US PATENT SUBCLASS 137 / 307
.~.~.~ Reciprocating relatively fixed valves

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}
307.~.~.~ Reciprocating relatively fixed valves {1}
308  DF  .~.~.~.~> Waste through lower valve guide

DEFINITION

Classification: 137/307

(under subclass 302) Apparatus in which the control valve and drain valve are relatively fixed and comprise a reciprocating body. A unitary body, usually cylindrical, and cooperating with plural ports to accomplish the stop and waste function is included in this subclass.

(1) Note. Screw actuated valves are considered reciprocating for the purposes of this subclass when the rotary component of the valve movement is not necessary to the valving function.

SEE OR SEARCH CLASS

222, Dispensing

453, for axially slidable rigidly connected valves for stationary measuring traps for dispensers.