Electropneumatic hammer drill or chipping hammer

Details Electropneumatic hammer drill or chipping hammer Electropneumatic hammer drill or chipping hammer

1984-03-27

1985-07-16

Yost, Frank T.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

74 22A, 173109, 173116, 408 9, B23B 4502, B25D 1500

Patent

active

045290440

ABSTRACT:
In an electropneumatic drill or chipping hammer with an air cushion transmitting driving force of an exciter piston to a percussion piston, a clutch is provided to interengage a drive motor with the exciter piston. The clutch can be selectively engaged by an axially displacing holding sleeve which positions a tool on the front end of the drill or hammer.

REFERENCES:
patent: 3828863 (1974-08-01), Bleicher et al.
patent: 4158313 (1979-06-01), Smith
patent: 4280359 (1981-07-01), Schmid et al.

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