Impact driver having a percussion application mechanism...

Details Impact driver having a percussion application mechanism... Impact driver having a percussion application mechanism...

2006-11-07

2006-11-07

Tawfik, Sameh H. (Department: 3721)

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

C173S104000, C173S093000, C173S093500, C173S216000, C173S112000, C173S206000, C173S109000

Reexamination Certificate

active

07131503

ABSTRACT:
An impact driver capable of boring and having an excellent usability is provided. An anvil(8) is arranged so as to slightly move in the axial direction. A first cam(29) having cam gears(30, 30. . . ) is externally provided at the anvil so as to be integral with the anvil(8). At the rear of the first cam(29), a second cam(31) having cam gears(32, 32. . . ) and further having cam gears(36, 36. . . ) at its outer circumference is externally provided to the anvil(8) so as to be rotatable. At the backward position of the anvil(8), the cam gears(30, 32) contacts with each other. On the other hand, in the cylindrical portion(27) of the hammer case(5), an engaging pin(37) capable of engaging with an engaging gear(36) of the second cam(31) is provided. The engaging pin(37) can change its location by the rotative operation of a mode-change ring(40), whereby a percussion mode and a non-percussion mode is selected.

REFERENCES:
patent: 4098351 (1978-07-01), Alessio
patent: 5458206 (1995-10-01), Bourner et al.
patent: 6015017 (2000-01-01), Lauterwald
patent: 6142242 (2000-11-01), Okumura et al.
patent: 6688406 (2004-02-01), Wu et al.
patent: 6892827 (2005-05-01), Toyama et al.
patent: 2005/0199404 (2005-09-01), Furuta et al.
patent: A 2002-273666 (2002-09-01), None

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