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:
Apr. 07, 1992
Filed:
Feb. 28, 1990
Applicant:
Inventors:
Pierre Mailliet, Howald, LU;
Henri Radoux, Bereldange, LU;
Leon Ulveling, Howald, LU;
Jeannot Loutsch, Howald, LU;
Emile Lonardi, Bascharage, LU;
Assignee:
Paul Wurth S.A., , LU;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ; F16K / ; F16K / ;
U.S. Cl.
CPC ...
137242 ; 251 58 ; 251159 ; 251172 ; 251301 ; 251303 ; 251 635 ;
Abstract
The device comprises a housing with a circular passage orifice, a pivoting closing element in the form of a spherical dome and a circular gasket surrounding the said orifice and mounted on an annular support axially displacable towards the closing element under the action of a pneumatic fluid, the said annular support possessing for this purpose a passive annular surface exposed to the pressure in the said housing, the active surface of the support being larger than its passive surface.