is very difficult to seal the slide.
  • Such a construction is.
  • the piston of the known lifting device requires a special hub for providing the necessary radial bores which open into the axial bore, and for fixing of the hollow piston rod.
  • the displacement path is shortened by the height of this hub however, so that the clear overall length of tl-le housing is not inconsiderably larger than the displacement path of the lifting device, quite apart from the fact that the latter also requires considerable structural expense and imposes difficult sealing conditions.
  • a lifting device which is extremely simple in construction is known, e.g. from German utility model specification 1,924,528, which has a locking device which is easy to seal, and a solid piston rod.
  • the tubular housing is however subdivided into three housing chambers one of which is provided between the flat end face of the piston provided with the solid piston rod and a fixed separating wall, the second housing chamber serves as the supply chamber and is disposed between the latter and an axially displaceable separating piston and the third housing chamber is simply filled with pressure gas and is disposed between the separating piston and a plug closing the housing at the adjacent end.
  • the separating wall is bridged by means of a flow channel which can be closed by means of a tap valve in order to be able to bypass the pressure liquid in the housing chamber lying in front of the piston into the housing chamber lying behind the fixed separating wall, or reversely, for effecting the displacement in height.
  • an axial bore is also provided which is automatically influenced by a valve plate so as to be able to fill the housing chamber on the piston rod side with pressure fluid or empty it through the piston.
  • the known lifting device thus has a clear housing length which is considerably greater than the actual stroke or largest displacement path. Consequently, its range of use is essentially restricted. More particularly however, the building in of this lifting device is made extremely complicated or is made practically impossible, by the bypass channel with locking device arranged outside the housing, since in a telescopically constructed table or chair base, insufficient space is available for these separate outwardly projecting components. Also, the axially displaceable separating piston and the fixedly built in separating wall represent an additional structural and working expense which unfavorably influences the manufacture, so that also this known lifting device is not satisfactory.
  • the object of the invention is to construct the known lifting device for the stepless height adjustment of table tops, chair seats and the like, with a gas and/or liquid filled housing for receiving an axially displaceable piston on an outwardly guided rod and with a blocking device operable from the outside and arranged in a flow opening connecting the housing chamber in front of the piston with the housing chamber behind the piston, in such a way that with a practically complete utilisation of the clear housing length as the displacement path, a considerably simpler construction with individual components which are easy to seal and manufacture, is enabled.
  • this object is achieved in an advantageous manner, in that the blocking device is arranged in the end of the housing lying opposite to that in which the guiding and sealing means for the piston rod are provided, and that a by-pass chamber surrounding the housing and extending along the entire length thereof is connected to the flow open ing for connecting the housing chamber in front of the piston with the housing chamber behind the piston.
  • the blocking device is arranged in a double base of the housing and is formed by a release pin which is guided so as to extend outwardly and which can be axially displaced from the outside, the pin having a head at its inner end and being guided in seals in oppositely lying regions of the two base portions of the double base, which between them include a by-pass chamber, the pin having a peripheral groove between the seals, the groove having two frusto-conical side walls widening outwardly, the inner base of the said double base having a bore on the housing side of the seal, which is greater in diameter than the diameter of the pin and which opens into the housing chamber.
  • the housing is in this case formed by two steel tubes which are concentric and pushed one into the other, defining the radial width of the by-pass chamber by their different diameters, the outer steel tube being connected by one end to the periphery of the outer base of the double base, and the other steel tube being connected to the appropriately stepped periphery of the inner base of the double base, the other oppositely lying ends being fixed in a similar manner gas and liquid tightly to the plug receiving the seals for the rod, plunger or the like of the piston.
  • the plug has an annular chamber connected with the housing chamber behind the piston, which is connected through at least one radial bore with the by-pass chamber extending beyond the fixing position of the inner steel tube onto the plug.
  • the bypass region extending somewhat into the inner base from between the two base portions of the double base is connected by at least one axial bore with the by-pass chamber formed between the two steel pipes of the housing.
