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Class Information
Number: 303/122.13
Name: Fluid-pressure and analogous brake systems > Speed-controlled > With failure responsive means > Pressure failure > Auxiliary pressure failure
Description: Pressure failure in which the faulty operation of a backup system, used in case of a failure or malfunction of a main hydraulic pressure system, is sensed.










Sub-classes under this class:

Class Number Class Name Patents
303/122.14 With warning 19


Patents under this class:
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Patent Number Title Of Patent Date Issued
8662602 Brake control apparatus Mar. 4, 2014
8376476 Brake system in electric drive dump truck Feb. 19, 2013
8226176 Brake system Jul. 24, 2012
8167383 Brake control apparatus May. 1, 2012
7517027 Hydraulic brake device Apr. 14, 2009
7393065 Redundant braking system Jul. 1, 2008
7374253 Method for monitoring the air bleeding quality of an electrohydraulic braking system May. 20, 2008
6805415 Brake device Oct. 19, 2004
6705683 Method for monitoring the emergency braking capability of an electrohydraulic braking system Mar. 16, 2004
6494545 Apparatus for diagnosing accumulator based on fluid pressure in its fluid-tightly sealed state Dec. 17, 2002
6425644 Braking pressure control apparatus having device for diagnosing manually operated hydraulic system Jul. 30, 2002
6354672 Braking system wherein brake cylinder is communicated with pedal-operated pressure source upon failure of pump-operated pressure source Mar. 12, 2002
6244672 Method and apparatus for controlling a brake system Jun. 12, 2001
6155653 Method and apparatus for pump activation during ABS/TCS control Dec. 5, 2000
6109879 Fluid pressure source apparatus Aug. 29, 2000
6082830 Brake system having variable pump pressure control and method of pressure control Jul. 4, 2000
6062657 Brake failure compensation system and method May. 16, 2000
5954406 Brake control apparatus for a vehicle Sep. 21, 1999
5884986 Anti-lock brake control system for automotive vehicles Mar. 23, 1999
5826953 Hydraulic braking system especially for motor vehicles Oct. 27, 1998
5743598 Anti-skid control apparatus Apr. 28, 1998
5700067 Hydraulic braking system, especially for motor vehicles Dec. 23, 1997
5695260 Control apparatus for detecting malfunctioning of pressure sensors in an automotive fluid pressure circuit Dec. 9, 1997
5683149 Hydraulic pressure control apparatus having device for estimating amount of fluid in reservoir to which the fluid is discharged to reduce cylinder pressure Nov. 4, 1997
5186524 Hydraulic brake system Feb. 16, 1993
5186525 Hydraulic braking pressure control system for vehicle Feb. 16, 1993
5106170 Hydraulic braking pressure control system Apr. 21, 1992
5031968 Electronically controlled brake device Jul. 16, 1991
4964676 Brake unit Oct. 23, 1990
4929036 Hydraulic brake pressure control device for a vehicle May. 29, 1990
4900103 Brake system with anti-skid control for motor vehicles Feb. 13, 1990
4858737 Hydraulic braking device for automobile vehicle Aug. 22, 1989
4812777 Manually/electrically operated brake system Mar. 14, 1989
4810042 Brake pressure control apparatus Mar. 7, 1989
4776646 Hydraulic vehicle brake system Oct. 11, 1988
4717210 Brake-slip-controlled brake system Jan. 5, 1988
4708404 Hydraulic brake system with hydraulic brake force boosting Nov. 24, 1987
4676558 Brake system for automotive vehicles Jun. 30, 1987
4655509 Hydraulic anti-skid apparatus for automotive vehicles Apr. 7, 1987
4655512 Brake system having a brake booster Apr. 7, 1987
4641893 Hydraulic braking pressure control apparatus for vehicles Feb. 10, 1987
4629258 Hydraulic dual circuit brake system for road vehicles Dec. 16, 1986
4555144 Method and apparatus for controlling and monitoring hydraulic brake slip Nov. 26, 1985
4530209 Control arrangement for a vehicular brake system with hydraulic brake booster Jul. 23, 1985
4492413 Control arrangement for an antiskid hydraulic braking system of a vehicle Jan. 8, 1985
4489989 Auxiliary power assisted master cylinder arrangement for a vehicle brake system Dec. 25, 1984
4462642 Vehicle brake system Jul. 31, 1984
4457563 Anti-skid hydraulic braking systems for vehicles Jul. 3, 1984
4415210 Arrangement for controlling the pressure in brake actuating cylinders of a vehicle Nov. 15, 1983
4405181 Brake valve Sep. 20, 1983

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