Pneumatic percussion machines

Details Pneumatic percussion machines Pneumatic percussion machines

1975-01-20

1976-07-20

Purser, Ernest R.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

91234, 91325, 173 66, 173136, E21B 106

Patent

active

039701530

ABSTRACT:
A pneumatic percussion machine such as a drill, having a piston reciprocating in a casing, chambers formed in casing at or towards the ends of the piston, the arrangement permitting compressed air to be supplied alternatively to the chambers, the compressed air to the one chamber being supplied through a projecting member located co-axially in the casing and over which the piston reciprocates and compressed air from the other chamber being exhausted through the projecting member to the other chamber.

REFERENCES:
patent: 629967 (1899-08-01), Peck et al.
patent: 727954 (1903-05-01), Iler
patent: 870178 (1907-11-01), Johnson

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