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US 5,809,993 AGranted
Exhaust fan with dry lubricant coating
AssigneeGreenheck Fan Corporation
InventorsEmery W. Neitzel, Arnold S. Heil, David C. Dahl, Joseph A. Knoedler
Life of this patent
Estimating the term…
Abstract
An upblast exhaust fan for commercial kitchens is constructed with components that are coated with a dry lubricant. The non-stick surfaces that collect grease condensed from the hot cooking gases are easily cleaned with hot water during routine maintenance.
Claims8
In an exhaust fan having a motor driven fan surrounded by an enclosure which connects to an exhaust stack that conveys hot, grease-laden cooking gases from a kitchen, the improvement therein comprising:
- coating surfaces of the fan which are exposed to the cooking gases with a dry lubricant;
- and
- coating surfaces of the surrounding enclosure which are exposed to the cooking gases with a dry lubricant.
An exhaust fan for exhausting cooking gases from an exhaust stack, the combination comprising:
- a curb cap connected to the end of the exhaust stack and defining an opening through which the cooking gases flow;
- a centrifugal fan mounted over said opening and having fan blades which are rotated about an axis to direct the cooking gases radially outward;
- and
- a windband mounted to the curb cap and extending away therefrom to define an annular space that surrounds the centrifugal fan;
- wherein the fan blades, a surface on the curb cap, and a surface on the windband are coated with a dry lubricant that facilitates the removal of condensed grease therefrom.
2 more elements
Dependencies are inferred from the claim text.