Abstract: A belt-type continuously variable transmission consisting of: an input/drive shaft with a rotational axis; an output/driven shaft with a rotational axis; a first variable speed pulley on the input/drive shaft and having a first pulley part fixed against axial movement relative to the input/drive shaft and a second pulley part movable axially relative to the first pulley part, with the first and second pulley parts cooperatively defining a belt-receiving groove; a second variable-speed pulley on the output/driven shaft and having a third pulley part fixed against axial movement relative to the output/driven shaft and a fourth pulley part movable axially relative to the third pulley part, with the third and fourth pulley parts cooperatively defining a belt-receiving groove; a fluid cylinder; structure for shifting the second pulley part axially relative to the first pulley part in response to a change in pressure in the fluid cylinder; a fluid reservoir on the first variable-speed pulley for rotation with the i

Abstract: A power transmission belt structure including a flexible neutral belt portion, a plurality of blocks secured to the flexible belt portion seriatim longitudinally thereof, and heat conducting structure disposed between the flexible belt and blocks for conducting away from the flexible belt heat generated as a result of power transmission operation of the belt structure. A number of different embodiments utilizing the heat conducting structure are disclosed. In certain of the embodiments, the heat conducting structure extends partially about the blocks and, in certain of the embodiments, the heat conducting structure extends fully thereabout. In certain embodiments, the reduced midportion of the block is provided with the heat conducting structure recessed therein. In one form, a protective outer coating is provided on the heat conducting structure.

Abstract: An apparatus and method for effectively minimizing sound emanation from a power transmission belt drive and providing extended useful life of the power transmission belt by reducing the operating temperature thereof. In the illustrated embodiment, the drive system is enclosed in a housing having one or more inlets and one or more outlets. Air moving structure is provided in association with the pulleys for causing air flow through the interior of the housing from the inlets to the outlets as an incident of operation of the drive system. In the illustrated embodiment, the pulleys are formed of heat conducting material so as to transfer heat from the belt to the air being flowed through the interior of the housing, thereby reducing the operating temperature of the belt.