Torque impulse delivering power tool

Details Torque impulse delivering power tool Torque impulse delivering power tool

1991-02-01

1992-01-21

Watts, Douglas D.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81470, B25B 2314

Patent

active

050820664

ABSTRACT:
A torque impulse delivering power tool having an automatic power shut-off (28) and comprises a drive unit (15) including a rotor (16), a power supply (24) connected to the drive unit (15), a power controller (23) included in the power supply (24), an output shaft (20), and a hydraulic impulse clutch (19) coupling intermittently the drive unit (15) to the output shaft (20), which impulse clutch (19) comprises a drive member (18) drivingly connected to the drive unit rotor (16). A retardation responsive trip device (28) includes an inertia influenced activation member (29) which is mounted on a pivot pin (30) on the drive member (18) for movement about an axis substantially parallel to the rotation axis of the drive member (18) and which is arranged to activate a latch (40-44) by which the power controller (23) is shiftable from an open position to a closed position as a certain retardation magnitude is reached in the drive member (18).

REFERENCES:
patent: 4071092 (1978-01-01), Wallace
patent: 4307784 (1981-12-01), Smith
patent: 4418764 (1983-12-01), Mizobe

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