Carwash vacuum motor

A vacuum motor assembly comprising:

• a motor comprising a drive shaft;
• an impeller having a plurality of impeller blades spaced radially around a center portion of the impeller wherein the impeller has an impeller diameter and wherein the center portion is free of any of the plurality of impeller blades and the plurality of impeller blades are circumjacent the center portion of the impeller;
• an impeller cover spaced around the impeller wherein the impeller cover comprises:
• a front portion having a front portion central opening defined by an inner perimeter edge;
• a front portion inner surface;
• a forwardly extended channel section between the inner perimeter edge and a front portion outer perimeter edge, wherein the front portion outer perimeter edge extends away from the front portion inner surface toward the impeller;
• and a front portion air exhaust chute section;
• a back portion engaged to the front portion, wherein the back portion has front portion facing side and a back support facing side, a back portion inner surface, a back portion air exhaust chute section, an interior edge having an interior edge perimeter that defines a back portion opening that is larger than the impeller, and an outer perimeter edge engaged with the front portion outer perimeter edge to collectively form a spiral shaped airflow channel located about a perimeter of the impeller cover, wherein the spiral-shaped airflow channel starts with a tapered end, extends around the impeller cover, and then into an air exhaust outlet formed by engagement of the front portion air exhaust chute section and the back portion air exhaust chute section together;
• wherein a front surface of the impeller defines a vertical plane and a first air channel interior distance from the front portion inner surface to the vertical plane within the spiral-shaped airflow channel is greater than a second air channel interior distance from the back portion inner surface to the vertical plane;
• and
• a back support having a back support perimeter, a motor-facing side and an impeller-facing side, wherein the impeller-facing side of the back support is engaged with the back support facing side of the back portion around the back portion opening such that the back support covers the back portion opening, wherein the motor-facing side is engaged with the motor, wherein the back support further comprises a drive shaft receiving aperture;
• wherein when the back support is fixedly engaged to the motor;
• and wherein the drive shaft passes through the drive shaft receiving aperture of the back support and engages with the impeller.

A method of replacing a component of a vacuum motor assembly without removing an impeller of the vacuum motor assembly from engagement with an impeller, the method comprising the steps of:

• disengaging a first back support from engagement with a first impeller cover spaced around the impeller, wherein the first impeller cover comprises:
• a front portion having a front portion central opening defined by an inner perimeter edge;
• a front portion inner surface;
• a forwardly extended channel section between the inner perimeter edge and a front portion outer perimeter edge, wherein the front portion outer perimeter edge extends away from the front portion inner surface toward the impeller;
• and a front portion air exhaust chute section;
• a back portion engaged to the front portion, wherein the back portion has front portion facing side and a back support facing side, a back portion inner surface, a back portion air exhaust chute section, an interior edge having an interior edge perimeter that defines a back portion opening that is larger than the impeller, and an outer perimeter edge engaged with the front portion outer perimeter edge to collectively form a spiral shaped airflow channel located about a perimeter of the first impeller cover, wherein the spiral-shaped airflow channel starts with a tapered end, extends around the first impeller cover, and then into an air exhaust outlet formed by the engagement of the front portion air exhaust chute section and the back portion air exhaust chute section together;
• wherein the first back support has a first back support perimeter, a motor-facing side and an impeller-facing side, wherein the impeller-facing side of the first back support is engaged with the back support facing side of the back portion around the back portion opening such that the first back support covers the back portion opening of the first impeller cover, and wherein the motor-facing side is engaged with a motor, wherein the first back support further comprises a drive shaft receiving aperture;
• and wherein when the first back support is fixedly engaged to the motor a drive shaft of the motor passes through the drive shaft receiving aperture of the back support and engages with the impeller that is positioned between within the first impeller cover;
• and
• replacing either or both of (1) all or a portion of the first impeller cover with all or a portion of a second impeller cover or (2) the first back support with a second back support;
• wherein the second impeller cover comprises:
• a front portion having a front portion central opening defined by an inner perimeter edge;
• a front portion inner surface;
• a forwardly extended channel section between the inner perimeter edge and a front portion outer perimeter edge, wherein the front portion outer perimeter edge extends away from the front portion inner surface toward the impeller;
• and a front portion air exhaust chute section;
• a back portion engaged to the front portion, wherein the back portion has front portion facing side and a back support facing side, a back portion inner surface, a back portion air exhaust chute section, an interior edge having an interior edge perimeter that defines a back portion opening that is larger than the impeller, and an outer perimeter edge engaged with the front portion outer perimeter edge to collectively form a spiral shaped airflow channel located about a perimeter of the first impeller cover, wherein the spiral-shaped airflow channel starts with a tapered end, extends around the first impeller cover, and then into the air exhaust outlet formed by the engagement of the front portion air exhaust chute section and the back portion air exhaust chute section together;
• wherein the second back support has a second back support perimeter, the motor-facing side and an impeller-facing side, wherein the impeller-facing side of the second back support is engaged with the back support facing side of the back portion around the back portion opening such that the back support covers the back portion opening, and wherein the motor-facing side is engaged with a motor, wherein the first back support further comprises a drive shaft receiving aperture;
• and wherein when the first back support is fixedly engaged to the motor a drive shaft of the motor passes through the drive shaft receiving aperture of the back support and engages with the impeller that is positioned between within the second impeller cover;
• wherein a front surface of the impeller defines a vertical plane and a first air channel interior distance from the front portion inner surface to the vertical plane within the spiral-shaped airflow channel is greater than a second air channel interior distance from the back portion inner surface to the vertical plane;
• and
• wherein the impeller has a plurality of impeller blades spaced radially around a center portion of the impeller wherein the impeller has an impeller diameter and wherein the center portion is free of any of the plurality of impeller blades and the plurality of impeller blades are circumjacent the center portion of the impeller.