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:
Feb. 17, 2004
Filed:
Dec. 21, 2001
Applicant:
Inventors:
Assignee:
SMC Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15B 1/3044 ; F16K 3/108 ;
U.S. Cl.
CPC ...
F15B 1/3044 ; F16K 3/108 ;
Abstract
A self-holding type solenoid-operated valve comprises a single coil which is wound around a bobbin in one direction, a movable iron core which is disposed coaxially with a fixed iron core, a first spring which urges the movable iron core away from the fixed iron core, and an annular permanent magnet which is installed to a portion at which an end of the fixed iron core and an end of the movable iron core are opposed to one another. The annular permanent magnet partially surrounds the outer circumferential surfaces of the fixed iron core and the movable iron core.