US PATENT SUBCLASS 236 / 20 R
CLOSED FLUID HEATERS


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

20 RCLOSED FLUID HEATERS {8}
21 R  DF  .~> Safety cut-out {1}
22  DF  .~> Radiator type
*  DD  .~> Combined thermostat and flow controlled {2}
24.5  DF  .~> Flow and pressure controlled
25 R  DF  .~> Flow controlled {1}
26 R  DF  .~> Pressure-operated {11}
*  DD  .~> Thermostatic {2}
20 A  DF  .~> Top burner control

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 236/20

(under the class definition) Devices controlling the temperature of the fluid heated.