Seal unit for brake booster

Details Seal unit for brake booster Seal unit for brake booster

1990-08-15

1991-11-05

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, 92 48, 92 98D, F15B 910, F01B 1900

Patent

active

050623486

ABSTRACT:
A seal unit is provided for a brake booster such as of a tandem type which includes a center plate within its shell. The brake booster includes annular means disposed within the shell for maintaining a hermetic seal between the center plate and a valve body. An axial portion of the center plate is formed with an axially extending cylindrical portion, the end of which is folded radially inward to define a U-shaped fold. The annular seal means is fitted inside the cylindrical portion, with its part disposed between the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the fold. This effectively prevents the annular seal means from being withdrawn from the center plate.

REFERENCES:
patent: 2549818 (1951-04-01), Joy
patent: 2773511 (1956-12-01), Mercier
patent: 2919718 (1960-01-01), Mercier
patent: 2932321 (1960-04-01), Mercier
patent: 3411414 (1968-11-01), Brown et al.
patent: 3478519 (1969-11-01), Eggstein
patent: 3897718 (1975-08-01), Gardner et al.
patent: 3958497 (1976-05-01), Gardner et al.
patent: 4512237 (1985-04-01), Endoh et al.
patent: 4619185 (1986-10-01), Mori et al.
patent: 4738186 (1988-04-01), Rossigno et al.
patent: 4793242 (1988-12-01), Kobayashi
patent: 4898081 (1990-02-01), Fecher

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