Fluid pressure booster

Details Fluid pressure booster Fluid pressure booster

2006-03-27

2009-10-27

Lopez, Daniel (Department: 3745)

Power plants

Pressure fluid source and motor

Pulsator

Reexamination Certificate

active

07607300

ABSTRACT:
A fluid pressure booster includes: a control piston in which brake operation input acts in an advancing direction, and reaction based on fluid pressure of a booster fluid pressure generation chamber that generates fluid pressure for actuating a master piston acts in a retracting direction; a pressure increasing valve provided between the booster fluid pressure generation chamber and a fluid pressure generation source so as to open at the time of advance of the control piston and close at the time of retraction of the control piston; and a pressure reducing valve provided between a release chamber and the booster fluid pressure generation chamber so as to close at the time of the advance of the control piston and open at the time of the retraction of the control piston. The pressure increasing valve includes first valve means and second valve means that sequentially open according to an increase in the brake operation input, and a seal diameter of the second valve means is larger than that of the first valve means. Thus, it is possible to enhance initial response of the pressure increasing valve, and also enhance response of the pressure increasing valve when a brake operation member is strongly operated.

REFERENCES:
patent: 2002/0007635 (2002-01-01), Becker
patent: 2610586 (1977-09-01), None
patent: 2000-318598 (2000-11-01), None
patent: 2002-308085 (2002-10-01), None
patent: 2003-285731 (2003-10-01), None

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