Rotary differential drive

Details Rotary differential drive Rotary differential drive

1989-09-28

1991-10-08

Herrmann, Allan D.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475 5, 475 16, 475269, 475296, F16H 5710

Patent

active

050550977

ABSTRACT:
An electro-mechanical rotary drive providing by electrical switching an output shaft speed change by substantially equal small steps. The drive includes an epicyclic differential transmission, with two or more members coupled individually to constant speed a.c. motor(s) all driving through a simple externally power transmitting member which has a base speed or speeds attributable to each coupled member, and an actual speed having combinations of its base speeds for forward, reverse, and zero speed operation of the coupled members.

REFERENCES:
patent: 1774831 (1930-09-01), Henin
patent: 2330397 (1943-09-01), Trofimov
patent: 2436936 (1948-03-01), Page
patent: 2546869 (1948-10-01), Przybylski
patent: 2578837 (1951-12-01), Raney
patent: 3468191 (1969-09-01), Crook
patent: 4233858 (1980-11-01), Rowlett

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