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:
Aug. 14, 1990
Filed:
Nov. 13, 1989
Darold S Alderman, Watertown, WI (US);
AMCA International Corporation, Charlotte, NC (US);
Abstract
A valve assembly includes a gasket trapped between spaced apart flanges of a valve stem. The gasket is worked over one flange, causing one end of the gasket to deflect with the cross-section undergoing a rolling motion. Upon passing the flange the deflected end of the gasket resumes its normal size, thereby remaining captive between the valve stem flanges. The valve stem flange and the gasket have recesses formed therein for visual inspection of hidden surfaces, useful to evaluate flush cleaning performed on the valve assembly. The gasket internal bore and the valve stem body extending between the flanges have complementary cross-sectional configurations. The gasket has a tapered bore to aid in insertion on the valve stem and the recesses are part conical, terminating at an intermediate point along the gasket bore. The gasket is dimensioned to float in radial and axial directions when mounted on the valve stem.