US4137787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency stretch belt
Assignee: Dayco Products LLC
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Filing: 1977-11-07
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Granted: 1979-02-06
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Expires: 1997-11-07
Abstract
Abstract An emergency stretch belt and a process for making same are described. This belt is capable of an elongation of at least 11/2 percent after vulcanization and comprises a body portion of flexible elastomeric material having a load carrying section embedded in the body portion including an undulating strength member. The belt of this invention is made by assembling a belt structure upon a forming mandrel, placing the belt structure around a curing mandrel having a smaller diameter than the diameter of the forming mandrel, and vulcanizing the belt structure to form a completed belt structure.
Inventors
- 👤 Dale L. Waugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:30
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/04; F16G5/06; B; B29; B29D; B29D29/00; B29D29/10; F16G5/16; F16G5/166
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
110 words
A process for making a power transmission belt structure capable of an elongation of at least 11/2 percent after vulcanization, said belt structure comprising a body portion of flexible elastomeric material and a load-carrying section embedded in said body portion including an undulating strength member, said process comprising the steps of: a. concentrically assembling layers of elastomeric material and a strength member around a cylindrical forming mandrel to form said belt structure therefrom. b. placing said belt structure around a cylindrical curing member, said curing mandrel having a smaller diameter than the diameter of said forming mandrel; and c. vulcanizing said belt structure to form a completed belt structure therefrom.
Claim 2
Dependent Claim
110 words
A process for making a power transmission belt structure capable of an elongation of at least 11/2 percent after vulcanization, said belt structure comprising a body portion of flexible elastomeric material and a load-carrying section embedded in said body portion including an undulating strength member, said process comprising the steps of: a. concentrically assembling layers of elastomeric material and a strength member around a cylindrical forming mandrel to form said belt structure therefrom. b. placing said belt structure around a cylindrical curing member, said curing mandrel having a smaller diameter than the diameter of said forming mandrel; and c. vulcanizing said belt structure to form a completed belt structure therefrom.
Claim 3
Dependent Claim
103 words
The process of claim 1 wherein said assembling step comprises winding a layer of elastomeric material around said forming member to form the compression section of said belt structure, winding a first layer of elastomeric cushion stock around said compression layer, winding a strength member around said cushion stock, winding a second layer of said cushion stock over said strength member, said first and second layers of cushion stock and said strength member forming the load-carrying section of said belt structure, and winding an outer layer of elastomeric material to form the tension section of said belt structure over said second cushion layer.
Claim 4
Dependent Claim
23 words
The process of claim 2 wherein said elastomeric material forming said compression contains up to about 40 phr of discrete fibers dispersed therein.
Claim 5
Dependent Claim
27 words
The process of claim 3 wherein said elastomeric material contains from about 0.5 to about 15 parts of said fibers per 100 parts of said elastomeric material.
Claim 6
Dependent Claim
15 words
The process of claim 2 wherein said strength member is a continuous helically-wound strength cord.
Claim 7
Dependent Claim
13 words
The process of claim 2 wherein said strength member is a stretch fabric.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein said fabric is a knit fabric.
Claim 9
Dependent Claim
26 words
The process of claim 1 wherein said curing member has a diameter about 1.5 to about 13 percent less than the diameter of said forming member.
Claim 10
Dependent Claim
16 words
The process of claim 1 wherein said belt structure is formed in a generally trapezoidal shape.
Claim 11
Dependent Claim
122 words
The process of claim 1 wherein said assembling step comprises winding a layer of stretch fabric around said forming member, winding a layer of elastomeric material around said fabric layer to form the compression section of said belt, winding a first layer of elastomeric cushion stock around said compression layer, winding a strength member around said compression layer, winding a second layer of said cushion stock over said strength member, said first and second layers of cushion stock and said strength members forming the load-carrying section of said belt structure, winding a layer of elastomeric material around said second layer of cushion stock to form the tension section of said belt, and winding a layer of stretch fabric over said tension layer.
Claim 12
Dependent Claim
23 words
The process of claim 10 wherein said elastomeric material forming said compression contains up to about 40 phr of discrete fibers dispersed therein.
Claim 13
Dependent Claim
27 words
The process of claim 11 wherein siad elastomeric material contains from about 0.5 to about 15 parts of said fibers per 100 parts of said elastomeric material.
Claim 14
Dependent Claim
15 words
The process of claim 10 wherein said strength member is a continuous helically-wound strength cord.
Claim 15
Dependent Claim
13 words
The process of claim 10 wherein said strength member is a stretch fabric.
Claim 16
Dependent Claim
12 words
The process of claim 14 wherein said fabric is a knit fabric.
Claim 17
Dependent Claim
24 words
The process of claim 1 wherein said belt structure is wrapped with a stretch fabric prior to placing said structure around said curing member.
Claim 18
Dependent Claim
36 words
A power transmission belt structure capable of an elongation of at least 11/2 percent comprising a body portion of flexible elastomeric material and a load-carrying section embedded in said body portion including an undulating strength member.
Claim 19
Dependent Claim
36 words
A power transmission belt structure capable of an elongation of at least 11/2 percent comprising a body portion of flexible elastomeric material and a load-carrying section embedded in said body portion including an undulating strength member.
Claim 20
Dependent Claim
22 words
The belt of claim 17 wherein said body portion comprises an inner compression section, said load-carrying section and an outer tension section.
Claim 21
Dependent Claim
24 words
The belt of claim 18 wherein said compression section comprises an elastomeric material containing up to about 40 phr of discrete fibers dispersed therethrough.
Claim 22
Dependent Claim
22 words
The belt of claim 19 wherein said fibers are oriented in a direction approximately 90° to the endless path of said belt.
Claim 23
Dependent Claim
27 words
The belt of claim 19 wherein said elastomeric material contains from about 0.5 to about 15 parts of said fibers per 100 parts of said elastomeric material.
Claim 24
Dependent Claim
23 words
The belt of claim 17 wherein said load-carrying section comprises a plurality of strength cords in side-by-side relation embedded in a cushion stock.
Claim 25
Dependent Claim
13 words
The belt of claim 17 wherein said strength member is a stretch fabric.
Claim 26
Dependent Claim
12 words
The belt of claim 23 wherein said fabric is a knit fabric.
Claim 27
Dependent Claim
18 words
The belt of claim 17 wherein the top and bottom surfaces thereof are covered with a stretch fabric.
Claim 28
Dependent Claim
14 words
The belt of claim 17 having a stretch fabric covering on all surfaces thereof.
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) | 1982-02-05 | 1982-08-07 | 1983-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-05 | 1986-08-07 | 1987-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-05 | 1990-08-07 | 1991-02-06 | $7700.00 | Window Closed / Lapsed |