Multiple-ratio automatic transmission with releasable hyperboloi

Details Multiple-ratio automatic transmission with releasable hyperboloi Multiple-ratio automatic transmission with releasable hyperboloi

1991-12-23

1992-07-14

Lorence, Richard

Planetary gear transmission systems or components

With means to vary drive ratio or disconnect drive

Plural elements selectively braked

475278, 192 47, 192 4892, 192 12B, 188 823, 188 8284, F16H 146, F16D 4108

Patent

active

051298708

ABSTRACT:
An automatic transmission having multiple planetary gear elements adapted to establish and disestablish plural torque delivery paths between a driving member and a driven member, and releasable couplings adapted to connect selected gear elements of the transmission to ground and to connect two of the elements together to effect nonsynchronous ratio changes in the transmission without the necessity of engaging and releasing in timed sequence friction clutches and friction brakes, whereby friction torque losses are reduced and ratio changes in the transmission have a high degree of smoothness.

REFERENCES:
patent: 1670197 (1928-05-01), Humfrey
patent: 1929782 (1933-10-01), Hughes
patent: 2076635 (1937-04-01), Halstead
patent: 2113512 (1938-04-01), Kesterton
patent: 3557921 (1971-01-01), Takada
patent: 4123952 (1978-11-01), Wayman
patent: 4284183 (1981-08-01), Brisabois et al.
patent: 4805718 (1989-02-01), Iwata et al.
patent: 4978328 (1990-12-01), Pierce
patent: 5031746 (1991-07-01), Koivunen
patent: 5067601 (1991-11-01), Castens

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