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Class Information
Number: 180/417
Name: Motor vehicles > Steering gear > With fluid power assist
Description: Subject matter in which there is provided motive means movable by the application of a pressurized fluid thereto to provide substantially all of the force required for guiding the vehicle, the initiating and/or remaining force being provided by a vehicle operator in guiding the vehicle.










Sub-classes under this class:

Class Number Class Name Patents
180/418 Between articulated wheeled vehicle sections 89
180/441 Device to control pressure (e.g., valve) 282
180/430 Having flexible working member 9
180/429 Having rotary working member 58
180/442 Hydraulic circuit 158
180/425 Including flexible power transmitting means 9
180/438 Movable working member engages wheel steering arm 9
180/439 Movable working member is a moving cylinder 34
180/426 Steering column supported 33
180/431 Steering linkage includes interengaging gear means 12
180/421 With condition modulated steering 248
180/440 With linkage intermediate working member and wheel steering arm 23
180/432 With plural working members 31
180/428 With rack and pinion gearing intermediate steering shaft and power assist 230
180/424 With swinging axle 18
180/434 Working member movement traverses vehicle path 28


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8666582 Apparatus for improving steering sensitivity of vehicle 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
8620527 Systems and methods for steering and calibration of vehicle steering controls for riding mowers and other vehicles Dec. 31, 2013
8596407 Integral power steering apparatus Dec. 3, 2013
8584791 Hydraulic power steering apparatus Nov. 19, 2013
8554410 Route guidance assistance by moment support at the steering wheel Oct. 8, 2013
8522914 Pump apparatus and control method for controlling the pump apparatus Sep. 3, 2013
8469139 Method of relieving power steering assist and a power steering system utilizing the method Jun. 25, 2013
8439151 Apparatus for use in turning steerable vehicle wheels May. 14, 2013
8408352 Energy efficient power steering pump control system Apr. 2, 2013
8376080 Pump apparatus, power steering apparatus and assembly method of housing Feb. 19, 2013
8326491 Method and device for determining an absolute value of a variable Dec. 4, 2012
8272471 Isolation valve for a load-reaction steering system Sep. 25, 2012
8272472 Steering operation device Sep. 25, 2012
8201656 Vehicle steering system Jun. 19, 2012
8204647 Electric power steering system Jun. 19, 2012
8100220 Vehicle having auxiliary steering system Jan. 24, 2012
8079439 Hydraulic steering Dec. 20, 2011
8074763 Power assist steering system Dec. 13, 2011
8028789 Control adaptation of variable gear ratio steering Oct. 4, 2011
8020660 Pump device Sep. 20, 2011
8013696 Magnetic apparatus and method of manufacturing the magnetic apparatus Sep. 6, 2011
7997378 Hydraulic steering Aug. 16, 2011
7984785 Control valve assembly for electro-hydraulic steering system Jul. 26, 2011
7980354 Hydraulic steering Jul. 19, 2011
7942231 Hydraulic power steering system May. 17, 2011
7942230 Hydraulic power steering system May. 17, 2011
7931112 Isolation valve for a load-reaction steering system Apr. 26, 2011
7918295 Fluid reservoir Apr. 5, 2011
7905316 Clutch device of oil pump in power steering system Mar. 15, 2011
7857092 Internal gear pump and power steering device Dec. 28, 2010
7845458 Control system for frame-steering of a vehicle and method for controlling two steering cylinders in a frame-steered vehicle Dec. 7, 2010
7832523 Power assist steering system Nov. 16, 2010
7798281 Method and apparatus for enhancing vehicle performance Sep. 21, 2010
7798282 Power assisted steering system Sep. 21, 2010
7798280 Hydraulic steering system for a vehicle Sep. 21, 2010
7770687 Hydraulic steering Aug. 10, 2010
7735596 Power steering apparatus Jun. 15, 2010
7730993 Power steering device Jun. 8, 2010
7699135 Integrated hydraulic control system Apr. 20, 2010
7694775 Power steering gear cooling Apr. 13, 2010
7685928 Steering mechanism Mar. 30, 2010
7654542 All terrain vehicle Feb. 2, 2010
7624837 Hydraulic power steering apparatus Dec. 1, 2009
7610988 Hydraulic steering Nov. 3, 2009
7596441 Power steering device Sep. 29, 2009
7591330 Fluid reservoir Sep. 22, 2009
7571040 Method and apparatus for controlling a magneto-rheological power steering coupling Aug. 4, 2009

1 2 3 4 5 6










 
 
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