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:
Jun. 30, 1992
Filed:
Jan. 08, 1991
Applicant:
Inventor:
Paul A Yohner, Harris County, TX (US);
Assignee:
Keystone International Holdings Corp., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251308 ; 251305 ;
Abstract
Disc-stem connection for a butterfly valve using interfitted slots on the disc and stem for mechanical connection. An oversize slot on the disc creates channels between the disc and the stem which allows deep penetration of a weld bead. Centralization of the stems within the oversize slots is effected by means of small spacers interposed between the stems and the slot edges. The spacers are small enough so that the necessary space created for the weld is not displaced.