US3844834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature-stable abrasion-resistant coatings for conductors
Assignee: Westinghouse Electric Corp
•
Filing: 1972-04-17
•
Granted: 1974-10-29
•
Expires: 1992-04-17
Abstract
Abstract Conductors which are subjected to abrasion at elevated temperatures, such as certain motor or generator windings, are protected against the abrasion by an acrylic rubber coating. A flowable dispersion in an organic solvent of an acrylic rubber, a curing system for the acrylic rubber, and a filler is prepared and applied to the conductor. The solvent is evaporated and the acrylic rubber is cured to form the protective coating.
Inventors
- 👤 D Jerson
- 👤 H Minter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:28
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/447; H01B3/308; H01B7/00; H01B7/17; H01B7/18; H01B7/1855; H02; H02K; H02K3/00; H02K3/32; H02K3/34; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2949
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
74 words
AN INSULATED CONDUCTOR FOR A MOTOR OR GENERATOR TO BE COOLED WITH AIR CONTAINING ABRASIVE PARTICLES COMPRISING AT LEAST ONE METAL BAR COVERED WITH ELECTRICALLY NONCONDUCTIVE INSULATION WHICH IS COATED WITH A CURED ACRYLIC RUBBER COMPOSITION WHICH COMPRISES A FILLER, A CURING SYSTEM, AND A COPOLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 100,000 POLYMERIZED FROM MONOMERS ABOUT 50 TO 95 PERCENT SELECTED FROM THE GROUP CONSISTING OF ESTERS OF ACRYLIC ACID, METHACRYLIC
Claim 2
Dependent Claim
74 words
AN INSULATED CONDUCTOR FOR A MOTOR OR GENERATOR TO BE COOLED WITH AIR CONTAINING ABRASIVE PARTICLES COMPRISING AT LEAST ONE METAL BAR COVERED WITH ELECTRICALLY NONCONDUCTIVE INSULATION WHICH IS COATED WITH A CURED ACRYLIC RUBBER COMPOSITION WHICH COMPRISES A FILLER, A CURING SYSTEM, AND A COPOLYMER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 100,000 POLYMERIZED FROM MONOMERS ABOUT 50 TO 95 PERCENT SELECTED FROM THE GROUP CONSISTING OF ESTERS OF ACRYLIC ACID, METHACRYLIC
Claim 3
Dependent Claim
44 words
about 5 to about 50 percent vinyl monomers co-reactive with said esters and having only one double bond; b. about 0.2 to about 30 phr of a curing system for said acrylic rubber; and c. about 10 to about 200 phr of a filler.
Claim 4
Dependent Claim
44 words
about 5 to about 50 percent vinyl monomers co-reactive with said esters and having only one double bond; b. about 0.2 to about 30 phr of a curing system for said acrylic rubber; and c. about 10 to about 200 phr of a filler.
Claim 5
Dependent Claim
18 words
An insulated conductor according to claim 1 wherein said coating is about 20 to about 100 mils thick.
Claim 6
Dependent Claim
17 words
An insulated conductor according to claim 2 wherein said esters are alkyl esters from C1 to C8.
Claim 7
Dependent Claim
24 words
An insulated conductor according to claim 3 wherein said esters are selected from the group consisting of ethyl acrylate, butyl acrylate, and mixtures thereof.
Claim 8
Dependent Claim
14 words
An insulated conductor according to claim 1 wherein said vinyl monomer is chlorovinyl ether.
Claim 9
Dependent Claim
12 words
An insulated conductor according to claim 1 wherein said filler includes silica.
Claim 10
Dependent Claim
18 words
An insulated conductor according to claim 1 wherein said filler includes carbon black and said coating is semiconducting.
Claim 11
Dependent Claim
30 words
An insulated conductor according to claim 1 wherein said electrically non-conductive insulation is selected from the group consisting of glass, mica, and mixtures thereof impregnated with a cured insulating resin.
Claim 12
Dependent Claim
35 words
An insulated conductor according to claim 1 wherein said acrylic rubber composition comprises a. an acrylic rubber which comprises a copolymer having a molecular weight of at least about 100,000 polymerized from monomers which are
Claim 13
Dependent Claim
20 words
An insulated conductor according to claim 9 wherein the amount of said filler is about 30 to about 150 phr.
Claim 14
Dependent Claim
21 words
An insulated conductor according to claim 1 wherein said acrylic rubber composition has a glass transition temperature of less than -10*C.
Claim 15
Dependent Claim
24 words
An insulated conductor according to claim 1 wherein said copolymer has a saturated chain backbone and side chains containing at least two carbon atoms.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |