Tubular heater with insulating material in the connection...

Details Tubular heater with insulating material in the connection... Tubular heater with insulating material in the connection...

2007-02-06

2009-02-24

Campbell, Thor S (Department: 3742)

Electric resistance heating devices

Heating devices

Continuous flow type fluid heater

C392S497000

Reexamination Certificate

active

07496284

ABSTRACT:
A heating apparatus for heating a fluid, in particular in domestic appliances, which comprises a tubular casing, at least one electrical resistance heating wire which is arranged in the interior of the tubular casing and which is embedded in an electrically insulating, heat-conducting insulating material in the tubular casing, at least one connection unit which is arranged in the interior of the tubular casing and which is passed outwardly out of the tubular casing for connection of the electrical resistance heating wire to an electrical energy source disposed outside the tubular casing, and at least one closure bead which closes the opening of the tubular casing. It is further provided that the connection unit is also surrounded by the insulating material within the tubular casing to the closure bead and the closure bead is, at its outside, provided with at least one filling slot which extends over its entire axial length.

REFERENCES:
patent: 3657519 (1972-04-01), Pease
patent: 3732398 (1973-05-01), Pease
patent: 3839623 (1974-10-01), Portmann
patent: 3934333 (1976-01-01), Churchill
patent: 3970817 (1976-07-01), Boyd
patent: 4186369 (1980-01-01), Attridge et al.
patent: 4263577 (1981-04-01), Bauchert et al.
patent: 4273993 (1981-06-01), Seeley
patent: 4287502 (1981-09-01), Nickmeyer
patent: 4346287 (1982-08-01), Desloge
patent: 5486682 (1996-01-01), Rysemus
patent: 2006/0289474 (2006-12-01), Johnson

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