US PATENT SUBCLASS 251 / 293
EXTENSION FOR ACTUATOR


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

293EXTENSION FOR ACTUATOR


DEFINITION

Classification: 251/293

(under the class definition) Subject matter wherein an additional actuating means is attached to the usual valve operating means whereby the valve may be actuated from a remote point, or wherein means are provided in connection with the usual valve operating means to adapt it for the attachment of an extension.

SEE OR SEARCH THIS CLASS, SUBCLASS:

41, and 57, for remote control of fluid pressure operated valves, and see the search notes to these subclasses.

229, for valve actuating means including two or more valve operators having dissimilar mechanical movements.

291+, for valves having detachable actuators, the part associated with the valve not being actuable manually when the separable part is removed, and see the search notes thereto.

294, for flexible actuators for valves. SEE OR SEARCH CLASS

137, Fluid Handling,

272+, for hydrants, in which the below-ground valve requires an extended actuating means and subclasses 343+ and principally subclasses 363+ for valves associated with static constructional installation which frequently involve extension operators.