Impact device

Details Impact device Impact device

1978-07-06

1982-01-05

Staab, Lawrence J.

Tool driving or impacting

Drive controlled by relative movement of advance causing or...

B23Q 5033

Patent

active

043089224

ABSTRACT:
An impact device comprises a cylindrical casing accommodating a hammer piston imparting blows to a working tool, which reciprocates under the action of compressed air admitted from a compressed air line through a control valve air distribution arrangement and a mechanism for automatically starting the device. The mechanism for automatically starting the device comprises a hollow two-step cylinder secured to the cylindrical casing accommodating a two-step piston which incorporates a valve co-operating with a tappet. The two-step piston is mounted in the hollow two-step cylinder in such a manner that an annular chamber is defined between the outer surface of the piston and the inner surface of the cylinder, the piston co-operating with the valve.

REFERENCES:
patent: 1126096 (1915-01-01), Schmidt

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