Armstrong Teasdale LLP
Pre-filter bag for vacuum cleaner and vacuum cleaner including same
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.
Emerson Electric Co.
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Daniel M. Jason E. Joseph T.
Henke Hill Gierer