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Class Information
Number: 91/313
Name: Motors: expansible chamber type > Cyclically operable > Working member controlled motive fluid for distributor motor > Pilot valve controlled distributor motor (461) > Pilot valve actuator extends into working chamber
Description: Apparatus in which means transmitting cyclic motion from the output motor working member to the pilot valve includes an element which moves relative to the working member and extends into the working chamber.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8382445 Air logic controller Feb. 26, 2013
8167586 Valve assembly with low resistance pilot shifting May. 1, 2012
8087345 Positive displacement injection pump Jan. 3, 2012
8079831 Submersible pump having a two-step control hydraulic valve Dec. 20, 2011
6951163 Shaft coupling and shifting mechanism for pneumatic pump Oct. 4, 2005
6769884 Hydraulic drive system for piston pumps Aug. 3, 2004
6386841 Pneumatically operated hydraulic pump May. 14, 2002
6123008 Compressed-air piston engine Sep. 26, 2000
5778753 Pneumatic or hydraulic cylinders Jul. 14, 1998
5584666 Reduced icing air valve Dec. 17, 1996
5527160 Mechanical shift, pneumatic assist pilot valve Jun. 18, 1996
5468127 Pilot control valve having means for recovering exhaust fluids Nov. 21, 1995
5377719 Pneumatic valve, particularly for control of compressed-air-operated membrane pumps Jan. 3, 1995
5368452 Double diaphragm pump having two-stage air valve actuator Nov. 29, 1994
5207726 Hydraulic pump May. 4, 1993
5173036 Method and an arrangement for controlling a linear motor Dec. 22, 1992
5105720 Oscillating piston controlled by piloted valve, piston position controls pilot valve Apr. 21, 1992
5050482 Apparatus for driving piston by fluid pressure Sep. 24, 1991
4949623 Hydraulic drive mechanism Aug. 21, 1990
4871302 Apparatus for removing fluid from the ground and method for same Oct. 3, 1989
4854832 Mechanical shift, pneumatic assist pilot valve for diaphragm pump Aug. 8, 1989
4846045 Expansible chamber motor Jul. 11, 1989
4812109 Apparatus for driving piston by fluid pressure Mar. 14, 1989
4776773 Pilot control valve for controlling the pumping rate of an injection pump Oct. 11, 1988
4659344 Liquid motor and pump with a stroke regulating gas motor Apr. 21, 1987
4648810 Control apparatus for a positive displacement reciprocating pump Mar. 10, 1987
4593712 Pilot control valve Jun. 10, 1986
4555222 Air-operated diaphragm pump and a valve arrangement therefor Nov. 26, 1985
4536137 Submergible pumping apparatus Aug. 20, 1985
4496294 Diaphragm pump Jan. 29, 1985
4494574 Valve arrangement for an air-operated diaphragm pump Jan. 22, 1985
4459718 Fluid pressure operated reciprocating mechanism Jul. 17, 1984
4452573 Variable pilot chemical pump Jun. 5, 1984
4431433 Single stage liquid motor and pump Feb. 14, 1984
4406595 Free piston pump Sep. 27, 1983
4406596 Compressed air driven double diaphragm pump Sep. 27, 1983
4405291 Downhole double acting pump Sep. 20, 1983
4386888 Double diaphragm operated reversing valve pump Jun. 7, 1983
4373425 Hydraulic engine Feb. 15, 1983
4348161 Pressure converting apparatus Sep. 7, 1982
4334837 Diaphragm air pump assembly Jun. 15, 1982
4329123 Diaphragm air pump assembly May. 11, 1982
4296672 Reciprocating piston-cylinder combination and valving control therefor Oct. 27, 1981
4295801 Fluid-powered submersible sampling pump Oct. 20, 1981
4264107 Demolition tool for breaking solid materials Apr. 28, 1981
4248136 Thrust device using hydraulic jacks Feb. 3, 1981
4240328 Valve mechanism for a hydraulic expansible chamber motor Dec. 23, 1980
4224013 Automobile vacuum system for inflating tires Sep. 23, 1980
4176676 Means for converting a water drive center pivot irrigation system to air drive Dec. 4, 1979
4118154 Hydraulically actuated pump assembly Oct. 3, 1978

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