  • a lifting device which is externally smooth on all sides and which consequently can be conveniently installed, the overall structural length of which only slightly exceeds the displacement path of the piston rod, or of the plunger or the like.
  • the lifting device constructed according to the invention has a simple disc-shaped piston having a seal only on its outer periphery, which can be secured by means of a suitable bore, on a stud portion of the solid piston rod, plunger or the like, in a simple manner without unfavourably influencing the available displacement path.
  • the blocking device which is readily operable from below in the conventional manner by means of a lever linkage, comprises a release pin the dimensions of which are not subject to any precise limits and which nevertheless can be easily sealed.
  • a further essential advantage is that with pressure gas filling of the housing, the addition of a small amount of oil as lubricant is sufficient, since in the lifting device when it has been built into its place of use, the piston rod always extends downwardly towards the floor so that the oil or lubricant remains in the lower part of the housing under the action of gravity.
  • the lifting device has a long life duration. Since its individual components have a simple shape which does not distort on subsequent treatment, e.g. hardening, or in which a slight change in shape would be without deleterious effect, the manufacture of the device is extremely economic.
  • Each hydraulic or hydro-pneumatic lifting device forming the basis of the invention comprises a housing 11 which essentially consists of two concentrically disposed steel tubes 12 and 13 of different diameters. At one end the housing is gas or liquid tightly closed by a double base 14 and at the other end by a plug 15.
  • a piston 16 is axially displaceably guided, and the piston is fixed by means of a hollow stud 17 onto a piston rod 18, a plunger or the like which extends in a gas or liquid tight manner through the plug.
  • the double base comprises two individual base portions 19 and 20 which enclose between them a by-pass or deflectlon region 21, the greater part of the deflection region being disposed in the outer base portion 19 and only a small part of the deflection region 21 extends into the inner base portion 20.
  • a releasing pin 22 is axially displaceably guided in a sealed manner, coaxially in the two base portions, its inner end having a head 23 serving as an abutment the pin extending with its other end outwardly from a boss 24 of the outer base portion 19, which is preferably provided with an external thread.
  • the outwardly extending end of the pin 22 is arranged for engagement by a lever linkage in the form of a double armed lever which serves as an actuating element for axial displacement of the release pin, the boss 19 of the outer base portion serving for abutment on a boss, a projection or the like of a table top, chair seat or other plate like member.
  • Both base portions 19 and 20 have cylindrical pot-shaped recesses 25 or 26 in their sides which face each other, the margins 26 of the openings which face each other being widened towards the inside, in a somewhat frusto-conical manner.
  • the cylindrically extending part has a depth which corresponds to the height extending parallel to the longitudinal axis of a sealing ring 27 with an ideal rectangular cross-section.
  • the ring surface facing the deflection region 21, of each sealing ring is notched substantially v-shaped in cross-section so that the inner ring wall which surrounds and guides the release pin 22 is considerably smaller in height than the outer ring wall of each sealing ring.
  • each sealing ring serves not only for sealing but also additionally for guiding the release pin, the bore receiving the release pin in the outer base portion having a diameter which ensures a sliding or displacing of the release pin.
  • the release pin 22, which essentially forms the blocking device for the housing chamber 28 lying in front of the piston 16, has an annular groove 29 disposed between the regions engaged by the two sealing rings 27.
  • the groove 29 has frustoconically shaped outwardly extending side walls 30.
  • the annular groove 29 co-operates with an axial bore 31 provided in the inner base portion 20 next to the respective seal of the release pin, and opens into the housing chamber 28.
  • This bore 31 has a somewhat larger diameter than the shank diameter of the release pin which passes coaxially through this bore. If for the height adjustment of the lifting device, the release pin is pushed into the housing, then the housing contents, under the action of the piston movement, flow through this bore 31 into the deflection chamber 21 through the open annular groove 29 which is now adjoining.
