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:
Aug. 15, 1978
Filed:
Nov. 26, 1976
Salomon Hakim, Bogota, CO;
Carlos A Hakim, Bogota, CO;
Hakim Company Limited, Saint Vincent, VC;
Abstract
The servo valve disclosed herein is rendered essentially insensitive to changes in pressure across the valving element by providing spring biasing of the valving element which is controlled by a diaphragm exposed to the inlet and outlet pressures. In a particular embodiment, the diaphragm is spring biased and the spring rates for the diaphragm and the valve element are selected in such proportion that the change in biasing force on the valve element exactly compensates for any change in inlet pressure. Therefore, the valve remains closed for any inlet pressure, unless the bias on the spring rates is unbalanced by a signal coming from a sensor.