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Dec. 31, 1946.
D, G, éMELLlE
2,413,587 '
SUCTION CLEANER
Filed April 26, 1943
v
4 Sheéts-Sheet 1
'1
NH]
INVEN TOR.
Donald 6‘. é'rrzellz'e
,MMLJMM
Dec. 31, 1946.
D. G. SMELLIE
' 2,413,587
SUCTI-ON CLEANER
Filed-April 26, 1943
'4 Sheets-Sheet 2
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mmvroa
?onald 6. Smellie
Dec. 31,1946.’
'
D, G, SMELUE
-
2,413,587
SUCTION CLEANER .
Filed April 26, 1943’
I
I
4 Sheets-Sheet 3
“30mm 6. meme
Dec. 31, 1946.
o. s. SMEL'LIEI
2,4 1 3,758 7
SUCTION CLEANER
Filed April 26, 1943
4 SheetS-Shéet 4
uvmvroa
0011010’ 6. Mellie
2y
Patented Dec. 3i?’ 1946
has?
stares PAT
2,413,587
v
tic’
suorron CLEANER
Donald G. Smellie, Canton, Ohio, assignor to The
‘Hoover (Jompany, North Canton, ()hio, a cor»
poration of Ohio
Application [ipril 2d, 1943, Serial No. 484,514
l5 (lies. (Cl. 15-16)
The present invention relates to suction clean
ers in general and more particularly to a new and
novel cleaner‘ construction in which there is no
cleaner bag or ?lter to be removed and cleaned
by the operator. More particularly, the inven—
tion comprises an improved suction cleaner con
struction in which a plurality of dirt-separating
units in series remove all the foreign material
from the dirt-carrying air passing through the
cleaner, the ?nal dirt-separatorbeing provided
2
.
whichiis positioned the suction-creating means of
the cleaner, in combination with ?lter-cleaning
means which are automatically operative to re
move'the collected foreign material from the ?
nal ?lter and to transmit it directly to the initial
separator under predetermined conditions. A
further object of the invention is to provide a
suction cleaner including suction-creating means
and dirt-separating means, in combination with
?lter-cleaning means which are, operated by the
driving means for the suction-creating‘ means
and which are placed in operation automatically
under predetermined cleaner conditions. Still
with cleaning means which remove the collect
ed material therefrom and return it to an initial
separator which is provided with a removable
dirt-receptacle. It is an added feature of the in»
vention that the cleaning of the ?nal ?lter is ac 15 another object of the invention is to provide a
suction cleaner which incorporates an initial dirt
complished automatically,
»
separator and a ?nal dirt separator in combina
Certain constructional features disclosed here!
tion with means automatically to clean the ?nal
in are also disclosed and claimed in the co-?led
dirt-separator under predetermined operating
and co-pending application of Louis K. Acheson,
Serial No. 484,510, assigned to the assignee of the
present application. These features include the
general cleaner arrangement and the mounting
and driving means of the ?lter-cleaning nozzle.
The present-invention is viewed \as an improve
ment of the broader invention of the Acheson ap
plication.
.
_
It is an object of the present invention to pro
vide a new and improved suctionv cleaner. It is
another object of the invention to provide a suc
conditions. A still further object of the inven
tion is to provide a suction cleaner incorporating
an initial dirt separator and a ?nal dirt separator
in combination with meansv to remove the col“
lected foreign material from the ?nal dirt sepa
rator and to return it to the initial separator up
25 on determined variations in nozzle suction being
effected. Still another object of the invention is
to provide a suction cleaner incorporating ?lter
cleaning means which are automatically placed
tion cleaner having new and improved dirt-sepa 30 into. operation. These and other more speci?c
objects will appear upon reading the following .
rating means. A further object of ‘the invention
speci?cation
and claims and upon considering in
is to provide a suction cleaner which incorpo
connection therewith the attached drawings to
rates a new and novel arrangement of dirt-sepa-r
which they relate.
