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:
Mar. 08, 2005
Filed:
May. 22, 2002
Tadashi Komiyama, Chiryu, JP;
Katsuhiro Kuroki, Nagoya, JP;
Koji Sakurai, Chita-gun, JP;
Michio Koshimizu, Toyohashi, JP;
Kazuto Maeda, Nagoya, JP;
Tadashi Komiyama, Chiryu, JP;
Katsuhiro Kuroki, Nagoya, JP;
Koji Sakurai, Chita-gun, JP;
Michio Koshimizu, Toyohashi, JP;
Kazuto Maeda, Nagoya, JP;
Denso Corporation, , JP;
Abstract
The electromagnetic valve has an electromagnetic actuator for operating a valve. The electromagnetic actuator has a movable core that reciprocally moves in an axial direction. A stator core has an attracting portion. The attracting portion has a conical portion that is defined by a uniform diameter inner surface and an outwardly inclined outer surface. The outer surface has a smaller diameter at a position closer to an initial position of the plunger. Therefore outer diameter of the conical portion is increased in an attracting direction of the plunger. Moreover, increasing rate of the outer diameter is decreased in the attracting direction. Therefore the outer surface has a greater inclination angle at a position closer to an initial position of the plunger.