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:
Dec. 20, 1983
Filed:
Aug. 30, 1982
Applicant:
Inventor:
John A Burke, Rocky River, OH (US);
Assignee:
Greene, Tweed & Co., Inc., North Wales, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; E21B / ;
U.S. Cl.
CPC ...
277 12 ; 277 30 ; 2771162 ; 277117 ; 277190 ; 285140 ;
Abstract
An oil well string member has a cylindrical outer periphery having first and second cylindrical surfaces axially spaced and connected by a tapered ramp. The surfaces are radially inwardly of the outer periphery. The first surface has a smaller diameter than the second surface. A seal assembly is provided along the first surface and arranged to respond to fluid pressure for moving the assembly across the ramp to the second surface to a sealing position.