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:
Jul. 15, 2003
Filed:
Feb. 08, 2002
Applicant:
Inventors:
Robert W. Ratte, North Oaks, MN (US);
Timothy J. Clift, Lino Lakes, MN (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C 9/00 ; B22D 2/506 ; B41B 1/152 ;
U.S. Cl.
CPC ...
B22C 9/00 ; B22D 2/506 ; B41B 1/152 ;
Abstract
An expandable mold for use with metals that expand during solidification with the expandable mold having sidewalls that are forcibly laterally separated to thereby expand the mold cavity sufficiently so as to free at least one portion of the cast article from an interference fit with a first portion of the mold to thereby enable removable of the cast article from an interference fit with a further portion of the mold without fracture of the cast article and for forming a smooth surface finish on the cast article.