Endless power transmission belt

Claim 2

An endless power transmission belt comprising, a tension section, a compression section, and a load-carrying section arranged between said tension and compression sections, said load-carrying section having a longitudinally extending loadcarrying cord, a first plurality of parallel cords arranged in skewed relation relative to and on one side of said longitudinally extending cord, and a second plurality of parallel cords arranged in skewed relation relative to and on the other side of said longitudinally extending cord, said skewed cords cooperating with said longitudinally extending cord to provide said belt having tensile strength and torsional stiffness as well as flexibility.

Claim 3

A belt as set forth in claim 1 in which said skewed cords on said one side of said longitudinally extending cord are arranged at an angle between 10* and 25* of said longitudinally extending cord and said skewed cords on said other side of said longitudinally extending cord are arranged at a similar angle but in an oppositely extending direction.

Claim 4

A belt as set forth in claim 1 in which said skewed cords comprise strength cords of a cord fabric and said strength cords are held in said parallel relation by comparatively weak tie strands.

Claim 5

A belt as set forth in claim 1 having a trapezoidal cross-sectional configuration and in which said tension and compression sections are each made of an elastomeric material.

Claim 6

An endless power transmission belt comprising, a tension section, a compression section, and a load-carrying section arranged between said tension and compression sections, said load-carrying section comprising a longitudinally extending load-carrying cord and a layer of cords on each side of said longitudinally extending cord, each of said layers having a plurality of parallel cords arranged in skewed relation relative to said longitudinally extending cord, said skewed cords cooperating with said longitudinally extending cord to increase the tensile strength and torsional stiffness of said belt yet said skewed cords being adapted to elongate and compress sufficiently to keep shear flow between the skewed cords and the longitudinally extending cord at a minimum and thereby assure said belt has the desired flexibility.

Claim 7

An endless power transmission belt comprising, a tension section, a compression section, and a load-carrying section arranged between said tension and compression sections, said load-carrying section comprising a longitudinally extending load-carrying cord and a layer of cords on each side of said longitudinally extending cord, each of said layers having a plurality of parallel cords arranged in skewed relation relative to said longitudinally extending cord, said skewed cords cooperating with said longitudinally extending cord to increase the tensile strength and torsional stiffness of said belt yet said skewed cords being adapted to elongate and compress sufficiently to keep shear flow between the skewed cords and the longitudinally extending cord at a minimum and thereby assure said belt has the desired flexibility.

Claim 8

A belt as set forth in claim 5 having a substantially trapezoidal cross-sectional configuration defined by a top wall and a bottom wall arranged in parallel relation and wherein each of said layers of cords is arranged parallel to said bottom and top walls.

Claim 9

A belt as set forth in claim 6 in which sAid longitudinally extending cord is a spirally wound cord arranged in another layer substantially midway between said previously mentioned layers.

Claim 10

A belt as set forth in claim 6 in which said tension and compression sections are each made of an elastomeric material.

Claim 11

A belt as set forth in claim 6 in which the skewed cords in each of said layers are arranged at an angle ranging between 10* and 25* relative to said longitudinally extending cord.

Claim 12

A belt as set forth in claim 6 in which the skewed cords in one of said layers are arranged at angle of 10* to 25* of said longitudinally extending cord and the skewed cords in the other layer are arranged at a similar angle but in an oppositely extending direction whereby said skewed cords in each layer extend in a symmetrical pattern on opposite sides of said longitudinally extending cord to thereby balance said belt.

Claim 13

A belt as set forth in claim 10 and further comprising additional means holding the skewed cords in each layer substantially parallel.

Claim 14

A belt as set forth in claim 11 in which said means holding the skewed cords in each layer parallel are in the form of weak tie strands.

Claim 15

A belt as set forth in claim 12 in which said skewed cords and weak tie strands of each layer define an associated cord fabric.