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:
Oct. 05, 1982
Filed:
May. 24, 1979
Applicant:
Inventor:
Shinjiro Yamaguchi, Kawaguchi, JP;
Assignee:
Sankyo Oilless Industry, Inc., Fuchu, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164132 ; 249 59 ; 249183 ;
Abstract
A process for producing a hollow cast product in which a hollow flexible mandrel is placed into the crucible of a mold with one end of the mandrel extending out of the mold, molten metal is introduced into the mold crucible and left to solidify in the crucible and the mandrel is removed from the mold to thereby form a hollow cast product having a bore which has the smooth or concavo-convex peripheral surface and is straight, bent or meandering.