GB2019496A - Improvements in or Relating to Hydraulic Apparatus - Google Patents

Improvements in or Relating to Hydraulic Apparatus

Info

Publication number
GB2019496A
GB2019496A GB7913413A GB7913413A GB2019496A GB 2019496 A GB2019496 A GB 2019496A GB 7913413 A GB7913413 A GB 7913413A GB 7913413 A GB7913413 A GB 7913413A GB 2019496 A GB2019496 A GB 2019496A
Authority
GB
United Kingdom
Prior art keywords
pressure
connectible
reservoir
return
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB7913413A
Other versions
GB2019496B (en
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.)
Bosch Rexroth AG
Original Assignee
GL Rexroth 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
Application filed by GL Rexroth GmbH filed Critical GL Rexroth GmbH
Publication of GB2019496A publication Critical patent/GB2019496A/en
Application granted granted Critical
Publication of GB2019496B publication Critical patent/GB2019496B/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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/01—Locking-valves or other detent i.e. load-holding devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The working chambers Z1a, Z1b, Z2a, Z2b of a pair of hydraulic motors Z1, Z2 are connectible to pressure source Q or reservoir T by respective control valves St1, St2. To permit the motors Z1, Z2 to withstand continuous static loads F the working lines A1, A2 are provided with non-return valves R1, R2 which are releasable when desired by means of pressure in control lines X1, X2. In order however to prevent unwanted opening of a non-return valve by pressure surges occurring in the common return line T1, T2 each non-return valve is provided with a control piston one side of which is connectible to reservoir or pressure source according to the position of the respective control valve, but the other side of which is permanently connected to the common return line. <IMAGE>
GB7913413A 1978-04-19 1979-04-18 Hydraulic apparatus Expired GB2019496B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782816976 DE2816976C3 (en) 1978-04-19 1978-04-19 Hydraulic system with several hydraulic motors

Publications (2)

Publication Number Publication Date
GB2019496A true GB2019496A (en) 1979-10-31
GB2019496B GB2019496B (en) 1982-04-07

Family

ID=6037404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913413A Expired GB2019496B (en) 1978-04-19 1979-04-18 Hydraulic apparatus

Country Status (2)

Country Link
DE (1) DE2816976C3 (en)
GB (1) GB2019496B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479358A1 (en) * 1980-03-25 1981-10-02 Richier Sa Nle Indle Mechanical digger lifting jack with safety device - monitors pressure after flexible pipeline section to control automatic non-return valve which can be selectively inhibited
WO1982002749A1 (en) * 1981-02-11 1982-08-19 Parker Raymond George Fluid control circuit
EP0463920A1 (en) * 1990-06-22 1992-01-02 Kabushiki Kaisha Kosmek Pressure oil supply/discharge circuit and valve device for use in said circuit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2946765C2 (en) * 1979-11-20 1986-04-30 Thyssen Industrie Ag, 4300 Essen Releasable check valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2479358A1 (en) * 1980-03-25 1981-10-02 Richier Sa Nle Indle Mechanical digger lifting jack with safety device - monitors pressure after flexible pipeline section to control automatic non-return valve which can be selectively inhibited
WO1982002749A1 (en) * 1981-02-11 1982-08-19 Parker Raymond George Fluid control circuit
EP0463920A1 (en) * 1990-06-22 1992-01-02 Kabushiki Kaisha Kosmek Pressure oil supply/discharge circuit and valve device for use in said circuit

Also Published As

Publication number Publication date
DE2816976B2 (en) 1980-07-03
DE2816976C3 (en) 1981-06-04
DE2816976A1 (en) 1979-12-06
GB2019496B (en) 1982-04-07

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee