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Class Information
Number: 303/22.1
Name: Fluid-pressure and analogous brake systems > Load control
Description: Subject matter wherein int distribution of fluid to the brake motors of a machine, e.g., a vehicle, is regulated by means which responds to the weight of a gravity loading on the machine.










Sub-classes under this class:

Class Number Class Name Patents
303/22.8 Detail 71
303/22.2 Empty and load type 50
303/22.4 Failure responsive 24
303/22.6 Railway vehicle 52
303/22.5 Responsive to fluid pressure spring 48


Patents under this class:
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Patent Number Title Of Patent Date Issued
8504268 Method and arrangement for applying a parking brake of a vehicle depending on the roadway conditions Aug. 6, 2013
8000870 Active brake pulsation control Aug. 16, 2011
7835845 Method and system for consistent braking control Nov. 16, 2010
7182411 Pneumatic-based communications system Feb. 27, 2007
7137672 Diagonal parking brake activation for vehicles with plural axles Nov. 21, 2006
7111912 Control handle with spiral position sensor and integral switches Sep. 26, 2006
6863354 Hydraulic brake pressure control device of load responsive type Mar. 8, 2005
6820944 Digital multi-point electronic load weigh system Nov. 23, 2004
6666528 Empty load device Dec. 23, 2003
6561595 Brake assembly, system and method May. 13, 2003
6447075 Vehicle braking system using stored vehicle parameters for electronic control of braking Sep. 10, 2002
6302496 Load-dependent brake-power regulator Oct. 16, 2001
6273522 Trailer brake control Aug. 14, 2001
6273524 Braking force control valve and air brake system with the same Aug. 14, 2001
6015193 Braking and steering system for a vehicle Jan. 18, 2000
5992945 Hydraulic brake force regulating system Nov. 30, 1999
5961187 Load response type brake fluid pressure controller Oct. 5, 1999
5951117 Boosted braking system with automatically-controlled reaction Sep. 14, 1999
5823638 Microprocessor controlled electro-pneumatic brake system in a multi-platform railroad freight car Oct. 20, 1998
5769510 Process for controlling wheel longitudinal force in vehicle Jun. 23, 1998
5632530 Electronic braking system with system test May. 27, 1997
5615931 Method and apparatus for regulating the brake system of a vehicle Apr. 1, 1997
5595425 Brake pressure control unit of vehicle load responsive type Jan. 21, 1997
5588716 Method and device for electronically controlling the brake system of a vehicle Dec. 31, 1996
5518305 Vacuum brake power booster May. 21, 1996
5505532 Skid control system Apr. 9, 1996
5482359 System and method for determining relative vehicle mass Jan. 9, 1996
5475596 Full car semi-active suspension control based on quarter car control Dec. 12, 1995
5472264 Brake unit for automotive vehicles with electric drive Dec. 5, 1995
5409301 Method of determining an optimized value of brake pressure ratio between a tractor and a trailer or semitrailer Apr. 25, 1995
5403072 Brake pressure control device for optimizing the brake-lining wear of motor vehicle brakes Apr. 4, 1995
5390991 Anti-skid control system Feb. 21, 1995
5382085 Electrohydraulic or electropneumatic braking control device for axles of trailers with mechanical brakes, and safety valve Jan. 17, 1995
5303986 Electropneumatic brake control with retarder apportioning Apr. 19, 1994
5286094 Controlling braking forces in tractor-trailer combinations Feb. 15, 1994
5275265 Brake-booster with modulated reaction Jan. 4, 1994
5259666 Double brake booster Nov. 9, 1993
5257856 Method of and system for controlling brakes Nov. 2, 1993
5240312 Process and system for anti-lock control Aug. 31, 1993
5236251 Vehicle braking systems Aug. 17, 1993
5195808 Method and system for non-locking and non-skidding braking/traction of a vehicle wheel Mar. 23, 1993
5154492 Load sensing proportioning valve Oct. 13, 1992
5141086 Controller for rear brakes Aug. 25, 1992
5029947 Braking systems for articulated vehicles Jul. 9, 1991
5002343 Trailer brake control for towing vehicles having electronic brake control Mar. 26, 1991
4984852 Trailer mounted tractor-trailer brake control system Jan. 15, 1991
4941510 Relay valve for pneumatic or hydraulic application Jul. 17, 1990
4926907 Relay valve for pneumatic or hydraulic application May. 22, 1990
4925251 Brake corrector subject to the load of a vehicle as a function of the seating of the latter May. 15, 1990
4863221 Tandem drive axle anti-lock brake system Sep. 5, 1989

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