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. 25, 1988
Filed:
Sep. 15, 1987
Applicant:
Inventors:
Clifford F Corbett, Walsall, GB;
Helmut Schopp, Borken, DE;
Assignee:
Foseco International Ltd., Birmingham, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C / ;
U.S. Cl.
CPC ...
164359 ; 164 53 ; 164360 ; 249197 ;
Abstract
A feeder sleeve (1') for use in the casting of molten metal has a cavity (8) whose cross-sectional area at the bottom of the cavity (8) is greater than the cross-sectional area at the top of the cavity (8) such that a line joining a point (11.1) on the inner surface (11) of the sleeve at the bottom of the cavity (8) and the nearest point (11.2) on the inner surface (11) of the sleeve at the top of the cavity (8) is less than 80.degree. to the horizontal. The inner surface of the sleeve may taper from the bottom of the cavity to the top of the cavity uniformly or in at least one step (12).