Drilling tool speed shifting unit

Details Drilling tool speed shifting unit Drilling tool speed shifting unit

1991-03-25

1992-05-12

Yost, Frank T.

Tool driving or impacting

Drive adjustable to completely change kind of drive

Adjustable to impacting device

173117, 74531, B23B 4502

Patent

active

051118890

ABSTRACT:
A drilling tool has a shifting unit including a rotatable shifting lever (6) with a shifting cam (9) for switching between different operating positions corresponding to different operating speeds. For holding the shifting lever (6) in the operating positions, a spring clip (14) is mounted on the lever and is rotatable relative to the tool housing. The spring clip has detents (14a, 14b) arranged to snap into recesses (1d, 1e) in a bolt-like part of the housing which rotationally supports the shifting lever (6).

REFERENCES:
patent: 3774699 (1973-11-01), Schmuck
patent: 3834468 (1974-09-01), Hettich et al.
patent: 3931744 (1976-01-01), Wunsch
patent: 4236588 (1980-12-01), Moldan et al.
patent: 4506743 (1985-03-01), Grossmann

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