DE3465210D1 - Three-position actuating cylinder - Google Patents

Three-position actuating cylinder

Info

Publication number
DE3465210D1
DE3465210D1 DE8484111140T DE3465210T DE3465210D1 DE 3465210 D1 DE3465210 D1 DE 3465210D1 DE 8484111140 T DE8484111140 T DE 8484111140T DE 3465210 T DE3465210 T DE 3465210T DE 3465210 D1 DE3465210 D1 DE 3465210D1
Authority
DE
Germany
Prior art keywords
pressure
space
piston
medium chamber
pistons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8484111140T
Other languages
German (de)
Inventor
K-H Brinkmann
Alfred Klatt
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.)
ZF CV Systems Hannover GmbH
Original Assignee
Wabco Westinghouse Fahrzeugbremsen GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6212210&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3465210(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wabco Westinghouse Fahrzeugbremsen GmbH filed Critical Wabco Westinghouse Fahrzeugbremsen GmbH
Priority to DE8484111140T priority Critical patent/DE3465210D1/en
Application granted granted Critical
Publication of DE3465210D1 publication Critical patent/DE3465210D1/en
Expired 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/006—Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
    • F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
    • F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Actuator (AREA)
  • Fluid-Driven Valves (AREA)
  • Vehicle Body Suspensions (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

1. Three-position working cylinder having the following features : a) a first piston (16) equipped with a sealing ring (13) is provided, by means of which the cylinder (4) is divided into a first pressure-medium chamber (3) and a second pressure-medium chamber (17) which is arranged on the other side of the piston (16) relative to the first pressure-medium chamber (3) ; b) there is provided a second piston (8), in the form of an annular piston, which is sealed with respect to the inner wall of the cylinder and with respect to an outer surface of the first piston (16) ; c) there is provided a stop (47) which is fixed to the housing and limits the traval of the second piston (8) ; d) on at least one of the two pistons (16, 8) there is provided a stop (12) which limits the sliding movement of the two pistons (16, 8) towards one another ; e) a space (41) located between the two pistons (16, 8), which are guided in sealed manner, can be connected to the atmosphere via a recess (45) arranged in the cylinder housing (4) ; f) the first pressure-medium chamber (3) and the second pressure-medium chamber (17) can each be charged with air and vented by means of a valve arrangement (28, 30, 23, 24) ; characterised by the following features : g) the venting outlets of the valve arrangement (28, 30, 23, 24) are connected to the space (41) bounded by the two pistons (16, 8) ; h) there is provided a third valve arrangement (42, 43) serving as a discharge value, via which the space (41) can be connected to the atmosphere when a pressure exceeding atmospheric pressure builds up in the space (41), and which moves into the closed position when the pressure in the space (41) has fallen to such an extent that the closing force of the valve arrangement (42, 43) exceeds the force of the pressure in the space (41).
DE8484111140T 1983-10-19 1984-09-19 Three-position actuating cylinder Expired DE3465210D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484111140T DE3465210D1 (en) 1983-10-19 1984-09-19 Three-position actuating cylinder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833337969 DE3337969A1 (en) 1983-10-19 1983-10-19 WORK CYLINDER WITH THREE POSITIONS
DE8484111140T DE3465210D1 (en) 1983-10-19 1984-09-19 Three-position actuating cylinder

Publications (1)

Publication Number Publication Date
DE3465210D1 true DE3465210D1 (en) 1987-09-10

Family

ID=6212210

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19833337969 Granted DE3337969A1 (en) 1983-10-08 1983-10-19 WORK CYLINDER WITH THREE POSITIONS
DE8484111140T Expired DE3465210D1 (en) 1983-10-19 1984-09-19 Three-position actuating cylinder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19833337969 Granted DE3337969A1 (en) 1983-10-08 1983-10-19 WORK CYLINDER WITH THREE POSITIONS

Country Status (3)

Country Link
EP (1) EP0143238B1 (en)
AT (1) ATE28763T1 (en)
DE (2) DE3337969A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9622893D0 (en) * 1996-11-02 1997-01-08 Lucas Ind Plc Piston actuator
AT407661B (en) * 1998-08-04 2001-05-25 Hygrama Ag PRESSURE CYLINDER, SWITCH VALVE AND PRESSURE-OPERATED WORKING UNIT
DE102009029038A1 (en) * 2009-08-31 2011-03-03 Zf Friedrichshafen Ag Method for synchronization, servomotor and switching device with servomotor
DE102016202032A1 (en) * 2016-02-11 2017-08-17 Voith Patent Gmbh Switching device for a transmission

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR830896A (en) * 1937-01-14 1938-08-11 Bolinder Munktell Hydraulic control device for engine reversing devices, and in particular for boat engines
US2604878A (en) * 1948-01-03 1952-07-29 Westinghouse Air Brake Co Fluid pressure motor
DE1576175B1 (en) * 1966-11-15 1971-12-23 Barkas Werke Veb Pressurized working cylinder with double-sided loading, especially for switching gearboxes for motor vehicles
SE414527B (en) * 1978-11-07 1980-08-04 Volvo Ab CYLINDER WITH TWICE STEP, SPECIFICALLY A SWEAT CYLINDER
GB2042079B (en) * 1979-02-03 1983-01-12 Ford A T Stroke variation relay device
DE8105898U1 (en) * 1981-03-02 1982-04-08 Leibfried Maschinenbau Gmbh, 7033 Herrenberg Piston-cylinder unit
HU187363B (en) * 1981-04-16 1985-12-28 Autoipari Kutato Intezet Pneumatic working cylinder woth four piston particularly for stage selector mechanism of motor vehicle
HU187364B (en) * 1981-04-16 1985-12-28 Autoipari Kutato Intezet Pneumatic three-position working cylinder particularly for stageslector mechanism of motor vehicle

Also Published As

Publication number Publication date
DE3337969A1 (en) 1985-05-02
EP0143238A1 (en) 1985-06-05
DE3337969C2 (en) 1992-07-16
ATE28763T1 (en) 1987-08-15
EP0143238B1 (en) 1987-08-05

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8365 Fully valid after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: WABCO VERMOEGENSVERWALTUNGS-GMBH, 30453 HANNOVER,

8327 Change in the person/name/address of the patent owner

Owner name: WABCO GMBH, 30453 HANNOVER, DE

8327 Change in the person/name/address of the patent owner

Owner name: WABCO GMBH & CO. OHG, 30453 HANNOVER, DE