US3670092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hermetically sealed electrical fitting
Assignee: Caterpillar Inc
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Filing: 1970-09-04
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Granted: 1972-06-13
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Expires: 1990-09-04
Abstract
Abstract A hermetically sealed, insulated fitting for providing electrical continuity across a wall of an internally pressurized housing, an opening in the wall tapering outwardly toward the housing interior, a threaded flanged electrical element penetrating the opening with a flexible insulating member arranged about the element and being formed with a taper generally mating with the tapered opening the tapered surface being formed with a plurality of stepped ridges, the flanged electrical element being effective to urge the tapered insulating member into sealing engagement with the tapered hole and the element itself.
Inventors
- 👤 Kenneth W Updyke
- 👤 William J Grebner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:27
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/308
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
152 words
A hermetically sealed, insulated fitting providing electrical continuity across a wall of an internally pressurized housing, comprising: an opening formed by the wall, a portion of the opening tapering outwardly toward the housing interior, a threaded electrical element penetrating the opening and having a flanged end, a tapered, flexible insulating member arranged about the element and having a tapered surface generally mating with the tapered opening, the tapered surface being formed with a plurality of stepped ridges intimately engaging the tapered opening, the electrical element flange overlapping the insulating element, an insulating washer arranged about the electrical element on the exterior of said housing and spaced from said insulating member, and a nut threadedly engaging the element and acting on the washer urging the electrical element flange against the insulating member and compressing the insulating member into the tapered opening while maintaining a space between said insulating Member and said insulating washer.
Claim 2
Dependent Claim
152 words
A hermetically sealed, insulated fitting providing electrical continuity across a wall of an internally pressurized housing, comprising: an opening formed by the wall, a portion of the opening tapering outwardly toward the housing interior, a threaded electrical element penetrating the opening and having a flanged end, a tapered, flexible insulating member arranged about the element and having a tapered surface generally mating with the tapered opening, the tapered surface being formed with a plurality of stepped ridges intimately engaging the tapered opening, the electrical element flange overlapping the insulating element, an insulating washer arranged about the electrical element on the exterior of said housing and spaced from said insulating member, and a nut threadedly engaging the element and acting on the washer urging the electrical element flange against the insulating member and compressing the insulating member into the tapered opening while maintaining a space between said insulating Member and said insulating washer.
Claim 3
Dependent Claim
30 words
The fitting of claim 1 wherein a rigid washer is disposed between the nut and the insulating washer, a lock washer is disposed between the nut and the rigid washer.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |