Patent US3825271A successfully refreshed from Google Patents.
US3825271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid sealing device for electric cable curing apparatus
Assignee: Pirelli and C SpA
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Filing: 1973-01-10
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Granted: 1974-07-23
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Expires: 1993-01-10
Abstract
Abstract A sealing device for controlling the water flow from between a cable sheath and the end of a sheath curing tube as the cable passes through the tube, the sealing device comprising a frustoconical elastic sleeve having its larger inner diameter larger than the sheath diameter and its smaller inner diameter approximately equal to that of the cable sheath. Most of the exterior surface of the sleeve is covered by a rigid sleeve shaped like the elastic sleeve but having a portion spaced from the smaller diameter end of the elastic sleeve to form a chamber which receives an air expandible elastic member in the shape of a toroid to vary the diameter of the elastic sleeve opening. The rigid sleeve also covers most of the smaller diameter end of the elastic sleeve to hold the latter in place but has an opening larger than the maximum sheath diameter to be processed.
Inventors
- 👤 A Bellastio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:54
CPC Classifications
B; B29; B29C; B29C35/00; B29C35/02; B29C35/04; B29C35/06; B29C35/065; B29C48/00; B29C48/03; B29C48/06; B29C48/09; B29K; B29K2021/00; Y; Y10; Y10S; Y10S277/00; Y10S277/906
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
204 words
In cable curing apparatus having a fluid containing tube through which said cable is passed during the curing thereof, the combination therewith of an adjustable sealing device for the end of said curing tube, said sealing device comprising an elastic sleeve having a frusto-conical interior surface, said cable being receivable within said sleeve and being longitudinally slidable with respect to said surface, the diameter of the larger diameter end of said surface being larger than the maximum cable diameter and the smaller diameter end of said sleeve having an interior surface diameter approximately equal to the nominal cable diameter and being expandible by the cable to the maximum cable diameter without causing significant flow of the cable exterior surface material, a rigid sleeve extending around and engaging the exterior surface of said elastic sleeve but having a portion spaced from said exterior surface at the smaller diameter end of said interior surface, fluid expandible elastic means intermediate said portion and said elastic sleeve and extending around said elastic sleeve for varying the diameter of the interior surface of said elastic sleeve at said smaller diameter end thereof, and means for supplying a fluid under pressure to said elastic means for varying the size thereof.
Claim 2
Dependent Claim
204 words
In cable curing apparatus having a fluid containing tube through which said cable is passed during the curing thereof, the combination therewith of an adjustable sealing device for the end of said curing tube, said sealing device comprising an elastic sleeve having a frusto-conical interior surface, said cable being receivable within said sleeve and being longitudinally slidable with respect to said surface, the diameter of the larger diameter end of said surface being larger than the maximum cable diameter and the smaller diameter end of said sleeve having an interior surface diameter approximately equal to the nominal cable diameter and being expandible by the cable to the maximum cable diameter without causing significant flow of the cable exterior surface material, a rigid sleeve extending around and engaging the exterior surface of said elastic sleeve but having a portion spaced from said exterior surface at the smaller diameter end of said interior surface, fluid expandible elastic means intermediate said portion and said elastic sleeve and extending around said elastic sleeve for varying the diameter of the interior surface of said elastic sleeve at said smaller diameter end thereof, and means for supplying a fluid under pressure to said elastic means for varying the size thereof.
Claim 3
Dependent Claim
70 words
A sealing device as set forth in claim 1, wherein said rigid sleeve has a portion which extends radially inwardly and engages the end of said elastic sleeve having said smaller diameter interior surface to oppose movement of said elastic sleeve axially thereof, said last-mentioned portion having an opening therethrough co-axial with the axis of said interior surface and of a diameter larger than said maximum diameter of said cable.
Claim 4
Dependent Claim
33 words
A sealing device as set forth in claim 2, wherein said expandible elastic means comprises an elastic element in the shape of a toroid and is free to separate from said elastic sleeve.
Claim 5
Dependent Claim
26 words
A sealing device as set forth in claim 3, wherein said means for supplying fluid under pressure comprises a detachable tube and a fluid pressure reducer.
Claim 6
Dependent Claim
46 words
A sealing device as set forth in claim 3, further comprising means for securing said larger diameter end of said elastic sleeve to an end of said curing tube with the axis of said interior surface co-axial with the opening in said end of said tube.
Claim 7
Dependent Claim
32 words
A sealing device as set forth in claim 5, wherein said tube comprises a cooling liquid in the portion thereof adjacent said end thereof and a high temperature fluid adjacent said liquid.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-22 | 1978-01-21 | 1978-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-22 | 1982-01-21 | 1982-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-22 | 1986-01-21 | 1986-07-23 | $7700.00 | Window Closed / Lapsed |