Continuously variable transmission belt and pulley arrangement
AssigneeManville Corporation
InventorThomas H. Sadler
Life of this patent
Estimating the term…
Abstract
A belt and pulley construction for use in a continuously variable power transmission arrangement. In one embodiment the conical working surfaces of the drive pulleys and the driven pulleys are comprised of removable segments formed of relatively erodable friction modifying material so that the conical pulley surfaces will wear away before the drive belt. In another embodiment the drive belt, whether comprised of a rubber compound or of metal, contains wear faces or pads which contain friction modifying material. Traction between the belt and the pulleys can thus be controlled by members other than solely through the tension of the drive belt.
Claims5
In a power transmission arrangement having a drive shaft, a pulley mounted on the drive shaft, a driven shaft, a pulley mounted on the driven shaft, and a drive belt trained over and operatively connecting the pulleys, the improvement comprising:
- the drive belt comprising wear surfaces which contact the pulleys;
- the wear surfaces including particles of friction modifying material which, as a result of its operative contact with the pulleys, will erode to a greater extent than the surface of the pulleys contact by the drive belt;
- and
- the drive belt including a continuous portion which is connected to the wear surfaces of the drive belt but which is not in contact with the pulleys, the continuous portion having a greater resistance to high tensile forces than the wear surfaces.
In a continuously variable power transmission arrangement having a drive shaft, a pulley on the driven shaft including two pulley halves mounted for relative axial movement toward and away from each other, a driven shaft, a pulley on the drive shaft including two pulley halves mounted for relative axial movement toward and away from each other, and a drive belt trained over and operatively connecting he pulleys, the drive belt including a continuous portion having a first wear surface which contacts the pulley halves and the pulley halves having a second wear surface which contacts the drive belt, the improvement comprising:
- the first wear surface being comprised of a composition including friction modifying material which will erode to a greater extent than the second wear surface as a result of its operative contact with the second wear surface.
Dependencies are inferred from the claim text.