Torque release mechanism for an electronically powered tool

Details Torque release mechanism for an electronically powered tool Torque release mechanism for an electronically powered tool

1994-09-16

1995-05-30

Wright, Dirk

Interrelated power delivery controls, including engine control

Electric engine

With transmission control

477 8, 477178, F16D 43204

Patent

active

054197457

ABSTRACT:
Transmission between electric motor and tool shaft, for instance for hand tools such as an electric screwdriver and the like, which transmission is provided with an adjustable breaking coupling for discontinuing the drive torque on the tool shaft when a predetermined resistance moment on this tool shaft is exceeded, wherein the breaking coupling in the form of two mutually slidable parts is provided with a signal generator for controlling a member influencing the motor feed, which signal generator comes into operation as soon as the two parts slide relative to one another when the set torque is exceeded, so that a disengagement takes place between motor and tool shaft immediately after the desired resistance moment is exceeded, wherein the inertia of the rotating parts no longer has any effect on the tool shaft so that it stops immediately.

REFERENCES:
patent: 2825862 (1958-03-01), Price
patent: 2973066 (1961-02-01), Eddy, Jr.

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