(under subclass 94) Closures of the type generally known as "line blinds" which are of platelike form.
(1) Note. These devices differ from valves in that they have no surrounding housing to prevent leakage of fluid when the closure and seat are moved relative to each other.
SEE OR SEARCH THIS CLASS, SUBCLASS:
44+, for line blinds combined with flow restrictors.
SEE OR SEARCH CLASS
251, Valves and Valve Actuation,
167+, 193+ and 326+ for reciprocating gate valves, and see (1) Note above.
