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:
Jan. 08, 2013
Filed:
Nov. 23, 2009
Maciej Brelski, Brampton, CA;
Christophe Halter, Selange, BE;
Maciej Brelski, Brampton, CA;
Christophe Halter, Selange, BE;
Husky Injection Molding Systems Ltd., Bolton, Ontario, CA;
Abstract
A check valve () for a screw () is provided. The check valve () includes a retainer tip (), operable to be attached to a distal end of a screw shaft (), the retainer tip () defining at least one melt channel (). A first ring () is coaxially mounted to and rotationally-coupled with the retainer tip (). A second ring () is coaxially and slidably mounted to the retainer tip (), and is operable to rotate relative to the retainer tip (). The second ring () is operable to reversibly move between an open position which permits melt to flow through the check valve () and a closed position which prevents backflow of the melt.