NZ334716A - Fluid actuator including a piston drivable in two directions - Google Patents

Fluid actuator including a piston drivable in two directions

Info

Publication number
NZ334716A
NZ334716A NZ334716A NZ33471697A NZ334716A NZ 334716 A NZ334716 A NZ 334716A NZ 334716 A NZ334716 A NZ 334716A NZ 33471697 A NZ33471697 A NZ 33471697A NZ 334716 A NZ334716 A NZ 334716A
Authority
NZ
New Zealand
Prior art keywords
piston
port
fluid
move
actuator
Prior art date
Application number
NZ334716A
Inventor
Trevor Leonard Bryant
Craig Mchardy Bryant
Original Assignee
Trearc Ltd
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
Priority claimed from GBGB9619648.0A external-priority patent/GB9619648D0/en
Priority claimed from GBGB9707098.1A external-priority patent/GB9707098D0/en
Application filed by Trearc Ltd filed Critical Trearc Ltd
Publication of NZ334716A publication Critical patent/NZ334716A/en

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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F15B11/15—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor with special provision for automatic return

Landscapes

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

Abstract

A fluid actuator comprises a main fluid ram 10 including a piston 12 coupled to a piston rod 18, and a control valve 30 which includes a body member 44 moveable from a first position (Fig.2) in which a port 34 is coupled to a port 42 and port 38 is coupled to port 34 allowing fluid to be passed to port 14 and taken from port 16 of ram 10. Valve 30 causes the piston to be driven in a first and a second direction A and B. Driver means 52 are activated directly or indirectly in response to movement of the piston in one direction to cause operation of the valve 30 to drive the piston in the other direction. When fluid is fed to port 16 (and taken from port 14) piston 12 is driven to move in the direction of arrow A. When fluid is fed to port 14 (and taken from port 16) piston 12 is driven to move in the direction of arrow B. The actuator further comprises a mechanical latch (not shown) operable when latched to prevent operation of the actuator and when released permits operation of the actuator. Driver means 52 comprises a valve having a body member 68 moveable between first and second positions under the influence of a cam 26 (carried by piston rod 18) as it moves in response to movement in one direction of the piston rod. Cam 26 is arranged to carry member 68 to a first position in which fluid is passed via a flow control valve 66 to one side of a timer piston 48 in a sense to drive the timer piston to move a control valve body member 44 to a position to cause the piston to move in the other direction.
NZ334716A 1996-09-20 1997-09-19 Fluid actuator including a piston drivable in two directions NZ334716A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9619648.0A GB9619648D0 (en) 1996-09-20 1996-09-20 Fluid actuators
GBGB9707098.1A GB9707098D0 (en) 1997-04-08 1997-04-08 Fluid actuators
PCT/GB1997/002550 WO1998012406A1 (en) 1996-09-20 1997-09-19 Fluid actuators

Publications (1)

Publication Number Publication Date
NZ334716A true NZ334716A (en) 2000-07-28

Family

ID=26310071

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ334716A NZ334716A (en) 1996-09-20 1997-09-19 Fluid actuator including a piston drivable in two directions

Country Status (4)

Country Link
EP (1) EP0932741A1 (en)
AU (1) AU718315B2 (en)
NZ (1) NZ334716A (en)
WO (1) WO1998012406A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011113361B4 (en) 2011-09-15 2015-02-26 Airbus Defence and Space GmbH Fluid valve arrangement with a bistable fluid valve

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3358563A (en) * 1965-07-09 1967-12-19 Scovill Manufacturing Co Air cylinder cycling apparatus
GB1511681A (en) * 1975-05-23 1978-05-24 British Lely Hydraulic ram mechanism
DE2912949A1 (en) * 1979-03-31 1980-10-16 Bosch Gmbh Robert DOOR OPERATING DEVICE
DE3225536A1 (en) * 1982-07-08 1984-01-12 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover PNEUMATIC DOOR ACTUATOR
FR2656385B1 (en) * 1989-12-22 1992-04-30 Matairco Hydro Air Sa

Also Published As

Publication number Publication date
AU4311297A (en) 1998-04-14
EP0932741A1 (en) 1999-08-04
AU718315B2 (en) 2000-04-13
WO1998012406A1 (en) 1998-03-26

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