Heated roof drainage raceway with self adjusting heating cable cavity
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E04D-013/04
E04D-013/076
E04D-013/10
H05B-003/30
H05B-003/56
H05B-003/26
출원번호
US-0145637
(2013-12-31)
등록번호
US-9428915
(2016-08-30)
발명자
/ 주소
Nark, Malcolm Brent
출원인 / 주소
Nark, Malcolm Brent
인용정보
피인용 횟수 :
0인용 특허 :
29
초록▼
If roof top snow melt water is allowed to refreeze on the colder areas of the roof, an ice dam can be formed. A heated drainage path ensures this water is drained away from the structure's foundation. The various sheet metal raceway products disclosed contain spring-like folded members to securely p
If roof top snow melt water is allowed to refreeze on the colder areas of the roof, an ice dam can be formed. A heated drainage path ensures this water is drained away from the structure's foundation. The various sheet metal raceway products disclosed contain spring-like folded members to securely press against the self-regulating heating cable, thereby maximizing the thermal conduction between the heating cable and the sheet metal raceways. The spring-like members of the raceways ensure a tight thermal contact to heating cables of different thicknesses. The spring-like members compensate for metal fatigue to provide a longer useful life of the installed system. The system also allows easy end of life replacement of the heating cable.
대표청구항▼
1. A heated continuous roof drainage raceway system with at least one run of self-regulating heating cable for high snow and ice load regions, wherein the raceway is formed by a multi-segment, bellows-like spring member and a thermally conductive base, the spring member, pressing the heating cable a
1. A heated continuous roof drainage raceway system with at least one run of self-regulating heating cable for high snow and ice load regions, wherein the raceway is formed by a multi-segment, bellows-like spring member and a thermally conductive base, the spring member, pressing the heating cable against the thermally conductive base, consisting of a strip portion extending along a first side of a substantially rectangular panel, having at least two bends which form at least two overlapping parallel strip segments;said spring member creating a flexible retention system providing a constant pressure on the heating cable, without damaging the heating cable, thereby minimizing any air gap between the heating cable and the thermally conductive base, and maximizing the heat transfer to the thermally conductive base. 2. The heated continuous roof drainage raceway system of claim 1, wherein an overhanging metal drip edge of a metal roof, with an underside, is the thermally conductive base, and the spring member presses the heating cable against the underside of the overhanging metal drip edge; along a side of the panel opposite the first side, the spring member has a flange that can be attached with screws to a fascia below the drip edge, creating a two part open sided raceway, open in a direction away from the fascia, exposing the edge of the heating cable;said spring member forcing the heating cable to follow a waviness or oil canning of the drip edge underside, creating a tight raceway for the cable which maximizes the heat transfer from the heat cable to the underside of the metal roof drip edge;heat energy generated by the heating cable thereby traveling up the metal roof to keep it free of ice dams and create a continuous heated melt path along the drip edge to drain water under a snow layer. 3. The heated continuous roof drainage raceway system of claim 1, wherein the panel or the thermally conductive base is made from copper, steel or aluminum sheet metal, and the spring member is formed by bending the material on a brake or a roll forming machine, or from a plastic that is extruded. 4. The heated continuous roof drainage raceway system of claim 1, wherein the base comprises a thermally conductive metal slip sheet or snow slide extending up a shingled roof a distance of about one to four rows of shingles and inserted under a shingle row, wrapping around a roof drip edge and extending down along a fascia just below the drip edge, on shingled or composite roofs that are not thermally conductive. 5. The heated continuous roof drainage raceway system of claim 1, wherein the thermally conductive base is a strip of the panel adjacent to the spring member, bent so as to form a front or rear loaded J-hook one piece raceway with the spring member pressing the self-regulating heating cable against the base, which forms an opposite side of the raceway; the panel being about one to two feet high and held in place under the second, third, or fourth row of shingles, the panel covering respectively the first row of shingles, or the first two, or first three rows of shingles, at the roof edge. 6. The heated continuous roof drainage raceway system of claim 5, wherein the raceway system is secured at locations under the second, third, or fourth row of shingles with attachment screws or nails or glued; or the raceway system is secured by transition panels extending from a top side of the roof edge, around the roof edge and raceway system, under the roof edge to, and then down along, a fascia under the roof edge, with a drain hole proximate the roof edge, each transition panel placed so as to overlap and secure two adjacent ends of two adjacent front or rear loaded J-hook panels, and fastened at least to the fascia under the roof drip edge;an inside radius of the transition panel fitting snugly over an outside radius of the J-hook panels and covering a drainage gap between adjacent front or rear loaded J-hook panels. 