Patent 8627893 was granted and assigned to Baker Hughes on January, 2014 by the United States Patent and Trademark Office.
A disk member selectively blocks flow across a fluid conduit formed in a body. The disk member may include a shaft having a longitudinal axis, a ring member disposed on the shaft, a sealing member disposed on the shaft, and a pressure applying surface in contact with the sealing member. The pressure applying surface may be non-orthogonal to the longitudinal axis.