Hammer drill with separate and interconnectable drive means

Details Hammer drill with separate and interconnectable drive means Hammer drill with separate and interconnectable drive means

1986-05-05

1988-03-22

Yost, Frank T.

Tool driving or impacting

Impacting devices

With means for rotating tool

173104, 173 47, 74665A, 74665L, 60716, B23B 4516

Patent

active

047322187

ABSTRACT:
A hammer drill includes a unit for supplying impact force to a tool inserted into the hammer drill and a unit for supplying rotational forces to the tool. A first drive motor drives the impact force unit and a second drive motor drives the rotational force unit. The motors can be operated independently of one another. A first drive train interconnects the first drive motor to the impact force unit and a second drive train interconnects the second drive motor and the rotational force unit. A coupling device interconnects the first and second drive trains so that at least one of the impact force unit the rotational force unit can be selectively driven by both the first and second motors.

REFERENCES:
patent: 2154591 (1939-04-01), Waseige
patent: 2792723 (1957-05-01), Von Zelewsky
patent: 4192391 (1980-03-01), Hastrent et al.
patent: 4462467 (1984-07-01), Weingartner
patent: 4481841 (1984-11-01), Abthoff et al.
patent: 4568289 (1986-02-01), Heidrich et al.
patent: 4579019 (1986-04-01), Gabriele

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