Electric heating – Heating devices – With heating unit structure
Reexamination Certificate
2005-01-25
2005-01-25
Evans, Robin O. (Department: 3742)
Electric heating
Heating devices
With heating unit structure
C219S505000, C338S309000
Reexamination Certificate
active
06847018
ABSTRACT:
A heating element made from flexible circuit technology with a single contiguous heating zone for uniform heating or multiple temperature heating zones is described. These flexible heating elements can conform to three dimensional object surfaces with irregular shape. The heating element's overall flexibility and its thickness (in the region of 10 mils) allow for heating many object shapes in an efficient, compact and light-weight manner. Each thermal sensor or thermostat is used to regulate each heating zone and provide a unique temperature setting. A thermostat can be mounted directly on an object's metallic surface. In addition, using diodes connected to the flexible heating element is described here to allow the use of two or multiple voltage sources. The technique permits one heating element to be powered from either AC or DC sources with comparable heating characteristics from both. The technique also eliminates the use of a transformer, which makes the heating solution simple and particularly compact and lightweight.
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Evans Robin O.
Fastovsky Leonid M
Steptoe & Johnson LLP
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