Variable speed ratio drive

Details Variable speed ratio drive Variable speed ratio drive

1984-03-27

1986-08-26

Leppink, James A.

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 902

Patent

active

046080341

ABSTRACT:
In an automatic variable speed transmission, expansible pulleys function to change the speed ratio between driving and driven shafts. The pulleys are constructed in segments or arms that are pivoted at one end to swing outwardly. Each arm includes a V-shaped groove for receiving a V-belt. At a minimum diameter, the arms form a composite solid body and at a maximum diameter, when each arm is fully extended, a segmented pulley is formed. Automatic speed ratio change is disclosed in both the forward and reverse direction of rotation by proper combination of the pulleys.

REFERENCES:
patent: 616630 (1898-12-01), Pratt
patent: 672962 (1901-04-01), Seymour
patent: 698854 (1902-04-01), Pratt
patent: 2004224 (1935-06-01), Silber
patent: 3661024 (1972-05-01), Cooke
patent: 3935751 (1976-02-01), Lee
patent: 3956944 (1976-05-01), Tompkins
patent: 3969948 (1976-07-01), Pipenhagen, Jr.
patent: 3995508 (1976-12-01), Newell
patent: 4259874 (1981-04-01), Guirriee
patent: 4325702 (1982-04-01), Jacobsson et al.
patent: 4373926 (1983-02-01), Fullerton

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