US3656360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane belts
Assignee: Goodyear Tire and Rubber Co
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Filing: 1969-01-17
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Granted: 1972-04-18
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Expires: 1989-01-17
Abstract
Abstract A cured polyurethane composition prepared by mixing a particulate polyfluorohydrocarbon resin with a liquid polyurethane prepolymer and curing the said prepolymer with a curing agent. The cured polyurethane composition has utility in power transmission belts and particularly power transmission belts of the V-type, and other relatively flat-type belts which operate in conjunction with pulleys or sprockets and are subject to relatively severe flexing during their operation.
Inventors
- 👤 Sidney R Fix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:08
CPC Classifications
F; F16; F16G; F16G5/00; F16G5/12; F16G5/14; B; B29; B29D; B29D29/00; B29D29/10; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/67; C08G18/69; C08L; C08L75/00; C08L75/04; Y; Y10; Y10S; Y10S425/00; Y10S425/818; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512; Y10T428/2457; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/3158
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
at least one organic polyisocyanate, the overall molar ratio of the isocyanato groups of the polyisocyanate to the reactive hydrogens of the hydrogen-containing polymeric material being between about 1.1/1 and about 12/1; and B. curing the polyurethane prepolymer of the said prepolymer mixture by mixing with a curing agent selected from the group consisting of diamines having primary amino groups, diamines having secondary amino groups, hydrocarbon diols, and hydroxyl amines having primary amino groups, the overall ratio of the amino and hydroxyl groups of the curing agent to the isocyanato groups in excess of the reactive hydrogen groups of the reactive hydrogen-containing polymeric material being from about 0.5/1 to about 1.5/1.
Claim 2
Dependent Claim
15 words
The industrial belt of claim 1 having a body portion of a generally trapezoidal cross-section.
Claim 3
Dependent Claim
41 words
The industrial belt of claim 1 wherein the belt contains a reinforcing tension member extending generally longitudinally of the belt and composed of material selected from at least one of the group consisting of cotton, nylon, rayon, polyester, wire and glass.
Claim 4
Dependent Claim
78 words
The industrial belt as claimed in claim 1 wherein the polyfluorohydrocarbon resin is polytetrafluoroethylene having a particle size of from about 0.1 to about 2,000 microns; the reactive hydrogen-containing polymeric material is selected from the group consisting of polyether glycols and hydroxyl terminated linear polymeric polyesters; and polyisocyanate is selected from the group consisting of the toluene diisocyanates, diphenylmethane-4,4''-diisocyanate and 3,3''-dimethyl-4,4-bis-phenylene diisocyanate; and the curing agent is a diamine selected from the group consisting of orthodichlorobenzidine and methylene-bis-orthochloroaniline.
Claim 5
Dependent Claim
29 words
The industrial belt as claimed in claim 4 wherein the reactive hydrogen-containing polymeric material is polytetramethylene ether glycol, the polyisocyanate is toluene diisocyanate and the curing agent is methylene-bis-orthochloroaniline.
Claim 6
Dependent Claim
27 words
The industrial belt as claimed in claim 1 having a generally rectangular cross-section with one surface thereof including a plurality of corrugations extending transversely of the belt.
Claim 7
Dependent Claim
21 words
The industrial belt of claim 6 wherein the belt includes at least one row of spaced openings therein between said corrugations.
References Cited (Backward Citations)
US3200662A
Cited
US3227596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |