US4169393A — Endless power transmission belt, method of making…

Claim 1

Independent Claim 97 words

An endless power transmission belt comprising, a portion having a plurality of spaced belt elements defined by alternating projections and recesses, each of said elements having an outer part and a root, and a triaxial fabric bonded against said elements and defining an abrasion-resistant exposed surface of said elements, said triaxial fabric also minimizing shearing stresses in each element due to improved tear resistance thereof, said triaxial fabric being defined by three angularly displaced sets of parallel courses of yarn interwoven to prevent slippage of at least one yarn course set along any other yarn course set.

Claim 2

Dependent Claim 97 words

An endless power transmission belt comprising, a portion having a plurality of spaced belt elements defined by alternating projections and recesses, each of said elements having an outer part and a root, and a triaxial fabric bonded against said elements and defining an abrasion-resistant exposed surface of said elements, said triaxial fabric also minimizing shearing stresses in each element due to improved tear resistance thereof, said triaxial fabric being defined by three angularly displaced sets of parallel courses of yarn interwoven to prevent slippage of at least one yarn course set along any other yarn course set.

Claim 3

Dependent Claim 35 words

A belt as set forth in claim 1 in which said triaxial fabric is disposed against said elements independently of any particular orientation of its yarn courses relative to the longitudinal axis of said belt.

Claim 4

Dependent Claim 26 words

A belt as set forth in claim 1 and further comprising a compression section, said spaced belt elements defining the outer portion of said compression section.

Claim 5

Dependent Claim 26 words

A belt as set forth in claim 3 and further comprising a load-carrying section adjoining said compression section at a location remote from said outer portion.

Claim 6

Dependent Claim 21 words

A belt as set forth in claim 4 in which each element extends longitudinally of the endless path of said belt.

Claim 7

Dependent Claim 26 words

A belt as set forth in claim 5 in which each element has a substantially V-shaped cross-sectional configuration and is in the form of a rib.

Claim 8

Dependent Claim 30 words

A belt as set forth in claim 4 and further comprising a tension section adjoining said load-carrying section, said fabric also bonded against the outermost surface of said tension section.

Claim 9

Dependent Claim 22 words

A belt as set forth in claim 7 in which said fabric is bonded against the entire outer surface of said belt.

Claim 10

Dependent Claim 20 words

A belt as set forth in claim 1 in which each element extends transverse the longitudinal axis of said belt.

Claim 11

Dependent Claim 35 words

A belt as set forth in claim 1 in which each element is in the form of a tooth which extends perpendicular to the longitudinal axis of said belt and extends completely across said belt.

Claim 12

Dependent Claim 125 words

An endless power transmission belt comprising, a tension section, a compression section, a load-carrying section bonded between said tension and compression sections, said compression section having a plurality of spaced belt elements defined by alternating projections and recesses, each of said belt elements having an outer part and a root which is integral with adjoining parts of said compression section, and a triaxial fabric bonded against said elements and defining an abrasion-resistant inside surface of said belt, said triaxial fabric also minimizing shearing stresses in each element due to improved tear resistance thereof, said triaxial fabric being defined by three angularly displaced sets of parallel courses of yarn interwoven to prevent slippage of at least one yarn course set along any other yarn course set.

Claim 13

Dependent Claim 125 words

An endless power transmission belt comprising, a tension section, a compression section, a load-carrying section bonded between said tension and compression sections, said compression section having a plurality of spaced belt elements defined by alternating projections and recesses, each of said belt elements having an outer part and a root which is integral with adjoining parts of said compression section, and a triaxial fabric bonded against said elements and defining an abrasion-resistant inside surface of said belt, said triaxial fabric also minimizing shearing stresses in each element due to improved tear resistance thereof, said triaxial fabric being defined by three angularly displaced sets of parallel courses of yarn interwoven to prevent slippage of at least one yarn course set along any other yarn course set.

Claim 14

Dependent Claim 36 words

A belt as set forth in claim 11 in which said triaxial fabric is disposed against said elements independently of any particular orientation of its individual yarn courses relative to the longitudinal axis of said belt.

Claim 15

Dependent Claim 17 words

A belt as set forth in claim 12 in which each element extends in an endless path.

Claim 16

Dependent Claim 26 words

A belt as set forth in claim 13 in which each element has a substantially V-shaped cross-sectional configuration and is in the form of a rib.

Claim 17

Dependent Claim 20 words

A belt as set forth in claim 13 in which each element extends transverse the longitudinal axis of said belt.

Claim 18

Dependent Claim 19 words

A belt as set forth in claim 15 in which each element is in the form of a tooth.

Claim 19

Dependent Claim 23 words

A belt as set forth in claim 11 in which said fabric is also bonded against the outermost surface of said tension section.

Claim 20

Dependent Claim 22 words

A belt as set forth in claim 11 in which said fabric is bonded against the entire outer surface of said belt.

