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:
Aug. 24, 1993
Filed:
Apr. 13, 1992
Applicant:
Inventors:
Robert Ellis, Wyckoff, NJ (US);
Allan H Willinger, Oakland, NJ (US);
Assignee:
Willinger Bros., Inc., Oakland, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
416188 ; 4162 / ; 4162 / ; 2104162 ;
Abstract
A water pump including a rotating impeller is located between the two filter chambers, and pumps water from the aquarium tank, via the inlet conduit, into a corridor which communicates with the two filter chambers. The impeller is constructed with relatively closely spaced radially extending blades, each of which is formed of a circular disk. A base edge, or chord, of each blade is inclined upon a frustoconical surface of a central hub of the impeller.