US PATENT SUBCLASS 236 / 25 R
.~ Flow controlled

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

20 R  DF  CLOSED FLUID HEATERS {8}
25 R.~ Flow controlled {1}
25 A  DF  .~.~> Flow responsive valve controlling fuel

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 236/25

(under subclass 20) Devices in which the heating means is controlled according to the rate of flow of the fluid heated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

23, 24, 24.5, and 45, for other temperature or humidity regulators comprising flow control of the regulator.

SEE OR SEARCH CLASS

137, Fluid Handling,

98+, 458 to 460, 486+, 496, and 497+ for valves responsive to change in rate of flow.