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:
Apr. 05, 2005
Filed:
May. 23, 2003
Kouichi Ojima, Tokyo, JP;
Kenji Nakao, Tokyo, JP;
Hidehiro Soga, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An electromagnetic valve () which can ensure a predetermined response behavior while sustaining a desired control performance with operation noise being suppressed even after operation over an extended time includes a plunger assembly () having a plunger (), a coil () for driving the plunger (), a fixed core () disposed in a direction in which the plunger () is displaced for attracting the plunger assembly () to a retracted position upon electrical energization of the coil () to thereby hold the plunger at that position, a resilient member () disposed, being compressed, between the plunger () and the fixed core () to resiliently urge the plunger assembly () to an advanced position, and a spacer () interposed between the plunger () and the fixed core (). The spacer () is provided with a protrusion ().