US3716733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric motor with corrugated plastic protective covering on the lead wires
Assignee: Individual
•
Filing: 1972-02-02
•
Granted: 1973-02-13
•
Expires: 1992-02-02
Abstract
Abstract Electrical lead wires, for example, from the stator of a hermetically sealed electric motor to a junction box are encased in a corrugated sheath of polyethylene terephthalate. The corrugations effectively increase the spacing between the primary insulation on the lead wires and regions of potential insulation abrasion and wear on the stator laminations or the compressor casing.
Inventors
- 👤 R Barnes
- 👤 M Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:02
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/22; H02K5/225
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
In an apparatus having an electric motor stator, a source of electric power, and at least one lead wire connecting the stator to the source of electric power, said lead wire having an outer insulation layer, the improvement comprising a flexible corrugated plastic covering surrounding the insulation layer of said lead wire, the corrugations of said covering having a height appreciably greater than the wall thickness of said covering and serving to space the insulation layer of the lead wire from sources of possible abrasion.
Claim 2
Dependent Claim
85 words
In an apparatus having an electric motor stator, a source of electric power, and at least one lead wire connecting the stator to the source of electric power, said lead wire having an outer insulation layer, the improvement comprising a flexible corrugated plastic covering surrounding the insulation layer of said lead wire, the corrugations of said covering having a height appreciably greater than the wall thickness of said covering and serving to space the insulation layer of the lead wire from sources of possible abrasion.
Claim 3
Dependent Claim
39 words
An apparatus according to claim 1, wherein said electric motor stator is disposed within a compressor housing, and wherein said covering is exposed to and is compatible with a refrigerant gas and a mineral oil within said compressor housing.
Claim 4
Dependent Claim
14 words
An apparatus according to claim 2, wherein said covering is made of polyethylene terephthalate.
Claim 5
Dependent Claim
45 words
An apparatus according to claim 3, wherein voids are provided between the outer surface of the insulation layer of the lead wire and the inner suRfaces of the corrugations, and further comprising mineral oil in said voids to function as an electrical insulating medium therein.
Claim 6
Dependent Claim
15 words
An apparatus according to claim 1, wherein the corrugations in said covering are heat set.
Claim 7
Dependent Claim
13 words
Apparatus according to claim 5, wherein said covering is made of polyethylene terephthalate.
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) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |