Power transmission belt
AssigneeThe Gates Corporation
InventorShawn Xiang Wu
Life of this patent
Estimating the term…
Abstract
A power transmission belt comprising a polyester tensile cord having a heat shrinkage at 100° C. of less than 1% and/or a heat shrinkage at 150° C. of less than about 1.5% and/or a dimensional stability index of less than about 6%. The belt has a heat shrinkage after 24 hours at 100° C. of less than 1%. The polyester may be that sold under the trade name A360 or A363 by Performance Fibers, Inc. or equivalent polyethylene terephthalate. The tensile cord is particularly suited for use in V-belts for variable speed drives.
Claims7
A power transmission belt comprising a tensile cord comprising polyester;
- the cord characterized by at least one of a heat shrinkage at 100° C. of less than 1%, a heat shrinkage at 150° C. of less than about 1.5%, and a Dimensional Stability Index of less than about 6%;
- and the belt characterized by a heat shrinkage after 24 hours at 100° C. of less than 1%;
- with said Index calculated as the sum of percent elongation at 4.5 g/d tensile load and percent heat shrinkage in air at 177° C.
A variable speed belt drive comprising a sheave and a belt;
- the belt comprising a tensile cord of polyester;
- the cord characterized by at least one of a heat shrinkage at 100° C. of less than 1%, a heat shrinkage at 150° C. of less than about 1.5%, and a Dimensional Stability Index of less than about 6%;
- and the belt characterized by a heat shrinkage after 24 hours at 100° C. of less than 1%;
- with said Index calculated as the sum of percent elongation at 4.5 g/d tensile load and percent heat shrinkage in air at 177° C.
Dependencies are inferred from the claim text.