Toothed power transmission belt for use in oil
AssigneeThe Gates Corporation
InventorsKirstie Petherbridge, Paul Pearson
Life of this patent
Estimating the term…
Abstract
A toothed power transmission belt suitable for use in contact with oil, having an elastomeric belt body, a helical wound tensile member embedded therein, and teeth on a pulley-contact surface with a jacket covering the teeth, wherein the jacket is a woven fabric with a smooth, continuous, outer rubber layer formed from a nitrile-containing elastomer compounded with at least one coagent, an RFS adhesion promoter, and with no fluoropolymer, and the fabric has para-aramid fibers in the weft, meta-aramid fibers in the warp, and no nylon fibers.
Claims16
A toothed power transmission belt comprising:
- an elastomeric belt body with a helical wound tensile member embedded therein;
- and
- teeth on a pulley-contact surface with a jacket covering the teeth;
- said jacket comprising:
- a woven fabric, comprising no nylon fibers, with a first fabric treatment based on epoxy or epoxy-rubber, and then coated on the external side with an oil and heat resistant rubber composition defining a smooth, continuous, outer rubber layer, wherein the oil and heat resistant rubber composition comprises no fluoropolymer or fluoroelastomer component.
A jacket for a toothed belt for use in contact with oil comprising:
- a woven fabric consisting of para-aramid yarn and an elastic yarn in the weft and consisting of meta-aramid yarn in the warp, the elastic yarn not consisting of nylon;
- an epoxy or epoxy-rubber treatment on the fibers of said woven fabric;
- an adhesive rubber coating on one side of the epoxy-treated fabric, said one side intended for contact with the body of the toothed belt;
- a smooth, continuous rubber layer on the opposite side of the epoxy-treated fabric, said opposite side intended for contact with a pulley;
- said rubber layer comprising a heat-resistant and oil-resistant nitrile rubber composition with no fluoropolymer ingredient.
A method of making a toothed belt for use in contact with oil comprising:
- providing a woven fabric consisting of para-aramid yarn and an elastic yarn in the weft and consisting of meta-aramid yarn in the warp, the elastic yarn not consisting of nylon;
- applying an epoxy or epoxy-rubber treatment on the fibers of said woven fabric;
- applying an adhesive rubber coating on one side of the epoxy-treated fabric, said one side intended for contact with the body of the toothed belt;
- applying a heat-resistant and oil-resistant nitrile rubber composition with no fluoropolymer ingredient on the opposite side of the epoxy-treated fabric to form a jacket;
- and
- molding said belt with said jacket covering the teeth of said toothed belt, with said heat-resistant and oil-resistant nitrile rubber composition defining a glossy, smooth, continuous, outer rubber layer on the toothed surface intended for contact with a pulley.
Dependencies are inferred from the claim text.