Locking device of power hand tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 15, 2002
Grant Date -
N/A
app pub date -
May 22, 2000
filing date -
May 22, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A locking device is provided between a gear train and an output shaft of a power hand tool. Pawls are arranged in a central bore of a fixed ring with an outer face thereof opposing an inner circumference of the central bore with a tiny gap therebetween. A coupler drivingly engages the shaft and the retention rings whereby when the coupler is rotated by the gear train, the coupler drives the disk and the pawls simultaneously and thus allowing the shaft to be rotated without constraint. When a user manually rotates the output shaft, the disk is rotated while the pawls are prevented from rotation about the first axis which causes a rotation of each pawl about the second axis leading to an interference between the outer face thereof and the inner circumference of the fixed ring thereby preventing the shaft from being further rotated.
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