(under subclass 120) Subject matter wherein the movable guide or restrictor is adjustable, i.e., may be put into a different position or relation with respect to its mounting and/or actuator for the purpose of securing a different character or rate of flow when flow subsequently occurs.
(1) Note. See the class definition of Class 137, section 5, for search notes on manual valve actuation and adjusting.
SEE OR SEARCH THIS CLASS, SUBCLASS:
215+, and 264+, for screw actuators for valves, and see the search notes to subclass 264.
SEE OR SEARCH CLASS
138, Pipes and Tubular Conduits,
43, 45 and 46 for variable flow restrictors not combined with valves or distribution systems.
