DE1554257A1 - Hydropneumatic lifting unit, especially for height-adjustable tables and chairs - Google Patents

Hydropneumatic lifting unit, especially for height-adjustable tables and chairs

Info

Publication number
DE1554257A1
DE1554257A1 DE19651554257 DE1554257A DE1554257A1 DE 1554257 A1 DE1554257 A1 DE 1554257A1 DE 19651554257 DE19651554257 DE 19651554257 DE 1554257 A DE1554257 A DE 1554257A DE 1554257 A1 DE1554257 A1 DE 1554257A1
Authority
DE
Germany
Prior art keywords
chamber
rod
piston
chambers
lifting unit
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.)
Pending
Application number
DE19651554257
Other languages
German (de)
Inventor
Reinhard Hoernlein
Otto Tacke
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.)
REINHARD HOERNLEIN KG HOLZ und
Original Assignee
REINHARD HOERNLEIN KG HOLZ und
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 REINHARD HOERNLEIN KG HOLZ und filed Critical REINHARD HOERNLEIN KG HOLZ und
Publication of DE1554257A1 publication Critical patent/DE1554257A1/en
Pending legal-status Critical Current

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
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
    • F15B11/072—Combined pneumatic-hydraulic systems
    • F15B11/076—Combined pneumatic-hydraulic systems with pneumatic drive or displacement and speed control or stopping by hydraulic braking
    • 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
    • F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/216—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • F15B2211/41536—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/455—Control of flow in the feed line, i.e. meter-in control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
    • F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/907—Working member positioned against counterforce by constantly applied motive fluid

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)
  • Chairs Characterized By Structure (AREA)
  • Vehicle Body Suspensions (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Ropes Or Cables (AREA)
  • Actuator (AREA)

Abstract

1123030 Seats REINHARD HORNLEIN K G 12 Nov 1965 [14 Nov 1964 23 Dec 1964 28 Jan 1965 23 Mar 1965 24 Mar 1965] 48147/65 Index F2S 31 [Also in Division B8] A lifting unit, Fig.1, for adjusting the vertical height of a table for chair comprises a cylinder 1 with chambers 2, 3, 4. Chamber 2 contains gas under pressure and is bounded by a floating piston 7. Chambers 3 and 4 contain oil and are separated by a fixed wall 9. A guide 10 with a rod 11 is slidingly arranged in chamber 4. Connection between the chambers 3, 4 is through ports 12, 13 controlled by a slide valve 15 operated manually by a bar 21. In the position shown the chamber 3 is isolated from chamber 4 so that the unit is locked hydraulically. When the valve 15 is moved down so as to connect ports 12, 13 the gas in chamber 2 expands forcing the piston 7 down and transferring oil from chamber 3 to chamber 4, oil also passing from above the guide 10 to below it through a port 22, which may be a throttle port. So that chamber 4 can accommodate the additional oil the rod 11 is forced downwards. The guide 10 may have one or more one-way valves which permit rapid passage of oil during lowering. The chambers 2 and 3 may be separated by a solid or hollow ball 27, Fig.2 (not shown) of resilient material. As shown in Fig. 7 the chambers 2 and 3 may surround the chamber 4 as an outer cylinder. The chambers 2 and 3 may be larger in diameter than the chamber 4, Fig. 8 (not shown). Other types of valve may replace the slide valve 15 to control passage of oil from chamber 3 to chamber 4.

Description

Patentanwalt«Patent attorney "

Dr. O. Loesenbeck Dipl.-Ing. StrackeDr. O. Loesenbeck Dipl.-Ing. Stracke

Dipl.-Ing. Loesenbeck 1554257Dipl.-Ing. Loesenbeck 1554257 U Bielefeld, Hedorder Stnfce UU Bielefeld, Hedorder Stnfce U

P 15 54 257.1 - Beinhard Hörnlein KG.P 15 54 257.1 - Beinhard Hörnlein KG.

