IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0236763
(2008-09-24)
|
등록번호 |
US-8167338
(2012-05-01)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
89 |
초록
▼
A continuous, non-metallic conduit for conductors, such as electrical wiring and/or fiber optic cable. The continuous conduit being formed from at least one pair of first and second conduits having enlarged ends coupled together. The enlarged ends are belled or otherwise have a diameter greater than
A continuous, non-metallic conduit for conductors, such as electrical wiring and/or fiber optic cable. The continuous conduit being formed from at least one pair of first and second conduits having enlarged ends coupled together. The enlarged ends are belled or otherwise have a diameter greater than that of the straight run (non-belled) portions of the conduit. The enlarged ends of the conduit being coupled together by fusion or welding, and an internal bead or ridge being formed by the coupling process. The enlarged ends are dimensioned such that the internal bead or ridge formed at the junction between the two enlarged ends does not project radially inward to a position equal to or less than the diameter of the straight run portion of the conduits. The continuous conduit is configured to allow the conductor to be passed therethrough such that the conductor does not contact the internal bead or ridge.
대표청구항
▼
1. A non-metallic raceway configured to facilitate passage of a conductor comprising: at least one pair of non-metallic hollow conduits, including a first non-metallic conduit and a second non-metallic conduit,the first and second non-metallic hollow conduits each having:a first belled end portion h
1. A non-metallic raceway configured to facilitate passage of a conductor comprising: at least one pair of non-metallic hollow conduits, including a first non-metallic conduit and a second non-metallic conduit,the first and second non-metallic hollow conduits each having:a first belled end portion having belled inner and outer surfaces, the first belled end portion having a first inner diameter at an end thereof,a second belled end portion having belled inner and outer surfaces, the second belled end portion having the first inner diameter at an end thereof, anda cylindrical portion between the first and second belled end portions and with a second inner diameter,the first inner diameter being greater than the second inner diameter,the pair of non-metallic hollow conduits being fused together at respective ends of the first belled end portions to form a fused portion, the fused portion including an internal ridge and an external ridge, and the internal ridge having a third inner diameter, the pair of fused together conduits having uncovered outer surface portions of the cylindrical portions and an entire outer surface of the fused portion that is uncovered,the third inner diameter being greater than the second inner diameter and less than the first inner diameter, andthe first, second, and third inner diameters being sized such that a conductor passed through the raceway does not contact the internal ridge,wherein the internal ridge extends inwardly more than the external ridge extends outwardly. 2. The non-metallic raceway of claim 1, further comprising a plurality of said pairs of non-metallic hollow conduits. 3. The non-metallic raceway of claim 1, wherein the first and the second non-metallic hollow conduits comprise polyethylene. 4. The non-metallic raceway of claim 1, wherein the first and the second non-metallic hollow conduits comprise polyvinylchloride (“PVC”). 5. A method of forming a continuous conduit from a first hollow conduit and a second hollow conduit comprising: positioning a bell-shaped end portion of the first hollow conduit adjacent a bell-shaped end portion of the second hollow conduit such that respective circumferences of ends of the hollow conduits are substantially axially aligned, each of said bell-shaped end portions having belled inner and outer surfaces; andsubstantially permanently fusing the positioned and aligned bell-shaped end portions together to form a fuse joint at the ends of the bell-shaped end portions,said substantially permanently fusing forming an internal protrusion at the fuse joint, the internal protrusion protruding substantially radially inward,the internal protrusion extending inwardly to an inner diameter greater than that of non-belled portions of the first hollow conduit and the second hollow conduit, andthe substantially permanently fused first and second hollow conduits forming the continuous conduit have exposed outer surface portions of the non-belled portions and an entire outer surface of the fuse joint that is exposed and are configured so as to prevent a conductor passed through the continuous conduit from contacting the internal protrusion,wherein said substantially permanently fusing forms an external protrusion at the fuse joint, the external protrusion protruding substantially radially outward,wherein the method further comprises forming the external protrusion after said substantially permanently fusing, andwherein said forming the external protrusion includes reducing the external protrusion. 6. The method of claim 5, further comprising: forming the bell-shaped end portion of the first hollow conduit;forming a second bell-shaped end portion of the first hollow conduit;forming the bell-shaped end portion of the second hollow conduit; andforming a second bell-shaped end portion of the second hollow conduit. 7. The method of claim 5, further comprising: traversing the continuous conduit through a man-made cavity; andtraversing a conductor along an inside of the continuous conduit such that the conductor does not contact the internal protrusion. 8. A method of forming a continuous conduit from a first hollow conduit and a second hollow conduit comprising: positioning a bell-shaped end portion of the first hollow conduit adjacent a bell-shaped end portion of the second hollow conduit such that respective circumferences of ends of the hollow conduits are substantially axially aligned, each of said bell-shaped end portions having belled inner and outer surfaces; andsubstantially permanently fusing the positioned and aligned bell-shaped end portions together to form a fuse joint at the ends of the bell-shaped end portions,said substantially permanently fusing forming an internal protrusion at the fuse joint, the internal protrusion protruding substantially radially inward,the internal protrusion extending inwardly to an inner diameter greater than that of non-belled portions of the first hollow conduit and the second hollow conduit, andthe substantially permanently fused first and second hollow conduits forming the continuous conduit have exposed outer surface portions of the non-belled portions and an entire outer surface of the fuse joint that is exposed and are configured so as to prevent a conductor passed through the continuous conduit from contacting the internal protrusion,wherein said substantially permanently fusing forms an external protrusion at the fuse joint, the external protrusion protruding substantially radially outward,wherein the method further comprises forming the external protrusion after said substantially permanently fusing, andwherein said forming the external protrusion includes substantially removing the external protrusion. 9. The method of claim 8, further comprising: forming the bell-shaped end portion of the first hollow conduit;forming a second bell-shaped end portion of the first hollow conduit;forming the bell-shaped end portion of the second hollow conduit; andforming a second bell-shaped end portion of the second hollow conduit. 10. The method of claim 8, further comprising: traversing the continuous conduit through a man-made cavity; andtraversing a conductor along an inside of the continuous conduit such that the conductor does not contact the internal protrusion.
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