Electric heating – Heating devices – With heating unit structure
Patent
1985-10-21
1986-12-30
Griffin, Donald A.
Electric heating
Heating devices
With heating unit structure
H05B 312
Patent
active
046330690
ABSTRACT:
A body comprising a ceramic electrical resistance material of positive temperature coefficient of resistivity adapted to display a sharp increase in resistivity when heated to a selected temperature has passages extending through the body between opposite ends of the body for passing fluid through the passages in heat-exchange relationship to the body and has means electrically contacting spaced-apart portions of the body for directing electrical current through the body to self-heat the body. The body is made with an improved structure in an improved manner and is particularly adapted for use as a self-regulated fluid heater within a small or irregularly-shaped conduit or the like.
REFERENCES:
patent: 4334148 (1982-06-01), Kampe
patent: 4541898 (1985-09-01), Mase et al.
patent: 4544828 (1985-10-01), Shigenobu et al.
Berg Peter G.
Conlan Thomas C.
Kulwicki Bernard M.
Shukla Vishwa
Griffin Donald A.
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
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