The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 20, 2001
Filed:
Mar. 23, 1999
Clarence Krieser, Richland, PA (US);
James Miller, Lebanon, PA (US);
Marsulex Environmental Technologies, LLC, Lebanon, PA (US);
Abstract
An apparatus and process for removing fine particles from sand and other particulate material. The apparatus is generally an air classifier (,) that combines gravitational and aerodynamic forces to classify sand at 10 mesh and finer. According to this invention, the classifier (,) is configured to have a vertical passage (,) centrally located at the vertical axis of an annular-shaped passage (,). The vertical passage (,) is defined by a plurality of inclined vanes (,) that are vertically separated by gaps (,). The sand or other particulate matter is introduced through an inlet (,) at or near the top of the annular-shaped passage (,), and then flows downwardly through the annular-shaped passage (,) around the vertical passage (,). Air is flowed substantially horizontally into the annular-shaped passage (,) and radially inward toward the vertical passage (,) and the vanes (,) thereof so that, as the particulate matter flows downwardly through the annular-shaped passage (,), the air separates a relatively finer constituent of the particulate matter from a relatively coarser constituent of the particulate matter.