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US 6,309,192 B1Granted
Insulated box fan
AssigneeLasko Holdings, Inc.
InventorCharles Litvin
Life of this patent
Estimating the term…
Abstract
An insulated box fan, which includes an outer metal housing with two vertical metal brackets to which a plastic isolator ring is attached, and which ring is also attached to the fan motor, to electrically insulate it from the fan housing, and to direct additional cooling air to the fan motor.
Claims4
In combination with a box fan which includes a rectangular metal outer housing, at least one grill on said housing, a pair of spaced vertical metal brackets connected to said housing, a fan motor having a front casing and a rear casing, the improvement which comprises
- an electrically insulating ring,
- said ring is connected to said fan motor rear casing by at least one screw, which passes through said ring into said rear casing, and
- said ring is connected to said brackets by at least two screws, which pass through said brackets and are engaged in said ring.
Dependencies are inferred from the claim text.