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Патент USA US2115367

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April 26, 1938.
M. I. LEvY'Er‘AL ‘
Filed May “14, 1937
' MAP/ON].
' I‘ I"
2 y
Patented Apr. .267, '1938 1
_ I
“Marion'LILevy, Cleveland, and Arthur Benne
~ 'kamper, Parma, Ohio, assignors to Viking Air
vConditioning Corporation, Cleveland, Ohio
‘ :Application May, 14,- 1937, Serial No. 142,603
11 Claims. (Cl. 2307-134)
evenly set at the correct angle. Furthermore,
This invention relates to blower wheels on cen
welding particularly, it being a manual op
trifugal‘ pumps‘ or ‘fans, and particularly to the the
eration, was not always uniform. Sometimes too
rotor section?‘ technically known asthe' impeller. _'much
heat applied ‘at one spot- would cause the
The principal object of the invention is to pro-_
,- I‘v’ide an economical ‘and expeditious’ method ofv ring to warp and again at other times, depositing
a trifle more of metal at one joint than at an
’ constructing centrifugal type blowers.
Another object is tocon'struet blower wheels other, ‘would ‘throw the‘ wheel considerably off
of a more durable structureand having a ‘more balance.
In the method of construction using horizontal
"even dynamic andfr‘unning'ibalance. ‘
A further object is to construct blower wheels,
‘ ‘utilizing a novel and simple "means for attaching -
the blades to the side rings‘ in a truer and more
end tabsprojecting through the rings, it is alcom- , 10,
paratlvely simple matter to attach all the blades
to one ring, but it' is more dilficult to place the
secondring over the assembled blades,‘ as each
blade has tobe‘in exactly the right position for‘
These manner;
and other objects
" '-' of
' our invention
" ' -'
.- the tabs-to engage all the slotssimultaneously. 15
15 more fully set‘ forth hereinafter, reference being ' ‘To get all the blades in the-proper position was
made to the accompanying drawing, in which like time'cOn'surning and fans of this type of con- ,
- parts are designated ‘by like-reference characters struction were therefore, expensive to manufac
and in which:
Figure Isis a pérsp,ect_ive-_view,of,the-_bl0wer _
A ‘slightly unbalanced wheel could operate rea- _
wheel ;
sonably well at comparatively low speeds, but in
. Figure II'is an, enlarged-view of asection'of a .
the more advanced types of blowers, vand those
side ring showingposition of sockets embossed
Figure III is a cross sectional- view of a side
.. ringtakenalong line III-III of vFigure IL.’ ‘I v
Figure IV is a sectional View of a side ring and
-which depend upon high speed for ef?ciency and
satisfactory operation, the blower wheel must be
in dynamic balance at all-times and must be able
to retain this balance without warping or being
subject to distortion.
blades showingstepsin assembling the “same;
our invention relates consists of a shaft IS, on
a blade just before assemblytaken along line
V—V of Figure IV;
1 I
The'centrifugal type of blower wheel to which
. Figure V is a sectional view of a side ‘ring and
which is mounted by'means of the radial braces
or spokes ill, the impeller section composed of
Figure VI is a sectional view‘ of a side ring and
the side rings II and the blades l2.
' The rings II, are stamped out of suitable ?at
of Figure IV;
metal; are in‘ reality ?at uniformly circular end
Figure VII‘is a sectional view of a side ring ' less hoops; and are embossed was to form chan 35
a blade'after assembly taken along line VI-VI
3;), after the tab is squeezed into the embossed socket,
‘ nels .o1' sockets M on their inside surfaces.
raised or‘ embossed portion of they ring II, is
' taken
is line
a view
of ablade
of theFigure
showing for
quadrilateral in form and has two slots
mation of end—sta'y and" tab on the- end of‘ a. somewhat
l5 and ‘IS in the parallel sides. The sockets M
curved blade, taken along the line VIII'-YIII of are annularly and evenly spaced around the ring
Figure IX is a sectional view of a side ring and
ll, are set at an angle, and so‘made that the
longest side, having the slot 15 is easily reached,
blade tab taken along the lines IX—IX of Figure _to facilitate assembly. The sockets M are also
II, similar to the view of Figure VI, excepting deep enough to permit the tabs ll to go through
that the bladetab is "shown as being welded in
the slots l5 andrl? easily and smoothly. The re- 45 stead of peened to the -_side ring.
quired embossment or lateral depth of the socket
' 1 .Heretofore,,, in the manufacture
of , blower v .
i4 is dependent upon the thickness of the metal ,
‘ wheels, it has been the practice in assembling the
1 150
at the tabs, H. The uniformly correct angle at
rotor section or_'impelle1.‘,_.t0 rivetihe blades to which the blades l2. are affixed to the rings I l, is
the side rings, or to have horizontal tabs on the '
easily controlled by the regular positioning of the
blades extend through slots in the rings andbent , ‘shoulders of the end-stays l8 ?rmly against the
over on the outside. Either of these methods of
- ,7 coasiructlqn, and.’ assembly. have a > tendency to
unbalance ‘the wheel.‘
rims of the sockets l5.v
‘ I
The vblades lZ-are also made of metal strips
curved longitudinally and which have arcuate
The weld or rivets could ‘ '
not always-be uniformly spaced andv as a result, ' end-stays l8 and tabs I‘! on their curved ends.
all of the blades were not always'parallel'or
2 v.
The. end-stays i8 serve to strengthen the blade,
preserve its curvature and acts as a guide for the
the shaft to the said blades.
correct positioning of the tab I‘! in the socket H.
