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. 04, 2003
Filed:
Feb. 22, 2001
Satoshi Ishigaki, Kariya, JP;
Yasunori Kobayashi, Toyohashi, JP;
Denso Corporation, Aichi-pref, JP;
Abstract
A valve member includes a first communication passage for allowing a first passage to communicate with a first pressure chamber. When a pressure-receiving member contacts the valve member, a communication between the first communication passage and the first pressure chamber is shut. Magnetic force of a permanent magnet urges a shaft toward the pressure-receiving member. While a coil is not energized, when pressure inside a second passage rises, the pressure-receiving member leaves the valve member due to pressure difference between pressure inside the first pressure chamber and pressure inside a second pressure chamber, so that the first passage communicates with the second passage through the first communication passage. When the coil is energized, magnetic repelling force is introduced between a stator core and the permanent magnet, so that the pressure-receiving member and the shaft depart from the valve member to allow the first passage to communicate with the second passage.