US2982198A

US2982198A - Ventilator

Info

Publication number: US2982198A
Application number: US773642A
Authority: US
Inventors: Harry L Mohrman
Original assignee: Chelsea Products Inc
Current assignee: Chelsea Products Inc
Priority date: 1958-11-13
Filing date: 1958-11-13
Publication date: 1961-05-02
Anticipated expiration: 1978-05-02

Description

m yen May 2, 1961 H. MOHRMAN 2,982,198

VENTILATOR Filed Nov. 13, 1958 2 Sheets-Sheet 1 4 25' 45; j- ..I Ar 1. 4

ATTORNEY y 1951 H L. MOHRMAN 2,982,198

VENTILATOR Filed Nov. 13, 1958 2 Sheets-Sheet 2 ORNEY VENTILATOR Harry L. Mohrman, Caldwell, N.J., asslgnor to Chelsea Filed Nov. 13, 1958, See. No. 773,642

3 Claims. f (Cl. 98-43) This invention relates to an exhaust device to be secured to the exhaust'opening of an object, as, for example, of a roof or other part of a building. Pursuant to the nvention, novel means are provided for effectively movmg a1r around and away from the motor to cool the same w1thout contamination by or mixture with air simultaneously exhausted out of said exhaust opening and by the fan wheel driven by the motor. The drawings show forms illustrative of the invention as hereinbelow more particularly described.

In the drawings:

Fig. 1 is a vertical, partly sectional view of a device embodying the invention, taken at line 11 of Fig. 4,

Fig. 2 is a fragmentary, enlarged, sectional view of another form of mounting for the motor housing shell on the deflector dome,

Fig. 3 is an enlarged perspective view of the mounting arrangement shown in Fig. 1,

Fig. 4 is a fragmentary, transverse sectional view, taken at line 4-4 of Fig. 1,

Fig. 5 is a fragmentary, sectional view of the motor, the dome, motor housing and associated parts of a modified form of the invention,

Fig. 6 is a fragmentary, perspective view of the top of a motor dome of a further form thereof, and

Fig. 7 is a fragmentary, sectional view of the motor dome and motor housing in another form of the invention.

As shown in the drawings, the exhaust device 15 of this invention is adapted for registry with the air exhaust opening, such as opening 10 (Fig. l) of a roof or other object 11 to which the device of this invention may be secured. Said device 15 has a fan wheel 16 in spaced alignment with a motor 17 (or a motor driven shaft) and actuated thereby, a motor housing shell 18 encircling the motor and spaced therefrom, and a motor dome 19 secured in overlying spaced relation to the motor housing shell 18 as for example by securing the complementary registering

flanges

20, 21 of

members

18, 19 together (in the Fig. 1 form) by interengaging latch means such as bolts or the like 22. In that arrangement the flow of atmospheric air' will be, as noted by the arrow 23, between the motor housing shell 18 and the motor dome 19 and around the motor 17, cooling the motor on actuation of the device. Fan 33 moves such air, cooling the motor, downwardly as noted at 27 within the motor housing shell 18, to mingle at 34 with atmospheric air drawn as at 26 between the lower end of the motor housing shell 18 and the deflector dome 24, mingling then as at 28 interiorly of dome 24 with the evacuated air drawn as at 30 by fan 16, and being swept therewith out of the lower end of the dome 24 as at 31 by the action of fan 16.

The deflector dome 24 is disposed in the device to cover the perimeter of the fan wheel 16 in spaced relation thereto and deflect air exhausted thereby to the atmosphere. A separator plate 25 (Figs. 2 and 3) is disposed intermediate the motor housing shell and fan wheel and proportioned to substantially define a lower wall for the motor housing shell 18 enclosing the motor and separating it'from the fan wheel.

. United States Patent 0 2,982,198 Patented May 2, 1961 In the form shown in Figs. 1 and 3 means are provided for securing the motor base or separator plate 25 to the deflector dome 24 in spaced relation, so that air from the interior of motor housing shell 18, moving downwardly as at 34 will mingle with atmospheric air moving inwardly of the device through the opening 26 (Fig. 1) and dome 24, said mingled air then flowing into the deflector dome as noted by the arrow 28 in Fig. l, on actuation of the device.

