.~ Comprising seal, or element cooperating therewith, movable axially for controlling outlet on periphery of bowl
DEFINITION
Classification: 494/40
Comprising seal, or element cooperating therewith, movable axially for controlling outlet on periphery of bowl:
(under subclass 38) Apparatus wherein the means comprises either a seal (e.g., a gasket) or an element (e.g., a surface for engaging the seal), which is movable in a direction paralleling the axis of the member for the purpose of opening or closing one or more apertures located, usually, on a line representing a circumference of the member.
(1) Note. In some instances, either the seal or the cooperating element is a component of a movable portion (e.g., one of the hemispheres of a spherical bowl) of the member.
(2) Note. Sealing of the kind found in this subclass occasionally is a hallmark of a "closed centrifuge." In that event, it may be associated with conditions such as (a) a positive pressure in the bowl (as developed, for example, by feeding into the bowl under pressure), (b) pressure at the outlet resulting from flow resistance in a conduit receiving the discharge, (c) avoiding leakage which might otherwise develop as a result of lateral motion of the bowl induced, for example, by vibrations encountered at higher speeds of rotation, or (d) a necessity for preventing air from getting into the material being discharged (and thus, in some instances, avoiding "frothing").
