EP0212851A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Protection of cables and pipes
Assignee: Raychem Corp
•
Filing: 1986-07-18
•
Granted: —
•
Expires: 2006-07-18
Abstract
Abstract Cables and pipes may be protected against the environment by installing in tight-fitting engagement over them a double-walled article that allows shear between its two walls eliminating shear between the walls and the cable or pipe.
Inventors
- 👤 Peter Lars Larsson
- 👤 Stephen Edward Sheehan
- 👤 Neil Lawrence Holt
- 👤 Manoochehr Mohebban
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:55
CPC Classifications
F; F16; F16L; F16L9/00; F16L9/18; H; H02; H02G; H02G15/00; H02G15/013; F16L47/00; F16L47/20; F16L5/00; F16L5/02; F16L58/00; F16L58/18; F16L58/181; F16L59/00; F16L59/14; F16L59/16; F16L59/18; F16L59/20; H01; H01B; H01B17/00; H01B17/26; H01B17/30; H01B17/303; H01B17/306; H02G15/08; H02G15/18
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
56 words
A method of covering a supply line, which comprises revolving onto the supply line an article having a double wall and being capable of continuously revolving along an elongate member by relative sliding motion between the two walls of the double wall substantially without relative sliding motion between a wall adjacent the member and the member.
Claim 2
Independent Claim
56 words
A method of covering a supply line, which comprises revolving onto the supply line an article having a double wall and being capable of continuously revolving along an elongate member by relative sliding motion between the two walls of the double wall substantially without relative sliding motion between a wall adjacent the member and the member.
Claim 3
Dependent Claim
25 words
A method according to claim 1, in which the article comprises a double-walled tube, the double wall defining a closed region between its two walls.
Claim 4
Dependent Claim
20 words
A method according to claim 1 or 2, having between the two walls a separating means and/or a friction-reducing means.
Claim 5
Dependent Claim
29 words
A method according to claim 3, in which the friction-reducing means is capable of maintaining lubrication between said two walls under a pressure gradient of 27 kPa per cm.
Claim 6
Dependent Claim
40 words
A method according to claim 3, in which the friction-reducing means comprises a non-newtonian liquid having a viscosity at a shear rate of 1 reciprocal second greater than 5 times the viscosity at a shear rate of 10 reciprocal seconds.
Claim 7
Dependent Claim
12 words
A method according to claim 5, in which the liquid exhibits pituity.
Claim 8
Dependent Claim
22 words
A method according to claim 5 or 6, in which the liquid comprises a dilute solution of a high molecular weight polymer.
Claim 9
Independent Claim
26 words
A method according to any preceding claim, in which environmental protection, electrical protection, and/or thermal insulation or conductivity is provided at least partly by said article.
Claim 10
Dependent Claim
35 words
A method according to any of claim 1-7, in which environmental protection, electrical protection and/or thermal insulation or conductivity is provided at least partly by an object delivered to the supply line by said article.
Claim 11
Dependent Claim
13 words
A method according to claim 9, in which said object comprises a shed.
Claim 12
Dependent Claim
25 words
A method according to claim 8 or 9, in which environmental protection, electrical protection and/or thermal insulation or conductivity is supplemented by a sealing material.
Claim 13
Dependent Claim
18 words
A method according to claim 11, in which said revolving forces the sealing material against the supply line.
Claim 14
Independent Claim
26 words
A method according to any of claims 1-7, in which the supply line comprises two pipes that are mechanically secured end to end by said article.
Claim 15
Dependent Claim
35 words
A method according to claim 8 or 9, in which electrical insulation is provided around a conductor, said article or said object comprising a material having a resistivity of greater than 10 13 ohm cm.
Claim 16
Dependent Claim
45 words
A method according to claim 8 or 9, in which electrical stress-grading is provided around a high voltage conductor splice or termination, said article or object comprising a material having a specific impedance of 10 7 - 10 10 ohm cm at 60 H z.
