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:
Dec. 22, 1998
Filed:
Apr. 14, 1997
Applicant:
Inventors:
Nagato Uzaki, Toyohashi, JP;
Masayoshi Kasazaki, Hoi-gun, JP;
Hisashi Harada, Hoi-gun, JP;
Kazuo Sugimoto, Toyokawa, JP;
Assignee:
Sintokogio, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22C / ; B22C / ;
U.S. Cl.
CPC ...
164 22 ; 164 37 ;
Abstract
A method of filling a core cavity, wherein the entire core cavity is uniformly filled with highly compacted sand for molding the core without the need of providing many ventholes. The method is characterized in that sand for molding the core is drawn into the core cavity through an inlet to preparatorily fill the cavity, and then the thus prepared sand is repeatedly and sequentially compacted by impulsively pressurizing the sand, starting with the sand farthest from the inlet and ending with the sand nearest to the inlet.