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:
Jul. 23, 1985
Filed:
Mar. 16, 1984
Sydney K Tew, New Baltimore, MI (US);
Dan O Bauer, Grosse Pointe Farms, MI (US);
Other;
Abstract
A small, light-weight direct drive servovalve includes a force motor with a stationary magnet structure and a moving coil with the moving coil coupled to a valve spool by means of a lever mechanism which is pivotally mounted on a pivot hub and which amplifies the actuating force exerted on the valve spool. The moving coil is suspended from the pivot hub by dual convoluted spring diaphragms and through the lever mechanism imparts a linear, reciprocating movement to the valve spool. A tandem valve spool and sleeve assembly is employed and provides for two separated hydraulic systems in a common housing. A fuel metering system for a gas turbine engine utilizing such a direct drive servovalve is provided.