7. The heated continuous roof drainage raceway system of claim 1, wherein for additional up-roof heating of a shingled or tile roof, the top few inches of additional flat panels can be placed under shingles or tiles higher on the roof, and held in place with screws, nails or glue. 8. The heated continuous roof drainage raceway system of claim 5, wherein the front or rear loaded J-hook one piece raceway is secured to a metal roof by a portion of the panel opposite the spring member, the portion being a few inches to two feet high and, said portion of the panel being slid and secured under an edge of a corrugated, rib panel, or raised seam type metal roof. 9. The heated continuous roof drainage raceway system of claim 8, wherein the raceway system is secured in place with existing roof fasteners near the roof drip edge; or the raceway system is secured by transition panels extending from a top side of the roof edge, around and under the roof edge and raceway system to, and then down along, a fascia under the roof edge, with a drain hole proximate the roof edge, each transition panel placed so as to overlap and secure two adjacent ends of a two adjacent front or rear loaded J-hook panels, and fastened at least to the fascia under the roof drip edge;an inside radius of the transition panel fitting snugly over an outside radius of the J-hook panels and covering a drainage gap between adjacent front or rear loaded J-hook panels. 10. The heated continuous roof drainage raceway system of claim 5, wherein the front loaded J-hook raceway forms a one piece, open-sided raceway, open in a direction away from the fascia, exposing the edge of the heating cable, and the rear loaded J-hook raceway forms a one piece, open-sided raceway, open in a direction toward the fascia. 11. The heated continuous roof drainage raceway system of claim 3, wherein for thick dimensioned shingles or tile roofs the slip sheet can be sized to cover only the first row of shingles. 12. The heated continuous roof drainage raceway system of claim 1, wherein a one piece raceway is formed wide enough to hold at least one self-regulating heating cable run, allowing use on roof valleys, and as flashing at vertical protrusions from the roof. 13. The panel recited in claim 12, wherein the panel is formed with a right angle vertical member designed to be used as a flashing sealed to chimneys, dormers or second stories. 14. The heated continuous roof drainage raceway system of claim 1, comprising a multi-component system that provides a heated snow melt water drainage raceway on a top surface of a raised seam metal roof wherein, a combination of a threaded bolt holding a padded cable loop to a seam clamp which is attached to a raised seam on an exterior metal roof surface, securely holding a top loop of the self-regulating heating cable and preventing sliding snow and ice from dislodging the heating cable from the exterior surface of the roof;a rounded rectangle shaped heating cable lying flat against the top surface of the metal roof which constitutes the thermally conductive metal base;the cable thus seated in a three sided raceway formed by the metal roof surface, the raised seam and a modified inverted spring member;the parts of this raceway system being held in place by a seam clamp that may have rounded inside corners to provide additional clamping strength while minimizing material usage, and a set screw;the clamp's set screw securing the spring member or members to an exterior raised seam of the roof, with the heating cable in firm, thermally conductive contact with an exterior flat metal surface of the roof adjacent the seam, providing a heated drainage path for snow melt water. 15. The heated continuous roof drainage raceway system of claim 14, wherein the raceway is installed on only one side of the raised seam, crossing over to a next seam at the top and bottom of a self-regulating heating cable run. 16. The heated continuous roof drainage raceway system of claim 14, further comprising a two part sheet metal panel, each panel with a vertical member, forming a raised seam wherein, along a seam length, one part presents a folded over cavity which the other part slides into, creating a raised seam flashing that can be placed at various exterior locations on a roof and heated to provide a heated drain path for snow melt water. 17. The heated continuous roof drainage raceway system of claim 16, wherein outer edges of the two part sheet metal panel can be mounted under shingles and held in place with fasteners or adhesive. 18. The heated continuous roof drainage raceway system of claim 16, wherein outer edges of the two part sheet metal panel can be bent vertical upward allowing the raceway to be sealed against vertical protrusions from a roof associated with a chimney, dormer or second story.
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이 특허에 인용된 특허 (29)
Bench,Steven D., De-icing, snow melting and warming system.
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