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Nov. 13, 1962
Filed May 15, 1959
4 Sheets-Sheet 1
f 26
Nov. 13, 1962
Filed May 15, 1959
4 Sheets-Sheet 2
30 23 56W”) a? B7???
55 5a
Geoncse M. BQEIDE QT
‘Nov. 13, 1962
Filed May 15, 1959
4 Sheets-Sheet 3
(3501266 M. BQEIDEIILT
Nov- 13, 1962
Filed May 15, 1959
4 Sheets-Sheet 4
650265 M. 1525/0527
Patented Nov. 13,, 1962
suitable manner. The louvers de?ne air outlet passage
ways therebetween and the topmost of the louvers, in co
George M. Breidert, Granada Hills, Qali?, assignor to
The G. C. Breidert Co., San F ernando, Calif” 21 corpo
operation with the adjacent upper structure, also de?ne
an air outlet 26 from the hood 25.
The hood 25 is removably or swingably supported on
the body Ill so that it may provide easy access to the
ration oi’ California
Filed May 15, 1959, Ser. No. 813,391
3 Claims. (CI. 98-43)
interior of the body. The hood has a flat top wall 26,
upwardly converging side and end walls 27 and a ?at base
?ange 28 having a depending ?ange 29.
This invention has to do with roof ventilators of the
Bars 36) are struck out of side and end walls 27 of the
type which houses one or more motor-driven air irn~ 10
hood and bent outwardly to provide hooded air inlet
pellers as well as the motor.
openings 31 for entry of air into the hood.
Inasmuch as such ventilators are mounted on the roofs
of buildings, they are frequently exposed to high winds
A bracket 35 is carried by each of the corner posts,
upon each of which brackets a resilient rubber-like pad
which tend to damage or displace them, which danger in
creases in proportion to the extent that the ventilators 15 36 is mounted for resiliently supporting horizontal plates
38. As best shown in FIG. 8, each bracket 35 is a ?at,
project above the top of the roof. Also, to the extent that
such a ventilator projects above the roof of a building,
it often interferes with the over-all architectural design
plate-like member secured in a cutout or recess in a
corner post, as by welding.
A U-shaped motor well de?ning member 40 has
that those working in the ventilator art have long sought 20 laterally disposed top end flanges 41 secured to the inner
edge portions of the plates 33.
to provide ventilators of as loW a silhouette or height as is
A rectangular channel iron frame 45 is supported by the
possible compatible with ef?cicnt operation.
plates 33 and it is my preference to interpose resilient
Another thing which those workingin this art have
of the building.
It is for those as well as other reasons
rubber-like pads 43 between the bottom of the frame and
sought to provide is a ventilator construction wherein the
vibrations produced by operation of the motor and im 25 the plates.
of minimum silhouette or height ‘which is capable of hous
A ‘pair of channel iron cross plates 47, 48 are secured
at their ends, as by welding, to the opposite sides of the
frame 45 for mounting brackets 5!) carrying bearings 51
ing one or more air impellers and a driving motor and
for journaling pulley shafts 53 carrying pulleys 55, 56.
pellers is reduced to a minimum.
It is an object of my invention to provide a ventilator
which also performs with ‘greater e?iciency than many 30 A pair of centrifugal air impellers 60, 61 are secured
on the shafts 53 in position beneath the respective plates
ventilators which have objectionably high silhouettes.
38. The bottom end of each impeller carries an inlet
More speci?cally, it is an object'of my invention to
de?ning ring ‘64 of angled cross section providing an
provide a ventilator having a louvered housing, having
annular ?ange 65 surrounding the outlet ends of the
longitudinally spaced air impellers suspended from a
resiliently mounted supporting panel and having a motor 35 respective ori?ce rings 67 whose bottom ends are secured
suspended from said panel in a recess between the im
to the base around the base inlet ori?ce 68.
to the bottom of the base in position surrounding the
respective ori?ces 63 I provide rings 69 of angled cross
Another object is to provide a ventilator construction
of this type in which the motor is constantly exposed to
circulating air.
Another object of my invention is to provide a roof
ventilator which is capable of simultaneously exhausting
foul air from two separate parts of a building or of intro
section each providing an annular ?ange 70 to be ?tted
40 in the outlet end of an air-passing conduit 71 leading
from the building being ventilated. An angle iron cross
member 74 extends across the top of the frame 45 and a
channel iron motor mounting bracket 75 is secured to
the cross member 74. Diagonal bracing members 77
ducing fresh air into a building ‘while exhausting foul air
45 are secured at one end to the bracket 75 and secured
from the building.
Other more subordinate objects and advantages will
at their other ends to the bottom surfaces of the opposite
appear hereinafter.
sides of the frame 45.
A motor mount 79 is secured to the bracket 75 and
While I shall point out in the appended claims the fea
has a strap 80 extending in embracing relationship about
tures which I believe to be new, I shall now, for the
purpose of enabling those skilled in the art to understand, 50 a conventional electric motor M, the motor being thus
construct, and use my invention, describe presently pre
suspended in a well 81 de?ned by the member 40 between
ferred embodiments thereof, for which purpose I shall
the impellers.
refer to the accompanying drawing wherein:
FIG. 1 is a side elevational view;
FIG. 2 is a top plan view;
3 is a sectional view taken on line 3—3 of FIG. 2;
4 is a view taken on line ‘4-4 of FIG. 3;
5 is a section taken on line 5-—5 of FIG. 4;
6 is a view taken on line 6—6 of FIG. 4;
The upwardly projecting motor shaft 83 carries two
superimposed pulleys 84, 85 from which continuous
55 belts 86, 87 extend about the respective pulleys 55, 56‘.
The hood, in conjunction with the plates 38 and mem
ber 40, de?nes the motor compartment 81 from which
an air outlet 90 is provided around the frame 45 in
' communication with the air outletZtl.
