Patent 7913971 was granted and assigned to Cameron International on March, 2011 by the United States Patent and Trademark Office.
A valve system comprising a closure member that is linearly translatable within a valve body. A hydraulic override assembly comprises a first end that is connected to the valve body and a first rod member that is connected to the closure member. A linear actuator is connected to a second end of the hydraulic override assembly and comprises a second rod member that is operable to move the first rod member.