Pneumatic control system and valve construction therefor or the

Details Pneumatic control system and valve construction therefor or the Pneumatic control system and valve construction therefor or the

1974-07-22

1976-01-06

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

13762566, 251 614, 123117A, F16K 31365

Patent

active

039305155

ABSTRACT:
A pneumatic control system having a source of pneumatic fluid and a pneumatically operated device to be operated by the source when interconnected thereto by a valve construction when the same is in one operating condition thereof. The valve construction interconnects the atmosphere to the device when in another operating condition thereof. The valve construction has a housing provided with a chamber and three spaced ports leading to the chamber, one of the ports being interconnected to the source of fluid, another of the ports being interconnected to the device and the remaining port being interconnected to the atmosphere. A valve seat separates the one port from the other port and the remaining port. A movable valve member controls the valve seat, the valve member closing the valve seat when the valve construction is in the other condition thereof and opening the valve seat when the valve construction is in the one condition thereof. A pneumatically operated actuator moves the valve member relative to the valve seat, the actuator being controlled by the source of fluid through the one port of the housing.

REFERENCES:
patent: 2474772 (1949-06-01), Ashton
patent: 3512560 (1970-05-01), Weise
patent: 3613710 (1971-10-01), Oberthur
patent: 3683968 (1972-08-01), Akeley
patent: 3704697 (1972-12-01), Weymann
patent: 3779220 (1973-12-01), Wu
patent: 3789811 (1974-02-01), Franz et al.
patent: 3791398 (1974-01-01), Vickery

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