Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1986-03-05
1989-01-31
Look, Edward K.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, F15B 910
Patent
active
048007994
ABSTRACT:
The present invention relates to a booster for automobile braking systems. The booster includes a booster housing with a movable wall disposed in the booster housing and dividing the interior of the housing into a constant pressure chamber connected to a vacuum source and a variable pressure chamber. A hub member is connected to the movable wall and has a projection extending air-tightly from the housing. The hub member is slidable relative to the housing. A control valve is disposed in the hub member and is manually actuated to interrupt fluid communication between the constant and vairable pressure chambers and to introduce ambient air into the variable pressure chamber thereby to generate an operational force of said movable wall. An output member transmits the operational force of the movable wall and the manual force applied to the control valve through a reaction force mechanism to an output arrangement. A partition wall is connected to and disposed in the housing for dividing the variable pressure chamber into a first and a second chamber. The first variable pressure chamber is normally connected to the control valve and the second variable pressure chamber is disposed next to the movable wall. A normally open valve controls fluid communication beteween the first and second variable pressure chambers with the normally open valve closing in response to an input signal.
REFERENCES:
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patent: 4434619 (1984-03-01), Kobayashi
patent: 4445333 (1984-05-01), Coleman
patent: 4453450 (1984-06-01), Horsting
patent: 4472997 (1984-09-01), Ohmi
patent: 4587884 (1986-05-01), Tsubouchi
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patent: 4590845 (1986-05-01), Tateoka et al.
patent: 4594937 (1986-06-01), Meynier et al.
patent: 4598625 (1986-07-01), Belart
patent: 4619185 (1986-10-01), Mori et al.
Aisin Seiki Kabushiki Kaisha
Look Edward K.
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