Self-purging injection valve

Details Self-purging injection valve Self-purging injection valve

1975-03-24

1976-10-12

Cohan, Alan

Fluid sprinkling, spraying, and diffusing

With cleaning means, drip collecting, waste disposal or soil...

Nozzle cleaner, flusher or drainer

137239, 137315, 13762548, 239125, B05B 1502

Patent

active

039853004

ABSTRACT:
This invention discloses a self-purging injection valve comprising at least one supply port, at least one purging waste port, an injection port and an injection port barrel, the injection port barrel projecting from the injection port through the valve in communication with said supply port and purging waste port, and a valve stem having an internal passage and being adapted to slide within the injection port barrel between a purging position and an injection position, to seal the injection port, to block the direct flow of materials within the injection port barrel external to the valve stem between the supply port and the purging waste port, but to otherwise permit the flow of purging fluids from the supply port along the internal passage and about the valve stem within the injection port barrel to the purging waste port when said valve stem is in the purging position and to open the injection port and to permit the flow of materials from the supply port within and without the valve stem to the injection port when said valve stem is in the injection position, and a valve stem control means to control the movement of the valve stem, and a purging waste port control means to close the purging waste port in the injection position and to open the purging waste port in the purging position.

REFERENCES:
patent: 2175652 (1939-10-01), Trier et al.
patent: 2579004 (1951-12-01), Joyce
patent: 3587970 (1971-06-01), Tindall et al.
patent: 3685533 (1972-08-01), Krechel

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