US4123946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless power transmission belt and method of making same
Assignee: Dayco Products LLC
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Filing: 1977-05-02
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Granted: 1978-11-07
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Expires: 1997-05-02
Abstract
Abstract An endless power transmission belt and method of making same is provided wherein such belt is defined by a helically wound elongated strip of polymeric material having load-carrying means extending throughout its length with the strip having adjoining turns thereof bonded together so that the polymeric material thereof is a homogeneous mass and the belt is a unitary structure.
Inventors
- 👤 Gerald C. Hollaway, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:25
CPC Classifications
F; F16; F16G; F16G1/00; F16G1/14; F16G1/16; B; B29; B29D; B29D29/00; B29D29/10
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
49 words
An endless power transmission belt defined by a single continuous helically wound elongated strip of polymeric material having load-carrying means extending throughout its length, said strip having adjoining turns thereof bonded together so that said polymeric material thereof is a homogeneous mass and said belt is a unitary structure.
Claim 2
Dependent Claim
49 words
An endless power transmission belt defined by a single continuous helically wound elongated strip of polymeric material having load-carrying means extending throughout its length, said strip having adjoining turns thereof bonded together so that said polymeric material thereof is a homogeneous mass and said belt is a unitary structure.
Claim 3
Dependent Claim
17 words
A belt as set forth in claim 1 in which said load-carrying means comprises a load-carrying cord.
Claim 4
Dependent Claim
31 words
A belt as set forth in claim 2 in which said belt has an outside surface and an inside surface, said helically wound load-carrying cord being disposed midway between said surfaces.
Claim 5
Dependent Claim
38 words
A belt as set forth in claim 2 in which said belt has an outside surface and an inside surface and said helically wound load-carrying cord is disposed closer to said outside surface than to said inside surface.
Claim 6
Dependent Claim
20 words
A belt as set forth in claim 1 in which said polymeric material is in the form of an elastomer.
Claim 7
Dependent Claim
21 words
A belt as set forth in claim 1 in which said polymeric material is in the form of a thermoplastic material.
Claim 8
Dependent Claim
28 words
A belt as set forth in claim 1 in which said polymeric material serves as a matrix for a plurality of fibers embedded therein in a random manner.
Claim 9
Dependent Claim
23 words
A belt as set forth in claim 7 in which said fibers are disposed essentially parallel to the longitudinal axis of said belt.
Claim 10
Dependent Claim
22 words
A belt as set forth in claim 7 in which said fibers are disposed substantially transverse the longitudinal axis of said belt.
Claim 11
Dependent Claim
32 words
A belt as set forth in claim 1 and further comprising at least one fabric layer adjoining said polymeric material and defining a portion of said belt remote from said load-carrying means.
Claim 12
Independent Claim
90 words
A method of making endless power transmission belts comprising the steps of, continuously extruding a substantially uncured polymeric material and load-carrying means in a substantially simultaneous manner to define an elongated strip of said polymeric material having said load-carrying means extending throughout its length, helically winding said strip on a drum with turns thereof in adjoining relation to define an uncovered belt sleeve, curing said sleeve so that said polymeric material defines a cured homogeneous mass, cooling said sleeve, and cutting said sleeve to define a plurality of said belts.
Claim 13
Independent Claim
90 words
A method of making endless power transmission belts comprising the steps of, continuously extruding a substantially uncured polymeric material and load-carrying means in a substantially simultaneous manner to define an elongated strip of said polymeric material having said load-carrying means extending throughout its length, helically winding said strip on a drum with turns thereof in adjoining relation to define an uncovered belt sleeve, curing said sleeve so that said polymeric material defines a cured homogeneous mass, cooling said sleeve, and cutting said sleeve to define a plurality of said belts.
Claim 14
Dependent Claim
30 words
A method as set forth in claim 11 in which said continuously extruding step comprises continuously extruding a load-carrying cord within a mass of polymeric material of rectangular cross-sectional outline.
Claim 15
Dependent Claim
25 words
A method as set forth in claim 12 in which said continuously extruding step comprises extruding said load-carrying cord centrally within said rectangular cross-sectional outline.
Claim 16
Dependent Claim
34 words
A method as set forth in claim 12 in which said continuously extruding step comprises continuously extruding said load-carrying cord closer to one end of said rectangular cross-sectional outline than to the other end.
Claim 17
Dependent Claim
80 words
A method as set forth in claim 13 in which said cutting step comprises cutting said sleeve by providing a plurality of balanced cuts along the length thereof, said cuts being spaced and inclined in alternating directions along the length of said sleeve, said cuts defining belts of trapezoidal cross-section along the length of said sleeve such that alternate belts along the length of said sleeve upon being turned inside out are identical to the other belts along said sleeve.
Claim 18
Dependent Claim
46 words
A method as set forth in claim 11 and comprising the further step of wrapping at least one fabric layer against said drum prior to said continuously extruding step and wrapping at least one fabric layer against said uncovered belt sleeve prior to said curing step.
Claim 19
Dependent Claim
45 words
A method as set forth in claim 11 comprising the further step of wrapping a plurality of fabric layers around said drum prior to said continuously extruding step and wrapping a plurality of fabric layers around said uncovered belt sleeve prior to said curing step.
Claim 20
Dependent Claim
34 words
A method as set forth in claim 11 in which said curing step comprises placing said drum and sleeve in a curing device and curing said sleeve using steam under controlled temperatures and pressures.
Claim 21
Dependent Claim
21 words
A method as set forth in claim 17 in which said cooling step comprises cooling said sleeve employing a cooling fluid.
Claim 22
Dependent Claim
28 words
A method as set forth in claim 17 in which said cooling step comprises cooling said sleeve by immersing said sleeve in a container having cold tap water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |