Endless power transmission belt

Claim 2

An endless power transmission belt comprising, a tension section, a compression section, a longitudinally extending loadcarrying cord arranged between said sections, a plurality of cords arranged in parallel relation transverse to and on at least one side of said load-carrying cord, and means holding said transverse cords parallel yet allowing free flexing movements of said belt in a direction perpendicular to said transverse cords, said transverse cords being arranged at an angle ranging between 45* and 80* to said load-carrying cord and providing crosswise rigidity and side edge support enabling said belt to be operated under tension.

Claim 3

A belt as set forth in claim 1 in which said transverse cords are in said compression section.

Claim 4

A belt as set forth in claim 1 and further comprising a plurality of closely spaced cords arranged in parallel relation on the other side of said load-carrying cord and transverse thereto said plurality of cords on said one side being in said compression section and said plurality of cords on said other side being in said tension section.

Claim 5

A belt as set forth in claim 1 in which said transverse cords comprise strength cords of a cord fabric and said means holding said strength cords parallel is in the form of weak tie strands of said cord fabric.

Claim 6

A belt as set forth in claim 4 having a trapezoidal cross-sectional configuration and wherein said tension and compression sections arE each made of an elastomeric material.

Claim 7

A belt as set forth in claim 4 in which said load-carrying cord is a spirally wound load-carrying cord and each of said plurality of transverse cords is arranged in an associated layer which is parallel to the parallel sides of said trapezoidal belt.

Claim 8

An endless power transmission belt comprising a tension section, a compression section, a spirally wound load-carrying cord arranged between said tension and compression sections and extending substantially longitudinally through said belt, a pair of layers on opposite sides of said load-carrying cord, one of said layers being in said tension section and the other being in said compression section, each of said layers comprising a plurality of supporting cords arranged in parallel relation transverse to said load-carrying cord; said transverse cords in said tension section being arranged at a particular angle to one side of said load-carrying cord and said transverse cords in said compression section being arranged at the same particular angle to the other side of said load-carrying cord, so that the supporting cords extend in a symmetrical pattern on opposite sides of said load-carrying cord to thereby provide crosswise rigidity as well as balance for said belt; and means holding the transverse cords in each layer parallel yet allowing free flexing movements of said belt in a direction perpendicular to the transverse cords of associated layers.

Claim 9

An endless power transmission belt comprising a tension section, a compression section, a spirally wound load-carrying cord arranged between said tension and compression sections and extending substantially longitudinally through said belt, a pair of layers on opposite sides of said load-carrying cord, one of said layers being in said tension section and the other being in said compression section, each of said layers comprising a plurality of supporting cords arranged in parallel relation transverse to said load-carrying cord; said transverse cords in said tension section being arranged at a particular angle to one side of said load-carrying cord and said transverse cords in said compression section being arranged at the same particular angle to the other side of said load-carrying cord, so that the supporting cords extend in a symmetrical pattern on opposite sides of said load-carrying cord to thereby provide crosswise rigidity as well as balance for said belt; and means holding the transverse cords in each layer parallel yet allowing free flexing movements of said belt in a direction perpendicular to the transverse cords of associated layers.

Claim 10

A belt as set forth in claim 7 having a substantially trapezoidal cross-sectional configuration and in which said tension and compression sections are each made of an elastomeric material.

Claim 11

A belt as set forth in claim 7 in which said particular angle at which each of said transverse cords is arranged ranges between 45* and 80*.

Claim 12

A belt as set forth in claim 9 in which said layer of cords in said tension section and said layer of cords in said compression section in each instance is defined by a cord fabric having strength cords which define said transverse cords.

Claim 13

A belt as set forth in claim 10 in which said means holding said transverse cords in each layer parallel comprise associated weak tie strands of the cord fabric.

Claim 14

A belt as set forth in claim 11 in which said belt is a raw edge belt free of a cover.

Claim 15

A belt as set forth in claim 11 in which each of said transverse cords has a rigidity which is approximately equal to the rigidity of the load-carrying cord.

Claim 16

An endless power transmission belt adapted to be operated in associated pulleys each having side flanges, said belt comprising a tension section, a compression section, a spirally wound load-carrying cord having a plurality of cord windings arranged in a layer between said tension and compression sections and extending substantially longitudinally through said belt, a plurality of cords arranged in parallel relation in a layer in said tension section and transverse said load-carrying cord, a plurality of cords arranged in parallel relation in a layer in said compression section and transverse to said load-carrying cord, and means holding the transverse cords in each layer parallel yet allowing free flexing movements of said belt in a direction perpendicular to the transverse cords of each layer, said transverse cords assuring that as each point of said belt engages and disengages the side flanges of each of said associated pulleys substantially the same loading is maintained on the cord windings of said load-carrying cord arranged at opposite sides of said belt.

Claim 17

An endless power transmission belt adapted to be operated in associated pulleys each having side flanges, said belt comprising a tension section, a compression section, a spirally wound load-carrying cord having a plurality of cord windings arranged in a layer between said tension and compression sections and extending substantially longitudinally through said belt, a plurality of cords arranged in parallel relation in a layer in said tension section and transverse said load-carrying cord, a plurality of cords arranged in parallel relation in a layer in said compression section and transverse to said load-carrying cord, and means holding the transverse cords in each layer parallel yet allowing free flexing movements of said belt in a direction perpendicular to the transverse cords of each layer, said transverse cords assuring that as each point of said belt engages and disengages the side flanges of each of said associated pulleys substantially the same loading is maintained on the cord windings of said load-carrying cord arranged at opposite sides of said belt.

Claim 18

A belt as set forth in claim 14 in which said transverse cords in said tension section are arranged at a particular angle to one side of said load-carrying cord and said transverse cords in said compression section are arranged at the same particular angle to the other side of said load-carrying cord, so that said supporting cords extend in a symmetrical pattern on opposite sides of said load-carrying cord to thereby provide crosswise rigidity as well as balaNce for said belt.

Claim 19

A belt as set forth in claim 15 in which said particular angle at which each of said transverse cords is arranged ranges between 45* and 80*.

Claim 20

A belt as set forth in claim 16 in which said layer of cords in said tension section and said layer of cords in said compression section in each instance is defined by a cord fabric having strength cords which define said transverse cords, and each of said transverse cords has a rigidity which is approximately equal to the rigidity of the load-carrying cord.