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:
Feb. 15, 1994
Filed:
Sep. 28, 1992
Applicant:
Inventors:
Masamichi Hayashi, Anjo, JP;
Yasuhiro Kawabata, Anjo, JP;
Shiro Machida, Okazaki, JP;
Takanori Kamiya, Anjo, JP;
Assignee:
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164132 ; 164346 ; 164120 ; 164112 ; 164 98 ; 164320 ;
Abstract
A piston is formed with a rib which is formed on a base portion and is formed with through holes which is formed in such manner that the core is in contact with a projection portions of a holding die.