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. 17, 1998
Filed:
May. 17, 1996
Applicant:
Inventor:
Isao Suzuki, Tokyo, JP;
Assignee:
MKS Japan, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
25112915 ; 251 65 ;
Abstract
A solenoid valve is disclosed and includes a solenoid, a plunger made of a magnetic material, and a yoke receiving the plunger therein such that the plunger may be moved by the magnetic field produced by the solenoid. A valve element is connected to the plunger for controlling the rate of flow through the solenoid valve. A permanent magnet is disposed in a desired position outside the yoke. The magnetic flux of the magnetic field of the permanent magnet is effectively used for damping the oscillation of the plunger to thereby achieve excellent controllability of the valve.