FIG. 7 is a medial longitudinal sectional view showing 60
In the embodiment of FIGS. 1-6 it will be observed
that both the air impellers are designed and operated
FIG. 8 is an enlarged fragmentary view partly in sec
to withdraw air from the building through the con
tion and partly in elevation, taken on line 8—3 of FIG. 4.
duits 71, which conduits may lead from different parts
Referring now‘to the drawing, 5 denotes a rectangular
of the building.
base having a depending ?ange 6 around its perimeter to 65 In operation, the air impellers withdraw air from the
engage over the conventional curb member, not shown,
building and discharge it through the outlets \19 between
which usually surrounds the ventilation opening in a
the louvers, and air passing outwardly over the topmost
building roof, not shown.
louver creates a reduced pressure at the outlet 90 to
The rectangular body 10, carried by the base, com
maintain circulation of air in the motor compartment.
prises hollow corner posts 15' of rectangular cross sec 70
Inasmuch as the motor is suspended between the air
tion, side and end walls 17 and louvers 18 whose ends
impellers, the over-all height of the device is reduced
a modi?ed form of my invention; and
are secured to the corner posts as by welding or in any
to a minimum, and the manner in which the frame from
carried by said shafts above said frame and belt extend
ing about said pulleys.
which the motor mounting bracket is suspended is vibra
tion-insulated by the resilient pads, causes the vibrations
resulting from the operation of the motor and impellers
2. In a power-operated roof ventilator, a hollow body
of rectangular horizontal section having louvers in its
to the building structure.
C21 side and end walls de?ning air passages therebetween, a
top closure member carried by said body, a base under
Air passing outwardly through outlet 20 is de?ected
lying and carried by the bottom of said body and having
by the depending ?ange 29, thus increasing the reduced
a pair of laterally spaced air-passing openings, a pair
pressure at the outlet 90. The ba?iles 18 are so shaped
of air impellers, means mounting said impellers in
tht e?ieient operation of the ventilator is not interfered
to be damped so that those vibrations are not transferred
with by extraneous air currents blowing about the ven 10 laterally spaced relationship in said body in register with
said respective openings, U-shaped wall means carried
tilator housing.
by said body between said impellers and de?ning an up
In the embodiment of FIG. 7 the parts are the same
wardly opening motor well between said impellers, said
as in FIGS. 1—-6 and are given like reference numerals,
Wall means separating the interior of said body into two
except that, instead of having both air impellers pulling
horizontally spaced air chambers communicating with
air from the building, a blower fan 95 is substituted for
said respective air passing openings, a motor mounted
the previously described impeller 61, so that fresh air
in said well, and pulley and belt means operatively con
may be drawn in between the louvers and may be forced
necting said motor to said respective impellers simul
into the building through one conduit While foul air is
taneously to rotate said impellers; said base having wall
being withdrawn from the building through another con
20 portions closing the bottom portion of said body except
duit by the air impeller 60.
for said air passing openings.
Here, also, the resilient pads 43 are eliminated and
relatively thicker pads 36a are used in lieu of the rela
tively thinner pads 36 of FIGS. 1-6. Also, a dished
member 97 is substituted for the corresponding plate
of FIGS. 1-6.
I claim:
3. In a power-operated roof ventilator, a hollow body
of rectangular horizontal section having louvers in its
side and end walls de?ning air passages therebetween,
length and width than the interior of said body, a pair
said well to separate the lower portion of the interior
a top closure member carried by said body, a base car
ried by and closing the bottom of said body and having
a pair of laterally spaced air~passing openings communi
1. In a roof ventilator, a rectangular base, a hollow
cating with the interior of said body, a pair of air impel
open-topped body of rectangular cross section mounted
lers rotatably supported in said body in register with said
on said base and having louvers in its side walls de
?ning air passageways therebetween, a hood of rectangu 30 respective openings, U-shaped wall means carried by
and disposed in said body and de?ning an upwardly open
lar plan section mounted on the top of said body, said
ing motor well between said impellers, a motor mounted
base having a pair of longitudinally spaced air-passing
in said Well, pulley and belt means operatively connect
openings and carrying an upwardly disposed ori?ce ring
ing said motor to said respective impellers to cause said
surrounding each of said openings, a rectangular frame,
impellers simultaneously to be rotated in relatively op
support means resiliently supporting said frame in
posite directions in response to operation of said motor,
the upper portion of said body, said frame extending
second wall means in said body and cooperating with
above the plane of the top of said body and being of less
of said body into an air inlet chamber exposed to one
of longitudinally spaced horizontally disposed plates car
ried by said support means in position underlying said 40 of said impellers and an air outlet chamber exposed to
the other of said impellers and means securing said
second wall means to said body in position overlying said
frame and overlying said respective openings, a pair of
vertically disposed laterally spaced impeller shafts ro
tatably carried by said frame coaxial with said respective
respective chambers.
openings and depending through said respective plates,
an air impeller secured on the bottom end of each of said 45
impeller shafts beneath said respective plates and hav
ing annular bottom portions depending in spaced sur
rounding relationship to said respective ori?ce rings, a
U-shaped wall member suspended from said plates be
tween said impellers and de?ning an upwardly opening
motor Well, said wall member having ?ange portions
secured to said plates, a motor having a vertically up~
wardly extending shaft, means carried by said frame
and supporting said motor in said well, and pulley means
References Cited in the tile of this patent
Shaver _____________ __ Dec. 27,
Gohl ________________ __ Jan. 15,
Marker ______________ __ June 14,
McKann _____________ __ July 19,
Solzman _____________ __ Jan. 15,
Breidert ____________ __ Apr. 15,
Knutson _____________ __ Jan. 13,
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