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Class Information
Number: 417/419
Name: Pumps > Motor driven > Electric or magnetic motor > Reciprocating rigid pumping member > Relatively movable pumping members
Description: Apparatus in which the pump comprises a plurality of rigid pumping members which move or are capable of moving relative to one another incident to the operation of the pump.

Patents under this class:

Patent Number Title Of Patent Date Issued
8596992 Air supply mechanism for ventricular assist system Dec. 3, 2013
8449274 Magnetic reciprocating pump May. 28, 2013
8241015 Linear compressor Aug. 14, 2012
8192174 Refrigerant compressor having a connecting rod with a force application point at crank pin which is displaced in a direction of the bearing in relation to the axial center of the crank pin Jun. 5, 2012
8167588 Compressor system and frame May. 1, 2012
7942652 Bi-directional centripetally-powered reciprocating pump May. 17, 2011
7726951 Fuel control module Jun. 1, 2010
7654802 Reciprocating drive apparatus and method Feb. 2, 2010
6832900 Piston mounting and balancing system Dec. 21, 2004
6641377 Linear compressor with a plurality of support springs and a dual compression unit Nov. 4, 2003
6637625 Continuous positive displacement metering valve Oct. 28, 2003
6634870 Hermetic compressor having improved motor cooling Oct. 21, 2003
6616420 Reciprocating piston pump with auxiliary support shaft Sep. 9, 2003
6499972 Linear compressor Dec. 31, 2002
6354818 Oscillation-type compressor Mar. 12, 2002
5501581 Magnetic fluid pump and a method for transporting fluid using the same Mar. 26, 1996
5263978 Blood pump for pulsating operation Nov. 23, 1993
4844705 Suction line adaptor and filter for a hermetic compressor Jul. 4, 1989
4838769 High side scotch yoke compressor Jun. 13, 1989
4836755 Compressor with balanced flywheel Jun. 6, 1989
4753581 Constant suction pump for high performance liquid chromatography Jun. 28, 1988
4718832 Electromagnetic reciprocating pump Jan. 12, 1988
4671745 Magnetically-activated motorized pump Jun. 9, 1987
4648809 Device for conveyance of a pressure medium, especially oil Mar. 10, 1987
4615661 Magnetic pump Oct. 7, 1986
4597720 Cleaning apparatus for the wet cleaning of building walls and floors, swimming pools, automobiles and the like Jul. 1, 1986
4594056 Hydraulic pump unit Jun. 10, 1986
4544334 Mechanical means for holding air gaps on bolt-down stators in refrigerant compressors Oct. 1, 1985
4518326 Hermetic motor compressor for refrigeration systems and the like May. 21, 1985
4518317 Fluid pumping system May. 21, 1985
4470772 Direct suction radial compressor Sep. 11, 1984
4396361 Separation of lubricating oil from refrigerant gas in a reciprocating compressor Aug. 2, 1983
4365942 Liquid helium pump Dec. 28, 1982
4358254 Variable capacity compressor Nov. 9, 1982
4355960 Compressor refrigeration system utilizing thermally stable refrigeration lubricants containing alkyl polyhalophenyl ethers Oct. 26, 1982
4252506 Variable capacity compressor Feb. 24, 1981
4200426 Hermetic compressor assembly including torque reaction leaf spring means Apr. 29, 1980
4152956 Compressor for air-conditioning devices for vehicles May. 8, 1979
4127360 Bumpless pump apparatus adjustable to meet slave system needs Nov. 28, 1978
4089624 Controlled pumping system May. 16, 1978
4033707 Refrigeration compressor structures and their methods of construction Jul. 5, 1977

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