Skip to Content
Find More Like This
Return to Search


United States Patent

February 24, 2009
View the Complete Patent at the US Patent & Trademark Office
A number of embodiments of a piston may have a shape that provides enhanced piston guidance. In such embodiments, the piston shape may include an axial profile that is configured to provide certain thrust load characteristics.
Donahue; Richard J. (Colgate, WI)
Dresser, Inc. (Addison, TX)
11/ 677,714
February 22, 2007
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of DE-FC02-01CH11080 awarded by the Department of Energy.