Drill hammer

Details Drill hammer Drill hammer

1999-11-08

2000-09-05

Smith, Scott A.

Tool driving or impacting

Impacting devices

With means for rotating tool

173201, B25D 1104

Patent

active

061128309

ABSTRACT:
The invention concerns a drill hammer having an air cushion percussion mechanism with which an energizing bushing (24) is disposed concentric to the drill tool axis (10) and forms a cavity (26) containing the air cushion in which a percussion piston (28) can move back and forth, and with a wobble drive device (34) for moving the energizing bushing (24) back and forth in the direction of the drill tool axis (10), the rotation element (36) of which driving the nutating disk (42) being disposed for rotational drive parallel to the drill tool axis (10) at a separation therefrom. In order to increase the smoothness of running of the drill hammer, a weight (50) is disposed under restrictive guidance for linear back and forth motion parallel to the drill tool axis (10) in response to the action of the nutating disk (42), at that side of the nutating disk (42) lying diametrically across from the energizing bushing (24).

REFERENCES:
patent: 4284148 (1981-08-01), Wanner et al.
patent: 4719976 (1988-01-01), Bleicher et al.
patent: 5052497 (1991-10-01), Houben et al.
patent: 5125461 (1992-06-01), Hoser
patent: 5379848 (1995-01-01), Rauser
patent: 5435397 (1995-07-01), Demuth

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