Bore hole air hammer

Details Bore hole air hammer Bore hole air hammer

1975-04-07

1979-03-27

Pate, III, William F.

Tool driving or impacting

Work cleansing

Cleansing fluid passage through hammer head

173 80, E21B 106

Patent

active

041460979

ABSTRACT:
An air hammer embodying an outer housing structure connectable to a rotatable drill pipe string through which compressed air is conducted. A hammer piston reciprocates in the housng structure, compressed air being directed alternately to the upper and lower ends of the piston to effect its reciprocation in the structure, each downward stroke inflicting an impact blow upon the anvil portion of an anvil bit extending upwardly within the lower portion of the housing structure. The compressed air exhausts through a non-metallic elastic synthetic resin sleeve or tube fixed to the anvil and extending slidably into the lower portion of the hammer piston, the sleeve being deflectable laterally in the event of misalignment between the hammer piston and the anvil to prevent fatigue failure of the sleeve.

REFERENCES:
patent: RE26038 (1966-06-01), Collier et al.
patent: 1599197 (1926-09-01), Barnett
patent: 1689275 (1928-10-01), Bayles
patent: 1868684 (1932-07-01), Bayles
patent: 3085555 (1963-04-01), Morrison
patent: 3735820 (1973-05-01), Curington
patent: 3858666 (1975-01-01), Bailey et al.

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