Hydropneumatisches Hebeaggregat, insbesondere für höhenverstellbare Tische und Stühle
(Zusatz zu Patent (Patentanmeldung P 14 29 571.7)Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
(Addition to patent (patent application P 14 29 571.7)

Die Erfindung bezieht sich auf ein hydropneumatisches Hebeaggregat, insbesondere für höhenverstellbare Tische und Stühle. Das Hebeaggregat besteht aus einer unter dem Druck eines Gases stehenden zylindrischen Ausgleichskammer und einem von ihr durch eine gleitbar gelagerte Trennwand getrennten, in zwei Hydraulikkammern unterteilten, mit dem Betriebsmedium gefüllten, einen Kolben mit einer Kolbenstange aufnehmenden Hydraulikraum, welche Kammern übereinander angrenzend angeordnet sind, wobei zwischen den beiden Hydraulikkammern als einzige Verbindung in an sich bekannter Weise ein Überströmkanal mit einem über eine Stange betätigbaren Absperrorgan vorgesehen ist. Unter der Wirkung des Gases in der Ausgleichskammer ist die Kolbenstange bei geöffnetem Absperrorgan aus dem Hydraulikraum ausschiebbar und kann durch Schließen des Absperrorgans nach einem bestimmten Ausfahrweg hydraulisch blockiert werden.The invention relates to a hydropneumatic lifting unit, especially for height-adjustable tables and chairs. The lifting unit consists of a pressurized gas standing cylindrical compensation chamber and one separated from it by a sliding partition wall, in two Subdivided hydraulic chambers, filled with the operating medium, accommodating a piston with a piston rod Hydraulic chamber, which chambers are arranged adjacent to one another, with the only one between the two hydraulic chambers Connection is provided in a manner known per se, an overflow channel with a shut-off device which can be actuated via a rod. Under the effect of the gas in the compensation chamber, the piston rod is out of the hydraulic chamber when the shut-off device is open extendable and can be hydraulically blocked by closing the shut-off device after a certain extension path.

In dem Patent (Patentanmeldung P 14 29 571.7) wirdIn the patent (patent application P 14 29 571.7) is

in dem Ausführungsbeispiel ein Hebeaggregat beschrieben, bei dem das Absperrorgan für den. Überströmkanal zwischen den beiden Hydraulikkammerxi als rohrförmiger Schieber ausgebildet ist, der den Zylinder mit der Ausgleichskammer und den Hydraulik-In the exemplary embodiment, a lifting unit is described in which the shut-off device for the. Transfer channel between the two Hydraulikkammerxi is designed as a tubular slide that connects the cylinder with the compensation chamber and the hydraulic

im Bereich des Überströmkanals umschließt. 009810/0837 encloses in the area of the overflow channel. 009810/0837

(M 7 ti 41*2 Nr. t Satz 9 dw&Kfanmg«··. v. 4.9.1967}(M 7 ti 41 * 2 no. T sentence 9 dw & Kfanmg «··. Of 4.9.1967}

Der Erfindung liegt die Aufgabe zugrunde, die Mittel zur Erzielung der hydraulischen Blockierung möglichst einfach zu gestalten. The invention is based on the object of providing the means for achieving this to make the hydraulic blocking as simple as possible.

Erfindungsgemäß wird dies dadurch erreicht, daß die Überströmverbindung in dem Kolben vorgesehen und dem Kolben das Absperrorgan zugeordnet ist, das über einen innerhalb einer hohlen Kolbenstange vorgesehenen Stab verstellbar ist.According to the invention this is achieved in that the overflow connection provided in the piston and the piston is assigned the shut-off device, which has a hollow inside Piston rod provided rod is adjustable.

Um auch im hydraulisch blockierten Zustand bei relativ hohen Belastungen der Tischplatte oder des Stuhlsitzes eine Komprimierung des Gases in der Ausgleichskammer zu vermeiden, ist es zweckmäßig, den Durchmesser des Kolbens gegenüber dem Kolbenstangendurchmesser groß zu wählen.In order to achieve compression even in the hydraulically blocked state with relatively high loads on the table top or the chair seat To avoid the gas in the compensation chamber, it is useful to measure the diameter of the piston against the diameter of the piston rod great to choose.

Vorteilhafte, beispielsweise Ausführungsformen der Erfindung ergeben sich aus der Zeichnung und der folgenden Beschreibung.Advantageous, for example embodiments of the invention result from the drawing and the following description.

Es zeigen:Show it:

Fig. 1 ein Hebeaggregat im Schnitt,1 shows a lifting unit in section,

Fig. 2 eine abgewandelte Konstruktion, ebenfalls im Schnitt.Fig. 2 shows a modified construction, also in section.

