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:
Jan. 30, 1990
Filed:
Dec. 30, 1988
Wayne R Mitchell, Muncy, PA (US);
Sprout-Bauer, Inc., Muncy, PA (US);
Abstract
A hammer mill (10) having a feeder section (14) connected vertically above a mill section (12) such that feed material from a feed supply containing tramp metal (46) is introduced into the feed section and is divided therein into discrete quantities which are poured at a predetermined rate into the mill section. A continuously rotating feeder member (28) is situated in the vertically upper portion of the feeder section, the feeder member including means (40) for transporting a discrete quantity of feed material from a first position where the quantity is separated from the feed supply to a second position where the quantity is poured toward the mill section. A continuously rotating drum magnet (44) is situated below the rotating feeder member such that the quantities of feed material fall toward the drum magnet as the quantities are poured. In this manner, the tramp metal in the feed material is magnetically captured by the drum magnet and the remainder of the feed material falls into the mill section. The tramp metal is detached from the drum either passively as a result of differential magnetization of the drum, or actively by a wiper blade or air stream.