Power transmission

Details Power transmission Power transmission

1989-06-02

1990-12-11

Braun, Leslie A.

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475280, 475303, 475330, F16H 5710

Patent

active

049766708

ABSTRACT:
A power transmission has a planetary gear arrangement controlled by a plurality of selectively engageable clutches and brakes to provide forward and reverse speed ratios. A selectively operable input gear arrangement is utilized to establish a negative ratio of substantially 1:1 between the transmission input and the planetary gear arrangement. The selective use of the negative ratio input permits substantially equal forward and reverse drive ratios. The negative ratio input arrangement also permits extended coverage when employed with some of the other forward ratios established by the planetary gear arrangement.

REFERENCES:
patent: 3705521 (1972-12-01), Smith
patent: 3820418 (1974-06-01), Ott
patent: 4046031 (1977-09-01), Ott et al.
patent: 4089239 (1978-05-01), Murakami et al.
patent: 4228697 (1980-10-01), Miller
patent: 4238888 (1977-08-01), Murakami et al.
patent: 4395925 (1983-08-01), Gaus
patent: 4653348 (1987-03-01), Hiraiwa
patent: 4660439 (1987-04-01), Hiraiwa
patent: 4674346 (1987-06-01), Hiraiwa
patent: 4744267 (1988-05-01), Lepelletier
patent: 4836041 (1989-06-01), Falzoni et al.

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