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, 1998
Filed:
Jul. 11, 1995
Applicant:
Inventors:
James Randall Gilmore, Ligonier, PA (US);
Lawrence J Rhoades, Pittsburgh, PA (US);
Assignee:
Extrude Hone Corporation, Irwin, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22C / ; B22D / ;
U.S. Cl.
CPC ...
164516 ; 164 701 ;
Abstract
Investment casting molds, and particularly mold cores, are formed of sintered ceramics to near net shape and are then machined to net shape, dimensions and surface finish, by ultrasonic machining with formed tools having the final configuration in mirror image form. Form machining of fired mold shells and cores is rapid, precise, readily controlled, and can produce castings of exceptional accuracy of shape, dimensions and surface finish.