(under the class definition) Apparatus having (1) particle separating flow passages resulting from closely spaced parallel (or almost parallel) or concentrically arranged members along the faces of which a gas and solid or liquid
particles entrained therein is constrained to pass without reliance upon change of direction for separation but which provide either (a) a screen or grid-like pattern at the inflow end of the arrangement or (b) surfaces on which solid or liquid particles may settle or drop; or (2) a surface with somewhat exaggerated nap-like or pile-like covering along which a gas and solid or liquid particles entrained therein moves such that in effect the particles are swept out of the gas.
(1) Note. The shelf-like member must have sufficient space above it for movement of the gas so that not all of the gas is constrained to pass through the interstices formed by the nap or pile.
(2) Note. None of the patents in these subclasses have flow through the filter, but flow of the gas is along the surface of the filter material or parallel elements.
SEE OR SEARCH CLASS
55, Gas Separation,
440, for parallel nonplanar plates which cause gas to flow in a tortuous or sinuous path for separation and subclass 477 for filter media of strand or bristle type, having unsupported or free extremities, through which gas passes.
