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:
Dec. 19, 2006
Filed:
Nov. 12, 2004
Jiro Kondo, Kariya, JP;
Jiro Kondo, Kariya, JP;
Denso Corporation, , JP;
Abstract
A bottomed cylindrical member is disposed inner side of a stator core and a coil. The cylindrical member is made of non-magnetic material such as a stainless steel. The cylindrical member has a small diameter portion at the bottom side and a large diameter portion continuously made with the small diameter portion at the side of an attracting portion and has a larger inner diameter than that of the small diameter portion. The small diameter portion is slidablly in contact with a slider core, and reciprocatably supports the slider core. Since a radius difference between the small diameter portion and the large diameter portion is equal to or larger than 30 μm, a clearance larger than sliding clearance is formed between an inner circumferential surface of the large diameter portion and an outer circumferential surface of the sliding core. Thus, an electromagnetic driving apparatus and an electromagnetic valve, which smoothly reciprocate the sliding core, are provided.