US PATENT SUBCLASS 251 / 342
.~ Jointed or flexible wall

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

341  DF  VALVE ACTUATOR IS VALVE CASING OR EXTENSION THEREOF {5}
342.~ Jointed or flexible wall

DEFINITION

Classification: 251/342

(under subclass 341) Devices in which the wall of the valve casing is jointed or flexible to permit a bending movement which actuates the valve.