Key-shift transmission

Details Key-shift transmission Key-shift transmission

1986-12-10

1987-10-27

Braun, Leslie

Machine element or mechanism

Gearing

Interchangeably locked

192 4891, 192 76, F16H 308

Patent

active

047021209

ABSTRACT:
In a transmission comprising a plurality of freely rotatable gears on a change-speed shaft, shift keys slidably disposed within the shaft are supported by a shift collar pivotally but non-slidably by an engagement of the keys with the inner circumference of shift collar. The shift keys are biased to pivot for a selective gear-coupling operation by compression leaf springs disposed between an end face of the shift collar and base end projections of the shift keys.
The springs arranged outside the shaft will not require a particular design of the keys and contribute to prolong the life of shift keys. The support structure for shift keys by the shift collar as well as the arrangement of key-biasing springs will secure a compactness of the transmission.

REFERENCES:
patent: 841520 (1907-01-01), Herisson
patent: 1354956 (1920-10-01), Clarke
patent: 2375787 (1945-06-01), Hazard et al.
patent: 2395433 (1945-02-01), Sundt
patent: 3028763 (1962-04-01), Vetsch
patent: 3812735 (1974-05-01), Kaler et al.
patent: 4662241 (1987-05-01), Edwards

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