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. 17, 2008
Filed:
Mar. 29, 2006
Applicants:
Shigeto Ryuen, Sendai, JP;
Takahiro Nagaoka, Kakuda, JP;
Inventors:
Shigeto Ryuen, Sendai, JP;
Takahiro Nagaoka, Kakuda, JP;
Assignee:
Keihin Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H 3/00 (2006.01); H01F 7/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electromagnetic apparatus includes a solenoid having a movable core for being attracted to a fixed core when a coil is energized, a shaft coupled to the movable core for displacement in unison with the movable core, and a valve mechanism having a ball for selectively opening and closing a passageway between an inlet port and an outlet port in response to the displacement of the shaft. The movable core has a nonmagnetic layer formed on an outer surface thereof and having a predetermined thickness.