Patent · US Active

Extruder screw, extruder and shaft-hub connection

US8678637B2 · kind B2 · utility

1Cited by

23References

40Claims

0Family size

Assignee

Leistritz Aktiengesellschaft · DE

Inventors

Peter Dietz · Bad Mergentheim, DE
Guenter Schaefer · Jacksonville, US
Ilaka Mupende · Neu-Ulm, DE
Cem Turan · Clausthal-Zellerfeld, DE
Wolfgang Walter · Heidelberg, DE
Guenther Rduch · Lauf an der Pegnitz, DE

Key dates

Filing date	Aug 19, 2005
Grant date	Mar 25, 2014
Priority date	—
Expiry date	Oct 23, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2001/103
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.