Bei der in der Fig. 1 aufgezeigten Bauform besteht das hydropneumatische Hebeaggregat aus den Zylindern 1 und 2, von denen der Zylinder 1 einen größeren Durchmesser aufweist. Der Zylinder 1 umschließt die gasgefüllte Ausgleichskammer 3* Zwischen der Ausgleichskammer 3 und der Hydraulikkammer 4- befindet sich eine im Zylinder 1 gleitbar gelagerte, gegenüber der Zylinderwand abgedichtete Trennwand 5· Diese Trennwand überträgt den Gasdruck auf das Betriebsmedium, das z.B. aus Öl bestehen kann.In the design shown in FIG. 1, there is the hydropneumatic Lifting unit from cylinders 1 and 2, of which cylinder 1 has a larger diameter. The cylinder 1 encloses the gas-filled compensation chamber 3 * is located between the compensation chamber 3 and the hydraulic chamber 4- a partition 5, which is slidably mounted in the cylinder 1 and is sealed against the cylinder wall. This partition transmits the gas pressure on the operating medium, which can consist of oil, for example.

Zur anderen Seite hin ist die Ausgleichskammer durch eine Endscheibe 6 abgeschlossen. Diese ist mit einem Gewindezapfen 7 versehen, um das Hebeaggregat an dem Fußkreuz des höhenverstellbaren Tisches oder Stuhles festzulegen.On the other side is the compensation chamber through an end plate 6 completed. This is provided with a threaded pin 7 to attach the lifting unit to the base of the height-adjustable Table or chair.

009810/0837009810/0837

Der größere Zylinderdurchmesser der gasgefüllten Ausgleichskammer hat lediglich den Zweck, eine flache Federkennung zu erzielen. Beim Einschieben der Kolbenstange legt die Trennwand bei großem Trennwanddurchmesser einen kürzeren Weg zurück als bei einer Trennwand mit kleinem Durchmesser. Für die Federkennung ist des? Druckanstieg im Gasraum maßgebend, der durch Einschieben der Kolbenstange erfolgt.The purpose of the larger cylinder diameter of the gas-filled compensation chamber is merely to provide a flat spring characteristic achieve. When the piston rod is pushed in, the partition covers a shorter distance than if the partition wall diameter is large in the case of a partition with a small diameter. For the spring rate is it? Pressure rise in the gas space is decisive, which is caused by The piston rod is pushed in.

Der Zylinder 1 ist über einen Ring 8 mit dem Zylinder 2 verbunden. Der Zylinder 2 ist in dem Ausführungsbeispiel in den Ring 8 eingeschweißt.The cylinder 1 is connected to the cylinder 2 via a ring 8. The cylinder 2 is welded into the ring 8 in the exemplary embodiment.

Der in dem Zylinder 2 gleitbar angeordnete Kolben 9 weist Überströmkanal 10 auf und ist mit der Kolbenstange 11 fest verbunden. Die Kolbenstange 11 ist als Rohr ausgebildet, das einen Rundstab 12 umschließt. Der Rundstab 12 ist gegenüber dem Rohr 11 durch Dichtungen 13 abgedichtet. Er weist an seinem äußeren Ende einen Handhebel 14 auf. Das andere Ende des Rundstabes ist mit einem Außengewinde 15 versehen. Dieses Stabende ist in den Kolben 9 eingeschraubt.The piston 9 slidably disposed in the cylinder 2 has Overflow channel 10 and is firmly connected to the piston rod 11. The piston rod 11 is designed as a tube that a round rod 12 encloses. The round rod 12 is sealed off from the tube 11 by seals 13. He instructs its outer end has a hand lever 14. The other end the round rod is provided with an external thread 15. This The end of the rod is screwed into the piston 9.

Das Absperrorgan ist als Teller 16 gestaltet, der auf das Gewindeteil des Stabes 12 geschraubt und dort über einen Bolzen, eine Schraube od.dgl. festgelegt ist.The shut-off element is designed as a plate 16, which is screwed onto the threaded part of the rod 12 and there via a bolt, a screw or the like. is fixed.

Wird nun über den Handhebel 14 der Rundstab 12 gedreht, so bewegt sich der Teller 16 gegenüber dem Kolben 9t so daß die Überströmkanäle 10 frei gegeben oder verschlossen werden.If the round rod 12 is now rotated via the hand lever 14, the plate 16 moves relative to the piston 9 t so that the overflow channels 10 are released or closed.

