Incubator with pyramidal top portion

Claim 1

An incubator, comprising: a shallow lower compartment containing means for supporting eggs therein, including means for rotating the eggs through a selected angle; an upper compartment comprising a base plate and a top cover portion extending over and above said base plate, said upper compartment including an opening around the periphery of said base plate adjacent the lower edge of said top cover portion and a central opening in the base plate, so as to permit air communication between said upper and lower compartments through said central opening and said peripheral opening; a cylindrical wall means extending upwardly from about said central opening and downwardly slightly below the lower surface of said base plate; a horizontal air baffle plate, separate from said top cover portion, being positioned above, but relatively close to, the upper edge of said cylindrical wall means, said horizontal baffle plate being substantially larger than the cross-sectional area of said cylindrical wall means but substantially smaller than the area of said base plate; heating means located substantially closer to the upper edge of said cylindrical wall means then to said peripheral opening; and fan means located in said cylindrical wall means for circulating the air between said upper and lower compartments through said central opening and said peripheral opening, so that warm air circulates about the eggs in the lower compartment.