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. 04, 1991
Filed:
Feb. 12, 1990
Keiichiroh Nakatsukasa, Utsunomiya, JP;
Kenmei Kuneguchi, Utsunomiya, JP;
Ranco Japan Ltd., Tokyo, JP;
Abstract
A proportional control valve has a main fluid passage, a valve portion having a flap, a magnetic element disposed in proximity to the valve portion and mounted integrally in the main passage, a movable body disposed inside the magnetic element and actuated by the magnetic element to directly or indirectly displace the flap of the valve portion and an electric control unit connected to a detector for detecting a characteristic parameter to be controlled, and controlling the movable body in accordance with the detected parameter. This proportional control valve allows a precise and easy fluid flow rate control, as the fluid flow rate can be continuously and precisely varied in proportion to variations in the parameter detected by the detector.