Patent Document ID: 4504018
Application ID: 06449054
Patent Flag: 1

Claim One:
1. A particle classifier for separating large particles from a mixture of small and large particles carried in a gas stream, comprising: (a) a cylindrical vertically-oriented housing having an upper head and a central opening extending through said head for removal of gas carrying fine particles; (b) multiple angled circumferentially-spaced upper vanes attached to said upper head for imparting a rotational motion to a gas-particle solids mixture passing therethrough; (c) an inner conical shaped casing located below and attached to the lower ends of said multiple vanes, so as to provide an annular passageway between said housing and said conical casing for upward flow of the gas-solids mixture therethrough; (d) multiple pivotable deflector vanes mounted radially inwardly from said conical casing, each vane being pivotable about its own longitudinal axis and inclined from the vertical and located entirely within the rotational flow path of the gas carried particles, whereby the pivot angle of each said vane is adjustable at an angle from a reference plane taken through the longitudinal axis of said pivotable deflector vane and the vertical center line of said housing, so as to control the flow velocity and degree of separation of the solid particles from the gas-particle mixture; and (e) at least one closeable opening located at the lower end of said conical casing for removal of the larger separated particles from the classifier.