Expansible chainwheel variable ratio mechanical drive

Details Expansible chainwheel variable ratio mechanical drive Expansible chainwheel variable ratio mechanical drive

1984-10-24

1988-07-26

Petrakes, John

Endless belt power transmission systems or components

Pulley with expansible rim means or pulleys with alternately...

Structure for variably adjusting radius of rim section

474 50, 474 56, F16H 5554, F16H 900, F16H 1106, F16H 5530

Patent

active

047597399

ABSTRACT:
A variable ratio transmission includes an input and an output, having an expansible chainwheel. A first drive path is provided to rotate the chainwheel and a second drive path is provided to increase the diameter of the chainwheel upon application of a first input torque and to decrease the diameter of the chainwheel upon application of a second input torque of opposite sense to the first input torque. The first and second drive paths are connected to the input so that the second drive path has a mechanical advantage over the first to provide an increase in diameter of the chainwheel prior to its rotation.

REFERENCES:
patent: 1692091 (1928-11-01), Murray
patent: 1776339 (1930-09-01), Siqueland
patent: 3850044 (1974-11-01), Hagen
patent: 3850045 (1974-11-01), Hagen
patent: 3867851 (1975-02-01), Gregory et al.
patent: 4068539 (1978-01-01), Nyc
patent: 4478594 (1984-10-01), Gayer
patent: 4501574 (1985-02-01), Miro
patent: 4516960 (1985-05-01), Rathert
patent: 4529394 (1985-07-01), Miro

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