Electric nutrunner

Details Electric nutrunner Electric nutrunner

1978-12-07

1980-07-01

Smith, Jr., David

Electricity: motive power systems

Automatic and/or with time-delay means

Terminal voltage or counter-electromotive force of...

318432, 318368, 318434, H02P 300

Patent

active

042108527

ABSTRACT:
An electric nutrunner for tightening bolt joints to a desired tightening torque. The nutrunner utilizes a motor having a low moment of inertia and a control device that supplies a pulse to the motor as an indication that the nut-tightening is to be terminated, thereby braking the motor electrically.

REFERENCES:
patent: 2600549 (1952-06-01), Ledbetter
patent: 3331004 (1967-07-01), Brown
patent: 3463991 (1969-08-01), Yuminaka
patent: 3477007 (1969-11-01), Ducommun et al.
patent: 3501684 (1970-03-01), Webb
patent: 3571683 (1971-03-01), Prezzi et al.
patent: 3845373 (1974-10-01), Totsu et al.
patent: 3892146 (1975-07-01), Yasoshima

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