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:
Apr. 15, 2008
Filed:
Oct. 14, 2004
Gregory J. Gutwein, Dayton, OH (US);
Donald Holder, Troy, OH (US);
Mark P. Kowalak, Troy, OH (US);
Bruce B. Ordway, Troy, OH (US);
Gregory J. Gutwein, Dayton, OH (US);
Donald Holder, Troy, OH (US);
Mark P. Kowalak, Troy, OH (US);
Bruce B. Ordway, Troy, OH (US);
Crane Pumps & Systems, Inc., Piqua, OH (US);
Abstract
A two-stage sewage grinder pump () having two impellers () and a grinder () attached to the motor shaft (). Preferably, both impellers are vortex impellers and are positioned between the grinder and the motor. The motor housing includes a discharge conduit () that is monolithic with the motor housing (). An anti-siphon valve () is integral with the discharge conduit. An integral discharge flange () and check valve () are attached to the discharge conduit to connect the sewage grinder pump to a sewage outlet.