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. 01, 2003
Filed:
Nov. 30, 2000
Applicant:
Inventor:
Joeo M. Gatti, Strongsville, OH (US);
Assignee:
Spirex Corporation, Youngstown, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/548 ; B29C 4/552 ; F16K 1/506 ; F16K 1/518 ;
U.S. Cl.
CPC ...
B29C 4/548 ; B29C 4/552 ; F16K 1/506 ; F16K 1/518 ;
Abstract
A three piece, sliding ring valve for use in a plasticating screw and barrel arrangement has an extended life. The sliding ring has apertures for passing molten resin therethrough. The sliding ring also has annular contact surfaces for spreading the force driving the screw, thereby decreasing the pressure between the sliding ring and the valve retainer. The result is less valve wear and longer life.