US 3469772 A
Description (OCR text may contain errors)
l 0, 1969 D. A. M DONALD AIR MOVING APPARATUS 4 Sheets-Sheet 1 Filed July 19, 1967 Inventor DONALD ANGUS McDONALI) Attorney p 30, 1969 o. A. M DONALD 3,469,772
AIR MOVING APPARATUS Filed July 19, 1967 4 Sheets-Sheet 2 Inventor DONALD ANGUS Mc DONALD p 1969 D. A. MCDONALD 3,469,772
AIR MOVING APPARATUS Filed July 19, 1967 4 Sheets-Sheet N N w 0 1 i 1\ I X I S I l a /'r a T 5'. B1 J- I -1 91 Q m l I M l & v 0.
Q3 LL Inventor Attorney Sept. 30, 196g A. MCDONALD 3,469,772
AIR MOVING APPARATUS 4 Sheets-Sheet 4 Filed July 19. 1967 Inventor DONALD ANGUS Mc DONALD United States Patent 3,469,772 AIR MOVING APPARATUS Donald A. McDonald, Sandriugham House, Shirley St., Nassau, Bahamas Filed July 19, 1967, Ser. No. 654,460 Int. Cl. F04d 25/08, 25/16; F04b 39/00 US. Cl. 230-117 1 Claim ABSTRACT OF THE DISCLOSURE A cased in air moving apparatus including a pair of coaxial centrifugal fan elements driven by a motor mounted therebetween and in the casing, which is adapted to be suspended from above at various angles, an outlet tangential of the fan elements and dispelling air outwardly in desired different directions.
Background of invention According to this invention there is provided air moving apparatus comprising a. casing having mounted therein a pair of coaxially disposed centrifugal fan elemnts, with a single motor mounted between said fan elements and adapted to rotate same to cause air to be dispelled through an outlet disposed tangentially of the fan elements, said casing having means thereon whereby it can be suspended from above at various angles so that air can be dispelled downwardly in different directions as required.
The motor is preferably mounted between spaced transverse walls disposed centrally of the casing by means of rubber or the like resilient means so that the motor is substantially quiet and vibration free in operation. Moreover these Walls are apertured or otherwise arranged to permit a good circulation of air around the motor, thereby enabling it to run at a very low temperature, and thus prolonging its life.
The casing may be of generally elongated cylindrical shape with a tangential outlet duct. This duct would, in use, normally be directed downwardly at a required angle.
The suspension means may comprise hooks or the like disposed in the opposite ends of the casing which can selectively be engaged with links of suspension elements such as chains, apertured straps or the like.
A light fitting may also be incorporated in the apparatus.
Brief description of drawings Air moving apparatus in accordance with one embodiment of this invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIGURE 1 is an underneath perspective view of the apparatus,
FIGURE 2 is an end view of the apparatus,
FIGURE 3 is an exploded view of the apparatus being drawn on a somewhat smaller scale,
FIGURE 4 is an enlarged longitudinal sectional view through the apparatus on the line IV'IV in FIGURE 6,
FIGURE 5 is a section on the line VV in FIGURE 4 and FIGURE 6 is a view in the direction of the arrows VIVI in FIGURE 4, the left hand half of the casing, as viewed in FIGURE 4, and the fan element therein having been removed.
Description of shown embodiments For convenience a light fitting has only been shown in FIGURES l and 2.
The air moving apparatus shown in the drawings includes an elongated casing 1 of generally cylindrical shape with a tangential outlet duct 2 extending the whole length thereof, the outer end of this duct being closed by a grille 3, which may be of any desired form.
Centrally the casing 1 includes a pair of spaced transverse walls 4 between which is mounted an electric motor 5 with coaxial rotary shafts 6 extending through said walls 4. Fixed on the shafts 6 in the opposite end halves of the casing 1 are drum like centrifugal fan elements 7, the open ends thereof registering with apertures 8 in end plates 9 of the casing.
The mounting of the motor 5 includes on each side thereof four rubber or the like resilient support blocks or the like 10 which fit into apertures 11 formed in the walls 4 so that in operation the motor 5 will be quiet or substantially so. Where the walls 4, between which the motor is mounted, extend into the outlet duct 2 they are narrowed, as at 12, so that the total effective area of the actual outlet is not reduced. Moreover, good circulation of air is provided around the motor thus ensuring a long life therefor.
On each of the opposite end plates 9 of the casing there are provided a pair of hooks, pins or the like 13 which can be engaged by a suspension element such as a chain 14, apertured strap or the like.
It is envisaged that, in normal use, the apparatus will be suspended from a wall bracket or the ceiling of a room (as in FIGURE 1) for example above a bed, desk or the like, suspension hooks being secured in the ceiling. By selectively engaging the suspension elements 14 with the hooks, pins or the like 13 on the end plates 9 of the casing 1 the angle at which air will be dispelled downwardly can be varied as required. The dispersion of air downwardly increases progressively so that the overall cooling effect is not limited to one small area. What is more, air is directed towards a person being cooled gently and without the creation of a draught or blast of air which in itself can cause considerable discomfort.
The casing 1 as shown is actually manufactured from synthetic plastics material. It is formed from a plurality of moulded parts adapted rigidly to be fitted together with the motor and fan elements in position therein. A lead for the motor (not shown) is taken off at any convenient point.
Thus, more specifically, the casing 1 is made up, as clearly shown in FIGURE 3, by two central sections 20 and 21 and two end sections 22 and 23, each twq sections being mirror images one of the other. The central sections 20 and 21 however, differ in one slight detail; on the section 20 are provided spigots 24 (as indicated in FIGURE 6) which fit into sockets 25 (FIGURE 3) in the section 21, thereby securing the two sections together.
The walls 4 are included in the central sections 20 and 21 being joined to the curved peripheral walls thereof by apertured webs 26 which permit circulation of air around the motor as referred to above. The end walls 9, with apertures 8 therein, are provided by the end sections 22 and 23.
The tangential outlet 2 is formed on fitting the central and end sections 20 to 23 together and int-o this fits the grille 3, which is also moulded as a separate section. Centrally the grille 3 provides a mount 27 for an electric control switch 28.
The resilient supportblocks or the like 10 assist during shipment in protecting the various component parts against breakage.
A light fitting may be incorporated in the apparatus as above described. As shown in FIGURES 1 and 2 this may comprise a tubular lamp 30 mounted adjacent the outlet 2. A shade 31 may be provided for the lamp 30 and this shade may be fixed (as shown) or adjustable in position.
There may be occasions when it is not desired to have the air cooling apparatus overhead, as described above. Then the apparatus can simply be rested on a pad, block or the like with the outlet duct disposed at any desired angle.
1. In an air moving apparatus including an electric motor and a fan located at each side thereof and driven thereby, the improvement comprising in combination, two coaxially aligned substantially volute casing bodies in mutually reversed position having a duct for air moving out of the apparatus tangentially to the fans located therein; an end Wall closing each casing body at neighboring ends thereof, each end wall mutually complementing the other to house and resiliently support the motor said end walls provided with apertures, said motor having resilient support members extending into said apertures, and a pair of cover members, each cover member forming with an opposing end wall of said casing bodies a chamber for a fan and having at least one opening for air being sucked in by the rotating fans.
References Cited ROBERT M. WALKER, Primary Examiner US. Cl. X.R.