Pneumatic rock drills

Details Pneumatic rock drills Pneumatic rock drills

1980-01-09

1982-07-20

Schroeder, Werner H.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

91325, B25D 918

Patent

active

043401210

ABSTRACT:
A pneumatic motor for rock drills and the like having a reciprocating piston with valves at its opposite ends for valving motive air to the piston head from both ends of the cylinder. Large receivers are provided near the respective valves to accommodate availability of air on demand from the valves and to dampen pressure fluctuations. One of the receivers is connected to an external source of fluid under pressure; while the two receivers are interconnected by tubing external to the pneumatic motor itself. This permits the cylinder for the piston to comprise a simple tube provided with exhaust ports only. Additionally, exhaust air and oil from an air motor, which rotates the rock drill, are directed into the area between the lower end of the reciprocating piston and a striking bar for the drill rod to lubricate the reciprocating parts.

REFERENCES:
patent: 1264217 (1918-04-01), Smith
patent: 1355175 (1920-10-01), Smith
patent: 1401003 (1921-12-01), Smith
patent: 2045945 (1936-06-01), Carr
patent: 3685593 (1972-08-01), Amtsberg et al.
patent: 3983788 (1976-10-01), Andersson et al.
patent: 4282937 (1981-08-01), Hibbard
patent: 4287810 (1981-09-01), Thoma

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