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:
Oct. 14, 1997
Filed:
Dec. 22, 1993
Applicant:
Inventors:
Radomir Andonov, Mamer, LU;
Emile Lonardi, Bascharage, LU;
Gilbert Bernard, Helmdange, LU;
Giovanni Cimenti, Fentange, LU;
Assignee:
Paul Wurth S.A., , LU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B08B / ; F16K / ;
U.S. Cl.
CPC ...
137240 ; 222148 ; 1341 / ; 251298 ;
Abstract
A gastight isolation valve for solid materials is presented. The body of the valve has a lower edge which, defines, in the leaktight closed position, an air seal. The air seal is surrounded by a projecting element of the closure member which comprises, on the outer side, an outer peripheral flank having a first gradient. A peripheral sealing surface extends the outer peripheral flank. The sealing surface interacts with a sealing seat of the valve body to provide gastightness.