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. 18, 1987
Filed:
Mar. 10, 1986
Ronald D Grose, Omaha, NE (US);
Other;
Abstract
An aquarium filtration system includes an assembly of coaxial tubes within an aquarium which draws water through the conventional under-gravel filtration system of the aquarium, and communicates the initially filtered water to a fine-sand filter assembly located in a separate tank below the aquarium. The filtered water in the lower tank is then pumped upwards through the innermost tube of the coaxial tube assembly and returned to the aquarium. A water conduit, which surrounds the water supply tube, extends upwards to the desired water level of the aquarium, and conduit is axially adjustable to vary the water level. A casing surrounding the water conduit has an open bottom and allows water from the under-gravel filtration system to pass upwardly to the top of the water conduit, where it is drained to the filter assembly in the lower tank.