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. 23, 2004
Filed:
Aug. 31, 2001
Ronald E. Gilbert, Spokane, WA (US);
Robert D. Dion, Spokane, WA (US);
Mark A. Palmer, Spokane, WA (US);
Kristopher M. Ratzlaff, Spokane, WA (US);
Roger Kauffman, Spokane, WA (US);
Charles Seale, Gulf Shores, AL (US);
Pyrotek, Inc., Spokane, WA (US);
Abstract
An impeller shaft assembly, coupler and molten metal pump are described, in which a coupling member is configured to be secured to a pump drive shaft and includes a socket part that is defined by a socket wall formed about and extending along an axis. The socket wall includes a plurality of coupling shaft engaging surfaces and a plurality of socket corner surfaces joining the shaft engaging surfaces. The socket corner surfaces are disposed radially outward from adjacent shaft engaging surfaces with respect to the axis.