US PATENT SUBCLASS 137 / 302
.~.~ Stop and waste

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

272  DF  HYDRANT TYPE {15}
301  DF  .~ Protection against freezing {1}
302.~.~ Stop and waste {3}
303  DF  .~.~.~> With disabling means
304  DF  .~.~.~> Separate relatively movable valves with single actuator {2}
307  DF  .~.~.~> Reciprocating relatively fixed valves {1}

DEFINITION

Classification: 137/302

(under subclass 301) Apparatus in which freezing of water in the riser is prevented by providing an auxiliary valve operated in at least one direction by the actuator of the main valve for draining the riser when the main valve is closed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

61, for low temperature responsive stop and waste devices.

102+, for self correlating systems of the supply and exhaust type, especially subclass 107 for waste responsive to flow stoppage.

281, for expansible chambers for draining water from the riser and retaining it.

596+, for stop and waste and drain valves in other types of fluent material handling apparatus, and see the search notes thereto.

625.2, for stop and waste valve units. SEE OR SEARCH CLASS

4, Baths, Closets, Sinks, and Spittoons,

337, and 339 for water closets having antifreeze drain means in riser pipes.

251, Valves and Valve Actuation,

143+, for drains for well pipes, etc.