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:
Nov. 25, 2003
Filed:
Mar. 05, 2001
Applicant:
Inventors:
John J. Wordin, Shelley, ID (US);
Eugene Chisely, Fort Smith, AR (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 5/00 ;
U.S. Cl.
CPC ...
F16K 5/00 ;
Abstract
A new, unique combination of the tractrix valve and the tractrix stem seal is described as an improvement over the original patents issued. The plug and the stem seal are juxtaposed large end to large end. The stem seal functions as a fluid seal and as a journal bearing. The purpose of the tractrix valve is to prevent leaks through the seat of the valve and to the outside environment past the stem seal by use of long-term self-renewing tractrix surfaces that continue to mate after continued use.