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:
May. 15, 1984
Filed:
Mar. 15, 1982
Applicant:
Inventors:
Steven C Speegle, Flower Mound, TX (US);
Kenneth L Schwendemann, Lewisville, TX (US);
Michael B Vinzant, Carrollton, TX (US);
Robert W Crow, Irving, TX (US);
Cary G Mondon, Carrollton, allof, TX (US);
Assignee:
Otis Engineering Corporation, Dallas, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16K / ;
U.S. Cl.
CPC ...
137630 ; 166324 ; 166332 ; 251 58 ;
Abstract
A surface controlled subsurface safety valve having a ball type valve closure. The ball member and its associated components are protected from damage by preventing excessive control fluid pressure from applying force to the ball member. Also, rotation of the ball member is prevented until any difference in pressure across the ball member and its seating surface has decreased below a preselected safe value.