Drill adjustment mechanism for a hammer drill

Details Drill adjustment mechanism for a hammer drill Drill adjustment mechanism for a hammer drill

1993-12-27

1995-09-05

Seidel, Richard K.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

173 13, 173216, 173217, B23B 4502

Patent

active

054472059

ABSTRACT:
An adjusting mechanism for a hammer drill that will switch the drill from conventional drill only mode to a hammer drill mode by rotating an adjusting rod. The generally cylindrical adjusting rod includes an impact cam and an adjacent and smaller drill cam. One of the two cams will be in a position adjacent a thrust ball, which is on the back of the spindle. When the drill cam is rotated into position to contact the thrust ball, a clutch face on an output gear will be held in spaced relation to a clutch face on an impact bushing with a resulting drill only rotational motion of the spindle; when the impact cam is rotated into position adjacent the thrust ball, the two clutch faces will come into engagement with one another and create a hammer drill motion of the spindle.

REFERENCES:
patent: 3785443 (1974-01-01), Armbruster
patent: 3799275 (1974-03-01), Plattenhardt
patent: 3835715 (1974-09-01), Howell
patent: 4073348 (1978-02-01), Schramm et al.
patent: 4204580 (1980-05-01), Nalley
patent: 4223744 (1980-09-01), Lovingood
patent: 4232749 (1980-11-01), Rohrbach
patent: 4325436 (1982-04-01), Richter et al.
patent: 4418766 (1983-12-01), Grossman
patent: 4446931 (1984-05-01), Bleicher et al.
patent: 4798249 (1989-01-01), Hoereth et al.
patent: 5159986 (1992-11-01), Hoser

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