US PATENT SUBCLASS 137 / 306
.~.~.~.~ With screw or gear in actuating mechanism

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  DF  .~.~ Stop and waste {3}
304  DF  .~.~.~ Separate relatively movable valves with single actuator {2}
306.~.~.~.~ With screw or gear in actuating mechanism

DEFINITION

Classification: 137/306

(under subclass 304) Apparatus in which the valve actuator includes a screw or gear interposed between the main valve and the waste valve.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

215+, and 264+ for valve actuators of general application involving a screw, and subclasses 248+ for valve actuators of general application including a gear.