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:
Dec. 10, 1991
Filed:
Jul. 19, 1990
Applicant:
Inventors:
Claude Dumazeau, Maubeuge, FR;
Pascal Dubois, Feignies, FR;
Assignee:
Vesuvius Crucible Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
222602 ; 222603 ; 266272 ; 266225 ; 164259 ; 164415 ; 164437 ; 164337 ;
Abstract
The stopper rod for regulating the flow of a liquid has a body traversed by an axial channel and having at one end a porous nose fed with gas from the channel. The nose has a free space in the form of a hemisphere-shaped slot or lattice network communicating with the channel for delivery of gas thereto. Preferably, a plurality of spaced-apart bridges of solid material connect the two faces of the free space in order to increase the strength of the porous nose.