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, 1988
Filed:
Apr. 30, 1987
Applicant:
Inventors:
Tadahiko Nogami, Ibaraki, JP;
Ken Ichiryu, Ibaraki, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
13762565 ; 13762521 ; 13762523 ; 25112912 ; 310268 ;
Abstract
A rotary valve in which a valve disc provided disposed in a casing is rotated by a driving device, including a disc-shaped rotor provided in a portion of the valve disc and with a plurality of fan-shaped windings arranged in the circumferential direction, magnets provided in such a manner that the polarities thereof are alternately varied in the circumferential direction and a yoke disposed with a predetermined gap from the magnets. The said rotor is disposed between the magnets and the yoke and constitutes a magnetic circuit for rotating the valve disc directly by an electromagnetic power generated in the magnetic circuit.