Bei der Bauform nach der Fig. 2 ist der Handhebel 17 mit der Hohlkolbenstange 18 verbunden. Das Absperrorgan weist neben dem Teller 19 eine Gewindehülse 20 auf, die in den Kolben eingeschraubt ist. Das Absperrorgan ist weiterhin mit einer Vierkantaussparung versehen, die von dem Vierkantstab 21 durchtreten wird. Der Vierkantstäb, der frei in die hohle Kolbenstange 18 hineinragt, ist am anderen Ende in der Wand 22 festgelegt. DieIn the design according to FIG. 2, the hand lever 17 is with the Hollow piston rod 18 connected. In addition to the plate 19, the shut-off element has a threaded sleeve 20 which is screwed into the piston is. The shut-off device is still with a square recess provided, which is passed through by the square bar 21. The square rod that freely slides into the hollow piston rod 18 protrudes is fixed in the wall 22 at the other end. the

009810/0837009810/0837

~4~ ■ 155A257~ 4 ~ ■ 155A257

Wand 22 weist Durchtrittstiohrungen 23 für die Flüssigkeit auf. In dem Zylinder 1 ist ebenfalls, wie bei der Konstruktion nach Fig. 1, eine Trennwand gleitbar gelagert, die die gasgefüllte Ausgleichskammer zum Hydraulikraum hin abschließt.Wall 22 has through holes 23 for the liquid. In the cylinder 1, as in the construction of FIG. 1, a partition is slidably mounted, which the gas-filled Compensating chamber closes off towards the hydraulic chamber.

009810/0837009810/0837

Claims (6)

PatentansprücheClaims 1. Hydropneumatisches Hebeaggregat, insbesondere für höhenverstellbare Tische und Stühle, bestehend aus einer unter dem Druck eines Gases stehenden zylindrischen Ausgleichskammer und einem von ihr durch eine gleitbar gelagerte Trennwand getrennten, in zwei Hydraulikkammem unterteilten, mit dem Betriebsmedium gefüllten, einen Kolben mit einer Kolbenstange aufnehmenden Hydraulikraum, welche Kammern übereinander angrenzend angeordnet sind, wobei zwischen den beiden Hydraulikkammern als einzige Verbindung in an sich bekannter Weise ein Überströmkanal mit einem über eine Stange betätigbaren Absperrorgan vorgesehen ist, nach Patent (Patentanmeldung P 14 29 571.7), dadurch gekennzeichnet, daß die tiberströmverbindung zwischen den Hydraulikkammern im Kolben (9) vorgesehen und dem Kolben das Absperrorgan (16,19,20) zugeordnet ist, das über einen innerhalb einer hohlen Kolbenstange (11,18) vorgesehenen Stab (12,21) verstellbar ist.1. Hydropneumatic lifting unit, especially for height-adjustable ones Tables and chairs, consisting of a cylindrical compensation chamber under the pressure of a gas and one separated from it by a slidably mounted partition wall, divided into two hydraulic chambers, with the Operating medium filled, a piston with a piston rod receiving hydraulic space, which chambers are adjacent one above the other are arranged, the only connection between the two hydraulic chambers in a manner known per se an overflow channel is provided with a shut-off device that can be actuated via a rod, according to patent (patent application P 14 29 571.7), characterized in that the overflow connection between the hydraulic chambers in the piston (9) provided and the piston is assigned the shut-off device (16,19,20), which via a hollow piston rod (11,18) provided rod (12,21) is adjustable. 2. Hebeaggregat nach Anspruch 1, dadurch gekennzeichnet, daß der innerhalb der hohlen Kolbenstange (11) angeordnete Stab als Rundstab (12) ausgebildet ist, der am aus dem Hydraulikraum herausragenden Ende mit einem Handhebel (14) verbunden ist, welcher Stab am anderen Ende einen in den Kolben eingeschraubten Gewindeteil (15) aufweist.2. Lifting unit according to claim 1, characterized in that the rod arranged within the hollow piston rod (11) as Round rod (12) is formed, which is connected to a hand lever (14) at the end protruding from the hydraulic chamber, which rod has a threaded part (15) screwed into the piston at the other end. 3. Hebeaggregat nach Anspruch 2, dadurch gekennzeichnet, daß das Absperrorgan (16) als auf den Hundstab (12) geschraubter und dort festgelegter Teller ausgebildet ist.3. Lifting unit according to claim 2, characterized in that the Shut-off element (16) as screwed onto the dog rod (12) and there fixed plate is formed. Ne^ UnteriaQen (Art 7II AtML 2 Nr. 1 Satz 3(kw AnderuntiseM. v. 4.9.136- Ne ^ UnteriaQen (Art 7 II AtML 2 No. 1 Sentence 3 (kw AnderuntiseM. V. 4.9. 136- 00 9810/083700 9810/0837 4. Hebeaggregat nach Anspruch 1, dadurch gekennzeichnet, daß der in die hohle Kolbenstange (18) ragende Stab ein Vieleckstab (21) ist, der in einer mit üurchflußbohrungen ausgestatteten Wand (22) festgelegt ist, welcher Stab eine Vieleckaussparung des Absperrorgans (19,20) durchtritt.4. Lifting unit according to claim 1, characterized in that the rod protruding into the hollow piston rod (18) is a polygonal rod (21) is, which is set in a wall (22) equipped with üflowbohrungen, which rod is a polygonal recess of the shut-off element (19.20) passes through. 5. Hebeaggregat nach Anspruch 4, dadurch gekennzeichnet, daß das Absperrorgan (19) einen in den Kolben geschraubten Gewindestutzen (20) aufweist.5. Lifting unit according to claim 4, characterized in that the shut-off element (19) has a threaded connector screwed into the piston (20). 6. Hebeaggregat nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß der Durchmesser der die Ausgleichskammer begrenzenden Trennwand (5) größer ist als der Durchmesser des in dem Hydrauilik- raum gleitbar gelagerten Kolbens (9)·6. lifting unit according to claims 1 to 5, characterized in that the diameter of the compensating chamber-defining partition (5) is greater than the diameter of the piston slidably mounted in the space Hydrauilik- (9) · 009810/0837 C0PY 009810/0837 C0PY '. : - - - ORIGINAL INSPECTED'. : - - - ORIGINAL INSPECTED
DE19651554257 1964-11-14 1965-03-23 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs Pending DE1554257A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DEH54327A DE1301026B (en) 1964-11-14 1964-11-14 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
DEH0054677 1964-12-23
DEH0055001 1965-01-28
DEH0055540 1965-03-23
DEH0055561 1965-03-24

