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Class Information
Number: 91/418
Name: Motors: expansible chamber type > With motive fluid valve
Description: Apparatus including valve means to control the flow of motive fluid to or from the motor or while in the motor so as to provide a control of the motor.

Sub-classes under this class:

Class Number	Class Name	Patents
91/433	Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber	213
91/431	Continuous motive fluid flow through chamber in motor idle condition	38
91/420	Contracting chamber exhaust valve controlled by expanding chamber pressure or flow	283
91/435	Controlled by rate of movement of working member	34
91/429	Dither valve	28
91/459	Electrically operated (275) (361)	411
91/421	Expanding chamber inlet controlled by contracting chamber pressure or flow	72
91/462	For double-acting motor	45
91/440	For exhausting contracting working chamber to expanding opposed nonworking	26
91/437	Independent control of bypass between opposed working chambers	128
91/432	Inlet check valve with means for disconnectable supply line (468)	27
91/436	Inlet fluid supplemented by controlled fluid pressurized in opposed contracting chamber	153
91/428	Manual control carried on or operated from load or output element	16
91/461	Pilot valve (304)	424
91/453	Plural actuators for single valve means (367)	40
91/427	Plural manual control stations	15
91/449	Plural separately controlled waste passages for single working chamber	55
91/460	Pulsator actuator for valve (280)	45
91/454	Relatively movable inlet and exhaust valves for single working chamber	169
91/444	Relatively movable serial valves	69
91/419	Responsive to (1) motive fluid temperature or state, or (2) motor position or orientation	39
91/468	Self-acting valve (432) (446) (451) (452)	98
91/442	Self-opening exhaust valve held closed by inlet pressure (268)	50
91/458	Speed governor operated (366)	15
91/443	To provide unequal inlet and exhaust flow rates to single working chamber	126
91/424	Two hand control	39
91/469	Unitary inlet and exhaust valve for single working chamber	30
91/423	Valve part forms traversed movable portion of working chamber wall (276)	1
91/430	Valve parts continuously relatively moved for nonvalving function	2
91/422	Valved piston (222)	136
91/441	With ambient fluid inlet valve to expanding working chamber	34
91/426	With fluid pressure holding means for valve	44

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7617874	Flexible matrix composite actuator for use in subsurface wellbores	Nov. 17, 2009
7487706	Device for controlling a hydraulically driven motor	Feb. 10, 2009
7451790	Device for controlling hydraulic power units	Nov. 18, 2008
7448309	Hydraulic arrangement	Nov. 11, 2008
7415376	Valve tester control enhancements	Aug. 19, 2008
7213500	Pneumatic tool	May. 8, 2007
7134378	Continuously variable transmission	Nov. 14, 2006
7130721	Electrohydraulic control system	Oct. 31, 2006
6848353	Hydraulic device	Feb. 1, 2005
6742629	Valve control unit for a hydraulic elevator	Jun. 1, 2004
6371005	Hydraulic power unit for an elevator drive	Apr. 16, 2002
6354184	Power machine with valve mount for valve assembly	Mar. 12, 2002
6230607	Adjusting device for a pneumatic drive, particularly for a medical or dental instrument	May. 15, 2001
6116144	Pressure motor for electro-rheological fluids	Sep. 12, 2000
5562018	Hydraulic valve	Oct. 8, 1996
5452745	Magnetorheological valve and devices incorporating magnetorheological elements	Sep. 26, 1995
5317952	Tentacle-like manipulators with adjustable tension lines	Jun. 7, 1994
5315917	Monoport airgun for seismic exploration having discharge port extending continuously for 360 degree around its axis	May. 31, 1994
5191826	Hydraulic control device	Mar. 9, 1993
5181452	Bellows actuator	Jan. 26, 1993
5161450	Air motor with warm air introduction means to prevent freezing	Nov. 10, 1992
5125324	Portable hydraulically operated device incorporating automatic drain valve	Jun. 30, 1992
4955195	Fluid control circuit and method of operating pressure responsive equipment	Sep. 11, 1990
4930401	Valve system and arrangement for on-line valve replacement	Jun. 5, 1990
4750408	Advancing device	Jun. 14, 1988
4620474	Drive mechanism for transmitting force and motion along a path	Nov. 4, 1986
4509407	Hydraulic control valve with maintenance-facilitating feature	Apr. 9, 1985
4352271	Steam feeding apparatus for a multicylinder steam engine	Oct. 5, 1982
4348945	Device for controlling a hydraulic power circuit	Sep. 14, 1982
4261249	Hammer	Apr. 14, 1981
4232584	Control element for auxiliary power steerings	Nov. 11, 1980
4122867	Hydraulic valve with open center metering notches	Oct. 31, 1978
4098171	Pneumatic piston apparatus	Jul. 4, 1978
4086844	Hydraulic cylinder utilizing corrugated running surfaces	May. 2, 1978
4072086	Driving assembly	Feb. 7, 1978
4069889	Steering systems	Jan. 24, 1978
4012909	Hammer	Mar. 22, 1977
3962956	Hydropneumatic valve actuator	Jun. 15, 1976