Electrical sleeve heater

Details Electrical sleeve heater Electrical sleeve heater

2006-05-23

2006-05-23

Evans, Robin O. (Department: 3742)

Electric heating

Heating devices

With heater-unit housing, casing, or support means

C219S424000, C219S546000, C219S549000, C219S536000, C425S549000

Reexamination Certificate

active

07049555

ABSTRACT:
A sleeve heater has an electrical and generally cylindrical heater coil centered on an axis and shaped to fit over a part to be heated, a radially compressible and generally cylindrical inner sleeve snugly coaxially surrounding the heater coil, and a radially generally inextensible and generally cylindrical outer sleeve fitted coaxially over the inner sleeve. The outer sleeve has an inner surface bearing tightly radially inward on the inner sleeve and radially compressing the inner sleeve and the coil inward. The inner sleeve is formed with two or more axially extending and axially oppositely open slots that are angularly equispaced, with alternate slots open axially in opposite directions.

REFERENCES:
patent: 3849630 (1974-11-01), Halliday
patent: 5558888 (1996-09-01), Beck
patent: 5687996 (1997-11-01), Steinmetz et al.
patent: 6163016 (2000-12-01), Johnson et al.
patent: 6482049 (2002-11-01), Swearingen
patent: 6680464 (2004-01-01), Carter et al.

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