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:
Jan. 19, 1982
Filed:
Apr. 04, 1980
Applicant:
Inventor:
Claud C Barrington, Houston, TX (US);
Assignee:
Exxon Production Research Company, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
251 636 ; 1372 / ; 166324 ; 166363 ;
Abstract
A pressure insensitive, fail-safe subsea valve is disclosed. The valve is manipulator operable for deep water application and does not require conventional diving techniques to install, maintain or remove. The valve is pressure balanced by employing a hollow valve stem which equalizes the pressure on both ends of the stem.