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:
Jan. 20, 2009
Filed:
May. 10, 2004
Applicants:
Jason G. Olberding, Marshalltown, IA (US);
Douglas J. Boyd, Marshalltown, IA (US);
Inventors:
Jason G. Olberding, Marshalltown, IA (US);
Douglas J. Boyd, Marshalltown, IA (US);
Assignee:
Fisher Controls International, LLC, Saint Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Apparatus for increasing stiffness in a seal are disclosed. A disclosed apparatus includes a first flexible member having a curved sealing surface and a second flexible member adjacent to a retainer side of the first flexible member. The second flexible member is configured to increase a stiffness of the first flexible member in one of a plurality of flow directions.