Patent US4146858A successfully refreshed from Google Patents.
US4146858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coil assembly for an electromagnetic high energy impact apparatus
Assignee: Boeing Co
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Filing: 1978-01-26
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Granted: 1979-03-27
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Expires: 1998-01-26
Abstract
Abstract An EMR coil assembly having a split housing including a coil-retaining body member and ring member attached thereto, the EMR coil assembly including a coil having a plurality of polyimide face sheets disposed between a polyester face sheet forming the outer wear surface of the coil and a major surface of the coil.
Inventors
- 👤 Arthur W. McDermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:10
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F41/04; H01F27/00; H01F27/28; H01F27/30; H01F27/306; H01F5/00; H01F5/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49071
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
88 words
An electromagnetic riveting coil assembly having a split housing including a coil-retaining body member and ring member attached thereto, said electromagnetic riveting coil assembly including a coil disposed within said coil-retaining body member, said coil having a plurality of polyimide face sheets disposed between a polyester face sheet forming the outer wear surface of the coil and a major surface of the coil, and said polyimide face sheet extending between said coil-retaining body member and said ring member and coextensive with the outer periphery of said ring member.
Claim 2
Dependent Claim
88 words
An electromagnetic riveting coil assembly having a split housing including a coil-retaining body member and ring member attached thereto, said electromagnetic riveting coil assembly including a coil disposed within said coil-retaining body member, said coil having a plurality of polyimide face sheets disposed between a polyester face sheet forming the outer wear surface of the coil and a major surface of the coil, and said polyimide face sheet extending between said coil-retaining body member and said ring member and coextensive with the outer periphery of said ring member.
Claim 3
Dependent Claim
20 words
The invention according to claim 1 wherein said polyester face sheet has a thickness of 7 mil ± 1 mil.
References Cited (Backward Citations)
US3231842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |