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Class Information
Number: 303/84.1
Name: Fluid-pressure and analogous brake systems > Flow retarder
Description: Subject matter including means for interrupting movement of fluid as it is being distributed.










Sub-classes under this class:

Class Number Class Name Patents
303/84.2 Isolation valve 72


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8573711 Vehicle braking apparatus suppressing excessive slip of wheel during braking Nov. 5, 2013
7527338 Hydrodynamic retarder control apparatus May. 5, 2009
7150507 Self cleaning orifice Dec. 19, 2006
6966614 Architecture for a hydraulic circuit Nov. 22, 2005
6209969 Hydraulic vehicle brake system with wheel slip control Apr. 3, 2001
6106079 Brake system valve having an anti-compounding feature Aug. 22, 2000
5979997 Hydraulic brake control apparatus Nov. 9, 1999
5722738 Hydraulic brake system with brake slip control and traction slip control Mar. 3, 1998
5697680 Vehicle brake pressure controller Dec. 16, 1997
5692812 Brake regulator with double valve Dec. 2, 1997
5549361 Electronic-hydraulic brake boost using a power steering supply Aug. 27, 1996
5547266 Brake pressure controller for a hydraulic vehicle brake system Aug. 20, 1996
5486040 Brake pressure controller for a hydraulic vehicle brake system Jan. 23, 1996
5460436 Slip-controlled brake system Oct. 24, 1995
5456523 Multi-wheel brake system Oct. 10, 1995
5429424 Pneumatic brake for railway locomotives and motor cars Jul. 4, 1995
5417480 Brake system for a motor vehicle May. 23, 1995
5390987 Brake system metering valve with a pressure actuated brake switch Feb. 21, 1995
5390993 Pressure control valve for slip-controlled hydraulic brake systems Feb. 21, 1995
5374113 Anti-skid brake control system Dec. 20, 1994
5370450 Brake pressure control apparatus Dec. 6, 1994
5361877 Diaphragm-type pneumatic brake actuator with closing valve Nov. 8, 1994
5333945 Brake pressure control apparatus Aug. 2, 1994
5297857 Direct acting electro-hydraulic braking system with regulated leak rate Mar. 29, 1994
5290096 Pressure control valve slip-controlled hydraulic brake systems Mar. 1, 1994
5288140 Parking brake controller with slower actuation in the event of a malfunction Feb. 22, 1994
5249853 Hydraulic anti-lock brake system Oct. 5, 1993
5244261 Antiskid modulator with flow regulating and passage selecting valves Sep. 14, 1993
5205618 Hydraulic brake system Apr. 27, 1993
5199769 Valve, in particular for slip-controlled hydraulic brake systems Apr. 6, 1993
5190356 AND-type control valve for a tractor-trailer braking system Mar. 2, 1993
5190362 Pressure limiting valve with uncoupled valve closing body and tappet Mar. 2, 1993
5167443 Anti-skid system for a motor vehicle Dec. 1, 1992
5149178 Hydraulic braking system for an automotive vehicle Sep. 22, 1992
5127713 Anti-lock brake system for automotive vehicles Jul. 7, 1992
5076647 Piloted pressure relief valve Dec. 31, 1991
5051063 Leakage-type pressure regulator for a hydraulic circuit Sep. 24, 1991
5046788 Pressure piloted release valve Sep. 10, 1991
5020864 Braking system for vehicle Jun. 4, 1991
4972873 Shuttle valve with spike-apply damping Nov. 27, 1990
4936334 Differential pressure shuttle valve Jun. 26, 1990
4858737 Hydraulic braking device for automobile vehicle Aug. 22, 1989
4812777 Manually/electrically operated brake system Mar. 14, 1989
4794267 Anti-lock braking system check valve with build orifice Dec. 27, 1988
4792192 Automatic brake source select system Dec. 20, 1988
4790414 Railway deceleration controller for brake Dec. 13, 1988
4736989 Dual deceleration and pressure-sensitive proportioning valve Apr. 12, 1988
4696521 Vehicle anti-skid air braking systems Sep. 29, 1987
4691520 Hydraulic brake system Sep. 8, 1987
4679865 Relay valve device Jul. 14, 1987

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