Electric resistance heating devices – Heating devices – Convection space heater
Reexamination Certificate
2006-05-09
2006-05-09
Jeffery, John A. (Department: 3742)
Electric resistance heating devices
Heating devices
Convection space heater
C416S095000, C219S541000
Reexamination Certificate
active
07043146
ABSTRACT:
An all season fan with heated circulating blades includes heating elements mounted in slots defined in the rear surface of the fan blades for heating of air blown outwardly therefrom. Resilient biasing devices such as a bow springs are mounted in the fan blades extending over the slots to retain the heating elements in the slots. Electrically conductive ball bearings are included to facilitate rotation of the fan blade and hub while simultaneously providing electrical power to the heating elements during fan rotation. At least two bearings each individually maintain separate electrically conductive abutment respect to two separate conductive rings mounted in an insulating insert within the fan hub. Each ring is electrically conductive with respect to one end of each heating element for heating thereof during fan rotation.
REFERENCES:
patent: 1737912 (1929-12-01), Bogard
patent: 1784528 (1930-12-01), Lidke et al.
patent: 2110621 (1938-03-01), Cohen
patent: 5230606 (1993-07-01), Chin-Fu
patent: 2002/0192075 (2002-12-01), Block
patent: 946211 (1999-12-01), None
patent: 942017 (1949-07-01), None
patent: 2172935 (1986-10-01), None
patent: 464906 (1951-04-01), None
Jeffery John A.
Sperry, Zoda & Kane
LandOfFree
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