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US 5,626,461 AGranted
Stranded impeller
AssigneeThe Scott Fetzer Company
InventorMitchell Rose
Life of this patent
Estimating the term…
Abstract
A fan for a vacuum cleaner has a fan housing, motor and impeller. The fan housing has an inlet and outlet. The impeller has a hub and multiple flexible blades, formed of a plurality of strips. This flexible blade fan provides better air performance, less noise, better durability, and easier impeller installation than conventional vacuum cleaner fans.
Claims10
A vacuum cleaner comprising:
- a nozzle for receiving dirt removed by an airflow;
- a filter bag for depositing said dirt received from said nozzle;
- an impeller for creating said airflow, said impeller comprising:
- a plurality of pliable blades for centrifugally displacing a volume of air upon rotation of the impeller, wherein said blades comprise a plurality of strips;
- and
- a hub for retaining said plurality of blades, wherein said hub secures the impeller to a motor-driven shaft for producing rotation.
3 more elements
A method for generating an airflow comprising the steps of:
- (a) providing an impeller having pliable blades including a plurality of strips;
- (b) rotating said impeller to produce said airflow;
- (c) rotating said impeller at a predetermined rotational rate so that the pliable blades extend radially outward without becoming backswept.
Dependencies are inferred from the claim text.