Expansible chamber devices – With linkage or transmission engaging portion intermediate...
Patent
1980-01-03
1982-07-06
Maslousky, Paul E.
Expansible chamber devices
With linkage or transmission engaging portion intermediate...
92DIG1, 92130R, 92166, 92140, 74104, 251 58, F01B 900
Patent
active
043376916
ABSTRACT:
A valve driving apparatus is provided with cylindrical bearing members made of a synthetic resin or a copper alloy and used for a piston rod and for a drive shaft, a lining member made of a synthetic resin for coating the inner wall of an apparatus and a resilient member made of a synthetic rubber or a synthetic resin and inserted in a groove of a piston so as to protect the valve driving apparatus from the disadvantages of wear, frictional resistance and energy loss which are produced by a reciprocating movement of the piston and the piston rod. Also a valve driving apparatus utilizing a scotch yoke type movement conversion-transmission mechanism is provided with cylindrical bearing members made of a synthetic resin or a copper alloy and attached to pins installed on a piston rod so as to prevent the aforementioned disadvantages from occurring between the pins and the scotch yokes. And a spring-return type valve driving apparatus is provided with one or two cylindrical thrust bearing members disposed between one end of a compression coil spring and a box cover and/or between the other end of the spring and a spring holder so as to avoid a twisting phenomenon of the spring.
REFERENCES:
patent: 3152520 (1964-10-01), Heese
patent: 3261266 (1966-07-01), Ledeen et al.
patent: 3376895 (1968-04-01), Pray
patent: 3507192 (1970-04-01), Stokke
patent: 3614913 (1971-10-01), Clark
Kitazawa Valve Co., Ltd.
Maslousky Paul E.
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