2. A blower wheel, comprising in combination,
side rings having a plurality of annularly spaced
longitudinally embossed ?at sockets, a plurality
of blades having tabs fastened in the said sock
ets, and a shaft attached to the said blades.
The tab ll attached to the end-stay I8 is some
what pointed or triangular in shape and fits into
‘ thev slots [5 and I6 as shown and is securely fas
tened therein by peening as indicated in the Fig
ures VI and VII, or by welding, brazing or sol
said sockets, a shaft, and a'means for
. .
3. A blower wheel, comprising incombination,"
dering asindicated by the character 20; 'in ‘Fig
parallelside‘rin'gs having a pluralltyof- inwardly
ure IX.
embossed sockets thereon,‘ a plurality'of parallel
blades having end tabs securely engaging the
The weld, braze or solder should not ex
tend out beyond the outside surface of the side
ring, but should be con?ned within the embossed
depression, herein termed a cup and designated
by. the character 2|; otherwise the additional
projecting metal might, cause the blower wheel '
to lose its running balance when revolving at
sockets, the said blades being annularly spaced
between theside rings, a shaft projecting out.- ; '
wardly through the centers ofv the side rings
and ‘a means for-attaching the shaft to the said 16
" 4;". Ina-blower, an impeller, comprising incomé
comparatively high speeds. .
In the commercial assembly of a wheel, the: bination, parallel side rings; the said side rings
I two side rings II are placed in a jig and held _ having ‘a plurality of annularly‘ spaced embossed
parallel to each other; both ends of a blade, are‘
attached to the two'rings simultaneously; and.
the rings I I are squeezed or peened at the sockets
it; so that: the portion of a tab I1 is forced into
the hollow space or cup 2| in the ring ll caused
25 by the embossing of the socket H. The opera
tion of thus joining the blades to the rings is
carried on progressively'until all the blades are
in position and the wheel is complete.-
wheel is then'mounted- on a suitable, shaft, I3
30 ‘by means of the radial braces or spokes l9..
-Because.of<the closeness of the-blades. I2 to I
i' ;
. 5, Die; blower; an‘ impeller, comprising‘ iIl'COIIl-r
bination parallel side rings having a pl'urality'ofv
annularlyspacedsockets _thereon,the said sock-v
as being lateral to and on the ‘inside’ of. they said]
rings, and a plurality of blades between the ‘rings. .
6. In a blower,‘ an impeller, comprisingin ‘comav
tbinationta plurality "of longitudinally curved
and parallel side ‘rings having means forvsecurely ,
engaging the said tabs."
the-rings l I and then in’an arcurate direction to
engage the sockets. ‘By ‘making ‘the tabs-ll
pointed v‘and the entrance slot [5 longer the.‘
40 speed at which the parts are assembled is greatly
However, when the blower wheels are auto¢
matically assembled, .thetabs I'I_ would. not nec
essarily have to be pointed nor would the sockets
l4, havesto be embossed in. the particular angle
45 -or be of the particular shape illustrated. .The
in combination, parallel‘ side" rings having afplu
bossel ?at sockets thereon, and a plurality of
longitudinallyfcurved blades, che- said ‘blades
having arcurate end-stays and'tabs ?tting the
said sockets and securely fastened therein...- ~ , 407*
8. In a blower,-an impeller, comprising meom-j . .' 7
bination, ‘side rings having} a plurality ‘of inwardly disposed'sockets, ajpluralityl' of blades,
and means on the said blades for‘uniforfnly eng ‘
gaging the
said ‘sockets.
/ "
9. In a blower, an impeller blade, consisting’ of l >
a strip of metal: having curved ends, arcurate ..
jecting from the said'end-stays'
” ’
10. In a blower, an impeller blade; consisting
of, a ‘longitudinally curved strip, arcuate end~
stays ‘extending, laterally across the ‘ends of the
strip, and tabs projecting diametrically fromv the '
‘ 11. end-stays.
In a blower, an im'peller'rin‘g.
i “consisting
; '
a flat hoop having a‘ pluralityroflannularly. and"
evenly spaced sockets on one ‘side thereof, the
said sockets each having a flat channel contigu-_
1. A’ blower wheel, comprising in combination, ions" to" the"surface of’ the hoop'and extending
side rings, each of the said side rings, having a angularly to the circum'ierencethereof.
plurality of lateral sockets on their inside sur~ '
.faces, a plurality of blades between the rings,
each of the blades having tabs engaging the
ralitybf vannularlyjspaced longitudinally "em-'3- . "
end-stays across the ‘curved ends, and tabs pro
_ l
instead‘ of as‘shown; or-v have any other shape
v_'Z. In a blower wheel, an impeller‘yc'omp'risi‘ngg '
tabs IT, for instance could be square or round
While we have describedv theinvention in its
.50 preferred form, and while we have‘ used certain
terms and language, it is understood that the
embodiment of the invention as described is
merelyillustrative and is. not to be construed in
a limiting sense, as various changes may be made
without departing from ‘the spirit of the inven
tion or‘ the scope of the appended claims.
bladeshaving'arcuate end-stays and pointed'tabs,
each other, the last-blade could not be conven
. tabs thereon ?rst in an axial directionv between
and having means, for ‘engaging the said‘s'ockets?,
iently installed, unless the tabs 01 thereon were
.easily‘accessible to the slots l5." Therefore inv
35 placing the last blade‘ it is necessary to slide the
sockets and a plurality of blades having end tabs 20,
engaging.v the, sockets and ‘securely’ v‘fastened
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