Combination fluid nozzle and backflow valve

Details Combination fluid nozzle and backflow valve Combination fluid nozzle and backflow valve

1981-10-21

1983-02-08

Novosad, Stephen J.

Boring or penetrating the earth

With means movable relative to tool or shaft to control...

Valve prevents upward flow

175340, E21B 1018

Patent

active

043724027

ABSTRACT:
A valve-nozzle assembly is disclosed for use in a rock-drilling bit, which assembly utilizes a backflow valve with a replaceable nozzle insert.

REFERENCES:
patent: 3261413 (1966-07-01), Kistler, Jr.
patent: 3685601 (1972-08-01), Hollingshead

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