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:
May. 20, 1997
Filed:
Apr. 24, 1996
Applicant:
Inventors:
David Callaghan, Edinboro, PA (US);
Richard K Reber, Erie, PA (US);
Assignee:
Snap-Tite, Inc., Union City, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137550 ; 2513353 ;
Abstract
The invention is a bellows valve which seals the stem of the valve. Dirt and other contaminants are trapped by the bellows. The valve includes a cover having a sintered metal filter therein. The filter permits gas to flow therethrough but does not permit dirt or other particulate contamination to flow therethrough. Pressure is equalized across the wails of the bellows allowing the valve to operate at high pressures while ensuring that the gas or fluid transported through the valve is kept clean.