US3932928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of insulating stator coils
Assignee: United States Department of the Navy
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Filing: 1974-01-02
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Granted: 1976-01-20
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Expires: 1994-01-02
Abstract
Abstract An apparatus and method for producing a replicate, void free, impermeable,ymmetrical electrical insulation barrier for stator motor coils is described wherein a silicone rubber compound is employed as an insulator around the preformed stator coils in a copper-beryllium mold. The coil insulation is cured at a predetermined temperature after being subjected to pressure in the mold.
Inventors
- 👤 George E. S. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:56
CPC Classifications
H; H02; H02K; H02K15/00; H02K15/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49009; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
A method of insulating stator motor coils in a mold, comprising the steps of: centering the stator motor coils in a cavity of the mold; placing lead spacers along the length of the stator motor coils and the lead wires thereof; applying high pressure to the mold for preforming the stator motor coils; skip-lapping a fiberglass tape around the preformed stator motor coils; butt-lapping a silicone rubber tape over the skip-lapped fiberglass tape around the preformed stator motor coils; placing the mold containing the silicone butt-lapped stator motor coils in a preheated platten of a hydraulic press; applying pressure to the mold while placed on the preheated platten of the hydraulic press; releasing the pressure applied to the mold; removing the mold from the preheated platten of the hydraulic press; and curing the molded stator motor coils in a oven.
Claim 2
Independent Claim
140 words
A method of insulating stator motor coils in a mold, comprising the steps of: centering the stator motor coils in a cavity of the mold; placing lead spacers along the length of the stator motor coils and the lead wires thereof; applying high pressure to the mold for preforming the stator motor coils; skip-lapping a fiberglass tape around the preformed stator motor coils; butt-lapping a silicone rubber tape over the skip-lapped fiberglass tape around the preformed stator motor coils; placing the mold containing the silicone butt-lapped stator motor coils in a preheated platten of a hydraulic press; applying pressure to the mold while placed on the preheated platten of the hydraulic press; releasing the pressure applied to the mold; removing the mold from the preheated platten of the hydraulic press; and curing the molded stator motor coils in a oven.
Claim 3
Dependent Claim
33 words
The method of claim 1 wherein said step of centering the stator motor coils in a cavity of the mold includes temporarily securing the stator motor coils by means of ties of twine.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |