Automatic variable transmission for power tool

Details Automatic variable transmission for power tool Automatic variable transmission for power tool

1996-09-05

1999-04-27

Ta, Khoi Q.

Planetary gear transmission systems or components

Condition responsive control

Overload release

475266, 475263, F16H 374, F16H 3510

Patent

active

058974547

ABSTRACT:
An automatic transmission (30) for a power tool includes reduction gearing (42-58) coupled between a motor (24) and an output member (28). A mechanism for adjusting speed (60) of the output member (28) is coupled with the reduction gearing (42-58). The mechanism for adjusting speed (60) is slidably biased such that upon change in torque, the mechanism for adjusting speed (60) moves which, in turn, engages and disengages the reduction gearing (42-58) to vary the speed of the output member (28) between a first and second speed.

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patent: 4869139 (1989-09-01), Gotman
patent: 4892013 (1990-01-01), Satoh
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