Variable ratio drive

Details Variable ratio drive Variable ratio drive

1985-02-20

1985-12-10

Novosad, Stephen J.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Speed responsive

474 28, F16H 1106

Patent

active

045577056

ABSTRACT:
A variable diameter sheave including a hydraulic chamber for controlling the spacing of the side plates of the sheave. A control valve is employed to control the hydraulic cylinder and is itself responsive to an input mechanism and a feedback mechanism. The input mechanism employed is a centrifugal weight responsive to the speed of rotation of the sheave. Feedback is provided by a rigid link sensing the effective diameter of the sheave. Two valve elements are employed in the control valve which are responsive to the input mechanism and the feedback mechanism to effect proper positioning of the sheave as a function of input speed.

REFERENCES:
patent: 2731849 (1956-01-01), Rockwood et al.
patent: 3659470 (1972-05-01), Beaudoin
patent: 4228691 (1980-10-01), Smirl

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