US PATENT SUBCLASS 137 / 62
.~ Low temperature responsive drains


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

Internet Version by PATENTEC © 1999      Terms of Use



137 /   HD   FLUID HANDLING

59  DF  FREEZE CONDITION RESPONSIVE SAFETY SYSTEMS {3}
62.~ Low temperature responsive drains


DEFINITION

Classification: 137/62

(under subclass 59) Apparatus which operates to open an outlet so that at least part of the system is drained or emptied of liquid in response to the sensing of low temperature or freezing conditions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

570, for drain valve actuator combined with a pump.

596+, for distribution systems comprising a drain which is not automatic, and see the search notes thereto.