Cog-belt & method for its production

Claim 2

An endless power transmission belt comprising: a. a body portion composed of an elastomeric material; b. a fibrous tensile layer disposed longitudinally within said body section and forming a bond therewith; c. a plurality of spaced teeth bonded with and disposed along the inner periphery of said body portion to form alternating teeth and land portions, the teeth containing loading material oriented substantially transversely to the direction of travel of the belt, and embedded within an elastomeric material; and d. a layer of wear resistant fabric positioned substantially along the periphery of said alternating land and teeth portions of the belt.

Claim 3

The transmission belt of claim 1 wherein said fibrous tensile layer is composed of a plurality of spaced strain resisting prestressed cords.

Claim 4

The transmission belt of claim 1 wherein the body portion has an outer peripheral portion carrying at least one power transmitting longitudinally extending element.

Claim 5

The transmission belt of claim 3 wherein the power transmitting elements consist of a plurality of closely spaced V-elements held together by a tie-band support provided by the body portion of the belt.

Claim 6

The transmission belt of claim 4 wherein the base of the V-elements formed at the intersection with the tie-band contain vertical flat portions, whereby engagement of the V-element portion of the belt with a cooperating sheave leaves a space between the sheave and tie-band.

Claim 7

The transmission belt of claim 1 wherein the transversely extending loading material consists of at least one reinforcing cord, the loading material substantially filling the vertical space between the fibrous tensile layer and the wear resistant fabric layer along the innermost portion of the teeth.

Claim 8

The transmission belt of claim 1 wherein the fabric layer consists of a woven highly extensible fabric.

Claim 9

The transmission belt of claim 7 wherein the fabric consists of polyamide fibers.

Claim 10

The transmission belt of claim 1 wherein the elastomeric materials forming said body portion and forming a portion of said teeth respectively, are formed of the same material.

Claim 11

The transmission belt of claim 9 wherein the elastomeric material is formed from a flowable rubber-like material.

Claim 12

The transmission belt of claim 10 wherein said rubber-like material is liquid castable polyurethane.

Claim 13

The transmission belt of claim 1 wherein the ratio of the height of an individual tooth, measured from the tensile member to the innermost portion of the tooth, to the distance between successive teeth, measured at their respective bases, is at least 1.0:1.

Claim 14

The transmission belt of claim 12 wherein said ratio is at least 1.4:1.

Claim 15

The transmission belt of claim 1 wherein the transversely oriented loading material fills a major proportion of the cross-section of said teeth.

Claim 16

The transmission belt of claim 1 wherein the transversely oriented loading material is in contact with said fibrous tensile layer thereby providing alignment support thereto.

Claim 17

The transmission belt of claim 1 wherein said teeth have an innermost face portion and wherein at least a portion of the transversely oriented loading material is in contact with said innermost face portion.

Claim 18

The transmission belt of claim 1 wherein substantially the entire longitudinal cross-section of the teeth accommodates said transversely oriented loading material.

Claim 19

The transmission belt of claim 1 wherein the transversely oriented loading material is in close proximity to said fibrous tensile layer thereby providing alignment support therefor.

Claim 20

The transmission belt of claim 1 wherein said teeth have an innermost face portion and wherein at least a portion of the transversely oriented loading material is in close proximity to said innermost face portion.

Claim 21

A cast polyurethane cog-type power transmission belt comprising: a polyurethane body section; a tensile section disposed longitudinally within said body section and forming a bond therewith; a plurality of spaced cogs integral with said body section and disposed along the inner periphery thereof to form alternating teeth and land portions, said teeth having an innermost face portion; loading material embedded within said teeth and oriented substantially transversely to the direction of travel of the belt; said loading material filling a major proportion of the cross-section of said teeth; and wear resistant fabric positioned along the inner periphery of said land and teeth portions including said innermost face portion of the teeth.

Claim 22

A cast polyurethane cog-type power transmission belt comprising: a polyurethane body section; a tensile section disposed longitudinally within said body section and forming a bond therewith; a plurality of spaced cogs integral with said body section and disposed along the inner periphery thereof to form alternating teeth and land portions, said teeth having an innermost face portion; loading material embedded within said teeth and oriented substantially transversely to the direction of travel of the belt; said loading material filling a major proportion of the cross-section of said teeth; and wear resistant fabric positioned along the inner periphery of said land and teeth portions including said innermost face portion of the teeth.

Claim 23

The belt of claim 20 wherein said tensile section comprises fibrous tensile members, said transversely oriented loading material contacting said fibrous tensile members to provide aligning support therefor.

Claim 24

The belt of claim 20 wherein at least a portion of the transversely oriented loading material is in contact with the innermost face portion of the teeth carrying said wear resistant fabric.

Claim 25

The belt of claim 20 wherein the transversely oriented loading material substantially fills the space extending between said tensile section and the wear resistant fabric positioned along the innermost face portion of the teeth.

Claim 26

The belt of claim 20 wherein said tensile section comprises fibrous tensile members, said transversely oriented loading material coming into close proximity to said fibrous tensile members to provide aligning support therefor.

Claim 27

The belt of claim 20 wherein at least a portion of the transversely oriented loading material is in close proximity to the innermost face portion of the teeth carrying said wear resistant fabric.