Hollow percussion drill rod with seal for cleaning fluid inlet t

Details Hollow percussion drill rod with seal for cleaning fluid inlet t Hollow percussion drill rod with seal for cleaning fluid inlet t

1976-06-22

1977-11-22

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277168, 173 78, 285110, 279 20, 408 59, F16K 4114, B25D 1702, B25D 1722

Patent

active

040592790

ABSTRACT:
A percussion drill in which a piston or ram is driven against the end of a drill rod comprises a tube extending through the piston and reaching into a bore at the end of the drill rod to deliver a fluid thereto for moving debris formed by the drilling operation. A socket is received in a bore of the drill rod and has a resilient lip which is deflected inwardly by the flared mouth of the drill rod bore while the tube has a tapered end which is engaged by the wall of a tapered bore formed in the socket.

REFERENCES:
patent: 2164886 (1939-07-01), Reufer
patent: 2506069 (1950-05-01), Dalton
patent: 2691418 (1954-10-01), Connolly
patent: 2725214 (1955-11-01), Lofqvist
patent: 2790624 (1957-04-01), Lofqvist et al.
patent: 2997024 (1961-08-01), McLean
patent: 3487748 (1970-01-01), Grage
patent: 3714993 (1973-02-01), Nolley
patent: 3941196 (1976-03-01), Curington et al.

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