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Publication numberUS2787207 A
Publication typeGrant
Publication dateApr 2, 1957
Filing dateJun 1, 1953
Priority dateJun 1, 1953
Publication numberUS 2787207 A, US 2787207A, US-A-2787207, US2787207 A, US2787207A
InventorsMoore Walter E
Original AssigneeKnapp Monarch Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Twin window fans
US 2787207 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

A ril 2, 1957 w. E. MOORE 2,787,207

TWIN WINDOW FANS Filed June 1, v19??! 7 2 Sheets-Sheet l 11/ It oore 1 75. 2. d gajfl mda 2i MZ'ZJS,

April 2, 1957 w. E. MOORE 2,787,207

TWIN WINDOW FANS Filed June 1, 1953 2 Sheets-Sheet 2 P7 P/E.3.

- li z nzorx Zflalfzr 'EMOOTZ United States Patent TWIN WINDOW FANS WalterE. Moore, Eelnor, Mm, assignor to Knapp-Monarch (Company, St. Louis, Mo., a corporation of Delaware Application June 1, 1953, Serial No. 358,739

3 Claims. (CI. 98-94) This invention relates to a multi-purpose design of twin window fans and particularly to a fan structure having a supporting means which enables one fan unit to be supported in a casement window opening and another similar fan unitto be supported therein in tandem below the first one, as well as enabling the fan unit to be used as a floor or desk fan.

One object of the invention is to provide supporting means for a fan housing in which a motor is mounted, together with a fan driven thereby for drawing air into one face of the housing and discharging it from the other.

Another object is to provide supporting means in the form of a pair of bails which are pivoted to opposite sides of the fan housing so that the housing can be supported vertically or horizontally as desired, or at any angle in between, vertical and horizontal or the bails may be adjusted for suspending one fan in a Window opening and a second one from the first.

Still another object is to provide bail-like supports having serrated ends which are pivotally mounted relative to opposite ends of the fan housing and a clamp means to clamp them together for locking the pivotal connections with the bails in any desired angular relation to each other.

A further object is to provide a fan structureparticularly adaptable for support by means of a bail in position against a window screen, with a second unit bailsuspended below the first if desired.

With these and other objects in view, my invention consists in the construction, arrangement and combination of the various parts of my invention, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, wherein:

Figure 1 is a perspective view of two of my window fans mounted in vertical tandem on a casement window.

Figure 2 is a detail front elevation of that portion of Figure 1 within the circle 2 showing the coaction of supporting bails for two of the twin window fans in relation to each other.

Figure 3 is an enlarged end view of a portion of Figure 1 looking in the direction of the arrow 3 thereon to show a supporting flange for the window fans.

Figure 4 is an enlarged horizontal sectional view on the line 4--4 of Figure 1 showing a supporting clip for the fan housing.

Figure 5 is a front elevation of a portion of the supporting flange of Figure 3.

Figure 6 is a perspective view of one of the fan units showing it supported on a floor surface with the housing in a vertical position.

Figure 7 is a similar perspective view showing the housing in a horizontal position.

Figure 8 is an enlarged vertical sectional view on the line 8-8 of Figure 1 to show the clamping means for the pivotal connection of the bails; and

2,787,207 Patented Apr. 2, 1957 Figure 9 is a face view of one of the serrated ends of the bails.

On the accompanying drawings I have used the reference numeral 10 to indicate in generala casement window. One of the sections thereof is open and the open ing is screened as at 12 in the usualmanner. My twin window fans are particularly designed for vertical tandem support against such a screen and will now be described.

Each of the fan units comprises a housing 14 having a rear grille 16 and a front grille 13 through which air may circulate, the grilles serving as a guard for the fan blades 24 within the housing 14 driven by the usual electric motor 22. Suitable supports 24 are provided for the motor.

For supporting the housing 14 I provide a pair of bails 26 and 28. Each bail has an eye 30 formed at one end and the face thereof is serrated as indicated at 32 in Figure 9. The serrations of the two bails are opposite as shown in Figure 8. These bails are adapted to be clamped together by a knob 34 from which a screw 36 projects, the screw being threaded into a hub 38 secured to one end of'the housing 14. The opposite end likewise has a hub 38 andalocking knob 34..

The bails 26 and 28 may be adjusted as in Figures 6 and 7 for using the fan unit as a desk or floor fan or the like. As adjusted in Figure 6, the air flow will be horizontal. As adjusted in Figure 7, it will be vertical and of course the housing 14 may be adjusted to any angle in between these two for directing the air at any desired angle in a vertical plane.

The bails 26 and 28 may also be adjusted as in Figure 1 so that the bail 28 may support the upper fan unit as by reception thereof in'hook portions 40 of a supporting flange 42. The flange 42is adapted to be inserted between the window frame 10 and the frame of the screen 12 as illustrated, and has openings 43 for screws 45 into the window frame if desired for permanent mounting purposes. Usually it is suflicient to merely slide the bracketbetween the screen and the easement window so that it hangs on the screen.

To restrain the grille 18 of the upper fan unit against moving forward through the'screen 12, a pair of clips 44 may be provided as in Figure 4 and held in position by screws 46 so as to project to a position such that the grille 1% can engage these clips rather than the screen.

The second or lower fan unit may then be supported in relation to the first one by hooking its bail 28 over the depending bail 26 of the upper fan unit. The two units may be supported in reversed relation to each other as shown in Figure 1 so that the upper one circulates the air outwardly and the lower one circulates it inwardly, thus providing very efficient circulation of air through the easement window.

