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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.:

US 4530605 B1

PDFFull Text
Date of Patent:
Jul. 23, 1985

Filed:

Dec. 20, 1983

Check valve arrangement for the discharge end of an extruder, plastifier

Applicant:
Inventors:

Martin Eichlseder, Tettenweis, DE;

Erwin Burkle, Benediktbeuern, DE;

Assignee:

Krauss-Maffei Aktiengesellschaft, Munich, DE;

Attorneys:

Ross; Karl F.

Dubno; Herbert

Primary Examiner:

Jay H Woo

Assistant Examiner:

J L Fortenberry

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.

Find Patent Forward Citations

Eichlseder, Martin. (1985). Check valve arrangement for the discharge end of an extruder, plastifier (U.S. Patent No. 4530605). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4530605

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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