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Class Information
Number: 92/27
Name: Expansible chamber devices > With releasable stop or latch means to prevent movement of working member > Means includes element interfitting between working member and fixed part > Fluid actuated (28)
Description: Apparatus in which the intermeshing element is moved to or from intermeshing relationship with the working member responsive to the action of a pressure fluid.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8499555 Charge-cooled valve Aug. 6, 2013
8261655 Locking piston assembly Sep. 11, 2012
7930971 Rotary actuator with internal brake mechanism Apr. 26, 2011
7481161 Plunger-cylinder assembly Jan. 27, 2009
7370570 Fluid pressure cylinder May. 13, 2008
7097011 Park lock activated by fluid Aug. 29, 2006
6971351 Valve timing adjusting device Dec. 6, 2005
6945156 Device for switching and locking moving points components Sep. 20, 2005
6761103 Cylinder assembly Jul. 13, 2004
6598513 Cylinder apparatus Jul. 29, 2003
6202671 Control valve for cryogenic liquid propellant Mar. 20, 2001
6109165 Piston retention device for combustion-powered tools Aug. 29, 2000
5655878 Higher harmonic control apparatus for a helicopter rotor Aug. 12, 1997
5540138 Lockup and release device Jul. 30, 1996
5522303 Machine tool with locking mechanism Jun. 4, 1996
5490443 Pressure-discharged type retaining system Feb. 13, 1996
5406879 Actuator lock Apr. 18, 1995
5355707 Rolling mill and method for operating rolling mill Oct. 18, 1994
5293812 Braking apparatus for cylinder Mar. 15, 1994
5209064 Device for mutual immobilization of two elements mounted for relative rotation May. 11, 1993
5205203 Hydraulic cylinder-piston unit provided with a mechanical safety device, particularly for pantograph type motor vehicle lifts Apr. 27, 1993
5176227 Railway service and parking brake actuator Jan. 5, 1993
5140904 Piston sealing arrangement for pressure-fluid-operated systems Aug. 25, 1992
5097748 Hydraulic locking cylinder with throttled supply of fluid during unlocking stage Mar. 24, 1992
5095808 Sequential remote control plug release system Mar. 17, 1992
5090509 Interlock device, especially for a pressure-medium actuator of the axial-piston type Feb. 25, 1992
5063828 Actuator with a lock mechanism Nov. 12, 1991
5056418 Self-adjusting automatic locking piston for RAM blowout preventers Oct. 15, 1991
5052277 Hydraulic cylinder for braking elements of vehicles Oct. 1, 1991
5050484 Hydraulic actuator with locking mechanism Sep. 24, 1991
5025708 Actuator with automatic lock Jun. 25, 1991
4981069 Cylinder locking device Jan. 1, 1991
4969390 Rod locking device Nov. 13, 1990
4969388 Piston-cylinder device to be powered by a pressure fluid Nov. 13, 1990
4951552 Locking cylinder Aug. 28, 1990
4856411 Overload release system for an axially movable bolt Aug. 15, 1989
4854223 Pneumatic or hydraulic drive for opening and closing of doors Aug. 8, 1989
4854218 Piston and cylinder unit Aug. 8, 1989
4840055 Drawing apparatus in a press Jun. 20, 1989
4836091 Hydraulic work support Jun. 6, 1989
4809588 Hydraulic piston and cylinder assemblies Mar. 7, 1989
RE32885 Air brake with collet locked push rod and air supply system Mar. 7, 1989
4807855 Gas cylinder plunger lock Feb. 28, 1989
4791855 Cylinder locking device Dec. 20, 1988
4785716 Pneumatic cylinder and brake mechanism therefor Nov. 22, 1988
4784044 Pressure actuated axial locking Nov. 15, 1988
4784037 Locking apparatus for gate valves Nov. 15, 1988
4781102 Locking, bearing and actuating apparatus Nov. 1, 1988
4742758 Self-locking, fluid operated actuator May. 10, 1988
4733602 Hydraulic brake actuator with parking brake Mar. 29, 1988

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