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:
Mar. 06, 2001
Filed:
May. 11, 1999
Stuart M. Dennistoun, Carrollton, TX (US);
Halliburton Energy Services, Inc., Dallas, TX (US);
Abstract
A flapper valve assembly (,) for controlling fluid flow therethrough is disclosed. The flapper valve assembly (,) comprises a tubular valve housing having a valve chamber. A valve seat (,) is mounted within the housing. The valve seat (,) has a valve seat sealing surface (,). The valve seat (,) also has an internal load bearing shoulder (,). A flapper closure plate (,) is rotatably disposed within the valve chamber. The flapper closure plate (,) is rotatable between a valve open position in which the flapper closure plate (,) is removed from the valve seat (,) and a valve closed position in which the sealing surface (,) of the flapper closure plate (,) sealingly engages the valve seat sealing surface (,) for preventing flow through the flapper valve assembly (,). The maximum travel of the flapper closure plate (,) in the closed position is defined by the internal load bearing shoulder (,) of the valve seat (,).