'
rating means in combination with automatic
- ' Referring now to
v
_7
the
drawings
in which pre
means to remove the collected foreign material 35
ferred embodimenthuof the present invention are
from certain of said separating means and to
transport them to an operator-removable con
Figure 1 is a vertical section through a cleaner
tainer. A still further object of the‘invention is
construction
in accordance with the ?rst embodi
to provide a suction cleaner in which the dirt- _ ‘
. ment of the invention}
laden air stream passes through an initial sepa»
Figure 2 is a section through the power-trans
rater, through suction-creating ‘means, and
mitting
and clutch means being taken upon the
through a final separator, automatic means be
line 2—2 of Figure 1;
ing provided to remove the collected foreign ma
Figure 3 is a vertical partial section through
terial from the ?nal separator and to return it to
the
power-transmitting and clutch means, ‘being
the initial separator when determined by the ma
_ taken upon the line 3—3 of Figure 2 and Fig
chine itself to be necessary. Still another object
are 1;
of the invention is to provide a, suction cleaner
"Figure ‘l is a showing partly in section and up
incorporating an initial dirt separator and a ?- ‘
disclosed:
nal dirt ?lter in combination with automatic
_
'
Y
v on the line {3-43 of Figure 2;
Figure 5 is a partial section through the clean
means to remove the collected foreign material 50
er
looking in the direction of the arrows upon the
from the dirt ?lter and to convey it directly to the
l'ine 5-5 of Figure l and shows the air ?ow=con
initial separator from which it can be removed ‘by
trolling valve in its normal operating position;
the operator. A still further object of the inven- .
Figure 6 is a transverse partial section look
tion is to provide a suction cleaner having an ini
tial dirt separator and a ?nal dirt ?lter between 55 ing in the direction of the arrows upon the line
tin-6, of Figure l and shows the air ?ow-control
‘
2,413,687
ling valve in its normaloperating position and its
' relationship to the conduit leading to the ?lter
cleaning nozzle;
Figure '7 is a partial side view looking in the di
rection of the arrows upon the line 1-1 in Fig
ure 5 with certain parts broken away and shown
‘in section, and illustrates the valve-controlling’
mechanism and the inlet and valve relationship; .
4
permeable fabric or functionally similar mate
rial. Such a machine can accomplish removal
of all the dirt and is no more objectionable than
is the usual bag type cleaner. Mr. Bible realized
that in time the escaped foreign material from
his initial separator would build up on his ?nal '
?lter and increase the resistance to the flow of air
therethrough. This would result in the back
pressure of his cleaner increasing which in turn
Figure 8 is a vertical interior view of the clean
would reduce the ?ow of air through the ma
er and shows the pressure-responsive bellows 10 chine and so the cleaning effectiveness of the
which actuates the valve-positioning mechanism
and the clutch-solenoid-controlling electrical
entire cleaner. To eliminate this objectionable
switch, the bellows being shown in full lines in the
- a manuallyoperable cleaning nozzle which, when
manually connected to the dusting tool hose
normal.inoperative position and the dotted line
illustrating the angle assumed by the bellows top
plate when the back pressure in the ?nal filter
has increased to a point indicating the necessity
feature the Bible patent construction provided
which usually carried the usual cleaning nozzle
at its end, enabled the operator to clean the ?lter
by a few simple operations.
The dirt removed
for the ?lter-cleaning operation to begin; .
> from the ?nal ?lter in the/Bible cleaner was re
Figure 9 is a diagrammatic showing of the elec- 4
turned to the initial separator where it could be
20
trical connections of the cleaner;
.
removed from the air stream. That such re
Figure 10 is a view similar to Figure 5 and illus
moval took place upon the second passage of the
trates a second preferred-embodiment of the in
dirt through the separator was due to an ag
vention in which the suction or inlet side of the
glomerat‘ing effect which had taken place inthe
cleaner is connected to the control bellows rather
collection of the dirt on the final ?lter.
than the high pressure side as in the ?rst em 25
In the suction cleaner construction in accord- -
ance with the present invention, the basic prin—
_
Figure 11 is a view similar to Figure 8 and illus
ciple of the Bible invention has been improved
trates the» connection of the suction or inlet side
in that fully automatic means are provided to
of‘ the cleaner to the control bellows which is
place the ?lter-cleaning mechanism into opera
' positioned in the inoperative position in which 30 tion when required by the collection of foreign
the filter-cleaning nozzle is inoperative.
material on the ?nal ?lter. An'undue collection
The modern suction cleaner has materially
of foreign material upon that ?lter results in an
lessened the burden of home cleaning through
increased back pressure in the machine and, in
its ability to remove from rugs, carpets, articles
accordance with the ?rst embodiment of the in
of furniture, drapes, etc., dirt and foreign mate 35 vention, this increased back pressure automati
rial which inevitably collects thereon. The
cally results in the connection of the ?lter-clean
cleaning operation itself is today not very objec
ing nozzle to the intake of the cleaner and the
tionable to the housewife, but there remains one
mechanical connection of that nozzle to the driv
task which is objectionable and which must be
ing motor resulting in its actuation. The ?lter
undertaken in order that the cleaner operate 40 - cleaning operation continues until the back pres
e?ectively. That task comprises the cleaning of
sure has decreased to a predetermined point at
the dirt-filtering or dirt-separating means of
which the operation is automatically discontin
the cleaner.
ued. In the second'p-rcferred embodiment of
The usual cleaner embodies a dust bag through
the invention the control of the operation is by
45
which the dirt-laden air is exhausted and which
the pressure on the suction side of the cleaner
performs the function of removing the dirt from
rather than on the exhaust side.
the air by permitting the latter to pass through
Returning now to the drawings, and to Figures
its interstices. Suction cleaners have in the past
1 to 9 inclusive in particular, the ?rst preferred
"been built incorporating mechanical separating
embodiment of the invention is illustrated and
means such as whirl chambers and other types 50 is seen in Figure 1 in particular to comprise a
bodiment; and
of centrifugal separators. These have embodied
removable dirt ‘pans, drawers‘, containers, etc.-,
which are easily cleaned requiring only a dump
ing operation. The objection to these mechani
cal separators, however, is that they fail to re
move a small fraction or percentage of the for
eign material which passes through the cleaner.
While in terms of percentage this escaped for
eign matter is not important it is important in
terms of user objection in that it comprises a
,very ?ne material which ?oats in the air and
which is noticeable and objectionable to the user
as a dust smell.
As a result of this objection,
suction cleaners embodying mechanical dirt sepa
rator means alone have not in the past been very
successful.
‘
,
In order to overcome this inherent di?iculty in
the mechanical separator type cleaner the Bible
Patent 2,247,472 discloses a combination of me
chanical dirt separator and ?nal ?lter. In the
Bible construction substantially all of the dirt is
removed by'the initial separator, the cleaned air
being drawn therefrom by the suction-creating
main preferably-cylindrical housing i which seats
upon a. supporting base 2, being removable there
> from in any suitable manner. The top of housing
55 I is closed by the motor hood 3 which is provided
with an inwardly extending and supporting wall
4 adapted to support a motor later to be described.
‘At its lower end the main housing I is provided
with interiorly extending rim 5 which seats and
seals upon the upper peripheral edges of a dirt
60
container or pan 1 which isipositioned within the
base 2. A vertical cylindrical casing 8 rises from
the ?anged ring 5, to which it is permanently
connected, and is divided by a centrally apertured
65 transverse wall 9 into a whirl'chamber II and
a fan chamber l2. A depending inlet l3 from
fan chamber l2 extends down past the mid-por
tion of whirl chamber H and vertically spaced
spiders l4 carry a'depending supporting rod is
-70 at the lower end of which is supported, by means
of a nut l1, a circular plate It! which is positioned
just above the dirt pan 1 and which has a diame
ter somewhat smaller than the diameter of cas
ing 8. A strainer I9 is provided upon the sup
means of the cleaner which in turn exhausts it
porting rod l6 immediately below the lower spider
' through a. ?nal ?lter preferably formed of an air 75
2,418,587
H to prevent the entrance'of foreign material
of appreciable size into the fan chamber.
Whirl chamber H is interiorly connected
through a valve chamber 2| to the inlet port 22
which vextends inwardly through the outer én
closing main casing l_ and- at its outer end is
adapted to seat a suitable dusting tool hose 6 of
the usual and well known type which carries a
cleaning nozzle I0 at its outer end. A vertically
6
43 which is rotatably supported concentrically
of its downwardly-facing inlet 44 by means of
a bearing 46 which is carried by the upwardly
opening seatof conduit 41. The latter extends
‘ across the top of the‘ fan chamber I2 and then
down the side of the casing 8 to end within the
valve inlet chamber 2| and adjacent the valve
23. Suitable seals 48 and 49 are provided to pre
vent air leakage around the vertical sleeve 5|
extending valve 23 is positioned within the valve 10 which encloses and partially supports, as .at the
chamber 2| being pivoted for movement between
bearing 52, the motor shaft 32. The lower seal
a port-closing position, as illustrated in dotted '. 48 also prevents. leakage of air between the fan
lines in Figure 6, and a second closing‘position .
chamber l2 and the conduit 41.
as illustrated in the full lines in the same ?gure,
Rotary movement is imparted to the ?lter
through being fixed upon a shaft 24.
15 cleaning nozzle 42 by means of the speed-reduc
A stationary de?ector 25 positioned centrally
ing and clutch mechanism positioned within the
within the fan chamber |2 divides the latter into
housing 54 immediately below the motor 29. The
a?rst stage and a second stage which are con
motor shaft 32 rotates at a speed much too high
nected by the deflector port 26. A rotary cen
for direct connection to the ?lter-cleaning nozzle
trifugal fan 21 is positioned within each stage 20 42 and accordingly it is necessary that speed- .
of the fan chamber, the second stage being pro
reducing means be provided. Additionally, it is
vided with a plurality of exhaust ports 23 to ex
desired, according to the present invention, that
haust the air into the space immediately around
the ?lter-cleaning nozzle operate only when nec
the upper end of the cylindrical casing 8.
essary and this requires that means be provided
Within the motor hood 3 is positioned a driv 25 to clutch and de-clutch the nozzle to‘ and from
ing motorv 23 the enclosing cylindrical wall of
the motor. The speed-reducing and clutch
which is provided with a plurality of apertures
means comprise a plurality of gears and shafts.
