Air relay

Details Air relay Air relay

1982-05-07

1984-08-14

Cohan, Alan

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

13762414, F16K 1114

Patent

active

044650906

ABSTRACT:
An oscillating or timing valve, sometimes known as an air relay, suitable for use with a chemical injector. A valve housing with sliding poppet, sliding piston and adjustable needle, with the poppet movable in one direction to close an exhaust port and with the piston movable in the opposite direction to engage the poppet and close the outlet or drive port and open the exhaust port. The piston oscillates between the drive port open and the drive port closed conditions, with the timing adjusted by varying the needle orifice and the size of the chamber fed through the needle orifice. The oscillating valve does not utilize any diaphragms or springs.

REFERENCES:
patent: 2760511 (1956-08-01), Greeff
patent: 3380348 (1968-04-01), Kroffke
patent: 3387563 (1965-06-01), Williams et al.
patent: 3857411 (1974-12-01), Moon
patent: 4370996 (1983-02-01), Williams

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