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:
Jun. 01, 2004
Filed:
Jan. 03, 2002
Applicant:
Inventors:
Tomohiro Takano, Tokyo, JP;
Takumi Miyazaki, Tokyo, JP;
Assignee:
Yamatake Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16K 3/144 ;
U.S. Cl.
CPC ...
F16K 3/144 ;
Abstract
A spring return type valve system includes: a valve ( ) having a valve shaft ( ) to be operated rotationally for controlling the flow rate of fluid flowing through a fluid channel; an actuator ( ) having an output shaft ( ) rotated by an electric motor; a spring unit ( ) having a rotating shaft ( ) for transmitting the rotational power of the actuator output shaft to the valve shaft and a return spring for giving the rotating shaft a rotational power in one direction; and a yoke ( ) for the actuator and the spring unit to be detachably mounted on.