Torque adjusting mechanism for power driven rotary tools

Details Torque adjusting mechanism for power driven rotary tools Torque adjusting mechanism for power driven rotary tools

1989-07-10

1991-01-22

Watts, Douglas D.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81467, B23Q 500

Patent

active

049863690

ABSTRACT:
A power driven rotary tool includes a tool housing and an electric motor mounted within the tool housing. A first clutch member is operatively connected to the electric motor. A spindle is rotatably mounted in the tool housing and has a tool bit removably secured to the front end thereof. A second clutch member is operatively connected to the spindle and is shiftable between a first position in which the second clutch member is in driving engagement with the first clutch member and a second position in which the second clutch member is in sliding engagement with the first clutch member. A biasing mechanism is provided for normally biasing the second clutch member into driving engagement with the first clutch member. A control mechanism is disposed in the tool housing for steplessly adjusting the biasing force of the biasing mechanism. A manually-adjustable operating mechanism is provided for operating the control mechanism from outside of the tool. A positioning mechanism is mounted on the tool housing for holding the control mechanism in an operative position adjusting the biasing force of the biasing mechanism.

REFERENCES:
patent: 4823885 (1989-04-01), Okumura

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