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:
May. 12, 2009
Filed:
May. 21, 2003
Hideo Kato, Tochigi, JP;
Tomoichi Misawa, Gunma, JP;
Nobuaki Kobayashi, Gunma, JP;
Nobutaka Ishii, Gunma, JP;
Hideo Kato, Tochigi, JP;
Tomoichi Misawa, Gunma, JP;
Nobuaki Kobayashi, Gunma, JP;
Nobutaka Ishii, Gunma, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A valve element of a fuel injection valve comprises a cylindrical structural base which has an upper end contactable with a lower end of a core tube installed in a cylindrical case and a spherical valve head which is contactable with a valve seat arranged at a lower end of the cylindrical case. The structural base is a sintered magnetic metal member produced through a metal powder injection molding method and has a relative density ranging from approximately 95% to approximately 98%, and the structure base has, at the end thereof that is contactable with the downstream end of the core tube, a notched surface for suppressing an undesirable sticking of the end of the structural base to the downstream end of the core tube.