Air hammer

Details Air hammer Air hammer

1993-02-24

1994-01-11

Smith, Scott

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173128, 173212, B25D 904

Patent

active

052772608

ABSTRACT:
A percussion drilling apparatus having an outer casing, a fluted inner sleeve affixed to the outer casing, a hammer piston having a longitudinal opening therethrough adapted to fit around extensions of a cyclic valve positioned at the top of the inner casing, and a foot valve mounted atop a drilling bit at the bottom of the apparatus. An air channel positioned between the inner sleeve and outer casing is adapted to cooperate with channels on a reciprocating hammer piston to alternately drive the hammer piston up and down.

REFERENCES:
patent: 3527239 (1970-09-01), Boom
patent: 3599730 (1971-08-01), Tyreso et al.
patent: 3606930 (1971-09-01), Curington
patent: 3804181 (1974-04-01), Curington et al.
patent: 4084646 (1978-04-01), Kurt
patent: 4591004 (1986-05-01), Gien
patent: 4790390 (1988-12-01), Sweeny

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