Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1980-07-23
1982-09-21
Maslousky, Paul E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
92168, 92170, F15B 910, F16J 1102
Patent
active
043500773
ABSTRACT:
An improved differential pressure operated servo-booster herein disclosed comprises a booster shell, a forward first fluid chamber and a rearward second fluid chamber defined by a booster piston within the booster shell and normally in communication with a vacuum source, a cylindrical valve body integrally extended at the rearward surface of the booster piston and slidably supported on the rearward side wall of the booster shell through a plain bearing, a control valve received within the cylindrical valve body to permit the second fluid chamber to selectively communicate with the first fluid chamber or atmosphere, and an input rod disposed with the cylindrical valve body and operatively connected to the control valve, the plain bearing being formed integral with the rearward side wall of the booster shell in a seamless fashion. Preferably, the booster shell and the plain bearing are integrally formed of a synthetic resin, and the cylindrical valve body is formed of a synthetic resin of higher hardness than that of the plain bearing.
REFERENCES:
patent: 2457721 (1948-12-01), Price
patent: 3104590 (1963-09-01), Kellogg et al.
patent: 3177777 (1965-04-01), Kenrick
Maslousky Paul E.
Nissin Kogyo Kabushiki Kaisha
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