Patent ID: 8380056

Claim:
An inter-axial inline fluid heater comprising: an outer retaining sheath defining a first area, said outer retaining sheath having a first end and a second end; an interior flow tube, comprised of a first material, disposed within said outer sheath and capable of having fluid flow therethrough, said interior flow tube having a first end extending beyond said first end of said outer retaining sheath, said interior flow tube having a second end extending beyond said second end of said outer retaining sheath; a resistance wire having a first power lead at a first end and a second power lead at a second end thereof, said resistance wire disposed between said interior flow tube and said outer retaining sheath, said resistance wire displaced away from said interior flow tube and said outer retaining sheath, said resistance wire capable of producing heat for heating a fluid passing through said interior flow tube when power is applied to said resistance wire; and a castable dielectric heat transfer material comprised of a castable second material different from said first material, disposed between said interior flow tube and said outer retaining sheath and surrounding said resistance wire, wherein said dielectric heat transfer material fills a space between said interior flow tube, said resistance wire, and said outer retaining sheath and is in contact with said resistance wire, said interior flow tube and said outer retaining sheath.