Transmission

Details Transmission Transmission

1976-12-23

1978-03-07

Scott, Samuel

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74761, F16H 5710

Patent

active

040772829

ABSTRACT:
A planetary transmission for selectively shifting among three forward and one reverse speeds includes first and second sun gears respectively secured to and clutchable to a drive shaft to provide a first forward speed. A planet carrier, secured to a driven shaft, surrounds the sun gears and carries a first planet gear meshing with the first sun gear and a compound planet gear comprising a second planet gear meshing with the first planet gear and a third planet gear meshing with the second sun gear. Respectively concentric with the first and second sun gears are brake-associated first and second ring gears which respectively mesh with the first and third planet gears. First, second, and third brakes are respectively connected to the first ring gear, the second ring gear, and the first sun gear to stop and allow rotation of said gears to provide two forward and one reverse speeds; a third forward speed is provided by clutching the second sun gear to the drive shaft.

REFERENCES:
patent: 1217059 (1917-02-01), Pollard
patent: 2220174 (1940-11-01), Ravigneaux
patent: 2598179 (1952-05-01), Kelbel
patent: 2657592 (1953-11-01), Burnett
patent: 2689490 (1954-09-01), Holdeman
patent: 2770151 (1956-11-01), Cartwright et al.
patent: 2901923 (1959-09-01), Waclawek
patent: 3721135 (1973-03-01), Kelley

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