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:
Nov. 17, 1987
Filed:
Jun. 20, 1986
Kunihiko Takeuchi, Kawasaki, JP;
Hiroshi Nogi, Yokohama, JP;
Tokyo Keiki Company Limited, Tokyo, JP;
Abstract
A linear solenoid-type flow control valve with a valve element position feedback loop. An input consisting of an analog command signal is supplied in the form of a serial digital signal from a modulating transmitter through an optical fiber transmission line. An actuator operating driving circuit, a receiving demodulator for reconverting the light signal from the transmission line to the serial digital signal and further to the analog command signal and supplying it to the driving circuit, a differential transformer for detecting an operated position of a control valve element and a feedback circuit from the differential transformer are integrally mounted on the coupling component of the control valve element and its actuator and in this way the component parts at the receiving side are arranged as close as possible with respect to one another.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile