Electric drill with speed and torque control

Details Electric drill with speed and torque control Electric drill with speed and torque control

1990-07-02

1991-04-02

Phan, Hien H.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

81473, 464 35, B23Q 500, F16D 706

Patent

active

050040545

ABSTRACT:
This invention relates to an electric drill with speed and torque control and in particular to one which utilizes a single adjuster ring to control output speed and torque. When the adjuster ring is turned, the transmission axle will engage with another gear thereby changing the output speed. Further, in the meantime, the force exerted on the driven gear will be changed to adjust the output torque. The clutch and the driven gear are engaged by means of steel balls received in the recesses thereof.

REFERENCES:
patent: 4671364 (1987-06-01), Fink et al.
patent: 4823885 (1989-04-01), Okumura
patent: 4880064 (1989-11-01), Willoughby et al.

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