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:
Dec. 22, 2009
Filed:
Jan. 03, 2008
Galen J. Rokey, Sabetha, KS (US);
Brian S. Plattner, Sabetha, KS (US);
Galen J. Rokey, Sabetha, KS (US);
Brian S. Plattner, Sabetha, KS (US);
Wenger Manufacturing, Inc., Sabetha, KS (US);
Abstract
Improved, high Specific Mechanical Energy extrusion systems () are provided including a single or twin extruder () and an upstream preconditioner (). The extruder () includes an elongated barrel () with at least one elongated, axially flighted, rotatable screw assembly () therein. The barrel () includes a mid-barrel variable restriction valve assembly (), and the screw assembly () has a disrupting/homogenizing screw section () therein upstream of the valve assembly (). The screw section () includes a plurality of alternating pitch screw parts (-). Preferably, the barrel () also has an atmospheric vent () downstream of the valve assembly ().