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. 13, 1993
Filed:
Jan. 16, 1992
John W Kuhn, Bristol, IN (US);
Richard J Wylie, Wabash, IN (US);
CMI International, Inc., Southfield, MI (US);
Abstract
A sleeve of woven heat resistant material is axially compressed (22) to enlarge its cross-sectional area and perimeter. A support element (24) is disposed within the sleeve (22) to support it in its enlarged perimeter condition (26). The sleeve-covered support element (18) is then disposed in a cavity (14) of a casting mold (12) and molten metal (36) is cast into the cavity (14) and around the sleeve-covered support element (18). The molten metal (36) is allowed to solidify to form a cast article (16). The support element (24) is then withdrawn from within the sleeve (22), leaving the sleeve (22) within and adhered to the walls of the passageway (20) of the article in the expanded perimeter condition (26). A tension force A is applied to the sleeve (22) forcing it to stretch into a smaller cross-sectional area and perimeter (28) and causing the sleeve (22) to detach from the casting (16) for easy removal.