Pneumatically-operated valve

Details Pneumatically-operated valve Pneumatically-operated valve

1989-04-24

1990-02-27

Cohan, Alan

Valves and valve actuation

Fluid actuated or retarded

Piston type expansible chamber reciprocating valve actuator

251 636, F16K 31122

Patent

active

049039393

ABSTRACT:
A pneumatically-operated valve in which a valve actuator is formed of two separate parts: a driving member having a plurality of sealed pistons fixed to a piston rod in series to be operated by air pressure, and a valve operating member which comes into contact with a clean fluid and which does not have any soft substances such as O-rings which are likely to be impaired by ultrasonic cleaning. The valve facilitates the cleaning of the members during the process of manufacture and furthermore can provide a great deal of output for its size without contaminating the clean fluid during use.

REFERENCES:
patent: 2675204 (1954-04-01), Johnson
patent: 3180235 (1965-04-01), Schmetz
patent: 3485141 (1969-12-01), Ott
patent: 3698688 (1972-10-01), Kutz
patent: 3979105 (1976-09-01), Pool
patent: 4182369 (1980-11-01), Akkerman
patent: 4237920 (1980-12-01), Norsian
patent: 4596267 (1986-06-01), Tosseghini

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