Electric resistance heating devices – Heating devices – Continuous flow type fluid heater
Reexamination Certificate
2007-07-24
2007-07-24
Campbell, Thor S. (Department: 3742)
Electric resistance heating devices
Heating devices
Continuous flow type fluid heater
C392S465000, C392S481000
Reexamination Certificate
active
11224228
ABSTRACT:
The present invention relates to a dental water heater. The water heater has a columnar body, and the body includes heating means extending in the axial direction of the body, and a plurality of layers of water channel sections arranged around the heating means. Each of the water channel sections spirally extends in the axial direction of the body. The adjacent pairs of the water channel sections are communicated either at upper or lower end portions thereof so as to together form a whole water channel. The whole water channel has an inlet and an outlet for water to be heated, so that water is supplied through the inlet, passed through the entire length of the whole water channel, and taken out as warmed water through the outlet.
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Campbell Thor S.
Hahn & Voight PLLC
Nakanishi Inc.
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