EP0210061A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Lubrication system
Assignee: Raychem Corp
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Filing: 1986-07-18
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Granted: —
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Expires: 2006-07-18
Abstract
Abstract A friction-reducing non-newtonian liquid having a shear gradient is provided between the walls of a double walled article, attowing the article to be applied over substrates having sharp or large transisti]ons in size. The rheological properties of the liquid ensure that shear will occur between the two walls, and need not occur between either wall and the substrate.
Inventors
- 👤 Peter Lars Larsson
- 👤 A. Jeffrey Bennett
- 👤 Neil Lawrence Holt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:55
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; F; F16; F16L; 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; H02G15/013
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
82 words
An article comprising: a double wall; and a friction-reducing means between the two walls of the double wall and comprising a non-newtonian liquid having a viscosity at a shear rate of 1 reciprocal second that is greater than 5 times the viscosity at a shear rate of 100 reciprocal seconds; the article being capable of being applied to a substrate by relative sliding motion between the two walls substantially without relative sliding motion between a wall adjacent the substrate and the substrate.
Claim 2
Dependent Claim
82 words
An article comprising: a double wall; and a friction-reducing means between the two walls of the double wall and comprising a non-newtonian liquid having a viscosity at a shear rate of 1 reciprocal second that is greater than 5 times the viscosity at a shear rate of 100 reciprocal seconds; the article being capable of being applied to a substrate by relative sliding motion between the two walls substantially without relative sliding motion between a wall adjacent the substrate and the substrate.
Claim 3
Dependent Claim
35 words
An article according to claim 1, in which the liquid has a viscosity at a shear rate of 1 reciprocal second greater than 10 times the viscosity at a shear rate of 100 reciprocal seconds.
Claim 4
Dependent Claim
33 words
An article according to claim 1 or 2, in which the liquid has a viscosity of less than 20,000 centipoise at 20°C and at a shear rate of greater than 100 reciprocal seconds.
Claim 5
Dependent Claim
31 words
An article according to claim 3, in which the liquid has a viscosity of less than 5,000 centipoise at 20°C and at a shear rate of greater than 500 reciprocal seconds.
Claim 6
Dependent Claim
28 words
An article according to any preceding claim, in which the liquid wets an interior surface of one or both walls at a dihedral angle of less than 80°.
Claim 7
Dependent Claim
13 words
An article according to any preceding claim, in which the liquid exhibits pituity.
Claim 8
Dependent Claim
35 words
An article according to claim 6, in which the liquid has an Fp value (as herein defined) of at least 1. 5 g and/or an E value (as herein defined) of at least 5 g.s.
Claim 9
Dependent Claim
26 words
An article according to any preceding claim, in which the friction-reducing means is capable of maintaining lubrication under a pressure gradient of 27 kPa per cm.
Claim 10
Dependent Claim
21 words
An article according to any preceding claim, in which the liquid comprises a dilute solution of a high molecular weight polymer.
Claim 11
Dependent Claim
20 words
10 An article according to claim 9, in which the molecular weight of the polymer is greater than 2 million.
Claim 12
Dependent Claim
24 words
An article according to claim 9 or 10, in which the concentration of the high molecular weight polymer is less than 5% by weight.
Claim 13
Dependent Claim
28 words
An article according to claim 9, in which the molecular weight of the polymer is greater than 4 million, and its concentration is less than 1% by weight.
Claim 14
Dependent Claim
22 words
An article according to any preceding claim, in which the liquid has a boiling point at 1 bar of at least 130°C.
Claim 15
Dependent Claim
26 words
An article according to any preceding claim, in which said liquid comprises a continuous phase and a dispersed phase stabilized by a gelling or solubilizing agent.
Claim 16
Dependent Claim
28 words
An article according to any preceding claim, in which the liquid comprises a polyhydric alcohol, a silicone oil, a hydrocarbon oil, a mineral oil, or a vegetable oil.
Claim 17
Dependent Claim
26 words
An article according to any preceding claim, comprising a dispersed phase comprising a polyarylate, a polymethacrylate, a polyacrylamide or a cellulose derivative, and a continuous phase.
Claim 18
Dependent Claim
24 words
An article according to any preceding claim, in which the average separation between the two is less than 10 times the average wall thickness.
Claim 19
Dependent Claim
16 words
An article according to any preceding claim, in which the double wall comprises an elastomeric material.
Claim 20
Dependent Claim
25 words
An article according to any preceding claim, having the form of a double-walled tube, the double wall defining a closed region between its two walls.
Claim 21
Dependent Claim
28 words
An article according to any preceding claim, in which the double wall together with the friction-reducing means has an electrical strength of at least 50 kV per cm.
Claim 22
Dependent Claim
57 words
An article according to any preceding claim, in which the article is applied to the substrate over an end thereof by engaging one wall of the double wall and the substrate, and applying an axial compressive force between the substrate and the outer wall at a position less than 7 cm from said end of the substrate.
Claim 23
Dependent Claim
55 words
A kit of parts which comprises at least one double-walled tube having a closeable region between its two walls, and a friction-reducing means comprising a non-newtonian liquid having a viscosity at a shear rate of 1 reciprocal second greater than or equal to 10 times the viscosity at a shear rate of 100 reciprocal seconds.
Claim 24
Dependent Claim
55 words
A kit of parts which comprises at least one double-walled tube having a closeable region between its two walls, and a friction-reducing means comprising a non-newtonian liquid having a viscosity at a shear rate of 1 reciprocal second greater than or equal to 10 times the viscosity at a shear rate of 100 reciprocal seconds.
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