Rotary electric tool

Details Rotary electric tool Rotary electric tool

1988-07-05

1990-02-06

Yost, Frank T.

Tool driving or impacting

Automatic control of power operated means

Tool advance causing or controlling means

173163, 81469, 81473, 475153, 475263, 475266, 475299, B23Q 512, B25B 23151

Patent

active

048982490

ABSTRACT:
A rotary electric tool in which a differential gear mechanism is mounted within a gear case fixed to a housing for example; projections are formed on the outer peripheral surface of an internal gear of a final planetary gear mechanism in the differential gear mechanism, the said projections being brought into engagement with a projection-formed surface of a torque adjusting cam; the internal gear and the torque adjusting cam can be changed in relative position axially by reaction force of the internal gear; and the rotation of an output shaft is changed over between high and low speed conditions according to an axial displacement of the internal gear.

REFERENCES:
patent: 2936662 (1960-05-01), Apicelli
patent: 3187860 (1965-06-01), Simmons
patent: 3610343 (1971-10-01), Bratt
patent: 3739659 (1973-06-01), Workman, Jr.
patent: 3845673 (1974-11-01), Karden et al.
patent: 4173059 (1979-11-01), Hashimoto et al.
patent: 4215594 (1980-08-01), Workman, Jr. et al.
patent: 4487270 (1984-12-01), Huber
patent: 4617843 (1986-10-01), Nishida et al.

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