Electric hand power tool

Tool driving or impacting – Impacting devices – With means for rotating tool

Reexamination Certificate

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Details

C173S109000

Reexamination Certificate

active

06918450

ABSTRACT:
An electric hand power tool formed as a hammer drill or an impact hammer drill has a housing, a drive transmission received in the housing and having an intermediate transmission for turning a tool, an impact mechanism with a swinging drive for delivering axially oriented impacts to the tool, and a drive shaft, a transmission toothed wheel fixed on the transmission shaft for turning the latter, a drive bearing provided on the swinging drive and loosely arranged on the transmission shaft, a manually releasable coupling provided for switching off the impact mechanism and connecting the drive bearing with the transmission shaft for a rotation transmission, a crank-shaped flat switching plate provided for releasing the coupling and turnably supported on a receiving dome arranged above the transmission shaft, a drive pin operative for turning the switching plate under the receiving dome and engaging the switching plate, and a handle.

REFERENCES:
patent: 4719976 (1988-01-01), Bleicher et al.
patent: 4770254 (1988-09-01), Kominami
patent: 5379848 (1995-01-01), Rauser
patent: 6109364 (2000-08-01), Demuth et al.
patent: 6192996 (2001-02-01), Sakaguchi et al.
patent: 6460627 (2002-10-01), Below et al.
patent: 6789630 (2004-09-01), Quirijnen et al.
patent: 28 20 128 (1979-11-01), None

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