  • the inner steel tube 12 carrying the piston 16 is arranged with its end facing the blocking device gas and liquid tightly disposed on a reduced diameter peripheral portion 32 of the inner base portion 20, if desired with the use of a sealing ring 33.
  • the by-pass chamber 34 is connected by at least one axial flow opening 36 in the inner base portion 20 of the double base 14, with the part of the deflection chamber 21 which extends somewhat into this, through which any of the contents of the housing present in the deflection chamber and standing under pressure, passes into the by-pass chamber.
  • the outer base portion 19 may for example be provided with a threaded closure 37.
  • the plug 15 is stepped to the inner diameter of the inner steel tube 12 so that a centralizing region 38 results, which extends into the inner steel tube.
  • the outer steel tube 13 extends over the outer periphery of the plug which is common to both steel tubes, and is secured to this in a gas and liquid tight manner.
  • the bore in the plug carrying the piston rod 18, the plunger or the like is provided with a seal 39 in which the piston rod 18 is slidingly sealed.
  • the bore 40 which extends towards the inside of the housing at the inner end of the plug has a larger diameter than the piston rod, plunger or the like, so that the pressure medium can flow out of the expansion chamber formed as an annular groove 41 in the plug, into the housing chamber 42 disposed behind the piston 16.
  • the by-pass chamber 34 is extended beyond the fixing point of the inner steel tube 12 formed by the centralizing portion 38, so that the by-pass chamber 34 can be connected with the annular chamber 41 constituting the expansion chamber in the plug, by at least one radial bore 43.
  • the blocking device is opened by pushing a release pin 22 into the housing.
  • the piston 16 drives the housing contents disposed in front of the piston, through the deflection chamber 21 and through the flow opening 36 into the by-pass chamber 34 and from there through the radial bores 43 into the annular chamber 41 of the plug 15, from where it can pass through the axial bore 40 into the housing chamber 42 behind the piston.
  • the blocking device is again closed, whereupon due to the loading of the housing contents, for example compressed gas, tHe table top or the chair seat is locked in the new position.
  • a continuously adjustable lifting device for table tops, chair seats or the like comprising a tubular casing containing a gas and/or liquid filling, a rod plunger means sealed in and protruding from an end of said casing, a blocking device operable from outside said casing and being arranged at the other end of said casing for locking said rod plunger means relative to said casing in an adjustable position, said blocking device provided in an overflow opening for the filling of the casing connecting the casing space before the plunger to the casing space behind the plunger, the blocking device (22,23,29,31) comprising a release pin (22) arranged on the longitudinal axis of the casing (11), said pin being axially displaceable from outside the casing and having at its inner end a head (23) controlling an axial bore (31) of said blocking device, said pin thereof being guided in two base portions (19,20) which include a deflector chamber (21) between them, said base portions bounding the corresponding end of the casing, (11) said casing consisting of two
  • a lifting device wherein the pin is provided between seals with an annular groove (29) having two outwardly widening truncated conically shaped side walls (30), the inner base portion (20) having a coaxial bore (31) adjoining the respective seal and of a diameter greater than that of the shank of the release pin.
  • a lifting device wherein the firstmentioned ends of the tubes are connected in substantially similar manner to a plug (15) which is common to both tubes and which carries a seal (39) for the piston rod (18), plunger or the like of the piston (16), all of the connections being constructed and arranged in a gas and liquid-tight manner.
  • a lifting device according to claim 1, wherein the plug (15) is connected by at least one of said radial bores (43) with the by-pass chamber (34) extending beyond the fixing region of the inner steel tube (12) on the plug (15).
  • a lifting device according to claim 1, wherein the deflector chamber (21) extends into the inner base portion (20) and between the two base portions (19,20) of the double base portions (14) and is connected by at least one axial bore (31) with the bypass chamber between the two steel tubes (12), (13) ofthe housing (11).
