Pneumatic percussion machine

Details Pneumatic percussion machine Pneumatic percussion machine

1984-05-16

1986-05-27

Novosad, Stephen J.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173 73, 173116, 175296, B25D 1700, E21B 100

Patent

active

045910049

ABSTRACT:
A pneumatic percussion machine has chambers at its ends with air inlet and exhaust passages thereto, controlled by a piston reciprocable between the chambers, an air supply passage from an axially adjacent end chamber to a third chamber being opened only after the air supply to the other end chamber is closed off.

REFERENCES:
patent: 2800884 (1957-07-01), Mori
patent: 2947519 (1960-08-01), Feucht
patent: 3361219 (1968-01-01), Sears
patent: 4084647 (1978-04-01), Lister
patent: 4094366 (1978-06-01), Gien
patent: 4098352 (1978-07-01), Kita
patent: 4159040 (1979-06-01), Kostylev et al.

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