US3836698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating sleeve for metallic conduit
Assignee: ABB Installation Products Inc
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Filing: 1973-08-27
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Granted: 1974-09-17
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Expires: 1993-08-27
Abstract
Abstract An insulating sleeve for metallic conduit comprises a selectively slit tubular body member having a circumferentially disposed rib of preferably triangular cross section disposed adjacent a flared end of the body member and proportioned to have a height adjacent the slit portion of the body member somewhat greater than that along the remainder thereof to provide a generally uniform height about the periphery of the body member as the portion of the body member adjacent the slit is overlapped for insertion into the open end of a metallic conduit or the like. The body member is also selectively proportioned to have a thickness adjacent the slit portion thereof somewhat thinner than its thickness diametrically opposite thereto so that the body member may more closely approximate a circular configuration as it is selectively closed upon itself. The body member may be slit in such manner as to provide an interlocking tang and a tang receiving notch, respectively, adjacent the end of the body member remote from the flared end to prevent longitudinal displacement of the slit edges of the sleeve in use.
Inventors
- 👤 J Bawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:49
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
An insulating sleeve for metallic conduit comprising: a tubular body member formed from electrically insulating material and having a first end and a second end, said first end and said second end defining therebetween the length of said body member, there being a selectively formed slit extending the length of said body member to permit said body member to be at least partially closed upon itself for insertion into one end of a metallic conduit, said body member having a wall thickness varying circumferentially from a given minimum wall thickness generally adjacent either side of said slit to a given maximum wall thickness at a point generally diametrically opposite to said slit; a flanged portion extending circumferentially about said first end of said body member; and a selectively formed rib extending generally circumferentially about said body member a predetermined distance from said first end thereof, said rib having a height above the outer surface of said body member generally adjacent said slit which is greater than its height along the remainder of the length of said rib.
Claim 2
Dependent Claim
177 words
An insulating sleeve for metallic conduit comprising: a tubular body member formed from electrically insulating material and having a first end and a second end, said first end and said second end defining therebetween the length of said body member, there being a selectively formed slit extending the length of said body member to permit said body member to be at least partially closed upon itself for insertion into one end of a metallic conduit, said body member having a wall thickness varying circumferentially from a given minimum wall thickness generally adjacent either side of said slit to a given maximum wall thickness at a point generally diametrically opposite to said slit; a flanged portion extending circumferentially about said first end of said body member; and a selectively formed rib extending generally circumferentially about said body member a predetermined distance from said first end thereof, said rib having a height above the outer surface of said body member generally adjacent said slit which is greater than its height along the remainder of the length of said rib.
Claim 3
Dependent Claim
43 words
An insulating sleeve as defined in claim 1 wherein said rib terminates in ends spaced a predetermined distance from either side of said slit to provide a rib-less zone thereat to permit said body member to be smoothly over-lapped at said rib-less zone.
Claim 4
Dependent Claim
49 words
An insulating sleeve as defined in claim 1 wherein said slit extends circumferentially through a first given arc and then longitudinally a first given distance adjacent said second end of said body member to provide a tang and a tang receiving notch, respectively, adjacent said body member second end.
Claim 5
Dependent Claim
17 words
An insulating sleeve as defined in claim 1 wherein said rib has a generally triangular cross section.
Claim 6
Dependent Claim
17 words
An insulating sleeve as defined in claim 1 wherein said rib has a generally saw-tooth cross section.
Claim 7
Dependent Claim
17 words
An insulating sleeve as defined in claim 1 wherein said rib extends contiguously along its entire length.
Claim 8
Dependent Claim
17 words
An insulating sleeve as defined in claim 1 wherein said rib comprises a plurality of disconnected segments.
Claim 9
Dependent Claim
48 words
An insulating sleeve as defined in claim 1 wherein the maximum rib height generally adjacent said slit is greater than the rib height along the remainder of the length of said rib by an amount generally equal to the thickness of said body member generally adjacent said slit.
Claim 10
Dependent Claim
32 words
An insulating sleeve as defined in claim 1 wherein said body member given maximum wall thickness is at least approximately 50 per cent greater than said body member given minimum wall thickness.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |