(under subclass 456) Apparatus which includes a mechanism which senses and is responsive to variations in the velocity of the fluid flowing through the line.
(1) Note. This subclass includes apparatus in which the sensing means is inherently responsive to fluid velocity regardless of how the sensing means is described or claimed by the inventor.
(2) Note. If a device is described as flow responsive but is equally responsive to static pressure, it is classified on the latter basis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
483, for suction flow governors with reactors sensing changes in flow or pressure differential in the line.
486, for pilot or servo controlled valves which sense changes in flow or pressure differential in the line.
497, for valves having a separate fluid reactor surface which responds to changes in flow or pressure differential in the line.
