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:
Jun. 22, 2010
Filed:
Apr. 25, 2005
Akira Sakurai, Shimotsuke, JP;
Hajime Miyasaka, Tochigi-ken, JP;
Yoshimichi Asai, Kawagoe, JP;
Hiroyuki Ohashi, Utsunomiya, JP;
Kazumi Nagao, Utsunomiya, JP;
Akira Sakurai, Shimotsuke, JP;
Hajime Miyasaka, Tochigi-ken, JP;
Yoshimichi Asai, Kawagoe, JP;
Hiroyuki Ohashi, Utsunomiya, JP;
Kazumi Nagao, Utsunomiya, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A method of manufacturing a cylinder block using a die apparatus wherein a columnar hole includes a bore in the cylinder block. The method includes the steps of abutting first and second split cores against an upper surface of a distal end core, the upper surface being located opposite the inner core, and introducing a molten metal into a cavity. An inner core is withdrawn to move the first and second split cores toward an axis. The first and second split cores are released from a formed product made of solidified molten metal. The split cores are removed from the formed product to form the bore, and an inner surface of the bore is cut.