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:
Sep. 20, 1994
Filed:
Apr. 01, 1993
Applicant:
Inventors:
Kimio Kubo, Tochigi, JP;
Naotaka Deki, Mooka, JP;
Assignee:
Hitachi Metals, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164457 ; 164 65 ; 164255 ;
Abstract
The apparatus for producing a cast steel article has a permeable mold having a cavity, a sprue and at least one rise/run-off portion, and a vacuum apparatus, the permeable mold being provided with a hole having an opening on a mold surface near the rise/run-off portion, the vacuum apparatus being provided with a suction pipe having an opening which is brought into contact with the hole of the permeable mold, wherein the air is sucked from the hole by the vacuum apparatus, in order to conduct the casting of the article at reduced pressure.