US Patent No: 4,867,509

Number of patents in Portfolio can not be more than 2000

Apparatus for controlling brake fluid pressure of vehicle

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Apparatus for controlling brake fluid pressure of a vehicle includes a hold valve provided in a first fluid passage so as to control fluid communication between a fluid pressure chamber in a master cylinder and a wheel cylinder, a decay valve provided in a second fluid passage so as to control fluid communication between a wheel cylinder and a reservoir; a supply valve provided in a third fluid passage so as to control the flow of brake fluid from a fluid pressure source to the fluid pressure chamber; an intake valve normally held in its closed position to shut off the third fluid passage, and a valve operating member mounted on the piston for movement therewith, the valve operating member being engageable with the intake valve when the stroke of movement of the piston reaches a predetermined value to thereby move the intake valve to its open position. With this construction, an anti-lock control for preventing the locking of the vehicle wheels can be effected. Further, an auxiliary piston is provided for moving the first-mentioned piston to applying a braking force when a slip of the vehicle wheels reaches a predetermined level, thereby achieving a traction control.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
AKEBONO BRAKE INDUSTRY CO., LTD.TOKYO352
AKEBONO RESEARCH AND DEVELOPMENT CENTRE LTD.TOKYO90

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Maehara, Toshifumi Tokyo, JP 75 266
Sakai, Takashi Tokyo, JP 88 453

Cited Art Landscape

Patent Info (Count) # Cites Year
 
DAIMLER-BENZ AKTIENGESELLSCHAFT (1)
4,726,629 Hydraulic brake-power booster unit 5 1986

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
ADVICS CO., LTD. (5)
6,478,385 Hydraulic brake apparatus for a vehicle 10 2001
6,513,884 Hydraulic brake apparatus for a vehicle 5 2001
6,543,860 Hydraulic pressure brake device 0 2001
6,705,682 Hydraulic brake apparatus for a vehicle 11 2002
6,957,871 Vehicle brake device 7 2003
 
AKEBONO RESEARCH AND DEVELOPMENT CENTRE LTD. (5)
5,071,201 Brake hydraulic pressure control apparatus 1 1990
5,069,508 Brake hydraulic pressure control apparatus 1 1990
5,080,449 Hydraulic brake pressure controlling apparatus for a vehicle 2 1990
5,171,072 Brake hydraulic pressure generator 5 1990
5,098,172 Hydraulic brake pressure generation apparatus for a vehicle 4 1990
 
Allied Signal (1)
5,456,525 Valve for traction control 3 1994
 
DAIMLER AG (1)
5,158,343 Method of shortening the braking distance in critical driving situations by sensing brake pedal speed 54 1991
 
EATON CORPORATION (1)
5,033,798 Trailer brake anti-swing system and method 19 1989
 
MID-AMERICA COMMERCIALIZATION CORPORATION (1)
5,029,948 Trailer anti-swing system and method 12 1989
 
TOYOTA JIDOSHA KABUSHIKI KAISHA (1)
6,805,415 Brake device 5 2001