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:
May. 24, 1977
Filed:
Nov. 10, 1975
Stal-Laval Turbin AB, Finspong, SW;
Abstract
A valve system for controlling the flow of hydraulic fluid for opening and closing the main control valve for a turbine system. The valve system comprises: first valve means for passing hydraulic fluid to the servo motor to maintain the control valve open during normal operating conditions of the turbine and to interrupt the supply of hydraulic fluid in response to a predetermined normal pressure drop; second valve means for draining hydraulic fluid from the servo motor to close the control valve in response to a predetermined normal pressure drop in the turbine system; and third valve means for separately draining hydraulic fluid from the servo motor to relieve the latter of pressure rapidly in response to an abnormal pressure drop in the turbine system with consequent rapid closing of the control valve.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile