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:
Jan. 06, 1998
Filed:
Aug. 04, 1995
Hiromu Kuromitsu, Chiryu, JP;
Hideharu Hironaka, Kariya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
An electromagnetic valve device includes a valve body having a first fluid chamber, and inlet and outlet passages fluidly communicating with the first fluid chamber. In a first fluid chamber, a first movable member is slidably received within a stationary sleeve to define a second fluid chamber within the sleeve. The second fluid chamber is in continuous fluid communication with the first fluid chamber and is in fluid communication with the inlet passage. The first member has a first valve for selectively interrupting fluid communication between the inlet passage and the first fluid chamber, and is urged by a return spring into a first position to effect fluid communication between the first fluid chamber and the inlet passage. A second movable member operatively connected to an electromagnet has a second valve for selectively interrupting the fluid communication between the inlet passage and the second fluid chamber. The second member is urged by a return spring into a non-energized position in which fluid communication between the second fluid chamber and the inlet fluid passage is interrupted when the first member is positioned in the first position. When the electromagnet is energized, the second member moves to an energized position and the first member is moved by the second member into a second position to interrupt fluid communication between the inlet passage and the first fluid chamber. A pressure differential between the inlet and outlet passages greater than a predetermined pressure differential holds the first member in the second position so that restricted fluid communication occurs between the inlet and outlet passages when the electromagnet is de-energized.