.~ Plural operations (e.g., lifting and rotating rotary valve)
DEFINITION
Classification: 251/56
(under subclass 12) Subject matter wherein the fluid pressure actuator gives more than one character of motion or operation to the valve.
(1) Note. An example of plural operations would be rotating and raising a rotary valve, the raising being for the purpose of reducing friction while the valve is rotated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
157+, for plural mechanical operations including means to increase the head and seat contact pressure.
215+, for mechanical valve actuators giving more than one character of motion to the valve, and see the search notes thereto.
SEE OR SEARCH CLASS 137, Fluid Handling,
330+, for nonvalving motion of a valve or valve seat, i.e., a motion performed for some purpose other than assisting in opening or closing the valve.
