Patent US4451692A successfully refreshed from Google Patents.
US4451692A
Expired / Lapsed
US
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Method of manufacturing a longitudinally watertight cable and longitudinally watertight cable thus obtained
Assignee: US Philips Corp
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Filing: 1982-08-02
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Granted: 1984-05-29
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Expires: 2002-08-02
Abstract
Abstract A method of manufacturing a longitudinally watertight cable in which a sealing mixture of a vulcanizable silicone rubber, a diluent and a filler is provided in the cable core and between the cable core and the sheath, which mixture, after curing, forms a watertight stopper. According to the invention, a bivalent or trivalent metal salt of a higher fatty acid or a mixture of higher fatty acids is used as a filler. A sealing mixture is preferably used in the method which comprises 15-25% by weight of a multicomponent silicone rubber, 35-45% by weight of silicone oil and 35-45% by weight of calcium stearate. The sealing mixture can be provided, in a blockwise manner, by means of an injection technique.
Inventors
- 👤 Adrianus M. M. Classens
- 👤 Frederik W. Aalbertsberg
- 👤 Hendrika G. Van Marle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:02
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/28; H01B7/282; H01B7/285; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2958; Y10T428/296; Y10T428/2962
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
163 words
In a method of manufacturing a longitudinally watertight cable comprising positioning a number of conductors within a sheath, filling the space between the conductors mutually and between the conductors and the sheath with a liquid sealing mixture comprising 15-25% by weight of a vulcanizable silicone rubber, a diluent and a filler, said liquid sealing mixture being convertable to a watertight seal by vulcanization of the silicone rubber, then vulcanizing said silicone rubber to thereby convert said sealing mixture to a watertight seal between said conductors and between said conductors mutually, the improvement wherein the vulcanizable silicone rubber is a multicomponent silicone rubber vulcanizable at room temperature through an addition reaction in which no low molecular weight reaction products are formed, the diluent is a silicone oil and the filler is a salt of a higher fatty acid or a mixture of higher fatty acids with a bivalent or trivalent metal, said salt being present in an amount about at least 35% by weight.
Claim 2
Dependent Claim
163 words
In a method of manufacturing a longitudinally watertight cable comprising positioning a number of conductors within a sheath, filling the space between the conductors mutually and between the conductors and the sheath with a liquid sealing mixture comprising 15-25% by weight of a vulcanizable silicone rubber, a diluent and a filler, said liquid sealing mixture being convertable to a watertight seal by vulcanization of the silicone rubber, then vulcanizing said silicone rubber to thereby convert said sealing mixture to a watertight seal between said conductors and between said conductors mutually, the improvement wherein the vulcanizable silicone rubber is a multicomponent silicone rubber vulcanizable at room temperature through an addition reaction in which no low molecular weight reaction products are formed, the diluent is a silicone oil and the filler is a salt of a higher fatty acid or a mixture of higher fatty acids with a bivalent or trivalent metal, said salt being present in an amount about at least 35% by weight.
Claim 3
Dependent Claim
13 words
The method of claim 1 wherein the metal is an alkaline earth metal.
Claim 4
Dependent Claim
11 words
The method of claim 2 wherein the salt is calcium stearate.
Claim 5
Dependent Claim
34 words
The method of claim 3 wherein the liquid sealing mixture consists essentially of 15-25% by weight of a silicone oil and 35-45% by weight of calcium stearate in addition to said vulcanizable silicone rubber.
Claim 6
Dependent Claim
11 words
A longitudinally watertight cable obtained by the method of claim 1.
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) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |