Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Casing having tangential inlet or outlet
Patent
1987-07-22
1989-09-19
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Casing having tangential inlet or outlet
4152141, F04D 2962
Patent
active
048676403
ABSTRACT:
An improved fan of the centrifugal type for bathrooms and the like has a housing with a base wall and four depending side walls. An exhaust outlet fitting in one of the walls has an integral centrifugal fan outlet cutoff. A venturi plate, positioned within the side walls and parallel but spaced from the base wall contains an inlet opening for the fan. The portion of the plate surrounding the opening is formed as a venturi. The inlet opening is spanned by a strut means to support the motor driving the centrifugal impeller. The struts have a generally T-shaped configuration so as to be removed from the portion of the opening adjacent the exhaust outlet fitting, thereby to enhance the efficiency of the fan. The base wall and one of the sidewalls contains reinforced holes for receiving the wiring. A flap in the housing covers the one of the holes not used for wiring connection purposes. The holes are located adjacent a corner of the housing and a corner separator separates the holes, flap, and associated wiring from the remainder of the housing.
REFERENCES:
patent: 2710573 (1955-06-01), Marker
patent: 3606593 (1971-09-01), Steiner
patent: 3698833 (1972-10-01), Cann et al.
patent: 3732030 (1973-05-01), Mullings
patent: 3743439 (1973-07-01), Cann
patent: 3926537 (1975-12-01), Piper
patent: 4073597 (1978-02-01), Barnhart et al.
Jonas Kenneth J.
Kuhnke Thomas A.
Penlesky Robert G.
Wolbrink David W.
Broan Manufacturing Co. Inc.
Garrett Robert E.
Pitko Joseph M.
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