US 12,072,053 B2
Watertight electrical conduit
John Robert William West, Ipswich (GB); Andrea Ticci, Ipswich (GB); and Paul Ridge, Suffolk (GB)
Assigned to Franklin Electric Co., Inc., Fort Wayne, IN (US)
Filed by FRANKLIN FUELING SYSTEMS, LLC, Madison, WI (US)
Filed on Jul. 27, 2018, as Appl. No. 16/047,924.
Claims priority of provisional application 62/616,400, filed on Jan. 11, 2018.
Prior Publication US 2019/0211948 A1, Jul. 11, 2019
Int. Cl. F16L 5/02 (2006.01); B29C 65/00 (2006.01); B29C 65/34 (2006.01); F16L 9/147 (2006.01); F16L 13/02 (2006.01); F16L 47/02 (2006.01); F16L 47/03 (2006.01); F16L 47/24 (2006.01); F16L 47/30 (2006.01); F16L 58/10 (2006.01); H02G 3/02 (2006.01); H02G 3/04 (2006.01); H02G 9/06 (2006.01); H02G 9/10 (2006.01)
CPC F16L 5/022 (2013.01) [B29C 65/348 (2013.01); B29C 66/131 (2013.01); F16L 9/147 (2013.01); F16L 13/0272 (2013.01); F16L 47/02 (2013.01); F16L 47/03 (2013.01); F16L 47/24 (2013.01); F16L 47/30 (2013.01); F16L 58/1054 (2013.01); F16L 58/109 (2013.01); H02G 3/02 (2013.01); H02G 3/0481 (2013.01); H02G 9/06 (2013.01); H02G 9/10 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A fueling system, comprising:
a first underground fueling component;
a second underground fueling component; and
an underground conduit extending from the first underground fueling component to the second underground fueling component, the underground conduit comprising:
a metal pipe having a radially interior wall surface defining an interior passageway, the metal pipe further having a radially exterior wall surface and a longitudinal pipe wall defined between the radially interior wall surface and the radially exterior wall surface;
a first electrofusable section having a radially interior wall surface facing said radially exterior wall surface of said metal pipe, the radially interior wall surface of the first electrofusable section secured to the radially exterior wall surface of said metal pipe by at least one of:
overmolding the radially interior wall surface of the first electrofusable section onto the radially exterior wall surface of the metal pipe, and
friction fitting the radially interior wall surface of the first electrofusable section onto the radially exterior wall surface of the metal pipe;
said first electrofusable section having a first terminal end and an opposing second terminal end, said first electrofusable section formed of a plastic, said first electrofusable section positioned over an intermediate area of said metal pipe, said radially exterior wall surface of said metal pipe extending at a substantially constant diameter beyond said first terminal end of said first electrofusable section and at the substantially constant diameter beyond said opposing second terminal end of said first electrofusable section;
wherein the underground conduit further comprises a corrosion resistant section comprising a polymer layer extending over said metal pipe, said polymer layer and said first electrofusable section cooperating to provide an exterior corrosion resistant coating to the conduit; and
wherein the plastic forming said first electrofusable section comprises a polymer having a higher density than said corrosion resistant section.