Hand held power tool with safety coupling

Details Hand held power tool with safety coupling Hand held power tool with safety coupling

1991-12-12

1993-04-13

Watts, Douglas D.

Tool driving or impacting

Impacting devices

With means for rotating tool

173178, B23Q 504

Patent

active

052013731

ABSTRACT:
A hand held power tool, particularly a hammer drill has a housing, a drive shaft, a rotatable tool holder, a safety coupling provided between the drive shaft and the tool holder, and a switching member supported with a bearing axis extending substantially parallel to the drive shaft and freely movable about the bearing axis in a plane extending substantially perpendicularly to the drive shaft. The switching member during a rearward rotation of the housing about an axis of the tool holder engages in the safety coupling and releasing the safety coupling.

REFERENCES:
patent: 3741313 (1973-06-01), States
patent: 4448261 (1984-05-01), Kousek et al.
patent: 4732217 (1988-03-01), Bleicher et al.

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