Fluid control switches

Details Fluid control switches Fluid control switches

1979-09-06

1981-09-29

Cohan, Alan

Fluid handling

Systems

Multi-way valve unit

137353, F16K 1106

Patent

active

042917255

ABSTRACT:
A combined electrical and fluid control switch is disclosed, comprising a casing, at least one operating carriage movable in the casing, and valve means in the casing and operable by the movement of the carriage. The valve means may comprise a valve wall along which a control member is movable. The valve wall is formed with at least one vacuum supply port and at least one vacuum utilization port. The control member includes a sealing member having first and second sealing dam enclosures which provide a double seal to prevent leakage between the atmosphere and the vacuum supply port as the control member is moved between a first position in which the support port and the utilization port are connected together, and a second position in which the utilization port is connected to the atmosphere. Each port preferably has a tapered portion at the intersection between the port and the valve wall.

REFERENCES:
patent: 2071204 (1937-02-01), Hunt
patent: 2489563 (1949-11-01), Denesen
patent: 2966032 (1960-12-01), Weymouth
patent: 3595274 (1971-07-01), Farsandier
patent: 3637961 (1972-01-01), Fiddler et al.
patent: 3637962 (1972-01-01), Fiddler et al.
patent: 3824356 (1974-07-01), Fiddler et al.
patent: 3845257 (1974-10-01), Fiddler et al.
patent: 3906178 (1975-09-01), Fiddler et al.
patent: 3942555 (1976-03-01), Raab et al.
patent: 4054761 (1977-10-01), Raab et al.
patent: 4126153 (1978-11-01), Raab

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