  • a lifting device wherein the release pin is guided by seals (22) in the base portions, said seals being formed by a sealing ring with a rectangular cross-section extending parallel to the axial direction, the ring surface facing the deflector chamber (21) being recessed in substantially V- shaped in such a way that the inner ring wall surrounding the release pin has a lesser height than the outer ring wall for reducing friction.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chairs Characterized By Structure (AREA)
  • Fluid-Damping Devices (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
US881436A 1968-12-03 1969-12-02 Continuously adjustable lifting devices Expired - Lifetime US3656593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1812282A DE1812282C3 (de) 1968-12-03 1968-12-03 Hubvorrichtung zum stufenlosen Höhenverstellen von Tischplatten, Stuhlsitzen u.dgl.

Publications (1)

Publication Number Publication Date
US3656593A true US3656593A (en) 1972-04-18

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ID=5715014

Family Applications (1)

Application Number Title Priority Date Filing Date
US881436A Expired - Lifetime US3656593A (en) 1968-12-03 1969-12-02 Continuously adjustable lifting devices

Country Status (8)

Country Link
US (1) US3656593A (enrdf_load_stackoverflow)
JP (1) JPS4946873B1 (enrdf_load_stackoverflow)
AT (1) AT287960B (enrdf_load_stackoverflow)
CH (1) CH504855A (enrdf_load_stackoverflow)
DE (1) DE1812282C3 (enrdf_load_stackoverflow)
FR (1) FR2025110A1 (enrdf_load_stackoverflow)
GB (1) GB1237989A (enrdf_load_stackoverflow)
SE (1) SE371094C (enrdf_load_stackoverflow)

Cited By (44)

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US3744844A (en) * 1970-07-24 1973-07-10 Nissan Motor Adjustable seat having a hydro-pneumatic spring mechanism
US3787019A (en) * 1971-04-06 1974-01-22 Stabilus Ind Handels Gmbh Supporting element of adjustable length
US3790119A (en) * 1971-08-31 1974-02-05 F Bauer Energy storing device, particularly a blockable pneumatic spring
US4093196A (en) * 1976-08-26 1978-06-06 Suspa Federungstechnik Fritz Bauer & Sohne Ohg Length-adjustable gas spring
DE2810276A1 (de) * 1978-03-09 1979-09-20 Kirschbaum Albrecht Von Stuhl, insbesondere arbeitsstuhl
US4283033A (en) * 1978-08-22 1981-08-11 Suspa Federungstechnik, Fritz Bauer & Sohne Ohg Apparatus for securing chair or table columns to the underside of chair seats, table tops or the like
US4318536A (en) * 1979-02-23 1982-03-09 Fritz Bauer & Sohne Ohg Axially adjustable pneumatic spring
US4386766A (en) * 1979-10-20 1983-06-07 Fritz Bauer & Sohne Ohg Lengthwise adjustable gas spring
US4555085A (en) * 1981-11-17 1985-11-26 Fritz Bauer Lockable tilting apparatus for chair seats
US4728084A (en) * 1985-08-31 1988-03-01 Fritz Bauer And Sohne Ohg Adjustable-length gas spring
US4779851A (en) * 1986-01-28 1988-10-25 Fritz Bauer & Sohne Ohg Adjustable-length gas spring with permanent release mechanism
US4786108A (en) * 1986-10-16 1988-11-22 Burositzmobelfabrik Friedrich-W. Dauphin Gmbh & Co. Chair, in particular office chair, with a vertically adjustable back rest support
US4824081A (en) * 1985-03-22 1989-04-25 Grazina J. Pauliukonis Pistonless-plunger positioner with internal cylinder and annular fluid space
US4844392A (en) * 1986-11-18 1989-07-04 Fritz Bauer + Sohne Ohg Gas spring adjustable in length for vertically adjustable chairs, tables and the like
