Ceiling fan
First Claim
1. An electric ceiling fan including fan motor means and rotatable fan blade means mounted around and adapted to be driven by said motor means, wherein the improvement comprises:
- wheel-like frame means mounting said motor means;
support means adapted to be attached to the ceiling;
hangar arm means connecting said support means and said frame means, said support means comprising a circular base plate for direct attachment to the ceiling and a circular adaptor removably connected to said hangar arm means, said base plate and said adaptor each having upper peripheral walls and said base plate further having a lower end wall extending from said base upper peripheral wall, said lower end wall being reduced for nesting within said adaptor upper peripheral wall, and interengageable means for removably securing said adaptor upper peripheral wall against said base plate end wall, said interengageable means including diametrically opposite bayonet slots extending through said adaptor upper peripheral wall and upwardly open outstanding struts having threaded openings formed therethrough depending from said base plate end wall whereby said bayonet slots are rotatingly engageable with said struts, and threaded fastener means passing through said adaptor upper peripheral wall and engageable in said strut openings;
air pervious upper guard means mounted on said frame means and enclosing said fan blade means and motor means, while permitting air flow to said fan blade means;
step motor means mounted on said frame means;
air pervious lower guard means mounted on and adapted to be driven by said step motor means beneath said frame means and including vane means for controlling air flow direction from said fan blade means; and
control means adapted to be connected across a power source and including switch means having electrical connections to said fan motor means and step motor means for energizing and deenergizing the same;
said fan having a maximum overall axial depth, from said support means to said lower guard means inclusive, of not more than about 10 inches, for maximizing headroom.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric ceiling fan of minimum practical axial depth for conserving needed head room includes a wheel-like frame; a fan motor nested therein; a fan blades assembly nested around and driven by such motor; a shallow support adapted to be attached directly to a ceiling; shallow hanger arms pivotally suspending the frame from the support for generally varying the air flow; a shallow, air pervious upper guard enclosing the motor and fan blades assembly; a step motor nested in the frame beneath the fan motor; a thin air pervious lower guard nested within the frame, driven by the step motor in the same direction as the fan blades assembly, but at much lower speed, and having radially spaced parallel vanes directing the downwardly flowing air in both axial and outwardly inclined, slowly revolving columns, for distributing the air over a wider area, while avoiding excessive air flow and "dead spots" beneath the fan; and a control mechanism including a separate switch for operating the step motor independently of the fan motor, a multi-position switch for stopping and selectively operating the fan motor at different speeds, a thermal switch for stopping the motors to avoid overheating, and a timer for both stopping and actuating the motors for continuous as well as predetermined periods of operation.
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Citations
24 Claims
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1. An electric ceiling fan including fan motor means and rotatable fan blade means mounted around and adapted to be driven by said motor means, wherein the improvement comprises:
- wheel-like frame means mounting said motor means;
support means adapted to be attached to the ceiling;
hangar arm means connecting said support means and said frame means, said support means comprising a circular base plate for direct attachment to the ceiling and a circular adaptor removably connected to said hangar arm means, said base plate and said adaptor each having upper peripheral walls and said base plate further having a lower end wall extending from said base upper peripheral wall, said lower end wall being reduced for nesting within said adaptor upper peripheral wall, and interengageable means for removably securing said adaptor upper peripheral wall against said base plate end wall, said interengageable means including diametrically opposite bayonet slots extending through said adaptor upper peripheral wall and upwardly open outstanding struts having threaded openings formed therethrough depending from said base plate end wall whereby said bayonet slots are rotatingly engageable with said struts, and threaded fastener means passing through said adaptor upper peripheral wall and engageable in said strut openings;
air pervious upper guard means mounted on said frame means and enclosing said fan blade means and motor means, while permitting air flow to said fan blade means;
step motor means mounted on said frame means;
air pervious lower guard means mounted on and adapted to be driven by said step motor means beneath said frame means and including vane means for controlling air flow direction from said fan blade means; and
control means adapted to be connected across a power source and including switch means having electrical connections to said fan motor means and step motor means for energizing and deenergizing the same;
said fan having a maximum overall axial depth, from said support means to said lower guard means inclusive, of not more than about 10 inches, for maximizing headroom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- wheel-like frame means mounting said motor means;
Specification