US3717718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure cable
Assignee: KM Kabelmetal AG
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Filing: 1971-11-29
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Granted: 1973-02-20
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Expires: 1991-11-29
Abstract
Abstract Pressurized high voltage cable with a tubular, corrugated envelope that holds a high pressure medium, and a corrugated tube receiving the envelope and provided for radially supporting the envelope. Preferably, envelope and tube each being helically corrugated with opposite sense of winding and pitch, and a pressurized medium is maintained in the space between tube and envelope, the pressure of the medium being higher than the pressure on the outside of the tube but lower than the pressure in the envelope.
Inventors
- 👤 H Schmidtchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:38
CPC Classifications
H; H01; H01B; H01B9/00; H01B9/06; H01B9/0677
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
Pressurized high voltage cable having conductors contained in a tubular envelope, the envelope holding a high pressure medium, the envelope being corrugated, the corrugations extending around the axis of the envelope and including radially outwardly bulging corrugation crests, and a tube receiving the envelope, the tube being corrugated, the corrugations of the tube extending also around the axis of the tube and including inwardly bulging corrugation crests which extend obliquely to the crests of the envelope and provided for radially supporting the envelope, whereby the inwardly bulging crests of the tube can slide on the obliquely positioned, outwardly bulging crests of the envelope.
Claim 2
Dependent Claim
103 words
Pressurized high voltage cable having conductors contained in a tubular envelope, the envelope holding a high pressure medium, the envelope being corrugated, the corrugations extending around the axis of the envelope and including radially outwardly bulging corrugation crests, and a tube receiving the envelope, the tube being corrugated, the corrugations of the tube extending also around the axis of the tube and including inwardly bulging corrugation crests which extend obliquely to the crests of the envelope and provided for radially supporting the envelope, whereby the inwardly bulging crests of the tube can slide on the obliquely positioned, outwardly bulging crests of the envelope.
Claim 3
Dependent Claim
103 words
Pressurized high voltage cable having conductors contained in a tubular envelope, the envelope holding a high pressure medium, the envelope being corrugated, the corrugations extending around the axis of the envelope and including radially outwardly bulging corrugation crests, and a tube receiving the envelope, the tube being corrugated, the corrugations of the tube extending also around the axis of the tube and including inwardly bulging corrugation crests which extend obliquely to the crests of the envelope and provided for radially supporting the envelope, whereby the inwardly bulging crests of the tube can slide on the obliquely positioned, outwardly bulging crests of the envelope.
Claim 4
Dependent Claim
103 words
Pressurized high voltage cable having conductors contained in a tubular envelope, the envelope holding a high pressure medium, the envelope being corrugated, the corrugations extending around the axis of the envelope and including radially outwardly bulging corrugation crests, and a tube receiving the envelope, the tube being corrugated, the corrugations of the tube extending also around the axis of the tube and including inwardly bulging corrugation crests which extend obliquely to the crests of the envelope and provided for radially supporting the envelope, whereby the inwardly bulging crests of the tube can slide on the obliquely positioned, outwardly bulging crests of the envelope.
Claim 5
Dependent Claim
43 words
Pressurized cable as in claim 1, the envelope and the tube each being helically corrugated with opposite sense of winding and pitch so that the inwardly bulging crests of the tube can slide on the obliquely positioned, outwardly bulging crests of the envelope.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |