Screw plug immersion heater comprising separate header and threa

Details Screw plug immersion heater comprising separate header and threa Screw plug immersion heater comprising separate header and threa

1991-01-11

1993-03-02

Reynolds, Bruce A.

Electric resistance heating devices

Heating devices

Immersion heater details

H05B 378

Patent

active

051916347

ABSTRACT:
An immersion heater having a screw plug formed from header and sleeve parts. The header part comprises a stamped, thin sheet of metal having a plurality of holes for the heating elements to extend through and a portion of hexagonal configuration to be gripped by a tool. The sleeve part is a threaded piece of pipe to be screwed into the wall of a fluid-containing vessel. The header and sleeve parts are welded together to form the assembled screw plug.

REFERENCES:
patent: 1797712 (1931-03-01), Brodnax et al.
patent: 2039641 (1936-05-01), Fichtner
patent: 2223969 (1940-12-01), Siegler
patent: 2251556 (1941-08-01), Siegler
patent: 2479587 (1949-08-01), Morris et al.
patent: 2606271 (1952-08-01), Morris
patent: 2611066 (1952-09-01), Freeman
patent: 3319049 (1967-05-01), Ulanet
patent: 4253009 (1981-02-01), Jordan
Wellman, "Screw Plug Immersion Heaters", Technical Brochure.

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