Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1987-10-06
1989-07-04
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91376R, F15B 910
Patent
active
048439487
ABSTRACT:
A vacuum-operated brake booster comprises an axially movable power piston and a plunger axially movable in a cavity of the power piston. A valve disposed within the cavity cooperates with seats on the plunger and power piston to regulate pressure in a variable pressure chamber. A key serves as a stop to limit travel of the power piston and plunger. The key includes a base portion and a pair of parallel legs which extend into a radial hole of the power piston. The legs straddle and press against the plunger. Elastic retainers are snap-fit onto the ends of the key member. The elastic retainers are wider than the radial hole to retain the key in the hole.
REFERENCES:
patent: 4043251 (1977-08-01), Ohmi
patent: 4406213 (1983-09-01), Haar
patent: 4472997 (1984-09-01), Ohmi
patent: 4487105 (1984-12-01), Harrison
patent: 4587885 (1986-05-01), Boehm et al.
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.
patent: 4643076 (1987-02-01), Satoh
Miwa Akihiko
Sugiura Yuzuru
Aisin Seiki Kabushiki Kaisha
Garrett Robert E.
Williamson Mark A.
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