Patent US5446242A successfully refreshed from Google Patents.
US5446242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulator
Assignee: Tyco Electronics UK Ltd
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Filing: 1992-05-22
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Granted: 1995-08-29
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Expires: 2012-05-22
Abstract
Abstract A generally-planar polymeric protective shield (2) for mounting on a high voltage porcelain insulator (16) has circumferential and radial intersecting grooves (8,10) in its upper surface. The intersections are deepened to provide point projections (12) from the lower surface thereby to space the major portion of the shield (2) from the insulator (16). The convoluted upper surface of the shield (2) enhances the physical protection of the porcelain of the insulator (16).
Inventors
- 👤 Donald C. Barrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:20
CPC Classifications
H; H01; H01B; H01B17/00; H01B17/42; H01B17/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
121 words
An electrically insulating and substantially non-tracking generally planar member suitable for mounting on a shedded elongate porcelain high-voltage insulator, the member being of annular configuration and being arranged for mounting aruond and spaced apart from a core of the insulator and for mounting over and spaced apart from a shed of the insulator, wherein an upper surface of the member has channels formed therein, each of said channels having an upper channel surface and a lower channel surface, said lower channel surface extending downwardly from a lower surface of the planar member, a plurality of projections extending downwardly from said lower surface being provided by the intersection of said channels, said projections, in use, contacting the porcelain shed of the insulator.
Claim 2
Dependent Claim
121 words
An electrically insulating and substantially non-tracking generally planar member suitable for mounting on a shedded elongate porcelain high-voltage insulator, the member being of annular configuration and being arranged for mounting aruond and spaced apart from a core of the insulator and for mounting over and spaced apart from a shed of the insulator, wherein an upper surface of the member has channels formed therein, each of said channels having an upper channel surface and a lower channel surface, said lower channel surface extending downwardly from a lower surface of the planar member, a plurality of projections extending downwardly from said lower surface being provided by the intersection of said channels, said projections, in use, contacting the porcelain shed of the insulator.
Claim 3
Dependent Claim
33 words
A planar member according to claim 1, wherein the channels are provided by at least one channel extending generally circumferentially of the annular member and at least one channel extending generally radially thereof.
Claim 4
Dependent Claim
33 words
A planar member according to claim 1 in which the intersections of the channels are deeper than the other portions of the channels, such that the projections extend substantially in only one direction.
Claim 5
Dependent Claim
33 words
A planar member according to claim 1, having a plurality of inwardly directed extensions at its inner peripheral surface whereby in operation the member is spaced radially from the core of the insulator.
Claim 6
Dependent Claim
28 words
A planar member according to claim 1, wherein the channels provide indulations in the surface of the member that extend in two directions, preferably perpendicular to each other.
Claim 7
Dependent Claim
28 words
A planar member according to claim 1, the member being of wraparound configuration and having means to close the annular member together along adjacent edges around the insulator.
Claim 8
Dependent Claim
46 words
A planar member according to claim 6, wherein the closure means comprises at least one projection extending from one edge and at least one aperture at the other edge, whereby the projection and aperture are interengageable so as to secure the planar member to the insulator.
Claim 9
Dependent Claim
11 words
A planar member according to claim 1, made from polymeric material.
Claim 10
Dependent Claim
17 words
A planar member according to claim 1, wherein the planar member is a vacuum formed planar member.
Claim 11
Dependent Claim
33 words
A porcelain insulator that comprises an elongate core and at least one shed extending radially therefrom, wherein a planar member in accordance with claim 1 is mounted on said at least one shed.
Claim 12
Dependent Claim
29 words
An insulator according to claim 10, wherein the insulator comprises a plurality of said sheds and wherein one of the planar members is mounted on each of the sheds.
Claim 13
Dependent Claim
21 words
A planar member according to claim 2, wherein the channels are provided by at least two channels extending generally radially thereof.
References Cited (Backward Citations)
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DE679220C
Cited
US3192312A
Cited
US4053707A
Cited
GB1542845A
Cited
EP0328365A2
Cited
DD283009A5
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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) | 1998-08-28 | 1999-02-27 | 1999-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-28 | 2003-02-27 | 2003-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-28 | 2007-02-27 | 2007-08-29 | $7700.00 | Window Closed / Lapsed |