US4871149A (en) * 1985-08-28 1989-10-03 Airax Lockable pneumatic spring
US4949941A (en) * 1988-07-23 1990-08-21 Fritz Bauer + Sohne Ohg Longitudinally controllable adjustment device
US4979718A (en) * 1983-07-29 1990-12-25 Suspa Compart Aktiengesellschaft Lockable elevating mechanism for the continuous adjustment of seats, table tops or similar items of furniture
US5096029A (en) * 1988-07-23 1992-03-17 Suspa Compart Ag Longitudinally controllable adjustment device
US5188345A (en) * 1991-05-01 1993-02-23 Suspa Compart Aktiengesellschaft Lockable elevating mechanism for the continuous adjustment of chair seats
US5269398A (en) * 1990-09-25 1993-12-14 Suspa Compart Ag Longitudinally adjustable gas spring and elevating mechanism with such gas spring
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US5295731A (en) * 1991-04-20 1994-03-22 Friedrich W. Dauphin Gmbh & Co. Entwicklungs- Und Beteiligungs-Kg Chair, in particular office chair
US5326155A (en) * 1991-03-08 1994-07-05 Friedrich W. Dauphin Gmbh & Co. Entwicklungs- Und Beteiligungs-Kg Back rest for a chair
US5388677A (en) * 1992-08-07 1995-02-14 Suspa Compart Ag Unit of a piston and a piston rod
US5447357A (en) * 1992-08-21 1995-09-05 Dauphin Entwicklungs- U. Beteiligungs-Gmbh Chair with inclinable seat
EP0707160A1 (de) 1994-07-28 1996-04-17 SUSPA COMPART Aktiengesellschaft Längenverstellbare Gasfeder für Stühle, Tische o.dgl.
US5516082A (en) * 1993-06-25 1996-05-14 Talleres Gain, S. Coop. S.L. Gas cylinder
US5564783A (en) * 1993-07-22 1996-10-15 Duphin Entwicklungs-U. Beteiligungs-Gmbh Chair, in particular office chair
US5570873A (en) * 1994-06-16 1996-11-05 Suspa Compart Aktiengesellschaft Longitudinally adjustable gas spring with a longitudinally adjustable column
US5988605A (en) * 1997-04-09 1999-11-23 Suspa Compart Aktiengesellschaft Adjustable length gas spring
EP0967408A2 (de) 1998-06-22 1999-12-29 Suspa Compart Aktiengesellschaft Längenverstellbare Gasfeder
DE10049480C2 (de) * 2000-10-06 2002-12-05 Dauphin Friedrich W Gmbh Stuhl, insbesondere Bürostuhl
US6581919B2 (en) * 2001-08-20 2003-06-24 Eko Sport, Inc. Shock absorbing seat post
EP1325694A2 (de) 2002-01-08 2003-07-09 Dauphin Entwicklungs- u. Beteiligungs GmbH Stuhl, insbesondere ein Bürostuhl
US20040061266A1 (en) * 2002-09-21 2004-04-01 Suspa Compart Gmbh Adjustable-length compression spring
US6736380B2 (en) 2001-12-24 2004-05-18 Suspa Holding Gmbh Adjustable-length gas spring
US20040174057A1 (en) * 2003-03-07 2004-09-09 Dauphin Entwicklungs-U. Beteiligungs Gmbh Chair, in particular office chair
US20060129608A1 (en) * 2004-11-25 2006-06-15 Hitachi, Ltd. Storage system
DE102007003407B3 (de) * 2007-01-23 2008-06-19 Suspa Holding Gmbh Dämpfer
US7467774B2 (en) 2004-01-24 2008-12-23 Stable Ii S.A.R.L Adjustable-height chair column
DE102008061213A1 (de) 2008-12-09 2010-06-10 Suspa Holding Gmbh Längenverstellbare Gasfeder
DE102009038319A1 (de) 2009-08-21 2011-02-24 Dauphin Entwicklungs- U. Beteiligungs-Gmbh Stuhl
US20110084105A1 (en) * 2008-05-09 2011-04-14 Tormaxx Gmbh Mounting
US20150137436A1 (en) * 2013-11-20 2015-05-21 Hahn Gasfedern Gmbh Spring element

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JPS51114166U (enrdf_load_stackoverflow) * 1975-03-10 1976-09-16
DE2705259C2 (de) * 1977-02-09 1985-08-22 Fritz Bauer + Söhne oHG, 8503 Altdorf Hubvorrichtung zum stufenlosen Höhenverstellen von Stuhlsitzen o.dgl.
