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Class Information
Number: 417/26
Name: Pumps > Condition responsive control of pump drive motor > With condition responsive control of pump fluid valve
Description: Subject matter including valve means for varying the flow of fluid being pumped, which valve means is operated by sensing the occurrence of a condition or change of condition in the fluid being pumped.










Sub-classes under this class:

Class Number Class Name Patents
417/28 Fluid and motor controls have common sensing element 72
417/29 Fluid and motor controls separately responsive to diverse conditions 19
417/27 Having independent means for delaying valve actuation 26


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8678026 Automatic increased-suction relief apparatus Mar. 25, 2014
8668464 Method for transporting a fluid and device for producing a volume flow Mar. 11, 2014
8622716 Oil-cooled air compressor Jan. 7, 2014
8602743 Method of operating a safety vacuum release system Dec. 10, 2013
8485789 Capacity modulated scroll compressor system and method Jul. 16, 2013
8483898 Method and apparatus for controlling speed of an electric pump in a vehicle Jul. 9, 2013
8454319 Pressurized-oil supply amount control device for vehicle-mounted crane Jun. 4, 2013
8393352 Control system and method for water supply Mar. 12, 2013
8313306 Method of operating a safety vacuum release system Nov. 20, 2012
8267666 Air flow control apparatus Sep. 18, 2012
8235674 Paint circulation pump control system Aug. 7, 2012
8202057 Oil-free scroll compressor Jun. 19, 2012
8162619 Method for controlling the discharge pressure of an engine-driven pump Apr. 24, 2012
8157535 Electrical air pump assembly and inflatable product having the same Apr. 17, 2012
8152482 Displacement control valve for variable displacement compressor Apr. 10, 2012
8092191 Control system for reciprocating device Jan. 10, 2012
8007263 Water-lubricated compressor Aug. 30, 2011
7992490 Automatic by-pass control system for meat injection machine and method of using same Aug. 9, 2011
7922457 System and method for controlling a variable speed compressor during stopping Apr. 12, 2011
7890216 Control valve and positioner diagnostics Feb. 15, 2011
7828527 Paint circulating system and method Nov. 9, 2010
7686588 Liquid chemical supply system having a plurality of pressure detectors Mar. 30, 2010
7628590 Method and apparatus for reducing free flow risk Dec. 8, 2009
7611332 Device and method for controlling a thick matter pump Nov. 3, 2009
7539560 Control valve and positioner diagnostics May. 26, 2009
7438534 Wide range pressure control using turbo pump Oct. 21, 2008
RE40399 Low charge protection vent Jun. 24, 2008
7331773 Pump provided with exhaust valve device and hemodynamometer incorporating the same Feb. 19, 2008
7237581 Apparatus and method of dispensing photosensitive solution in semiconductor device fabrication equipment Jul. 3, 2007
7104763 Method for discriminating between operating conditions in medical pump Sep. 12, 2006
7052243 Pressure regulating valve May. 30, 2006
7029238 Pump controller for precision pumping apparatus Apr. 18, 2006
6964558 Compressor utilizing low volt power tapped from high volt power Nov. 15, 2005
6695589 Control for an electric motor driven pump Feb. 24, 2004
6641368 Compressor utilizing low volt power tapped from high volt power Nov. 4, 2003
6604908 Methods and systems for pulsed delivery of fluids from a pump Aug. 12, 2003
6599093 Compressor having speed and intake regulation valve control Jul. 29, 2003
6558126 Compressor utilizing low volt power tapped from high volt power May. 6, 2003
6537033 Open loop control apparatus for vacuum controlled systems Mar. 25, 2003
6530751 Device for controlling air filling and exhausting of an air cushion Mar. 11, 2003
6530750 Control for progressive cavity pump Mar. 11, 2003
6507792 Method of selecting devices for use in fluid pipeline network Jan. 14, 2003
6474951 Controller for pump and valve Nov. 5, 2002
6471487 Fluid delivery system Oct. 29, 2002
6461112 Screw compression apparatus and operation control method thereof Oct. 8, 2002
6406268 Control of a compressor unit Jun. 18, 2002
6375847 Method for operating a cross-flow filtration installation Apr. 23, 2002
6341943 Blower Jan. 29, 2002
6250887 Reversible pump-turbine system Jun. 26, 2001
6241463 Method for determining the operating level of a fan and fan Jun. 5, 2001

1 2 3










 
 
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