Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Abram Galindo0
Jimmie R. Williamson, Jr.0
James D. Vick, Jr.0
Date of Patent
October 6, 2009
Patent Application Number
11004471
Date Filed
December 3, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
A safety valve with extension springs. In a described embodiment, a valve for use in a subterranean well includes a closure member having open and closed positions. A structure displaces to cause the closure member to displace between the open and closed positions. A biasing device has a length which decreases as the structure displaces to cause the closure member to displace toward the closed position.
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