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:
Dec. 27, 2022
Filed:
May. 13, 2019
National Oilwell Vareo, L.p., Houston, TX (US);
James Ray Landrith, II, Humble, TX (US);
Frank B. Springett, Spring, TX (US);
Eric Trevor Ensley, Cypress, TX (US);
Jonathan Lewis Buelow, Houston, TX (US);
James W. Weir, Houston, TX (US);
Travis James Miller, Cypress, TX (US);
National Oilwell Varco, L.P., Houston, TX (US);
Abstract
A subplate mounted (SPM) valve includes a valve body having pilot port, a piston configured to be actuated by fluid from the pilot port, a first control chamber and second control chamber each formed in the valve body and fluidicly isolated from the pilot port, a first flow restrictor fluidicly disposed between the first control chamber and the second control chamber and configured to restrict flow in at least one direction between the first control chamber and the second control chamber, a cage coupled to the valve body and having a supply port, a return port, and a work port, and a spool slidably engaged with the cage and configured to selectively restrict flow between the supply port and the return port by actuation of the piston.