Claim 17
Dependent Claim
37 words
A method according to claim 8 or 9, in which electrical shielding is provided around a conductor splice or termination, said article or object comprising a material having a resistivity of less than 10 4 ohm cm.
Claim 18
Dependent Claim
40 words
A method according to claim 8 or 9, in which electrical protection is provided around a high voltage conductor splice or termination, said article or object comprising a material having an electrical strength of at least 50 kV per cm.
Claim 19
Independent Claim
39 words
A method according to any preceding claim, in which said article or object comprises a material having a tear resistance as measured by ASTM D 624, Die C, of at 90 N per cm (50 lb. per linear inch).
Claim 20
Independent Claim
26 words
A method according to any preceding claim, in which the article or object comprises a material that is substantially non-tracking as defined by ASTM D 2303.
Claim 21
Independent Claim
36 words
A method according to any preceding claim, in which environmental protection is provided around a cable splice or termination, said article or object comprising a material having a maximum water absorption less than 2% by weight.
Claim 22
Independent Claim
48 words
A method according to any preceding claim, in which a high voltage conductor splice or termination is covered by said article, in which the double-wall defines a closed region between the walls, said region containing a liquid having a boiling point at 1 bar of at least 130°C.
Claim 23
Independent Claim
36 words
A method according to any preceding claim, in which an environmental seal is provided between said supply line and a duct or bulkhead through which it passes, said article comprising two substantially concentric double walled tubes.
Claim 24
Independent Claim
35 words
A method according to any of claims 1-12, in which environmental protection is provided around a telecommunications cable splice, said method additionally comprising positioning around said splice a liner over which the article is revolved.
Claim 25
Independent Claim
23 words
A method according to any preceding claim, in which the article comprises a double-walled tube, a curable composition being provided between the walls.
Claim 26
Dependent Claim
32 words
A method according to claim 24, in which the supply line comprises a multi-core cable, said method additionally comprising forming a cable block by delivering said curable composition to the cable core.
Claim 27
Independent Claim
60 words
A method according to any preceding claim, in which the article comprises a double-walled tube defining a closed region between its two walls having therein a separation means, the volume of the closed region being such that when the article is on the supply line the average separation between its walls is less than 10 times its average wall thickness.
Claim 28
Independent Claim
55 words
A method according to any preceding claim, in which the double wall comprises one or more elastomeric materials and is of such a size relative to that of the supply line that said revolving involves stretching the material of the wall adjacent the supply line by an average of 10-150% based on its unstressed dimension.
Claim 29
Dependent Claim
43 words
A method according to claim 1 in which a cable is sealed to an outlet in a housing through which it enters the housing, said article being attached to the outlet, and said revolving being caused by inserting the cable into the outlet.
Claim 30
Independent Claim
38 words
A method according to any preceding claim, which additionally comprises causing shear or peel between the two walls in the absence of said revolving, such that each of said walls is caused to lie adjacent the supply line.
Claim 31
Independent Claim
25 words
A method according to any preceding claim, in which at least one wall of said double-walls comprises at least two layers having different electrical properties.
Claim 32
Independent Claim
63 words
A method according to any preceding claim, in which the article is revolved onto an end of the supply line by engaging one wall of the double wall and said end of the supply line, and applying an axial compressive force between the supply line and the other wall at a position less than 7 cm from said end of the supply line.
Claim 33
Dependent Claim
105 words
A kit of parts suitable for carrying out a method according to any of claims 1-31, which comprises a double-walled article capable of continuously revolving along a substrate, and one or more of the following: means for cleaning a surface of a supply line; a liner that can surround the supply line and over which the double-walled tube can be revolved; a casing that can be secured around the double-walled tube, when on the supply line; a branch-off clip; an electrical conductor suitable for providing shield continuity across a splice between shielded cables; and a clamp that can restrict revolving action of the double-walled tube.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.