Patent US3879638A successfully refreshed from Google Patents.
US3879638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rescue hoist, static electric shock insulator
Assignee: Individual
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Filing: 1973-10-11
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Granted: 1975-04-22
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Expires: 1993-10-11
Abstract
Abstract A wire rope having a ball shaped swedged end and an insulative sleeve, a pair of steel collets surrounding the ball, a pair of nylon insulators separated by a thin gasket, surrounding the collets and held by a spring steel retainer and a steel adapter surrounding the insulator and so constructed to receive a hook assembly and to apply a compression force to the swedged end.
Inventors
- 👤 Douglas B Day
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:18
CPC Classifications
F; F16; F16G; F16G11/00; F16G11/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
An electrically shock proof adapter for helicopter rescue hoists comprising: a wire rope; a swedge means securely fixed to one end of the wire rope; collet means surrounding said shaped means and having one sloping exterior surface; insulator means encasing said collet means, having a closed surface and an apertured extension for receiving the wire rope, and a metal adapter means, encasing said insulator means having a sloped surface and further having an aperture on one end for passing the wire rope and insulator extension therethrough and threaded means at the opposing end for receiving similarly threaded rescue equipment.
Claim 2
Dependent Claim
99 words
An electrically shock proof adapter for helicopter rescue hoists comprising: a wire rope; a swedge means securely fixed to one end of the wire rope; collet means surrounding said shaped means and having one sloping exterior surface; insulator means encasing said collet means, having a closed surface and an apertured extension for receiving the wire rope, and a metal adapter means, encasing said insulator means having a sloped surface and further having an aperture on one end for passing the wire rope and insulator extension therethrough and threaded means at the opposing end for receiving similarly threaded rescue equipment.
References Cited (Backward Citations)
US3416033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |