The Gates Corporation

Shawn Xiang Wu

Min Gao

Lance C Hall

Masahiro Mori

Kevin Ward

Guogong Chen

Yuding Feng

Leslee Brown

Nigel Peter Blunsden

Clifford Walker

Andrzej Dec

Joseph R Duke, Jr

Xinjian Fan

Karla J Bier

Jennifer E Pease

Douglas D Schelhaas

Tae Hee Cheong

Cynthia Decker

Patrick Joseph McNamee

William Fraser Lacy

Charlie Ochoa

Cindy Decker

Carol Weber

John Muri

Cindy Cookson

Justin Paulsen

Joseph R Duke

Patrick Joseph Mcnamee

Paul Pearson

Schelhaas Douglas D,

Lance Hall

A toothed power transmission belt with a smooth back side surface has a back jacket on the back side surface; wherein the back jacket comprises a closed-mesh, knit fabric tube. The fabric tube may be knitted on a circular weft knitting machine and may be heat set after knitting. The fabric tube may be treated with an epoxy, RFL or other treatment to provide for oil resistance, adhesion, frictional properties, etc.

Toothed power transmission belt with back fabric

A synchronous belt drive system having: a synchronous belt with a tensile cord of high-modulus fiber such as glass, carbon, PBO, or aramid; a driver sprocket and at least one driven sprocket, at least one of which is an obround sprocket; and a tensioner having: a base having a cylindrical portion extending axially with a radially outer surface and a receiving portion, an eccentric arm pivotally engaged with the radially outer surface, a torsion spring disposed within the receiving portion, the torsion spring applying a biasing force to the eccentric arm, and a pulley journalled to the eccentric arm. Preferably, no one of the eccentric arm, pulley, or torsion spring is axially displaced along an axis A-A from the others. The obround sprocket has a toothed surface and at least one linear portion disposed between two arcuate portions having a constant radius, the linear portion having a predetermined length.

Synchronous belt drive system

A fabric for reinforcing a power transmission belt including fibers of polyarylene sulfide and a belt utilizing the fabric. The fabric may have textured or elastic core wrapped stretch yarns in the longitudinal direction. Longitudinal yarns may include PPS and textured transverse yarns include nylon. Yarns may include blends of high performance fibers and nylon or other fibers.

Fabric for toothed power transmission belt and belt

A cover fabric for a power transmission belt, the fabric woven from warp yarns and weft yarns; the warp yarns and weft yarns each plied from a first filament yarn and a second filament yarn; the first filament yarn comprising higher tensile strength fibers than the second filament yarn; and the fabric woven in a modified twill pattern. A toothed belt with the cover fabric on the teeth, oriented on a bias, with the fabric having a bias angle less than 90&#xb0;.

Bias tooth fabric and toothed power transmission belt

A belt having an elastomeric body, a tensile cord embedded therein, and a tooth fabric having an increased value of Fabric Tensile Toughness as defined herein. The Fabric Tensile Toughness may be derived from properties of the yarns making up the fabric, such as yarn linear density, yarn ultimate elongation, yarn tensile strength, yarn packing density and weave ratio. The Fabric Tensile Toughness may be greater than 60 mJ/mm. The belt may be a toothed belt of cast polyurethane with carbon fiber tensile cord. Also disclosed is a method of improving a known tooth cover fabric for a toothed power transmission belt involving selecting a different fabric having a higher Fabric Tensile Toughness than the known fabric and orienting the different fabric so the direction of highest Fabric Tensile Toughness is oriented in the longitudinal direction of the belt.

Synchronous belt with tough fabric

A V-ribbed belt that includes a ribbed surface covered with fabric is provided. The fabric is stretchable in two predetermined directions. A method for manufacturing the V-ribbed belt is also provided. The method includes placing a belt matrix about a mandrel, placing a fabric about the external circumference of the belt matrix which wraps around the mandrel, placing the mandrel inside a shell having a plurality of grooves on the internal circumference, expanding the belt matrix and the fabric toward the internal circumference of the shell and thus pressing the fabric onto the internal circumference having the multi-ribbed structure, and curing the belt matrix with the fabric. The fabric is stretchable to accommodate itself to the multi-ribbed structure.

V-ribbed belt and method for manufacturing same

A belt having a tensile cord embedded in the belt, extending in a longitudinal direction and made up of two components: a tensile component and a sacrificed component. The sacrificed component may be broken into a plurality of discontinuous segments. The tensile component provides most of the reinforcement of the belt. The sacrificial component of the precursor cord protects the tensile component from excessive stretching during cord treating and winding, but breaks, melts, or yields during mandrel expansion during the belt molding process, thus preserving the stretchability of the tensile component.

Two-component cord and method for molded power transmission belts

A power transmission belt comprising a polyester tensile cord having a heat shrinkage at 100&#xb0; C. of less than 1% and/or a heat shrinkage at 150&#xb0; 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&#xb0; 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.

Power transmission belt

A power transmission belt comprising a body comprising an elastomeric material and having tensile members running in a longitudinal direction, the body having a pulley engaging region having a profile; the pulley-engaging region comprising a fibrous nonwoven fabric material; characterized in that the fibers of the nonwoven material comprise acrylic fibers. The acrylic fibers are preferably micro-fibers of less than about 1.5 dpf and having an average diameter of 13.5 microns or less and an average length of about 1 to about 10 mm. The nonwoven material may be commingled with the elastomeric material in the pulley engaging region. Up to about 75% by weight of the fibers of the nonwoven material may comprise non-acrylic fibers such as other synthetic fibers, natural fibers, or cellulosic fibers.

A power transmission belt with an embedded load carrier cord having a plurality of yarns and possessing a first twist corresponding to a first twist multiplier and a first twist direction, and possessing a second twist corresponding to a second twist multiplier in the opposite direction, such that the ratio of the first twist multiplier to the second twist multiplier is greater than about 1.5, and at least one yarn includes fibers of polyketone or polyvinylalcohol.

Endless belt with improved load carrying cord

A power transmission belt with an embedded load carrier cord having a plurality of yarns and possessing a first twist corresponding to a first twist multiplier and a first twist direction, and possessing a second twist corresponding to a second twist multiplier in the opposite direction, such that the ratio of the first twist multiplier to the second twist multiplier is greater than about 1.5. The belt may be a multi-v-ribbed belt. The load carrying cord may have a plurality of twisted yarns having a first yarn twist and a second cord twist in a direction opposite the yarn twist and a ratio of yarn twist to cord twist from about 1.5:1 to about 4:1.

Growing community of inventors

Rochester Hills, MI, United States of America

Shawn Xiang Wu