Patent US4833278A successfully refreshed from Google Patents.
US4833278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulator housing made from polymeric materials and having spirally arranged inner sheds and water sheds
Assignee: Hydro-Québec
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Filing: 1988-10-31
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Granted: 1989-05-23
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Expires: 2008-10-31
Abstract
Abstract An insulator housing comprising a resin bonded fibre tube carrying water repellent, spirally arranged inner sheds and water sheds made from strips of polymeric material provides improved outdoor electrical insulation. The insulator housing provides greater insulation performance per unit length of housing than prior art structures.
Inventors
- 👤 Peter Lambeth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:08
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/52; H01B17/525
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
102 words
An insulator housing comprising: (a) a resin bonded fibre tube having upper and lower ends; (b) at least one set of inner sheds made up of strips of insulating, water repellent material attached around the tube in a spiral arrangement; (c) at least one set of water sheds made up from strips of insulating, water repellent material attached around the tube in a spiral arrangement substantialy parallel to, and outside, the inner shed spiral arrangement, the water sheds extending obliquely downwards and outwards from the tube to form a continuous downward sloping surface, so as to shield the inner sheds from precipitation.
Claim 2
Dependent Claim
102 words
An insulator housing comprising: (a) a resin bonded fibre tube having upper and lower ends; (b) at least one set of inner sheds made up of strips of insulating, water repellent material attached around the tube in a spiral arrangement; (c) at least one set of water sheds made up from strips of insulating, water repellent material attached around the tube in a spiral arrangement substantialy parallel to, and outside, the inner shed spiral arrangement, the water sheds extending obliquely downwards and outwards from the tube to form a continuous downward sloping surface, so as to shield the inner sheds from precipitation.
Claim 3
Dependent Claim
20 words
A housing according to claim 1, additionally comprising: a conducting corona shield attached to the upper end of the tube.
Claim 4
Dependent Claim
18 words
A housing according to claim 1, wherein the tube is tapered to be wider at its upper end.
Claim 5
Dependent Claim
24 words
A housing according to claim 1, wherein the tube has flanges at both ends to allow fixation of either end to a flat surface.
Claim 6
Dependent Claim
46 words
A housing according to claim 4, additionally comprising: a second tube identical to said first-mentioned tube, the flange at one end of said second tube being affixed to the flange at one end of the other tube such that the tubes are fixed end to end.
Claim 7
Dependent Claim
21 words
A housing according to claim 1, wherein two or more sets of inner sheds are arranged in a multi-start spiral arrangement.
Claim 8
Dependent Claim
19 words
A housing according to claim 1, wherein a lower portion of each strip of inner shed material is slotted.
Claim 9
Dependent Claim
25 words
A housing according to claim 1, wherein both the inner and water sheds are attached to the tube on ribs affixed spirally around the tube.
Claim 10
Dependent Claim
16 words
A housing according to claim 8, wherein the ribs comprise solid rods of resin bonded fibre.
Claim 11
Dependent Claim
35 words
A housing according to claim 9, wherein the inner sheds are attached to the ribs by securing means passing through regularly spaced holes in an upper portion of the inner sheds and into said ribs.
Claim 12
Dependent Claim
23 words
A housing according to claim 10, wherein the water sheds are attached to angled brackets themselves attached by securing means to said ribs.
Claim 13
Dependent Claim
16 words
A housing according to claim 11, wherein said resin bonded fibre is resin bonded glass fibre.
Claim 14
Dependent Claim
21 words
A housing according to claim 8, wherein the ribs comprise spiral strips of resin bonded fibre affixed spirally around said tube.
Claim 15
Dependent Claim
39 words
A housing according to claim 13, wherein said ribs contain a continuous element of electrically resistive material, said element having a first end and a second end each electrically connected to respective flanges on either end of said tube.
Claim 16
Dependent Claim
47 words
A housing according to claim 14, wherein both of said inner and water sheds are attached to said tube using a silicone rubber extrusion having retaining slots in which said sheds are inserted and held, and having pegs inserted in between adjacent whorls of said spiral strips.
Claim 17
Dependent Claim
16 words
A housing according to claim 15, wherein said resin bonded fibre is resin bonded glass fibre.
Claim 18
Dependent Claim
16 words
A housing according to claim 14, wherein said resin bonded fibre is resin bonded glass fibre.
Claim 19
Dependent Claim
16 words
A housing according to claim 13, wherein said resin bonded fibre is resin bonded glass fibre.
Claim 20
Dependent Claim
16 words
A housing according to claim 8, wherein said resin bonded fibre is resin bonded glass fibre.
Claim 21
Dependent Claim
22 words
A housing according to claim 1, wherein the water sheds are attached to angled brackets attached by securing means to said tube.
Claim 22
Dependent Claim
33 words
A housing according to claim 1, wherein said strips of material forming the water sheds are attached to each other by securing means passing through holes in overlapping regions of said water sheds.
Claim 23
Dependent Claim
36 words
A housing according to claim 1, wherein at least two sets of inner sheds are attached to said tube and wherein spacers are used at attachment points to maintain a gap between said inner shed sets.
Claim 24
Dependent Claim
15 words
A housing according to claim 22, wherein said spacers are strips of insulating polymeric material.
Claim 25
Dependent Claim
23 words
A housing according to claim 23, wherein said insulating polymeric material is selected from the group consisting of polypropylene, PTFE and silicone rubber.
Claim 26
Dependent Claim
53 words
A housing according to claim 1, having an innermost set of inner sheds and at least one other set of inner sheds, wherein the innermost set of inner sheds is attached at two points, one above the other, to create a partially sealed volume between said innermost inner shed set and said tube.
Claim 27
Dependent Claim
22 words
A housing according to claim 1, wherein said water repellent material is selected from the group consisting of PTFE and silicone rubber.
Claim 28
Dependent Claim
13 words
A housing according to claim 1, wherein said inner shed material is PTFE.
Claim 29
Dependent Claim
16 words
A housing according to claim 1, wherein said resin bonded fibre is resin bonded glass fibre.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-22 | 1992-11-21 | 1993-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-22 | 1996-11-21 | 1997-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-22 | 2000-11-21 | 2001-05-23 | $7700.00 | Window Closed / Lapsed |