3| both above and below the transverse wall 4
Motor shaft 32 itself carries a worm 56 within‘
by which it is centrally supported. It is the
the sleeve 5| and immediately below motor 29.
shaft 32 of this motor which extends vertically 30 A transverse jack shaft 51, rotatable in bearings
down and into the fan chamber |2 to carry the
58 positioned in brackets 59, carries a gear 6|
fans 21.
'
'
"
z
which extends through a slot 62 in the sleeve 5|
The space immediately around the upperend
to mesh with the worm 56.
oi‘ the cylindrical casing 8 and thereabove com
A second and vertical jack shaft extends trans
prises a ?lter chamber 33, the cylindrical side 35 versely of jack shaft 51 and is indicated by the
wall of which is formed by the air permeable filter
reference character 64. A gear 66 at the upper
34 which is spacedyinwardly from the enclosing
end of shaft 64 cooperates with the worm'61 car
main casing l. The lower end of the ?lter cham
ried by jack shaft 51. A gear 63 at the lower end
ber 33 is closed by the ?anged collar 36 which
of vertical jack shaft 64 is inv turn adapted to co-}
seals to the exterior of the cylindrical casing
operate with a large diameter gear 69 which en- ~
8 at its inner periphery while the upper end of
circles [the sleeve 5| about the motor shaft, being
the chamber 33 is formed by the closure plate
rotatably seated thereon by bearing 1|. Gear
31. The latter is deformed to seal centrally upon >
69 is ?xedly secured by means of a plurality of
the lower end of the motor casing 23, its outer
rivets 13 to the conduit seat 43 which carries the
edge being supported in spaced relationship to 45 nozzle 42 and the entire construction is forced
casing I by a plurality of spiders 38 which may
downwardly upon the bearing 46 by. the coil
be integrally formed. The upper edge of ?lter ‘ spring» 14 which encircles the sleeve 5| and exerts
34 is secured to a circular shoulder formed on
a downward force between a shoulder 16 on the
plate 31. The ?lter 34 of ?lter chamber 33 is
sleeve 5| and the bearing 1|. The ratio of the
seen to be spaced within the enclosing casing 60 gears connecting the shaft 32 to the nozzle 42 is
I and the space between the ?lter chamber and
such that a' material reduction in speed is- ob
easing | is indicated by the reference character
.tained at the nozzle 42.
39 and is called the discharge chamber. Air The clutching and de-clutching of the ?lter
which has passed through the ?lter 34, having
cleaning nozzle 42 from the motor shaft 32 is
previously been exhausted by the fan unit, can 55 accomplished by the following structure. The
escape from, the discharge chamber 39 only at
vertical jack shaft’ 64 is rotatably mounted in
the upper end thereof and around the plate 31.
upper and lower bearings 11 which are carried
Above the plate 31 the apertures 3| in the motor
by the parallel horizontal arms of a U-shaped
casing 23 provide means by which the air can
bracket 18 which is slidably supported on the bot
pass through that casing and by-pass the closure
tom face of chamber 54. The lower arm of the
plate 4. Exit from the motor hood 3 is by means
bracket is guided in its sliding movement by a
of the exhaust port 4| which, similarly to the
pin 19 carried by the bottom wall which cooper- ,
intake port 22, is adapted to receive and seat the
ates with a slot 8| in that arm while the upper
dusting tool'hose 6. The air in passing through
arm is guided by a downwardly extending U
the motor casing 29 performs the important 65 shaped guide member 82 which it contacts. A leaf
function of cooling that element.
spring 33 exerts a downward force upon the upper
The means which clean the ?nal ?lter 34 com
prise the nozzle 42 which is formed with a rela
bracket arm at all times to hold it in any set
42 can be a slot having a width in accordance
of movement being parallel to the horizontal jack .
shaft 51 so that the gear '66 remains in'contact
with the worm 61 in all adjusted positions of
position and to prevent‘ accidental displacement.
tively narrow mouth which extends the full height
The jack shaft 64 is movable with its carrying
of the ?lter 34. The intake opening of nozzle 70 bracket 18 between two positions, the direction
with well known cleaner design practice. Nozzle
42 is rotatably mounted for movement in a cir
cular orbit around the inner periphery of the
shaft 64. In the position illustrated in Figures‘ 2
cylindrical ?lter 34 by means‘‘ of a conduit seat 75 and _3, the Jack ‘shaft 64 has been moved.-':out~
x"
'
' 2,419,537
the filter chamber and'the bellows which provides
" wardly until the gear 86 is out of contact with
the pressure of the former in the latter comprises
an'elongated tube or conduit I04 which, from its
‘the large gear 89 and‘ consequently the filter
cleaning nozzle is stationary. Movement of the
connection'with the interior of the bellows 98,.
' U-shaped bracket 18 to'the right. as ‘viewed in
‘hi-.58 ?gures, effects the movement of the con- 3
\ as ‘illustrated in Figure 3, passes .up the side of
-- the cylindrical casing 8-a'nd into the filter cham
stantly rotating shaft 64 and the gear 88 until the
latter meshes with the large gear 89, at which
time the latter is rotated.
her 33 through the bottom wall 38 thereof, as
shown in Figure 1.
Conduit I04 is at all times
;
open to the ?lter chamber 33 and it is clear that
To control the‘clutchin'g and de-clutching of I
the air pressure which is present in that chamber
the ?lter-cleaning nozzle from the driving motor 10 will ‘also be‘ present within bellows 98.
means are provided which are controlled by the
To translate the movement of bellows 96 into
back pressure existingwithin the ?lter chamber
the actuation of the nozzlaclutching' means and
_. is according to this ?rst embodiment of the in‘
vention. The actual movement of the gear-car
rying bracket ‘I8 into and out of engaging position
the valve-operating means the bellows 98 carries‘
_
' is accomplished by means of an electrical solenoid
‘8 88,-the movable plunger 81 of which engages the
' slotted end of an L-shaped. lever arm 88 which
is pivotally mounted‘at 89 upon abracket'9I. A
torsion spring 92 at the pivotal axis of the arm
88 at all times exerts a pressure on that arm to
hold it in the lower plunger position. The op
‘ 'posite end of the lever arm 88 is rounded and
engages a slot seat formed therefor in the ex
tended end of a shaft 93 which is ?xedly con
nected to the bracket 18. The de-clutched po
sition of the bracket 18 andof the-shaft 93 is
that shown in full lines in Figure 2', the torsion
an upwardly opening U-shaped bracket I01 to
which pivotally connects the lower end. of a bell
‘ crank lever I08 which is itself pivotally mounted
centrally upon a pin I09 carried by a platform
III attached to the outer surface of casing 8 in
the manner of the shelf 99 but above the bellows
98. To the upper end of lever I00 is attached an
elongated coil spring II2 which is connected at
its opposite end to a snap lever I I3 which is piv
oted on the top-surface .of platform III by a
vertical pivot pin H4. The pin H4 is so posi
tioned relative to the travel ofv bell crank lever
I08 that spring H2 moves over center with re
spect thereto in moving from' the collapsed bel-,‘
lows position to the expanded bellows position.
spring 92 exerting a force tending‘ to hold the
The opposite end of the pivoted lever II3 con
parts in this relationship. With the solenoid 30 nects to_ the offset lower end of the valve shaft
energized, however, the plunger 81 thereof is
24 which also extends through the pivoted oper-.
drawn upwardly; the 'arm 88 is pivoted counter
ating lever II8 of a snap‘ action switch I" also
clockwise as viewed in Figure 2, and-the shaft 93
carried by the platform .I I I. Valve 23 is illus
is forced to theright and the gear 88 into mesh
35 trated in Figure 5 in its open'por't position with
with the large gear 69.
'
I
'
'
It is necessary that the ?lter-cleaning nozzle
"42 be actuated and supplied with a moving air
stream only when the physical condition of the
the bellows collapsed. With the bellows expand
ed and the bell crank lever I08 pivotedcounter
I > clockwise, ‘as viewed in Figure 8, it is clear that
. the ‘valve 23 would be moved into port-closing
position. In this position it opens‘to the interior,
40
In accordance with the‘ present ‘invention means
of the whirl chamber I I the lower end of the con
are provided whichv determine the existence of
' duit 41- which connects to‘ the filter-cleaning
?lter 34 makes the cleaning action‘ necessary.
this condition, and upon ?nding it to‘ be present;
cause the actuation of the nozzle and-the proper
positioning of the air ?ow~controlling valve 23.
_ This means comprises a pressure-responsivebel
. lows which is indicated ‘in the drawings bytthe
reference character 98 and which is seen to com
prise‘a flexible accordion-pleated air tight casing,
of a material such as rubber, its top and bottom
walls including the rigid plates 91 and 98, respec
tively. The lower plate 98 is ?xedly carried by
‘an outwardly extending shelf 99 ?xedly attached
to the lower end of the cylindrical wall 8, that is,
nozzle 42. Because of the movement of the
spring II2 over-center with respect‘to lever H3
in the pivotal movement of the bell crank lever
I08 it is clear that the operation of valve 23 and
‘switch I I1 will be characterized by a snap action.