JPS55112576U (enrdf_load_stackoverflow) * 1979-02-01 1980-08-07
JPS5752519U (enrdf_load_stackoverflow) * 1980-09-12 1982-03-26
DE3128723A1 (de) * 1981-07-21 1983-02-10 Fichtel & Sachs Ag, 8720 Schweinfurt Hydropneumatischer zweirohr-schwingungsdaempfer oder federbeineinsatz mit einer verschlusskappe fuer ein behaelterrohr
DE3522722A1 (de) * 1985-06-25 1987-01-08 Otto Guenther Hubvorrichtung zum stufenlosen verstellen von tischplatten, stuhlsitzen, rueckenlehnen von komfort-sesseln und dergleichen
JPS6221386U (enrdf_load_stackoverflow) * 1985-07-25 1987-02-09
JPS6230876U (enrdf_load_stackoverflow) * 1986-07-17 1987-02-24
DE3635243C2 (de) * 1986-10-16 1994-12-22 Buerositzmoebelfabrik Friedric Stuhl, insbesondere Bürostuhl
DE4009034A1 (de) * 1990-03-21 1991-09-26 Suspa Federungstech Laengenverstellbare gasfeder
ES2024193A6 (es) * 1990-04-23 1992-02-16 Talleres Gain S Coop R L Cilindro a gas.
DE4114226A1 (de) * 1991-05-01 1992-11-05 Suspa Compart Ag Laengenverstellbare gasfeder
DE4426846A1 (de) * 1994-07-28 1994-12-15 Suspa Compart Ag Längenverstellbare Gasfeder für Stühle, Tische o. dgl.
DE19515368A1 (de) * 1995-05-02 1996-11-07 Suspa Compart Ag Längenverstellbare Gasfeder
DE29608147U1 (de) * 1996-05-04 1996-08-01 Suspa Compart Ag, 90518 Altdorf Stuhl-Gasfeder
DE19714647A1 (de) * 1997-04-09 1998-10-15 Suspa Compart Ag Kolbenstangen-Zylinder-Einheit
DE19716720B4 (de) * 1997-04-21 2006-03-09 Suspa Holding Gmbh Betätigungs-Einrichtung für eine längenverstellbare Gasfeder
DE10033418A1 (de) 2000-07-08 2002-01-31 Dauphin Friedrich W Gmbh Stuhl, insbesondere Bürostuhl
DE10252711C5 (de) * 2002-11-11 2015-11-05 Suspa Holding Gmbh Längenverstellbare Druckfeder sowie Sitz mit einer derartigen Druckfeder
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DE202004001034U1 (de) * 2004-01-24 2005-06-16 Suspa Holding Gmbh Höhenverstellbare rückdrehende Stuhl-Säule
JP4833794B2 (ja) * 2006-10-26 2011-12-07 花王株式会社 伸縮自在な棒状具
EP1935284A3 (en) * 2006-12-21 2008-08-20 Fumoto Giken Co., Ltd. Operating device
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US3744844A (en) * 1970-07-24 1973-07-10 Nissan Motor Adjustable seat having a hydro-pneumatic spring mechanism
US3787019A (en) * 1971-04-06 1974-01-22 Stabilus Ind Handels Gmbh Supporting element of adjustable length
US3790119A (en) * 1971-08-31 1974-02-05 F Bauer Energy storing device, particularly a blockable pneumatic spring
US4093196A (en) * 1976-08-26 1978-06-06 Suspa Federungstechnik Fritz Bauer & Sohne Ohg Length-adjustable gas spring
DE2810276A1 (de) * 1978-03-09 1979-09-20 Kirschbaum Albrecht Von Stuhl, insbesondere arbeitsstuhl
US4283033A (en) * 1978-08-22 1981-08-11 Suspa Federungstechnik, Fritz Bauer & Sohne Ohg Apparatus for securing chair or table columns to the underside of chair seats, table tops or the like
