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. 25, 2014
Filed:
Aug. 19, 2005
Peter Dietz, Clausthal-Zellerfeld, DE;
Guenter Schaefer, Goslar, DE;
Ilaka Mupende, Clausthal-Zellerfeld, DE;
Cem Turan, Clausthal-Zellerfeld, DE;
Wolfgang Walter, Aalen, DE;
Guenther Rduch, Lauf a. d. Pegnitz, DE;
Peter Dietz, Clausthal-Zellerfeld, DE;
Guenter Schaefer, Goslar, DE;
Ilaka Mupende, Clausthal-Zellerfeld, DE;
Cem Turan, Clausthal-Zellerfeld, DE;
Wolfgang Walter, Aalen, DE;
Guenther Rduch, Lauf a. d. Pegnitz, DE;
Leistritz Aktiengesellschaft, Nuremberg, DE;
Abstract
An extruder screw includes a screw shaft with several screw elements which can be or have been detachably slipped onto this shaft, the screw shaft having an external gearing and the screw elements having an internal gearing which engage the external gearing. The profile of the teeth of the external and the internal gearing are asymmetric, whereby in relation to a preferred direction of rotation of the extruder screw, the torque-transferring flanks of the teeth of the external and the internal gearing make a smaller angle with the perpendicular to the axis of rotation than do respective opposing flanks, at the teeth, of the external and internal gearing.