(under the class definition) Dispensers where the the discharge controller or closure is formed of two or more parts, each covering part of the outlet opening and each movable both relative to each other and relative to the container.
(1) Note. Slat type devices where all slats are connected together to move as a unit are not included.
(2) Note. The movement may be for adjustment of the outlet
size.
(3) Note. For plural outlets having flow controllers or closures, see preceding subclasses, and for single outlets having serial flow controllers or closures, see subsequent subclasses, these being referred to in the following notes.
SEE OR SEARCH THIS CLASS, SUBCLASS:
198, for single outlets bounded by plural vibrating members. 316, for discharge assistants of rotor type with sectional discharge controllers.
481+, for discharge controllers, for plural openings.
545+, and see the notes thereto for plural nonsectional flow controllers or closures for single outlets.
SEE OR SEARCH CLASS
251, Valves and Valve Actuation,
1.1+, for valve type blowout preventers comprising an annular valve or segments closing around a well or drill pipe.
