Rotary hammer drill

Details Rotary hammer drill Rotary hammer drill

1991-08-01

1993-04-06

Yost, Frank T.

Tool driving or impacting

Impacting devices

With impact cushioning means

173104, 279 82, 279157, 408226, B23B 3106

Patent

active

051995085

ABSTRACT:
An adaptor for attaching a bit to a rotary hammer drill and for attenuating the hammering force from the drill to the bit. The adaptor comprises a tubular body for engagement with the shank of a drill bit, the body having a closed rear end. Means is provided within the body at the closed end for engagement with the rear end of the shank of the drill bit to attenuate the hammering force.

REFERENCES:
patent: 2963298 (1960-12-01), Better et al.
patent: 3921729 (1975-11-01), Schmuck
patent: 4131165 (1978-12-01), Wanner et al.
patent: 4274774 (1981-06-01), Haga et al.
patent: 4898250 (1990-02-01), Neumaier et al.

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