In order to reverse the position of either fan, it is merely necessary to remove it from its hanging position, turn it around then again hang it in position. In casement applications it is of course necessary to loosen the adjusting knobs 34 slightly, spread the bails 26 and 28 and then retighten the knobs.

In other types of windows, the housings 14 may be supported either on the Window sill with the bails 26 and 28 adjusted as in Fig. 6 and standing thereon or the housings 14 may rest directly on the window sill in side-byside relation thus providing for a horizontal tandem arrangement as distinguished from a vertical tandem arrangement, as shown in Fig. 1.

Two of the fans of course can be supported side by side and either one can be picked up and turned backwards so that without using a reversible motor the fans can both exhaust or intake, or one may exhaust and the other intake as desired.

When the knobs 34 are tightened they bring the serrations 32 into engagement with each other so that one of the bails is locked with respect to the other but the housing 14 can still be rocked as from the position of Fig. 6 to the position of Fig. 7 without loosening the knobs 34 or at least with very little loosening thereof. To prevent undue vibration the bails 26 and 28 at their corners are covered with rubber tubing as indicated at 48 and this will prevent vibration on the floor, the desk or the window sill and likewise when one fan hangs below the other it prevents the transmission of vibrations from the second one to the first one.

From the foregoing specification it will be obvious that I have provided a comparatively simple supporting means for a fan housing so that two of them can be arranged in vertical tandem as shown in Figure 1 or the fan units can be used individually as in Figures 6 and 7 as desired. I have provided an efficient locking means for the pivotal connections of the bails to the housing so that any desired adjustments thereof can be made to support the fan at various angles and in various desired arrangements.

Some changes may be made in the construction and arrangement of the parts of my twin window fans without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

1. In twin window fans, a pair of open-ended housings adapted to be positioned in a window opening, a motor in each thereof, a fan driven by each of said motors to draw air into one end of each housing and discharge it from the other, and means for supporting said housings comprising for each housing a pair of bails each comprising a pair of arms and a connecting member at the outer ends of said arms, the inner ends of said arms being pivoted to its housing adjacent the centers of the sides thereof for adjustment to spread 180 apart, one of said bails of one housing having hook portions at the junctions of its arms and connecting members to en gage one of the bails of the second window fan to support the two in vertical tandem with the upper bail of the upper housing supporting both housings, and means for locking the pivotal connections of said bail arms to said housings.

2. In twin window fans, a pair of open-ended housings adapted to be positioned in a window opening, a motor in each of said housings, a fan driven by each motor to draw air into one end of each housing and discharge it from the other, and means for supporting said housings comprising a pair of bails on each housing and each comprising a pair of arms and a connecting member at the outer ends of said arms, one of said bails of one housing having hook portions at the junctions of its arms and connecting members to engage one of the bails of a second window fan to support the two in vertical tandem with the upper bail of the upper housing supporting both housings.

3. In a fan structure, an open-ended housing, a motor therein, a fan driven by said motor to draw air in the one end of said housing and discharge it from the other, a pair of U-shaped bails for supporting said housing, said bails having the extremities of their arms pivoted to opposite ends of the housing adjacent the center thereof and capable of being spread to diametrically opposite positions, and clamp screw means to lock the pivot adjustments, one of said bails having a hook portion to engage a hail of another fan structure to support one below the other when said bails are spread to said diametrically opposite positions.

References Cited in the file of this patent UNITED STATES PATENTS 595,284 Baum Dec. 7, 1897 611,190 Abernathy Sept. 20, 1898 2,123,448 Weber July 12, 1938 2,451,193 Brandenburg Oct. 12, 1948 2,453,009 Sanger et a1. Nov. 2, 1948 2,525,853 Bauer Oct. 17, 1950 2,544,281 Seil Mar. 6, 1951 2,620,126 Lyne Dec. 2, 1952 2,633,293 Jones Mar. 31, 1953 2,660,368 Schmidt et al Nov. 24, 1953 OTHER REFERENCES Advertisement by W. W. Welch Co., Aug. 14, 1951. (Copy in Div. 49.)

Patent Citations
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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2857095 *Feb 21, 1956Oct 21, 1958Gilbert Co A CAll-purpose fan
US2995077 *Sep 30, 1957Aug 8, 1961Kitson Gerald LVentilating system
US4341151 *Jul 1, 1980Jul 27, 1982Matsushita Seiko Co., Ltd.Electric fan
US4773310 *Dec 1, 1986Sep 27, 1988Howard CorwinFan ventilator having multiple modes of operation
US5190496 *May 1, 1991Mar 2, 1993Holmes Products Corp.Window fan
US5334091 *Sep 24, 1992Aug 2, 1994Holmes Products Corp.Window fan
US5425671 *Sep 7, 1993Jun 20, 1995Holmes Products Corp.Window fan
US5730651 *Aug 8, 1996Mar 24, 1998Lakewood Engineering And Manufacturing Co.Independent directional-flow air ducts for low-profile window fan
US5829956 *Apr 22, 1997Nov 3, 1998Chen; YungFan blade assembly
US20130315727 *May 24, 2012Nov 28, 2013Edwin HoStackable fan
DE202008014288U1 *Oct 27, 2008Apr 1, 2010Wildeboer, Werner, Dipl.-Ing.Installationsvorrichtung für dezentrale Raumlüftungssysteme
U.S. Classification454/209, D23/371
International ClassificationF04D29/60, F04D29/64
Cooperative ClassificationF04D29/646
European ClassificationF04D29/64C2