US4318536A (en) * 1979-02-23 1982-03-09 Fritz Bauer & Sohne Ohg Axially adjustable pneumatic spring
US4386766A (en) * 1979-10-20 1983-06-07 Fritz Bauer & Sohne Ohg Lengthwise adjustable gas spring
US4555085A (en) * 1981-11-17 1985-11-26 Fritz Bauer Lockable tilting apparatus for chair seats
US4979718A (en) * 1983-07-29 1990-12-25 Suspa Compart Aktiengesellschaft Lockable elevating mechanism for the continuous adjustment of seats, table tops or similar items of furniture
US4824081A (en) * 1985-03-22 1989-04-25 Grazina J. Pauliukonis Pistonless-plunger positioner with internal cylinder and annular fluid space
US4871149A (en) * 1985-08-28 1989-10-03 Airax Lockable pneumatic spring
US4728084A (en) * 1985-08-31 1988-03-01 Fritz Bauer And Sohne Ohg Adjustable-length gas spring
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US4786108A (en) * 1986-10-16 1988-11-22 Burositzmobelfabrik Friedrich-W. Dauphin Gmbh & Co. Chair, in particular office chair, with a vertically adjustable back rest support
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US5096029A (en) * 1988-07-23 1992-03-17 Suspa Compart Ag Longitudinally controllable adjustment device
US4949941A (en) * 1988-07-23 1990-08-21 Fritz Bauer + Sohne Ohg Longitudinally controllable adjustment device
US5269398A (en) * 1990-09-25 1993-12-14 Suspa Compart Ag Longitudinally adjustable gas spring and elevating mechanism with such gas spring
US5281002A (en) * 1991-02-27 1994-01-25 Friedrich W. Dauphin Gmbh & Co. Chair, in particular office chair
US5326155A (en) * 1991-03-08 1994-07-05 Friedrich W. Dauphin Gmbh & Co. Entwicklungs- Und Beteiligungs-Kg Back rest for a chair
US5295731A (en) * 1991-04-20 1994-03-22 Friedrich W. Dauphin Gmbh & Co. Entwicklungs- Und Beteiligungs-Kg Chair, in particular office chair
US5188345A (en) * 1991-05-01 1993-02-23 Suspa Compart Aktiengesellschaft Lockable elevating mechanism for the continuous adjustment of chair seats
US5388677A (en) * 1992-08-07 1995-02-14 Suspa Compart Ag Unit of a piston and a piston rod
US5447357A (en) * 1992-08-21 1995-09-05 Dauphin Entwicklungs- U. Beteiligungs-Gmbh Chair with inclinable seat
US5516082A (en) * 1993-06-25 1996-05-14 Talleres Gain, S. Coop. S.L. Gas cylinder
US5564783A (en) * 1993-07-22 1996-10-15 Duphin Entwicklungs-U. Beteiligungs-Gmbh Chair, in particular office chair
US5797653A (en) * 1993-07-22 1998-08-25 Dauphin Entwicklungs - U. Beteiligungs-Gmbh Chair, in particular office chair
US5570873A (en) * 1994-06-16 1996-11-05 Suspa Compart Aktiengesellschaft Longitudinally adjustable gas spring with a longitudinally adjustable column
EP0707160A1 (de) 1994-07-28 1996-04-17 SUSPA COMPART Aktiengesellschaft Längenverstellbare Gasfeder für Stühle, Tische o.dgl.
