Hydraulic brake apparatus for a vehicle

Details Hydraulic brake apparatus for a vehicle Hydraulic brake apparatus for a vehicle

2005-11-22

2005-11-22

Butler, Douglas C. (Department: 3683)

Fluid-pressure and analogous brake systems

Speed-controlled

Having a valve system responsive to a wheel lock signal

C060S550000, C060S582000, C188S358000

Reexamination Certificate

active

06966616

ABSTRACT:
A hydraulic brake apparatus is provided with a master cylinder, an assisting device for assisting the master piston to be advanced in response to operation of a brake pedal, and an auxiliary piston having a large diameter portion and a small diameter portion to define first and second pressure transmitting chambers, with the large diameter portion connected to the assisting device. A first valve member is provided for controlling the communication between the first and second pressure transmitting chambers, and a second valve member is provided for controlling a flow of the brake fluid from the first chamber to the second chamber. A valve opening mechanism is provided for opening the first valve member, and mechanically connecting the second valve member with the first valve member, to open the second valve member when the auxiliary piston is retracted from its advanced state to its initial position.

REFERENCES:
patent: 6477839 (2002-11-01), Nishii et al.
patent: 6568183 (2003-05-01), Nishii et al.
patent: 6655513 (2003-12-01), Ishida et al.
patent: 6705682 (2004-03-01), Kusano et al.
patent: 6789857 (2004-09-01), Kusano
patent: 2001-334926 (2001-12-01), None
patent: 2002-53028 (2002-02-01), None
patent: 2002-154422 (2002-05-01), None

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