Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1996-05-17
1998-01-06
Lopez, F. Daniel
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
F15B 910
Patent
active
057042705
ABSTRACT:
In a vacuum brake booster including a housing the interior of which is subdivided into negative and variable pressure chambers by means of a movable wall assembled therein, a piston body assembled with the movable wall to be axially movable in the housing, a valve plunger axially slidably coupled within the piston body, a first annular valve element formed on an outer end of the valve plunger, a second valve element formed on an internal cylindrical portion of the piston body, and a control valve assembly having a first annular sealing portion cooperable with the first valve element and a second annular sealing portion united with the first annular sealing portion to cooperate with the second valve element, the first valve element is arranged in a position spaced in an axial direction from the first valve element, and the first and second annular sealing portions of the control valve assembly are spaced in the axial direction to cooperate with the first and second valve elements.
REFERENCES:
patent: 4005638 (1977-02-01), Takeuchi
patent: 4598625 (1986-07-01), Belart
patent: 5546846 (1996-08-01), Bauer
patent: 5601008 (1997-02-01), Miwa et al.
Aisin Seiki Kabushiki Kaisha
Lopez F. Daniel
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