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Class Information
Number: 188/356
Name: Brakes > Operators > Fluid pressure > Road vehicle > With nonmanual fluid-power source > Vacuum power
Description: Device wherein the non-manual power source is of the vacuum or sub-atmospheric pressure type.










Sub-classes under this class:

Class Number Class Name Patents
188/357 And manual 22


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8651585 Towed vehicle braking apparatus Feb. 18, 2014
8646431 Vehicle provided with valve-stop-mechanism-equipped internal combustion engine Feb. 11, 2014
8645003 Braking control system and method for vehicle Feb. 4, 2014
8430458 Towed vehicle braking apparatus Apr. 30, 2013
8375843 Brake booster device with damping element Feb. 19, 2013
7549711 Vacuum pressure booster Jun. 23, 2009
7475951 Control system for brake vacuum pump Jan. 13, 2009
7255408 Vacuum booster Aug. 14, 2007
7040718 Calibration process for a servomotor May. 9, 2006
7014276 Vacuum booster Mar. 21, 2006
6874602 Braking apparatus for a vehicle Apr. 5, 2005
6872165 Parking brake system for a gearbox of a motor vehicle Mar. 29, 2005
6739676 Braking system having vacuum booster whose boosting ratio is lowered at fixed transition point at which wheel cylinder pressure increase is initiated May. 25, 2004
6612660 Vacuum booster apparatus and a brake apparatus Sep. 2, 2003
6554374 Tandem brake booster for automobiles Apr. 29, 2003
6513883 Hydraulic brake for a vehicle Feb. 4, 2003
6412883 Vacuum booster apparatus and a brake apparatus Jul. 2, 2002
6412881 Braking system having master cylinder piston receiving booster output and rear chamber fluid pressure from selectively activated pressure increasing device Jul. 2, 2002
6349995 Brake control system for a vehicle Feb. 26, 2002
6347842 Braking hydraulic pressure source apparatus wherein assisting pressure is electrically controlled to establish predetermined overall boosting ratio Feb. 19, 2002
6305757 Brake booster negative pressure controller Oct. 23, 2001
RE37373 Vacuum servo apparatus Sep. 18, 2001
6273526 Fluid pressure booster and brake system using the same Aug. 14, 2001
6209968 Braking system for motor vehicles Apr. 3, 2001
6203118 Braking system Mar. 20, 2001
6129423 Brake force control apparatus Oct. 10, 2000
6098780 Tracking, propulsion and braking system for bridge tripper/hopper car Aug. 8, 2000
6062656 Brake system for motor vehicles May. 16, 2000
6039411 Brake control system for a vehicle Mar. 21, 2000
6027182 Brake force control apparatus for properly performing both an ABS function and a BA function Feb. 22, 2000
6006648 Method of operating a pneumatic brake servo-unit Dec. 28, 1999
5979282 Cutter-infeed apparatus for cutting installations for tapes, in particular magnetic tapes Nov. 9, 1999
5979292 Method of operating a pneumatic brake booster Nov. 9, 1999
5971500 Electronically adjustable brake system for motor vehicles Oct. 26, 1999
5967628 Vehicular brake system Oct. 19, 1999
5961189 Brake system for automotive vehicles with pneumatic brake power booster Oct. 5, 1999
5951119 Braking system for motor vehicles Sep. 14, 1999
5951117 Boosted braking system with automatically-controlled reaction Sep. 14, 1999
5890775 Vacuum servo unit for a vehicle braking system Apr. 6, 1999
5855420 Electronically controlled brake booster and method of operation thereof Jan. 5, 1999
5848827 Braking assistance pneumatic servomotor with improved valve Dec. 15, 1998
5845558 Vacuum servo unit for a vehicle braking system Dec. 8, 1998
5823637 Universal vacuum pump apparatus and method Oct. 20, 1998
5746057 Electronic control type brake booster for vehicle May. 5, 1998
5735581 Valve assembly for controlling a pneumatic brake booster with an electromagnetic actuation means Apr. 7, 1998
5713638 Brake system with a power brake device Feb. 3, 1998
5709437 Vehicle braking system Jan. 20, 1998
5704455 Automatic brake booster Jan. 6, 1998
5683147 Vacuum servo apparatus Nov. 4, 1997
5658055 Vehicle brake system having an electronically controlled booster Aug. 19, 1997

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