Vacuum power servo booster

Details Vacuum power servo booster Vacuum power servo booster

1981-11-10

1985-10-15

Hershkovitz, Abraham

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91369A, 1376275, 267179, F15B 910

Patent

active

045466912

ABSTRACT:
A vacuum power servo booster having an improved retainer for an annular seat of a control valve body. A spring seat for a compression spring which presses the annular seat against the valve housing is formed at the front end portion of a retainer. A recess is formed on the front side of the spring seat to receive the skirt of the control valve body. The spring seat is formed by bending a smaller diameter portion of the retainer inwardly prior to assembly. In this manner, the longitudinal axis of the retainer is made to substantially coincide with that of the control valve body.

REFERENCES:
patent: 3661054 (1972-05-01), Brown
patent: 3754450 (1973-08-01), Putt
patent: 3780620 (1973-12-01), Gardner
patent: 3826175 (1974-07-01), Thiel et al.
patent: 4117769 (1978-10-01), Carre et al.
patent: 4227371 (1980-10-01), Takeuchi
patent: 4256016 (1981-03-01), Thomas
patent: 4279193 (1981-07-01), Satoh
patent: 4399736 (1983-08-01), Schubert

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