Vaneless impeller housing for a vacuum cleaner
AssigneeShop Vac Corporation
InventorRobert C. Berfield
Life of this patent
Estimating the term…
Abstract
A vacuum cleaner includes a driven impeller that moves working air for the vacuum cleaner. A first housing includes a first wall and a second housing includes a second wall opposite the first wall, and an outlet for the working air. The impeller rotates and draws the working air through an opening and directs the working air radially outwardly toward the first wall and then through an annular passage formed between the first wall and the second wall. The annular passage restricts the flow of working air to provide back pressure on the impeller.
Claims6
A housing for an air impeller, the impeller arranged for moving working air from an inlet to an outlet of the housing, the housing comprising:
- a first housing member including a first wall and the inlet;
- a second housing member secured to the first housing member and including a second wall;
- the first wall and the second wall forming an annular passage within the outlet, and
- wherein the annular passage is substantially uninterrupted and unobstructed by vanes about a full circumference thereof, such that the working air is unobstructed by vanes through the outlet.
A vacuum cleaner comprising:
- a driven impeller, wherein the impeller moves working air for the vacuum cleaner;
- a housing in which the impeller rotates;
- an outlet for the working air;
- wherein the housing includes a first wall having an opening therein for admitting the working air, a second wall located generally radially outward from the impeller attached to the first wall, a third wall attached to the second wall, a fourth wall opposite the first wall, a and a fifth wall opposed the third wall and connected to the fourth wall;
- and
- wherein the fifth wall and the third wall form an annular passage that is substantially uninterrupted about a full circumference thereof.
The vacuum cleaner of 3, wherein a recess is located in the fourth wall and is adjacent to the fifth wall.
The vacuum cleaner of 3, wherein the annular passage has substantially constant width between an inlet and an outlet thereof, and wherein the annular passage serves as a restriction on the working air to provide back pressure.
The vacuum cleaner of 5, wherein the working air is unobstructed by vanes.
Dependencies are inferred from the claim text.