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. 30, 2012
Filed:
Sep. 01, 2010
Masateru Yamamoto, Sakai, JP;
Ryohei Deguchi, Sakai, JP;
Satoshi Yamamoto, Sakai, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
A semi-molten or semi-solid molding method is used to cast a scroll member having a tabular panel, a spiral section and a columnar part. The method includes filling a cavity formed inside of the molding die with semi-molten or semi-solid metal from a section for forming the columnar part via a runner that forms a channel. The cavity forms a space for casting the scroll member. An angle of intersection θbetween the runner and the section for forming the columnar part is set such that to 97°≦θ≦135°, and/or a ratio R/√S is set such that 0.12≦R/√S≦0.96. R is a radius of curvature of a chamfered section in which the runner intersects the section for forming the columnar part, and √S is the square root of a cross-sectional area S of the section for forming the columnar part.