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. 30, 2015
Filed:
Jun. 06, 2012
Robert J. Dyer, Coweta, OK (US);
Thomas S. Myerley, Broken Arrow, OK (US);
Wade A. Miller, Broken Arrow, OK (US);
Matthew P. Presley, Tulsa, OK (US);
Michael L. Hair, Tulsa, OK (US);
Robert J. Dyer, Coweta, OK (US);
Thomas S. Myerley, Broken Arrow, OK (US);
Wade A. Miller, Broken Arrow, OK (US);
Matthew P. Presley, Tulsa, OK (US);
Michael L. Hair, Tulsa, OK (US);
Baker Hughes Incorporated, Houston, TX (US);
Abstract
A recess is provided at the periphery of the flapper so that a corner that defines this recess engages an o-ring seal in a seat for the flapper. A reduced contact area of the flapper on the o-ring seal results in increased pressure over the actual contact area. The pressure applied over the contact area also forces a distortion in the o-ring that has a part of the o-ring not restrained due to the presence of the recess moving out of the surrounding o-ring groove so that the corner on the flapper pinches the o-ring that now is partly in and partly extending from its surrounding groove. Sealing is obtained at lower differential pressures and the o-ring is better fixated as a result of the pinch effect of the corner on the flapper.