Electrically driven fastening appliance

Details Electrically driven fastening appliance Electrically driven fastening appliance

1978-07-05

1980-11-04

Jones, Jr., James L.

Tools

Wrench, screwdriver, or driver therefor

Responsive to torque on work

64 29, 192150, B25D 23142

Patent

active

042312701

ABSTRACT:
An electrically operated fastening appliance with an automatic controlling clutch mechanism by which on termination of the fastening operation the power transmission from the motor (13) to the driving spindle (36) is instantly discontinued to prevent application of the excessive torque to the screw-threaded connecting means to be tightened and transmission of undesired reversing torque.
The automatic controlling clutch mechanism includes a central gear (40) secured to a drive shaft (38) derived from the motor (13), planetary gears (30) supported on a planet carrier (32) and an annulus member (29) with an internal gear (28) accommodated turnably in a cylindrical casing (14) and clutch elements interposed between the annulus member (29) and the casing (14).

REFERENCES:
patent: 2209155 (1940-07-01), Fagg
patent: 3277670 (1966-10-01), Bent
patent: 3319494 (1967-05-01), Ulbing
patent: 3906819 (1975-09-01), Curtis
patent: 3942398 (1976-03-01), Fletcher et al.

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