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:
Feb. 16, 2010
Filed:
Apr. 10, 2003
Steve Martin Brooks, Surrey, GB;
Robert Ivan John Wiedemann, Middlesex, GB;
David Goodwin, Surrey, GB;
Steve Martin Brooks, Surrey, GB;
Robert Ivan John Wiedemann, Middlesex, GB;
David Goodwin, Surrey, GB;
Pet Mate Ltd., Hersham, Surrey, GB;
Abstract
A self-cleaning assembly comprising an enclosed casingwith a movable pistonand filterstherein. The preferred assembly has a casingwith a dirty water inlet, a first outletfor clean filtered water and a second outletfor the removal of sludge from the casing. The filter assembly is constructed and arranged to provide, in its normal operating mode, a liquid flow path through the filterin a first direction between the dirty water inletand the clean water outletand, in a cleaning mode, to provide a liquid flow path in a second direction between the dirty water inletand the sludge outlet. In the cleaning mode, the movable membercompresses the filtersduring the liquid flow in the second direction and contaminant is released therefrom for removal from the filter assembly via the second outlet. In an alternative embodiment, the sludge outletis omitted and sludge is removed from the casing via the outlet