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:
Jun. 23, 1998
Filed:
Dec. 21, 1995
Vijai P Gupta, Berwyn, PA (US);
Other;
Abstract
The present invention provides an apparatus for cleaning particulate materials which readily sink in water, being slightly heavier than water, such as beans, peas, grains, etc.; by removing much heavier particulates such as stones, glass, metal pieces, etc., and, by also removing particulates which either float or sink very slowly in water, such as plant stems and leaves, dead insects, bean pods, husks, dust etc. Differences in settling velocities in water are used to separate groups of particulate materials, by allowing the particulates to float or settle through two columns filled with water. The columns have water flowing upward at different velocities, or water flowing upward through one column and stagnant water in the other column.