US5620067A (en) * 1994-07-28 1997-04-15 Suspa Compart Aktiengesellschaft Longitudinally adjustable gas spring with dual layered cylinder
US5988605A (en) * 1997-04-09 1999-11-23 Suspa Compart Aktiengesellschaft Adjustable length gas spring
EP0967408A2 (de) 1998-06-22 1999-12-29 Suspa Compart Aktiengesellschaft Längenverstellbare Gasfeder
US6234461B1 (en) 1998-06-22 2001-05-22 Suspa Compart Aktiengesellschaft Adjustable length gas spring
DE10049480C2 (de) * 2000-10-06 2002-12-05 Dauphin Friedrich W Gmbh Stuhl, insbesondere Bürostuhl
US6581919B2 (en) * 2001-08-20 2003-06-24 Eko Sport, Inc. Shock absorbing seat post
US6736380B2 (en) 2001-12-24 2004-05-18 Suspa Holding Gmbh Adjustable-length gas spring
EP1325694A2 (de) 2002-01-08 2003-07-09 Dauphin Entwicklungs- u. Beteiligungs GmbH Stuhl, insbesondere ein Bürostuhl
US20040061266A1 (en) * 2002-09-21 2004-04-01 Suspa Compart Gmbh Adjustable-length compression spring
EP1403549A3 (de) * 2002-09-24 2004-09-15 SUSPA Holding GmbH Längenverstellbare Druckfeder
US20040174057A1 (en) * 2003-03-07 2004-09-09 Dauphin Entwicklungs-U. Beteiligungs Gmbh Chair, in particular office chair
US20040212235A1 (en) * 2003-03-07 2004-10-28 Dauphin Entwicklungs-U. Beteiligungs Gmbh Chair, in particular office chair
US6945603B2 (en) 2003-03-07 2005-09-20 Dauphin Entwicklungs-U. Beteiligungs Gmbh Chair, in particular office chair
US7036882B2 (en) 2003-03-07 2006-05-02 Dauphin Entwicklings-U. Beteiligungs Gmbh Chair, in particular office chair
US20040174059A1 (en) * 2003-03-07 2004-09-09 Dauphin Entwicklungs-U. Beteiligungs Gmbh Chair, in particular office chair
US7467774B2 (en) 2004-01-24 2008-12-23 Stable Ii S.A.R.L Adjustable-height chair column
US20060129608A1 (en) * 2004-11-25 2006-06-15 Hitachi, Ltd. Storage system
DE102007003407B3 (de) * 2007-01-23 2008-06-19 Suspa Holding Gmbh Dämpfer
US20110084105A1 (en) * 2008-05-09 2011-04-14 Tormaxx Gmbh Mounting
DE102008061213A1 (de) 2008-12-09 2010-06-10 Suspa Holding Gmbh Längenverstellbare Gasfeder
EP2196695A2 (de) 2008-12-09 2010-06-16 SUSPA GmbH Längenverstellbare Gasfeder
DE102009038319A1 (de) 2009-08-21 2011-02-24 Dauphin Entwicklungs- U. Beteiligungs-Gmbh Stuhl
US20150137436A1 (en) * 2013-11-20 2015-05-21 Hahn Gasfedern Gmbh Spring element
CN104653690A (zh) * 2013-11-20 2015-05-27 哈恩气动弹簧有限责任公司 弹簧元件
US9377077B2 (en) * 2013-11-20 2016-06-28 Hahn Gasfedem GmbH Spring element

Also Published As

Publication number Publication date
CH504855A (de) 1971-03-31
FR2025110A1 (enrdf_load_stackoverflow) 1970-09-04
DE1812282A1 (de) 1970-06-18
JPS4946873B1 (enrdf_load_stackoverflow) 1974-12-12
SE371094B (enrdf_load_stackoverflow) 1974-11-11
DE1812282C3 (de) 1981-07-30
DE1812282B2 (de) 1973-10-25
AT287960B (de) 1971-02-10
SE371094C (sv) 1976-05-03
GB1237989A (enrdf_load_stackoverflow) 1971-07-07

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