The electrical switch I'I'I controls the clutch
actuatingsolenoid 88 through the conductors I19
50 which connect across the incoming power leads
IIO to the driving motor.29, the flow of current ,
therethrough being controlled by the motor-con
trolling switch I2I.
;
I,
z
The operation of the cleaner constructed in
upper bellows wall 91 is pivotally mounted upon 55 accordance with the ?rst embodiment of the
invention aforedescribed is as follows: Upon the
a bracket IOI which may be formed integrally.
operator closing the motor-controlling switch I2I
_ with the shelf 99 or may be merely ?xedly at
the electric motor 29 rotates its shaft 32 and
tached .thereto.-' .The connection between the
suction is created within the whirl chamber II
plate 91 and each'bracket IOI is by means of a
by the high speed rotation of the fans 21. A
pivot pin I02 and around each, pin is a torsion
spring I03 which at all times exerts a force to ' dusting tool hose. which was previously attached
to the inlet port 22_ and which preferably has a
urge the plate 91 downwardly to collapse the
bellows. Being pivotally mounted the top of the . cleaning nozzle I0 at the outer end thereof, con
veys the vdirt-laden air into the port 22, through
bellows, represented by the plate 91, is movable
‘ between a collapsed position,» illustrated in full 65 the valve chamber H, the valve 23 being in the
open port position as illustrated in Figures 5
lines inFigure 8, and an expanded position which
and
6, and the air enters the initial dirt~ separator
is illustrated diagrammatically by the dotted line
' adjacent the whirl chamber I I. Each end of the
in the same figure,v one or more suitable stops I08
‘ or whirl chamber II tangentially. } The foreign
material or dirt is thrown outwardly and passes
downwardly into the dirt pan ‘I positioned below
70
3 movement. Expansion ‘of the bellows takes place
the whirl chamber II while the cleaned air is
when the pressure therein is sufficient to over
drawn upwardly through the‘ inlet I3 into the I
being formed on bracket IM to limit theibellows
come-the resisting force of the torsion springs
?rst stage of the fan unit. The air is exhausted
from the second stage of the fan unit into the
a predetermined point. The connection between 76 ?nal dirt separator or ?lter chamber 33 from
I93 and such pressure is present when the pres
sure within the ?lter chamber 33 has exceeded
2,41 8953?
lb
.
which it passes outwardly through the air-per
meable but dirt~impermeable ?lter element 34. ' nozzle-connected‘ gear 69. The little gear is at
all times driven directly from the motor shaft
Upon leaving the ?lter chamber 33 the air en
Y 32 as previously described, and the result is that
ters the discharge chambertt from which it is
the large gear 69 now begins its rotation and
exhausted at- the top of the casing 6 through they
with it rotates the nozzle-carrying conduit seat
motor 29, therebeing inlet and‘ discharge ports
‘is which is ?xedly connected thereto. The nozzle
3! provided which permit its passage. through the
42 now rotates within the ?lter chamber 33
motor casing.‘ The'?ltered air passes into the . around
the motor shaft and in contact with the
atmosphere through the exhaust port it in the
?lter element 3d around its entire inner sur
motor hood 3. Incidentally, should the user de
sire to use pressure rather than suction in the .
10 face.
cleaning operation, the dusting tool hose would
have been connected to this exhaust‘ port it
rather than to the inlet port 22.
The operator continues his cleaning opera 15.'
tion and dirt-laden air passes through the ma
chine as described, practically all of the foreign
material being removed from the air within the
As the nozzle 42 moves over the dirt
covered inner surface‘ of the ?lter element 36 the
foreign material thereon is drawn into the mouth
of the nozzle 62 and is conveyed directly through
the conduits ‘i3 and d? to the whirl chamber
where it is removed, an agglomerating e?ect hav
ing taken place by the collection of the foreign
material upon the'?lter element 3t‘ so that the
initial separator but a very small fraction thereof
same foreign materialwhich previously escaped -
lects upon the ?lter element 36. After a consid
‘does not pass through the suction-creating fan
the whirl chamber is now removed therein.
escaping therefrom and being exhausted by the 20 from
The fact that this agglomerated foreign material
fan unit into the ?lter chamber 3? where it col
erable period of time the accumulated foreign
material upon the ?lter will result in an increase
in the back pressure, that is, in an increasein
the resistance to the ?ow of air through the filter
element. This increase in back pressure is, as
unit on its way to the whirl chamber prevents
the disintegration of the agglomerated material.
