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Class 251 - Valves and valve actuation

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426 Subclasses


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Definition

This class provides for means, for regulating flow of a fluid through a passage, either by closing the passage or restricting it by a definite predetermined motion of the closing-element, that are of general application not otherwise provided for.

Lines with other classes and within this class

A valve is distinguished from a closure of the cap type by being shiftable between open and closed position in the device rather than bodily removable from it, but pivoted closures and many pivoted valves have no definable difference. For this reason, closures associated with valves have been grouped with plural valves in certain parts of Class 137, Fluid Handling.

See the Class Definition of Class 137, Fluid Handling, References to Other Classes, for collected search notes on automatic valves, plural valves and their actuators, and manual valve actuation, selection, and/or adjusting.

 
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