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. 06, 2005
Filed:
Dec. 16, 2003
Mitsushi Maeyama, Chiba, JP;
Yoshiyuki Miyagi, Ichikawa, JP;
Shigeru Takabe, Sagamihara, JP;
Masahiro Makita, Hiroshima, JP;
Masayoshi Sasaki, Hiroshima, JP;
Tatsuya Fujii, Hiroshima, JP;
Mitsushi Maeyama, Chiba, JP;
Yoshiyuki Miyagi, Ichikawa, JP;
Shigeru Takabe, Sagamihara, JP;
Masahiro Makita, Hiroshima, JP;
Masayoshi Sasaki, Hiroshima, JP;
Tatsuya Fujii, Hiroshima, JP;
Ishikawajima-Harima Heavy Industries Co., Ltd., Tokyo, JP;
Abstract
A method for manufacturing a supercharger rotor by casting a profile portion of a supercharger rotor and a shaft penetrating the same, having the steps of: first cutting a left and right helical cross portion on a surface of the shaft connected to the profile portion, wherein the cross portion includes a right handed helical groove and a left handed helical groove, and these grooves cross each other; and casting the profile portion around the shaft in die-casting. In this way, a plurality of profile portion divided metal molds surround a profile portion and end metal molds surround both rotor ends. A helical core is attached to one end mold to pass through the profile portion. A rotor-shaped cavity forms inside the molds. Hot metal is pressurized, injected and solidified in the cavity, and the end mold having the helical core is pulled out by rotation along a helical line.