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:
Apr. 27, 2021
Filed:
May. 22, 2017
Alfa Laval Corporate Ab, Lund, SE;
Kenneth Rehhoff, Odense C, DK;
Jens Folkmar Andersen, Fredericia, DK;
ALFA LAVAL CORPORATE AB, Lund, SE;
Abstract
A technology is disclosed for controlling the function of a pneumatic valve actuator. The piston of the valve actuator is biased to be in first state and move to a second state when pressurized. A conduit connects the pressure side and non-pressure sides of the valve actuator for supplying the non-pressure side of the valve actuator with gas from the pressure side of the valve actuator. A control valve is connected to the conduit for controlling a release of gas from the pressure side of the valve actuator. The valve controller also has pressure-relief valve connected to the conduit between the control valve and the non-pressure side of the valve actuator for reducing the pressure in the conduit.