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Class Information
Number: 180/441
Name: Motor vehicles > Steering gear > With fluid power assist > Device to control pressure (e.g., valve)
Description: Subject matter designed to vary the fluid pressure in a fluid power assisted steering system.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8678129 Method for selectively charging and discharging a steering accumulator Mar. 25, 2014
8668044 Transporter vehicle Mar. 11, 2014
8662241 Apparatus for use in turning steerable vehicle wheels Mar. 4, 2014
8651225 Control valve assembly for electro-hydraulic steering system Feb. 18, 2014
8636098 Hydraulic steering control valve and reverse self-locking steering system Jan. 28, 2014
8627917 Steering system of industrial machine and method of changing body-articulating angle Jan. 14, 2014
8606463 Hydraulic steering system comprising a first and a second steering member and vehicle comprising a hydraulic steering system Dec. 10, 2013
8584791 Hydraulic power steering apparatus Nov. 19, 2013
8561752 Power steering systems and methods Oct. 22, 2013
8561751 System for selectively charging and discharging a steering accumulator Oct. 22, 2013
8556022 Solenoid valve, solenoid and hydraulic power system Oct. 15, 2013
8560167 System and method for performing evaporative leak diagnostics in a vehicle Oct. 15, 2013
8534416 Hydraulic steering Sep. 17, 2013
8490742 Hydraulic power steering unit Jul. 23, 2013
8469139 Method of relieving power steering assist and a power steering system utilizing the method Jun. 25, 2013
8459400 Force steer axle assembly with redundant centering Jun. 11, 2013
8439151 Apparatus for use in turning steerable vehicle wheels May. 14, 2013
8408352 Energy efficient power steering pump control system Apr. 2, 2013
8403103 Apparatus for use in turning steerable vehicle wheels Mar. 26, 2013
8392077 Transmission control apparatus Mar. 5, 2013
8307852 Pinion valve body and pinion valve assembly for vehicle equipped with the same Nov. 13, 2012
8272472 Steering operation device Sep. 25, 2012
8272471 Isolation valve for a load-reaction steering system Sep. 25, 2012
8251098 Slide vane for hydraulic power steering Aug. 28, 2012
8167081 Dual mode hydrostatic steering system May. 1, 2012
8100221 Engine-off power steering system Jan. 24, 2012
8079439 Hydraulic steering Dec. 20, 2011
8056672 Steering control system combining electro-hydraulic and manually-actuated pilot pressure control valves for safe operation Nov. 15, 2011
7997379 Hydraulic steering Aug. 16, 2011
7984785 Control valve assembly for electro-hydraulic steering system Jul. 26, 2011
7980354 Hydraulic steering Jul. 19, 2011
7971679 Power steering system Jul. 5, 2011
7913801 Steering device for construction vehicle Mar. 29, 2011
7896026 Filter and pressure control valve of electronically controllable power steering apparatus including the same Mar. 1, 2011
7896403 Pipe/silencer device assembly Mar. 1, 2011
7891459 Multiple ratio steering for loader Feb. 22, 2011
7886771 Power steering system frequency suppressor Feb. 15, 2011
7845458 Control system for frame-steering of a vehicle and method for controlling two steering cylinders in a frame-steered vehicle Dec. 7, 2010
7837001 Dual hydrostatic vehicle steering system Nov. 23, 2010
7798280 Hydraulic steering system for a vehicle Sep. 21, 2010
7793752 Method of determining boost direction in a power steering system Sep. 14, 2010
7789190 Hydraulic steering Sep. 7, 2010
7735508 Rotary slide valve Jun. 15, 2010
7735597 Steering apparatus for vehicle Jun. 15, 2010
7726438 Hydraulic system Jun. 1, 2010
7712574 Vehicle steering systems May. 11, 2010
7699135 Integrated hydraulic control system Apr. 20, 2010
7648003 Power steering system Jan. 19, 2010
7641290 Shuttle valve for bi-rotational power units Jan. 5, 2010
7624837 Hydraulic power steering apparatus Dec. 1, 2009

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