Publications (1)

Publication Number Publication Date
DE1554257A1 true DE1554257A1 (en) 1970-03-05

Family

ID=27512100

Family Applications (5)

Application Number Title Priority Date Filing Date
DEH54327A Pending DE1301026B (en) 1964-11-14 1964-11-14 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
DE19641429576 Pending DE1429576A1 (en) 1964-11-14 1964-12-23 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
DE19651554251 Pending DE1554251A1 (en) 1964-11-14 1965-01-28 Hydraulically controlled lifting unit
DE19651554257 Pending DE1554257A1 (en) 1964-11-14 1965-03-23 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
DE19651554258 Pending DE1554258A1 (en) 1964-11-14 1965-03-24 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs

Family Applications Before (3)

Application Number Title Priority Date Filing Date
DEH54327A Pending DE1301026B (en) 1964-11-14 1964-11-14 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
DE19641429576 Pending DE1429576A1 (en) 1964-11-14 1964-12-23 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs
DE19651554251 Pending DE1554251A1 (en) 1964-11-14 1965-01-28 Hydraulically controlled lifting unit

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE19651554258 Pending DE1554258A1 (en) 1964-11-14 1965-03-24 Hydropneumatic lifting unit, especially for height-adjustable tables and chairs

Country Status (9)

Country Link
US (1) US3415159A (en)
AT (1) AT277510B (en)
BE (1) BE672104A (en)
CH (1) CH433649A (en)
DE (5) DE1301026B (en)
FR (1) FR1453681A (en)
GB (1) GB1123030A (en)
NL (1) NL6514704A (en)
NO (1) NO136133C (en)

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Also Published As

Publication number Publication date
GB1123030A (en) 1968-08-07
BE672104A (en) 1966-03-01
DE1301026B (en) 1969-08-14
CH433649A (en) 1967-04-15
NO136133B (en) 1977-04-18
DE1429576A1 (en) 1970-01-29
NO136133C (en) 1977-07-27
FR1453681A (en) 1966-09-23
AT277510B (en) 1969-12-29
US3415159A (en) 1968-12-10
DE1554251A1 (en) 1970-03-05
DE1554258A1 (en) 1969-05-22
NL6514704A (en) 1966-05-16

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