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:
May. 08, 1990
Filed:
Sep. 03, 1986
Michael A Pitcher, Powell, OH (US);
Albert L Haugse, Dublin, OH (US);
Richard L Pelfrey, Worthington, OH (US);
Gregory P Sturtz, Worthington, OH (US);
Ashland Oil, Inc., Ashland, KY (US);
Abstract
Disclosed is a method for making metal castings wherein a composite core assembly is utilized. The composite core assembly comprises at least one casting core and one temporary core which are in intimate contact wherein the temporary core is removed prior to casting. The improvement of the present invention comprises forming the temporary core comprising an aggregate and binder of materials such that the temporary core is sufficiently soluble in aqueous solvent for its removal prior to metal casting. The casting core is not removed by the aqueous solvent.