.~ With condition responsive means to vary contact pressure
DEFINITION
Classification: 476/37
With condition responsive means to vary contact pressure:
(under subclass 36) Subject matter including means to sense a condition or change of condition in the environment of said friction gear transmission; and, in response to such sensing, said means act to increase pressure of frictional contact between said rotary motion transmitting parts. [figure] [caption] This application discloses a variable speed transmission of the type comprising an input shaft having an input disk connected thereto, an output disk, a plurality of traction drive balls confined between the input and the output disks, a separate output shaft not connected directly to the output disk and journaled in a stationary support, the output disk having a circular series of alternate, connected oppositely inclined surfaces formed on the side thereof opposite the traction balls, a flat-faced disk disposed adjacent the side of the output disk having the inclined surfaces, a plurality of rolling traction elements confined between the output disk and the flat-faced disk, a thrust bearing and a preload spring disposed between the support and the adjacent side of the flat-faced disk, the spring providing the only axial load on the elements of the transmission from the flat-faced disk to the input disk, the inclined surfaces and their associated rolling traction elements automatically increasing the load as torque transmitted to the output disk increases, and vice versa, the flat-faced disk and the output shaft being drivingly connected by axially resilient means permitting limited axial movement of the flat-faced disk so that the rolling traction elements may move along said inclined surfaces, without applying an appreciable load on the output shaft, thereby permitting the output disk to rotate with respect to the flat-faced disk to provide output overload protection.
SEE OR SEARCH THIS CLASS, SUBCLASS:
9+, for condition responsive fluid control to increase contact pressure; and subclasses 41, 48, and 61+ for other transmissions having condition responsive pressure variation.
