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:
May. 19, 2020
Filed:
Aug. 25, 2017
Emerson Electric Co., St. Louis, MO (US);
Joseph T. Gierer, Glen Carbon, IL (US);
Daniel M. Henke, Edwardsville, IL (US);
Jason E. Hill, St. Louis, MO (US);
Emerson Electric Co., St. Louis, MO (US);
Abstract
A vacuum cleaner includes a canister, a power head connected to a top of the canister, an inlet defined by one of the canister and the power head, an outlet defined by one of the canister and the power head, and a pre-filter bag disposed within the canister and fluidly connected between the inlet and the outlet. The power head includes an impeller assembly operable to generate airflow through the canister from the inlet to the outlet. The pre-filter bag includes an inlet port connected to the inlet, a radial inner wall, and a radial outer wall. The radial inner wall and the radial outer wall at least partially define an internal cavity and extend circumferentially about a central axis of the pre-filter bag such that the internal cavity forms a continuous, closed loop.