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:
Dec. 05, 2006
Filed:
Oct. 26, 2001
Applicants:
Ronald E. Gilbert, Spokane, WA (US);
Mark A. Palmer, Spokane, WA (US);
Inventors:
Ronald E. Gilbert, Spokane, WA (US);
Mark A. Palmer, Spokane, WA (US);
Assignee:
Pyrotek, Inc., Spokane, WA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F04D 29/24 (2006.01); F04D 7/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A molten metal pump system which includes a particle relief passageway between the vanes on the impeller and the pump base, the particle relief passageway being a predetermined size to allow particles of a predetermined size to pass between the plurality of vanes and the interior walls of the impeller aperture of the pump base. Part or all of the particle relief passageway may, but need not, be as a result of a shoulder on the radially outward end of the plurality of vanes in the inlet side of the impeller.