Impact hammer assembly for drilling rock

Details Impact hammer assembly for drilling rock Impact hammer assembly for drilling rock

1988-04-14

1989-06-20

Yost, Frank T.

Tool driving or impacting

Impacting devices

With means for rotating tool

173111, B23B 1516

Patent

active

048402354

ABSTRACT:
An impact hammer assembly for use on a drill head intended for drilling hard material, such as rock. The hammer comprises an elongated hollow case opened at one end and a drill bit provided with a rear stem that is mounted in the hollow case, through its open end, for free rotation and limited slidable displacement. A pair of pins extends transversally through the case on either side of the stem of the drill bit to retain the same in the case.

REFERENCES:
patent: 1644110 (1927-10-01), Coven et al.
patent: 3199594 (1965-08-01), Kinley
patent: 4359109 (1982-11-01), Truong-Cao

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