David L Rissanen

US Patent:

50055429, Apr 9, 1991

Filed:

Jan 2, 1990

Appl. No.:

7/459465

Inventors:

David Rissanen - Big Falls MN

International Classification:

F02N 1702

US Classification:

1231425R

Abstract:

An engine preheating device for heating internal combustion engines prior to operation utilizes a propane torch and conventional propane supply tank. A hollow cylindrical housing is supported in upright orientation by a plurality of circumferentially spaced support legs. A helical heat exchanger coil is disposed in coaxial relation within the housing. An inlet conduit is coupled to a bottom end of the coil and an outlet conduit is coupled to an upper end of the coil. Quick connect couplings secure the inlet and outlet conduits to a water jacket of an internal combustion engine. An arcuate tubular elbow has a first end mounted in coaxial relation within the bottom end of the housing. A propane torch head is inserted within the elbow and is connected by a conduit to a propane supply tank. A flame diffuser is suspended within the coil by a tube connected to a top cover.