Cartridge heater having resilient retaining means

Details Cartridge heater having resilient retaining means Cartridge heater having resilient retaining means

1990-06-01

1992-03-10

Reynolds, Bruce A.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219523, 219544, 219534, H05B 300, H05B 382

Patent

active

050951939

ABSTRACT:
A cartridge heater for insertion within a heater bore-hole or cavity having a peripheral cavity wall surface. The cartridge heater includes an elongated generally cylindrical sheath having a heating element disposed therein and having an internal spring chamber intersected by a pair of elongated slots formed in the sheath. A generally V-shaped spring member is disposed within the spring chamber and has a pair of arcuately shaped arm portions projecting outwardly through the elongated slots for frictional engagement against the wall surface of the cavity to retain the cartridge heater within oversize cavities. The spring chamber may be formed as an extension of the forward or rearward ends of the cartridge sheath.

REFERENCES:
patent: 1279111 (1918-09-01), Homan
patent: 1312485 (1919-08-01), Krauth
patent: 1935560 (1933-11-01), Herold
patent: 2062424 (1936-12-01), Mueller
patent: 3412231 (1968-11-01), McElligott
patent: 3581056 (1981-05-01), Djenner
patent: 3643988 (1972-02-01), Ingvartsen
patent: 3937923 (1976-02-01), Smith
patent: 4822980 (1989-04-01), Carbone et al.

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