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:
Jul. 23, 1985
Filed:
Dec. 20, 1983
Applicant:
Inventors:
Martin Eichlseder, Tettenweis, DE;
Erwin Burkle, Benediktbeuern, DE;
Assignee:
Krauss-Maffei Aktiengesellschaft, Munich, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
366 79 ; 2643281 ; 366 77 ; 4253 / ; 425564 ;
Abstract
A check valve at the end of a plastifying worm for an extrusion or injection molding machine comprises a valve ring whose inner diameter is greater than that of a tip at the end of the head of the worm and which surrounds the neck connecting this tip with the valve seat of the worm. Spacers, preferably balls, are disposed between the ring and the tip and the surfaces of the ring and the tip flanking the balls are oriented to allow radial removal of the balls when the valve projects from the cylinder.