Claim 21

Dependent Claim 94 words

In an endless power transmission belt having a compression section provided with load-transmitting teeth defined by alternating projections and recesses and a fabric bonded against and defining the outer portions of said teeth, the improvement wherein said fabric comprises a triaxial fabric having a plurality of three sets of yarn courses in which one of said three sets is substantially protected by the two other yarn sets, said one yarn set providing reinforcement of said teeth after substantial wear of said two other yarn sets resulting in an increased service life for said belt.

Claim 22

Dependent Claim 94 words

In an endless power transmission belt having a compression section provided with load-transmitting teeth defined by alternating projections and recesses and a fabric bonded against and defining the outer portions of said teeth, the improvement wherein said fabric comprises a triaxial fabric having a plurality of three sets of yarn courses in which one of said three sets is substantially protected by the two other yarn sets, said one yarn set providing reinforcement of said teeth after substantial wear of said two other yarn sets resulting in an increased service life for said belt.

Claim 23

Dependent Claim 44 words

In a belt as set forth in claim 19 the further improvement wherein each of said sets of yarn courses is comprised of a plurality of spaced parallel yarns and each yarn of each set is defined by a plurality of side-by-side yarn strands.

Claim 24

Dependent Claim 29 words

In a belt as set forth in claim 20 the further improvement wherein each of said spaced parallel yarns of each set is defined by two side-by-side yarn strands.

Claim 25

Dependent Claim 79 words

In a belt as set forth in claim 20 the further improvement wherein said three sets of yarn courses are defined by a set of parallel X yarns disposed approximately parallel to the longitudinal axis of said belt, a set of parallel Y yarns each disposed at an acute included angle measured clockwise relative to said X yarns, and a set of parallel Z yarns each disposed at an acute included angle measured counterclockwise relative to said X yarns.

Claim 26

Dependent Claim 36 words

In a belt as set forth in claim 22 the further improvement wherein said Y yarns define said one yarn set, said Y yarns being made of a synthetic plastic material and having improved structural strength.

Claim 27

Dependent Claim 37 words

In a belt as set forth in claim 22 the further improvement wherein at least one set of said Y and Z yarns is made of self-lubricating yarn filaments providing a self-lubricating action of said load-transmitting teeth.

Claim 28

Dependent Claim 28 words

In a belt as set forth in claim 24 the further improvement wherein said Y and Z yarns are disposed with an included angle of approximately 60° therebetween.

Claim 29

Dependent Claim 52 words

In a belt as set forth in claim 22 the further improvement wherein said Y yarns are disposed at said acute included angle with said X yarns ranging between 30° and 75°, and said Z yarns are disposed at said acute included angle with said X yarns ranging between 30° and 75°.

Claim 30

Dependent Claim 33 words

In a belt as set forth in claim 22 the further improvement wherein said belt has a tension and a load-carrying section, said load-carrying section being made of a helically wound load-carrying cord.

Claim 31

Dependent Claim 22 words

In a belt as set forth in claim 26 the further improvement wherein said tension section is free of an outer cover.

Claim 32

Dependent Claim 117 words

A belt drive system comprising a plurality of toothed sheaves including a driving sheave and a driven sheave and a toothed endless power transmission belt operatively connected between said sheaves, said belt having a compression section provided with load transmitting teeth defined by alternating projections and recesses and a fabric bonded against and defining the outer portions of said teeth, said fabric comprising a triaxial fabric having a plurality of three sets of yarn courses in which one of said three sets is substantially protected by the two other yarn sets, said one yarn set providing reinforcement of said teeth after substantial wear of said two other sets resulting in an increased service life for said belt.

Claim 33

Dependent Claim 117 words

A belt drive system comprising a plurality of toothed sheaves including a driving sheave and a driven sheave and a toothed endless power transmission belt operatively connected between said sheaves, said belt having a compression section provided with load transmitting teeth defined by alternating projections and recesses and a fabric bonded against and defining the outer portions of said teeth, said fabric comprising a triaxial fabric having a plurality of three sets of yarn courses in which one of said three sets is substantially protected by the two other yarn sets, said one yarn set providing reinforcement of said teeth after substantial wear of said two other sets resulting in an increased service life for said belt.

Claim 34

Dependent Claim 43 words

A belt drive system as set forth in claim 29 in which each of said sets of yarn courses is comprised of a plurality of spaced parallel yarns and each yarn of each set is defined by a plurality of side-by-side yarn strands.

Claim 35

Dependent Claim 28 words

A belt drive system as set forth in claim 30 in which each of said spaced parallel yarns of each set is defined by two side-by-side yarn strands.