Where it is desired to seal the motor and air flowing around-the motor from air exhausted by fan 16 from opening 10, the separator plate 25 (Fig. 2) may be secured directly to the fan wheel deflector dome 24, sealing the same at the point 34 which, in the Fig. 1 form, is

open.

In the Fig. 1 construction, the shaft of motor 17 is extended as at 32 at the top of the motor; fan 33, keyed to said extended shaft 32, is pitched to direct the flow or" air downwardly (27). In the Fig. 2 construction, fan 33 would be a centrifugal fan such as the blower type shown at 16 in Fig. l, to ventilate the space under the motor housing 18, moving such heated air out of the device, between the

fianges

20, 21 in a reverse direction to that indicated by arrow 23 in Fig. 1.

The separator plate 25 may be proportioned to substantially define a lower wall for the motor housing shell 18 (Fig. 1), separating the motor from the fan wheel, as above mentioned. The circumferential edge (Fig. l) of the separator plate 25 terminates short of the motor housing shell 18 and may be secured directly against (Fig. 2) or in spaced relation to (Figs. 1 and 3), the deflector dome 24 by any suitable means such as rubber shock mounts 36 secured to the parts by suitable bolt members such as 35. The deflector dome 24 and parts associated therewith may be secured by bolt members 37 or the like to a barrel assembly 38 which, in turn, may be secured, as at 39, to a curb cap 40 secured to the curb base 41 in any desired or convenient manner. The device may be provided with rails 42, 43 (Fig. 4) extending transversely above the fan wheel and secured to the device as shown at 44, 45 and the motor secured to bracket 46. The bracket 46 might, instead, serve as a bearing for a motor shaft (where a belt drive, for example, is used). Complementary means 47 may be provided on the bracket and rails to secure the motor at the desired position on the rails. In the Pigs. 5-7 forms the motor dome is keyed as at 50 to the armature shaft of the motor 17 and is provided with the blades 51 which may be separate parts suitably secured thereto as in Fig. 5 or may be formed by pressing the material of said dome 19 inwardly to unitarily form said blades as shown at 51a in Fig. 6. In the Fig. 7 form, the blade 51b is formed unitarily with the dome 19 by forcing the material of the marginal flange of said dome inwardly as shown.

The term motor in this specification and claims shall be deemed to mean either a motor such as shown at 17 or a motor driven shaft for rotating the fan wheel 16.

Examples of practical devices embodying the invention are described herein and shown in the accompanying drawings; the invention is not limited thereto, but covers all other forms coming within the scope or purview of the disclosure herein.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A ventilator device for drawing air from an opening in, and defined by, a hollow deflector dome extending from a structure, said device comprising, means supporting said dome from said structure in spaced relation to V and overlying said opening, a motor, a shell housing said motor, means engaging said shell and securing the lower end thereof to the top of the deflector dome in spaced relation therewith for the flow of air therebetween, a motor support bracket, shock mounts positioned between said bracket and the deflector dome, a fan wheel operable by said motor and operating within the deflector dome, a separator plate proportioned to extend beyond the inner edge of the deflector dome, means securing the :outer marginal portion of said separator plate to the -inner marginal portion of said deflector dome, a carrier said motor shell and overlying said motor, said cap having a dependent flange overlying the upper edge portion of said shell and leaving a space with respect thereto to allow for the flow of air therebetween, means to cause circulation of air through said space, said means forming part of the cap to act as a fan to cause the circulation of air through the space between the cap flange and the motor housing shell.

2.' In a ventilator device as set forth in claim 1, wherein said means forming part of the cap to act as afan comprises blades on the undersurface of the cap.

3. In a ventilator device as set forth in claim 1, wherein said depending flange ofthe cap is formed unitarily with blade means formed inwardly of the cap form such a fan, said blade means formed inwardly of the cap comprising said means forming part of the cap to act as a fan.

References Cited in the'file of this patent UNITED STATES 'PATENTS 2,526,290 .Solzman Oct. 17, 1950 2,582,902 Gohl Jan. 15, 1952 2,656,973 Sutherland Oct. 27, 1953 2,711,682 Dreschel June 28, 1955 2,735,611 McLean Feb. 21, 1956 2,767,904 Doyle Oct. 23, 1956 2,774,293 Jenn Dec. 18, 1956 2,777,382 Solzman Jan. 15, 1957 2,823,598 ,Ienn, Feb. 18,1958 2,884,185 'Dolan Apr. 28, 1959