US 11,943,844 B2
Modular fluid heater utilizing electrothermal polymer coatings
Robert C. Nelson, Woodinville, WA (US); John H. Laakso, Normandy Park, WA (US); Andrew Jackson Hedgcock, IV, Kirkland, WA (US); and Michael D. Ross, Mercer Island, WA (US)
Assigned to HUMBAY, INC., Kirkland, WA (US)
Filed by HUMBAY, INC., Kirkland, WA (US)
Filed on Mar. 5, 2021, as Appl. No. 17/193,448.
Claims priority of provisional application 62/986,533, filed on Mar. 6, 2020.
Prior Publication US 2021/0282231 A1, Sep. 9, 2021
Int. Cl. H05B 1/02 (2006.01); H05B 3/14 (2006.01); H05B 3/48 (2006.01)
CPC H05B 1/0297 (2013.01) [H05B 3/146 (2013.01); H05B 3/48 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A fluid heating element, comprising:
a first conduit comprising a first inlet and a first outlet, the first inlet being configured to receive a first portion of the fluid, the first outlet being configured to discharge the first portion of the fluid;
a second conduit comprising a second inlet and a second outlet, the second inlet being configured to receive a second portion of the fluid, the second outlet being configured to discharge the second portion of the fluid;
a web extending laterally between the first and second conduits;
an electrothermal coating associated with the first and second conduits; and
an electrical lead configured to apply an electric current across the electrothermal coating, wherein the electrothermal coating converts the electric current to heat that is transferred to the first and second conduits to the fluid.