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:
Feb. 03, 2009
Filed:
Feb. 28, 2005
David John Koester, Gladbrook, IA (US);
Sarah Lynn Dvorak, Ames, IA (US);
Lynn Dean Mahncke, Marshalltown, IA (US);
Brandon Wayne Bell, Marshalltown, IA (US);
Ronald R. Brestel, Marshalltown, IA (US);
David John Koester, Gladbrook, IA (US);
Sarah Lynn Dvorak, Ames, IA (US);
Lynn Dean Mahncke, Marshalltown, IA (US);
Brandon Wayne Bell, Marshalltown, IA (US);
Ronald R. Brestel, Marshalltown, IA (US);
Fisher Controls International LLC, St. Louis, MO (US);
Abstract
A control valve of the ball type with bi-directional shutoff capabilities is disclosed. The ball valve including an inlet and an outlet, a ball element and a seal assembly. When closing the valve, the ball element, which is eccentrically mounted on a shaft, rotates to abut the seal assembly. While closed, the seal assembly including a seal housing, a main seal and a resilient member, contacts the ball element at the main seal, while the resilient member biases the main seal toward the ball element. The seal assembly further includes a secondary flowpath between the main seal and seal housing, which is restricted by a high temperature seal.