The cleaning operation of the ?nal ?lter 3t
continues until such time as the back pressure
within the ?lter chamber 33 has decreased to a
desirable degree. As the pressure within the ?lter
chamber 33 and within the bellows at are the
same any decrease in pressure in the chamber‘ is
previously stated, undesirable in that it decreases
the ?ow oi‘ air into the machine and accordingly
the cleaning e?’ectiveness. If permitted to con
tinue inde?nitely, this increase in back pres 30 immediately e?ective within the bellows and at
a certain point the pressure tending to expand
sure will in time render the machine completely
the bellowsor to hold it expanded is overcome
inoperative. In order to prevent such an event
by the collapsing force exerted by the torsion
it is desirable that the collected foreign material
springs its at the bellows’ pivotal axes. The
upon the?lter 36 be removed before the back
collapsing movement may be gradual or it may
pressure increases unduly.
_
be
in steps, but there arrives a certain point at
As the back pressure in the ?nal dirt separator
which the collapse ofthe bellows has been suffi
33 increases the bellows 9b is expanded by the
"cient to cause the spring M2 to move over-center
same pressure through being interiorly connected
again with respect to the pivotal axis tilt oi’ the
to chamber 33 by the conduit iil?l. As the bel
lever H3. When such time arrives, lever i it is
lows 36 expands its upper plate 97 moves up
again snapped to its original position, valve ‘23
' wardly being pivoted at its ends at l M. At a cer
is again moved to open position, thereby closing
tain point in Ithis upward movement, ‘that is,
the conduit er leading to the ?lter nozzle from
,when the bell crank lever W8 has been pivoted
the whirl chamber, and the inlet port 22 is again
su?iciently‘to move the spring H2 over-center
opened. The machine is then again in the normal
with respect to the pivotal axis lid of the lever
M3, the latter moves with a snap action to its
otherposition and results in the movement of
the valve 23 to its closing position with respect to
- operating relationship and the user can continue
with his cleaning operation.
.
In due time it will be desirable to remove the
the port 22. Simultaneously the electrical switch ' foreign material which has then collectedv within.
H‘! which controls the electrical solenoid 8t is 50 the dirt pan "i. This can be done either by remov
ing the pan ‘l laterally from the side of the
base 2 or by removing the upper part of. the
Upon the valve 23 being moved to the port
cleaner from the base and removing the pan
closing position, air can no longer enter the
therefrom as taught originally in the Bible Patent
cleaner through the dusting tool hose and the
2,247,472, depending upon the cleaner design.
entire suction of the device is made available to
Referring now to Figures 10 and 11 the second
the ?lter-cleaning nofzzle 52 through the conduit
‘ preferred embodiment of the invention isillus
1i"! which opens into the ‘valve chamber it at
closed.
'
'
the rear of the valve 23 in a position in which it ‘
is normally sealed from the whirl chamber. Air
is now drawn into the ?lter-cleaning nozzle 532,
passing inwardly from the discharge chamber
39 in the reverse of its normal direction of travel
therethrough and passes through the ?lter ele
ment 35. From the nozzle 42 the air is drawn
through the conduits t3 and a‘? into the Whirl
chamber.
'
The electrical energization of the solenoid 86
upon the closing of switch H1 resulted in the
upward movement of the plunger 87 which in‘
turn caused the pivotal movement of the L
shaped lever 83 which in turn forced inwardly
the shaft 93 connected to the bracket it. The
latter in its movement from the left to the
right, as viewed in Figure 3, caused the small
bracket-carried gear 68 to mesh with the large
trated in those details in which it di?ers from the
first described embodiment. The major ‘differ
ences lie in the fact that the bellows as is here
connected by means of a conduit lit to the inlet
port 22, whereas in the ?rst embodiment the bel- I
lows was connected to the interior of the filter ,
chamber. A second ditierence lies in the fact
that the torsion springs Hi3 acting upon the bell
lows thin the first embodiment exerted a col
lapsing force thereon, whereas ~ in this second
embodiment the coil springs M3 are so arranged
as to exert an expanding force. In other details
of construction this embodiment is like the pre
ceding one, with one exception. That exception
comprises the tab 23a on the valve 23 which pre
vents the valve vfrom completely sealing the port
22 when in the closing position.
This second embodiment of the invention oper
'
2,413,587
ates as follows. In normal cleaner operation with
the dusting tool nozzle H18 in contact with the _
' surface undergoing cleaning the pressure within
the inlet port 22 and so the pressure in the'bellows
96, is sumciently reduced to hold the bellows in a
' to said ?nal separator.
collapsed condition against the expanding force
of the springs H13. Should the dusting tool noz- '
zle be lifted for any reason the pressure within the
inlet port 22 immediately increases and the suc
tion in the bellows 96 is no longer su?icient to "
hold the bellows collapsed against the expanding
force of springs I03.