Claim 36

Dependent Claim 78 words

A belt drive system as set forth in claim 30 in which said three sets of yarn courses are defined by a set of parallel X yarns disposed approximately parallel to the longitudinal axis of said belt, a set of parallel Y yarns each disposed at an acute included angle measured clockwise relative to said X yarns, and a set of parallel Z yarns each disposed at an acute included angle measured counterclockwise relative to said X yarns.

Claim 37

Dependent Claim 127 words

In a method of making an endless power transmission belt having a tension section, a compression section, and a load-carrying section bonded between said tension and compression sections with said compression section having a plurality of spaced belt elements defined by alternating projections and recesses, the improvement comprising the steps of, providing a triaxial fabric in the form of a pliable fabric, said triaxial fabric being defined by three angularly displaced sets of parallel courses of yarn interwoven to prevent slippage of at least one yarn course set along any other yarn course set, and bonding said triaxial fabric against said elements to define an abrasion-resistant inside surface for said belt, said triaxial fabric also minimizing shearing stresses in each element due to improved tear resistance thereof.

Claim 38

Dependent Claim 127 words

In a method of making an endless power transmission belt having a tension section, a compression section, and a load-carrying section bonded between said tension and compression sections with said compression section having a plurality of spaced belt elements defined by alternating projections and recesses, the improvement comprising the steps of, providing a triaxial fabric in the form of a pliable fabric, said triaxial fabric being defined by three angularly displaced sets of parallel courses of yarn interwoven to prevent slippage of at least one yarn course set along any other yarn course set, and bonding said triaxial fabric against said elements to define an abrasion-resistant inside surface for said belt, said triaxial fabric also minimizing shearing stresses in each element due to improved tear resistance thereof.

Claim 39

Dependent Claim 42 words

In a method as set forth in claim 33 the further improvement in which said bonding step comprises disposing said fabric against said elements independently of any particular orientation of its individual yarn courses relative to the longitudinal axis of said belt.

Claim 40

Dependent Claim 28 words

In a method as set forth in claim 33 the further improvement comprising the step of bonding said triaxial fabric against the outermost surface of said tension section.

Claim 41

Dependent Claim 28 words

In a method as set forth in claim 33 the further improvement comprising the step of bonding such triaxial fabric against the entire outer surface of said belt.

Claim 42

Dependent Claim 119 words

In a method of making an endless power transmission belt having a polymeric compression section provided with load-transmitting teeth defined by alternating projections and recesses, the improvement comprising the steps of, providing a triaxial fabric defined by a plurality of three sets of yarn courses in which one of said three sets is substantially protected by the two other yarn sets, and bonding said triaxial fabric against said teeth to define the outer portion thereof, said bonding step comprising disposing said yarn so that said one yarn set is protected by the two other yarn sets and provides reinforcement of said teeth after substantial wear of said two other sets resulting in an increased service life for said belt.

Claim 43

Dependent Claim 119 words

In a method of making an endless power transmission belt having a polymeric compression section provided with load-transmitting teeth defined by alternating projections and recesses, the improvement comprising the steps of, providing a triaxial fabric defined by a plurality of three sets of yarn courses in which one of said three sets is substantially protected by the two other yarn sets, and bonding said triaxial fabric against said teeth to define the outer portion thereof, said bonding step comprising disposing said yarn so that said one yarn set is protected by the two other yarn sets and provides reinforcement of said teeth after substantial wear of said two other sets resulting in an increased service life for said belt.

Claim 44

Dependent Claim 54 words

In a method as set forth in claim 37 the further improvement in which said providing step comprises providing said triaxial fabric with each of said sets of yarn courses comprised of a plurality of spaced parallel yarns and with each yarn of each set being defined by a plurality of side-by-side yarn strands.

Claim 45

Dependent Claim 53 words

In a method as set forth in claim 38 the further improvement in which said bonding step comprises coating said triaxial fabric with a layer of polymeric material compatible with the polymeric material of said compression section and curing said layer, compression section, and belt to provide a simultaneous bonding and curing action.

Claim 46

Dependent Claim 84 words

In a method as set forth in claim 38 the further improvement in which said providing step comprises providing said three sets of yarn courses defined by a set of parallel X yarns disposed approximately parallel to the longitudinal axis of said belt, a set of parallel Y yarns each disposed at an acute included angle measured clockwise relative to said X yarns, and a set of parallel Z yarns each disposed at an acute included angle measured counterclockwise relative to said X yarns.

Claim 47

Dependent Claim 44 words

In a method as set forth in claim 40 the further improvement in which said providing step comprises providing at least one set of said Y and Z yarns made of self-lubricating yarn filaments said filaments providing a self-lubricating action of said load-transmitting teeth.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1982-10-01	1983-04-02	1983-10-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1986-10-01	1987-04-02	1987-10-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1990-10-01	1991-04-02	1991-10-02	$7700.00	Window Closed / Lapsed

Endless power transmission belt, method of making same, and drive system using same

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