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. 23, 1982
Filed:
Sep. 09, 1980
Siegfried Chszaniecki, Hanover, DE;
Hermann Berstorff Maschinenbau GmbH, Hannover Kleefeld, DE;
Abstract
Drive means for a twin screw extruder has a pair of drive shafts mounted in a housing and each to be connected to a drive and to a respective one of the screws of the extruder. A thrust bearing to absorb the axial thrust applied to the screws comprises a thrust ring surrounding both drive shafts and supported in the housing by an axial roller bearing, a pair of coaxial butting rings inserted in and secured against rotation with respect to the thrust ring, off-set from one another in an axial direction and surrounding the two drive shafts and a respective shaft thrust ring for each drive shaft secured thereon against relative rotation. The two shaft thrust rings are off-set from one another in an axial direction with each shaft thrust ring bearing against a respective one of the butting rings. The surfaces of each thrust ring and associated butting ring facing towards one another are preferably of tapered construction to facilitate lubrication.