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:
Jun. 23, 2015
Filed:
Sep. 18, 2012
Crane Pumps & Systems, Inc., Piqua, OH (US);
Chih M. Lin, Tipp City, OH (US);
William J. Watkins, Tipp City, OH (US);
Bruce B. Ordway, Troy, OH (US);
Other;
Abstract
A pump has a housing that defines a pump chamber () with a fluid inlet and outlet (). An impeller () is mounted for rotation in the pump chamber. A raceway () is in floating axial relationship with the impeller and divides the pump chamber into an inlet chamber (), an impeller chamber () and a discharge chamber (). The raceway has preferably two flow channels, in separated end-to-end arrangement. Each flow channel has an inlet passage and an outlet passage, establishing a fluid conduit from the inlet chamber to the impeller chamber and then to the discharge chamber. A spring () provides resistance to axial movement of the raceway away from the impeller. A seal chamber () formed on the raceway and pressurized by the fluid, urges the raceway towards the impeller.