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Class Information
Number: 251/337
Name: Valves and valve actuation > Biased valve > Springs and spring retainers
Description: Subject matter including valve springs and means for mounting the spring on the valve.










Patents under this class:
1 2 3 4 5 6 7 8 9

Patent Number Title Of Patent Date Issued
8667794 Valve seat and gasket for exhaust bypass valve Mar. 11, 2014
8646749 Electromagnetically actuatable valve Feb. 11, 2014
8636225 Fluid-regulating thermostat and method of manufacturing such a thermostat Jan. 28, 2014
8636263 System and method for locking retention of valve components Jan. 28, 2014
8616235 Valves Dec. 31, 2013
8596609 Solenoid valve Dec. 3, 2013
8590859 Solenoid valve and driver assistance device Nov. 26, 2013
8579253 Fuel injector valve Nov. 12, 2013
8579249 Biasing device for use with actuators of fluid valves Nov. 12, 2013
8544820 Biasing apparatus for use with actuators Oct. 1, 2013
8539983 By-pass valve for heat exchanger Sep. 24, 2013
8534314 Explosion protection valve Sep. 17, 2013
8517336 Solenoid valve for controlling a fluid Aug. 27, 2013
8511339 Fuel pressure controller Aug. 20, 2013
8499781 Flush control valve core assembly Aug. 6, 2013
8490720 Self aligning mud saver valve seat Jul. 23, 2013
8479764 Safety valve Jul. 9, 2013
8459505 Locking access plug for a bar gun Jun. 11, 2013
8448916 Solenoid valve for controlling a fluid May. 28, 2013
8434516 Three position solenoid valve May. 7, 2013
8424499 Pneumatic system for controlling the valves of an internal combustion engine Apr. 23, 2013
8403428 Check valve and brake hydraulic pressure control device using the same Mar. 26, 2013
8387836 Rod activated valve for saving water with tamper-resistant security feature Mar. 5, 2013
8387946 Electromagnetic valve Mar. 5, 2013
8375982 Hydraulic circuit and manifold with multifunction valve Feb. 19, 2013
8375984 Multiple preset indexing pressure relief valve Feb. 19, 2013
8347458 Bypass-type motor protecting device for a vacuum cleaner Jan. 8, 2013
8333073 Internal combustion engine with two-stage turbo charging system Dec. 18, 2012
8328158 Automotive high pressure pump solenoid valve with limp home calibration Dec. 11, 2012
8322359 Gas pressure regulator and method for assembling and disassembling the regulator Dec. 4, 2012
8322374 Channel switching valve Dec. 4, 2012
8317157 Automobile high pressure pump solenoid valve Nov. 27, 2012
8297586 Proportional control pneumatic cylinder Oct. 30, 2012
8281805 Automatic suction and pressure valve Oct. 9, 2012
8272524 Floating roof emergency draining system sealing valve Sep. 25, 2012
8240331 Negative pressure relief valve assembly Aug. 14, 2012
8205855 Electric control valve Jun. 26, 2012
8205858 Electromagnetic pressure valve Jun. 26, 2012
8166953 Fuel injection apparatus May. 1, 2012
8096319 Check valve Jan. 17, 2012
8083209 By-pass valve for heat exchanger Dec. 27, 2011
8047503 Conical spring bushing Nov. 1, 2011
8025039 Valve spring device and valve train of internal combustion engine using the same Sep. 27, 2011
8006951 Solenoid valve for hydraulic brake systems with pressure-assisted closing of the valve Aug. 30, 2011
7997557 Exhaust gas recirculation valve and method of producing exhaust gas recirculation valve Aug. 16, 2011
7997242 Spring retainer and spring system Aug. 16, 2011
7984728 Fuel pressure regulator valve assembly Jul. 26, 2011
7971853 Friction spring for leak detection poppet Jul. 5, 2011
7934694 Actuator with spring return piston May. 3, 2011
7896026 Filter and pressure control valve of electronically controllable power steering apparatus including the same Mar. 1, 2011

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