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US 3,942,963 AGranted
Vacuum cleaning system
AssigneeTevis-Campbell Corporation
InventorFelix H. Tevis
Life of this patent
Estimating the term…
Abstract
A vacuum cleaning system includes a stationary built-in power unit, a portable vacuum unit, and a flexible hose connecting the power unit and vacuum unit. Dirt and other particulate matter sucked into the system is trapped within a collection chamber of the vacuum unit and air within the collection chamber is evacuated therefrom to pass through the hose and the motor of the power unit.
Claims15
In a vacuum cleaning system, a portable vacuum unit, comprising:
- a housing having an inlet, an outlet, and a vacuum chamber therebetween through which air flows;
- said housing having a removable lid attached thereto defining said vacuum chamber;
- a flanged member secured to said housing;
- a closed collection filter chamber connected with said inlet, said collection filter chamber including a filter means comprising a pair of separable and substantially hemispherical filter elements including flanged means joining said filter elements and said flanged member, said filter elements being joined so as to form a filter means enclosure adapted to trap particulate matter drawn into said inlet along with air and surrounded by said vacuum chamber thereby permitting evacuation of air from said collection chamber substantially uniformly across the surface of said filter means;
- and
- air seal means sealably attaching said lid and said container to prevent a leakage of air therebetween.
3 more elements
Dependencies are inferred from the claim text.