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Class Information
Number: 417/218
Name: Pumps > Condition responsive control of drive transmission or pump displacement > Adjustable cam or linkage
Description: Apparatus in which the pump is of the expansible chamber-type, i.e., having a relatively movable pumping member and chamber, and including a mechanical movement having relatively movable parts in which the driving relationship is varied by an adjustable element (e.g., cam, eccentric, link, etc.,) which is moved relative to another part.










Sub-classes under this class:

Class Number Class Name Patents
417/222.1 Axial cam 360
417/221 Radial cam or eccentric 110
417/219 Radially adjustable stator 43


Patents under this class:
1 2 3 4 5

Patent Number Title Of Patent Date Issued
8690557 Variable displacement vane pump Apr. 8, 2014
8668466 Variable displacement reciprocating pump Mar. 11, 2014
8523536 Axial piston pump, and power transmission device with axial piston pump Sep. 3, 2013
8511216 Hydraulic actuator unit Aug. 20, 2013
8287251 Variable ratio hand pump Oct. 16, 2012
8277196 Adaptive accuracy for enteral feeding pump Oct. 2, 2012
8272847 Reciprocating compressor Sep. 25, 2012
8123492 Speed-related control mechanism for a pump and control method Feb. 28, 2012
7988432 Rotary compressor for changing compression capacity Aug. 2, 2011
7944075 Wind turbine based energy storage system and method using heavy weighted devices May. 17, 2011
7887308 Volumetric pump with reciprocated and rotated piston Feb. 15, 2011
7871252 Rotary compressor having two compression capacities Jan. 18, 2011
7854602 Rotary compressor for changing compression capacity Dec. 21, 2010
7811064 Variable displacement reciprocating pump Oct. 12, 2010
7677051 Compressor lubrication Mar. 16, 2010
7611334 Pump with variant strokes Nov. 3, 2009
7607902 Closed compressor and refrigerating cycle apparatus Oct. 27, 2009
7588427 Variable capacity rotary compressor Sep. 15, 2009
7563076 Variable rate pumping system Jul. 21, 2009
7549847 Portable bulk transfer pump with variable speed transmission Jun. 23, 2009
7484939 Variable displacement radial piston pump Feb. 3, 2009
7481631 Variable capacity rotary compressor Jan. 27, 2009
7354250 Variable capacity rotary compressor Apr. 8, 2008
7341434 Regulatory device comprising a threshold valve control valve Mar. 11, 2008
7309217 Variable capacity rotary compressor Dec. 18, 2007
7300259 Variable capacity rotary compressor Nov. 27, 2007
7293966 Variable capacity rotary compressor Nov. 13, 2007
7281914 Variable capacity rotary compressor Oct. 16, 2007
7226275 Variable capacity rotary compressor Jun. 5, 2007
7223081 Variable capacity rotary compressor May. 29, 2007
7220108 Variable capacity rotary compressor May. 22, 2007
7192259 Variable capacity rotary compressor Mar. 20, 2007
7153109 Variable capacity rotary compressor Dec. 26, 2006
7150608 Variable capacity rotary compressor Dec. 19, 2006
7150602 Variable capacity rotary compressor Dec. 19, 2006
7144224 Variable capacity rotary compressor Dec. 5, 2006
7140844 Variable capacity rotary compressor Nov. 28, 2006
7134845 Variable capacity rotary compressor Nov. 14, 2006
7104764 Variable capacity rotary compressor Sep. 12, 2006
7070395 Variable capacity rotary compressor Jul. 4, 2006
7059842 Variable capacity rotary compressor Jun. 13, 2006
7033149 Medium pump adapted for ease of disassembly and assembly Apr. 25, 2006
7014427 Capacity controller of capacity variable compressor Mar. 21, 2006
6962486 Variable capacity rotary compressor Nov. 8, 2005
6935853 Variable capacity rotary compressor Aug. 30, 2005
6863505 Wind driven high pressure water pump Mar. 8, 2005
6860724 Rotary compressor Mar. 1, 2005
6796773 Variable capacity rotary compressor Sep. 28, 2004
6732716 Metering valve arrangement May. 11, 2004
6715995 Hybrid compressor control method Apr. 6, 2004

1 2 3 4 5










 
 
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