Stoves and furnaces – Stoves – Cooking
Patent
1984-09-17
1985-12-03
Yeung, James C.
Stoves and furnaces
Stoves
Cooking
34218, 34225, 219400, 99443C, 99447, 416238, 416228, 432145, 432199, A21B 100
Patent
active
045560439
ABSTRACT:
An improved air delivery system is provided for an impingement food preparation oven including a plurality of air ducts disposed in a cooking chamber, a plenum connected to the air ducts, and a scoop-type fan disposed in a backwall opening of the plenum to provide a flow of heated air smoothly and uniformly through the plenum into the air ducts. The fan device includes a plurality of tear-drop shaped blades, wherein each blade has a leading edge portion that tapers to a point in the direction of rotation and a trailing row portion at a given pitch angle for forcibly moving the flow of air in an axial direction toward the plenum front wall. The plenum front wall has a plurality of openings connected to the duct members, and a centrally disposed conical surface projecting outwardly toward the fan so that the axially directed flow of heated air from the fan is smoothly and uniformly directed by the conical surface the plurality of air ducts so as to provide a uniform cooking temperature in the cooking chamber.
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Jeffers Albert L.
Lincoln Manufacturing Company, Inc.
Niewyk Anthony
Yeung James C.
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