Patent ID: 11873820
Assignee: REGAL BELOIT AMERICA, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 21:
22. A blower comprising:
a blower housing;
an impeller within the blower housing, the impeller being rotatable about an impeller axis, the impeller axis defining perpendicular axial and radial directions;
the impeller comprising a backplate, impeller blades, and a ring;
the backplate of the impeller having a backplate front surface and a backplate back surface;
the ring having a ring front surface and an outer circumference, the ring being spaced axially forward of the backplate;
the impeller blades having radially outer ends that combine to define an impeller outer circumference, the impeller outer circumference having an impeller outer diameter, each of the impeller blades extending axially forward from the ring to an impeller blade forward end of the respective impeller blade;
the impeller having an impeller exhaust width, the impeller exhaust width being defined as an axial distance between the ring outer circumference and the impeller blade forward ends;
the blower housing comprising a scroll back wall spaced axially rearward of the impeller, and a scroll front wall axially forward of the impeller;
the blower having a scroll width, the scroll width being a greatest axial distance from the scroll front wall to the scroll back wall at the impeller outer circumference;
a ratio of the scroll width to the impeller exhaust width being not less than 1.5 and not greater than 4.0.