GB1509368A - Control arrangements for an adjustment device actuated electrohydraulically - Google Patents

Control arrangements for an adjustment device actuated electrohydraulically

Info

Publication number
GB1509368A
GB1509368A GB3784876A GB3784876A GB1509368A GB 1509368 A GB1509368 A GB 1509368A GB 3784876 A GB3784876 A GB 3784876A GB 3784876 A GB3784876 A GB 3784876A GB 1509368 A GB1509368 A GB 1509368A
Authority
GB
United Kingdom
Prior art keywords
valve
chamber
pump
control
sept
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
GB3784876A
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.)
Siemens Building Technologies AG
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
LGZ Landis and Gyr Zug AG
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 Landis and Gyr AG, LGZ Landis and Gyr Zug AG filed Critical Landis and Gyr AG
Publication of GB1509368A publication Critical patent/GB1509368A/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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/18—Combined units comprising both motor and pump

Landscapes

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

Abstract

1509368 Valves LGZ LANDIS & GYR ZUG AG 13 Sept 1976 [19 Sept 1975] 37848/76 Heading F2V A valve 4 is operated by an A.C. driven pump 15 delivering to a working chamber 26 above a piston 27 which acts on a valve plate 5 via rods 11, 8; there being a control valve system 25 and a non-return valve 42 between first and working chambers 23, 26. As shown the pump piston is located by springs 19 and is oscillated by A.C. supply to a coil 20 to draw oil from a chamber 3 via bores 16 and deliver to chamber 26 via non return valve 42, valve (32) Fig. 2 (not shown) being closed by pressure acting on a control member (34). When the pump stops valve (32) will according to the free length of a spring (36) either (a) hold the pressure in the chamber 26 or (b) allow oil to flow back via passage (40). By application of a D.C. control of appropriate polarity to the pump coil 20, the valve (32) may be either (a) opened to allow oil to flow back or (b) held closed. An alternative control valve 54 may be used to give a pre-set leak back from the chamber 26.
GB3784876A 1975-09-19 1976-09-13 Control arrangements for an adjustment device actuated electrohydraulically Expired GB1509368A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1220675A CH591651A5 (en) 1975-09-19 1975-09-19

Publications (1)

Publication Number Publication Date
GB1509368A true GB1509368A (en) 1978-05-04

Family

ID=4380880

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3784876A Expired GB1509368A (en) 1975-09-19 1976-09-13 Control arrangements for an adjustment device actuated electrohydraulically

Country Status (4)

Country Link
CH (1) CH591651A5 (en)
DE (1) DE2547074A1 (en)
FR (1) FR2324914A1 (en)
GB (1) GB1509368A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH640610A5 (en) * 1979-10-02 1984-01-13 Elektrowatt Ag ACTUATOR.
DE3510546A1 (en) * 1985-04-04 1986-10-02 Elektrowatt AG, Zürich ELECTROHYDRAULIC ACTUATOR FOR CONTINUOUS CONTROL
DE102007023412A1 (en) * 2007-05-18 2008-11-20 Rehau Ag + Co. Hydraulic drive unit for shifting two vehicle body elements together, has reservoir for hydraulic fluid extracted by hydraulic pump, where reservoir is accommodated within housing
DE102008035523A1 (en) * 2008-07-30 2010-02-04 Wittenstein Ag Modular spindle unit for forming multi-spindle machining head at transverse drive of machine tool i.e. drill, has drive motor supported and axially shifted in module housing by driving of axial actuating device together with drive spindle
DE102013212493B3 (en) * 2013-06-27 2014-09-25 Schaeffler Technologies Gmbh & Co. Kg Switchable locking device, which includes an actuator and a rotary valve
ES2661120T3 (en) * 2015-04-14 2018-03-27 Siemens Aktiengesellschaft Valve actuators and valve arrangements

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH288540A (en) * 1948-12-23 1953-01-31 Elmeg Device with an electromagnetically driven pump.
FR1327841A (en) * 1962-04-10 1963-05-24 Low inertia hydraulic pump for regulator, servo and the like
GB1222953A (en) * 1967-04-05 1971-02-17 Nu Way Heating Plants Ltd Fluid fuel burner control systems
DE2101457A1 (en) * 1971-01-14 1972-08-03 Bbc Brown Boveri & Cie Electrically driven adjustment device with hydraulic power amplification
CH549896A (en) * 1972-09-22 1974-05-31 Landis & Gyr Ag ROCKER - PISTON PUMP.

Also Published As

Publication number Publication date
DE2547074A1 (en) 1977-03-31
FR2324914A1 (en) 1977-04-15
CH591651A5 (en) 1977-09-30

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Legal Events

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