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:
Jun. 25, 1985
Filed:
Jul. 05, 1983
Applicant:
Inventor:
Charles R Williams, Carrollton, TX (US);
Assignee:
Otis Engineering Corporation, Carrollton, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ;
U.S. Cl.
CPC ...
166321 ; 166322 ; 166242 ;
Abstract
A cooperating landing nipple and subsurface safety valve in which the closure springs for the subsurface safety valves are carried by the landing nipple and the actuator and the pressure responsive member for effecting opening and closing of the valve are carried by the subsurface safety valve.