Tool driving or impacting – Impacting devices – With means for rotating tool
Patent
1977-01-05
1979-03-27
Leppink, James A.
Tool driving or impacting
Impacting devices
With means for rotating tool
175105, E21B 106
Patent
active
041460987
ABSTRACT:
Masonry cutting tool used in conjunction with a pneumatic mechanism, e.g., air-operated hammer, comprising a drill head, a plurality of cutting prongs provided on the drill head, the drill head connected to a hammer shank, and a handle removably joined to said hammer shank for rotation of the drill head during the cutting operation.
REFERENCES:
patent: 739608 (1903-09-01), Kotten
patent: 1160829 (1915-03-01), Blumenthal
patent: 2285702 (1942-06-01), Forss
patent: 2929361 (1960-03-01), Reynolds et al.
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