Patent ID: 11913460
Assignee: GREENHECK FAN CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 12:
13. An exhaust fan assembly comprising:
a) an outer housing;
b) a fan housing mounted within the outer housing and including a first half-piece joined to a second half-piece; and
c) a fan wheel and an electric motor operably coupled to the fan wheel, the fan wheel and electric motor being mounted within the fan housing, the fan wheel including a plurality of radially extending arm portions extending between a fan blade portion and a central hub portion mounted to a shaft of the electric motor, wherein the electric motor is directly mounted to the second half-piece such that a body of the electric motor is located between the central hub portion and the second half-piece, such that the fan wheel is located entirely within the fan housing, and such that the central hub portion is located outside of an interior region defined by the fan blade portion;
d) wherein the fan housing defines an open inlet side within the first half-piece for accepting airflow in a direction generally parallel to a rotational axis of the fan wheel and an outlet for discharging airflow in a direction generally perpendicular to the rotational axis, wherein the fan housing defines a volute section with two flat sides extending to an outer perimeter having a continuously curved cross-sectional shape.