12.
conducting means, pressure-responsive means to
actuate said valve means, and air-conducting
means to connect said pressure-responsive means
Thereupon the bellows
‘ expand closing the control switch i I1 and moving
3. A vacuum cleaner having an inlet port for
dirt-laden air, a preliminary dirt separator, suc
tion-creating means connected to said prelimie
nary separator to draw air therethrough, a ?nal
dirt separator of the type in which the back
pressure increases with the collection vof dirt con
nected to said suction-creating means to receive
air exhausted therefrom, dirt-removing means‘to
remove foreign material from said ?nal separa
tor, air-conducting means to connect said dirt
the valve 23 to the port-closing position illus
removing means to ‘said preliminary dirt separa
15
trated in dotted lines in‘ Figure 10. As the valve
tor for collection of said foreign material therein,
23 is provided with the small tab 23a it is pre
valve means to control selectively the ?ow "of air
vented from sealingcompletely the inlet 22 so
through said inlet port' and through said air
that at all times during cleaner operation there
conducting means, pressure-responsive means to
is a partial suction present within the inlet 22
actuate said valve means, and air-conducting
20
and so within the dusting tool hose attached
means to connect said pressure-responsive means
thereto, a su?lcient suction to evacuate the air
to said inlet port.
'
_
therefrom in the event that the nozzle is again
4. A suction cleaner having an inlet port for
placed in sealing relationship with a surface to
dirt-laden air, a preliminary dirt separator, suc
be cleaned. Solong as the nozzle is held out of
tion-creating means connected to said prelimi
25
sealing contact with a surface the valve 23 is
nary separator to draw air therethrough, a ?nal
held in the port-closing position, andthe entire
dirt separator of the type in which the back pres
suction of the machine is effective to draw air
sure increases with the collection of dirt con
through the ?lter-cleaning nozzle, which is ro
nected to said suction-creatingv means to re
tated as in the ?rst embodiment of the invention
ceive air exhausted therefrom, a. driving motor
30
‘as above described, in the ?lter-cleaning opera
for said suction-creating means, movable dirt
tion. Upon the main nozzle being again placed in
removing means to remove foreign material from
sealing contact with a surface undergoing clean- ' , said ?nal separator, air-conducting means to con
ing, however, the air in the dusting tool hose and
nect said dirt-removing means to said preliminary
in- the inlet port 22 is evacuated, the suction
separator for collection of said foreign material »
within the inlet port is reduced, and the bellows 35 therein, clutch means to connect‘said dirt-collect
96 is collapsed against the opposition of the spring ' > ing means to said motor, valve means to control
I03. The collapse effects the snap action of the
selectively the ?ow of air through said‘ inlet port
actuating mechanism controlling the valve and
and through said, air-conducting means, and
the electrical switch II‘! and the ?lter-cleaning
pressure-responsive means connected to a point
40
nozzle is placed out of operation and the valve
of air flow in said cleaner to control said clutch
23 is moved to open position with respect to the
means and said valve means.
port 22.‘
5. A suction cleaner having an inlet port for
I claim:
_
1. A vacuum cleaner having an inlet port for
dirt-laden air, a preliminary dirt separator, ‘suc- '
’ tion-creating means connected to said preliminary
dirt-laden air, a preliminary dirt separator, suc- '
45 tion-creating means connected'to said prelimi
nary separator to draw air therethrough, a ?nal
dirt separator of the type in which the back
separator to draw air therethrough, a ?nal dirt
pressure increases with the collection of dirt con
separator of the type in which the back pressure
nected to said suction-creating means to receive
increases with the collection of dirt connected
air exhausted therefrom,‘ a driving motor for said
60
to said suction-creating means to receive air ex
suction-creating means,- movable dirt-removing
, haus'ted therefrom, dirt-removing means to re
means to remove foreign material from said ?nal
movev foreign material from said ?nal separator,
separator, air-conducting means to connect said
air-conducting means to connect said dirt-remov
dirt-removing means to said preliminary separa
ing means to said preliminary dirt separator for
collection of said foreign material therein, valve
means to control selectively the ‘?ow of air
tor, clutch meansfto connect said dirt-collecting
means to said motor, valve means to control se
lectively the flow of air through said inlet port
and through said air-conducting means, pres
sure-responsive means to' control said clutch
actuate said valve means, and air-conducting
means to connect said pressure-responsive means 60 means and said valve‘means, and air-conducting
through said inlet port and through said air
conducting means, pressure-responsive means to
to a point of air flow in said cleaner.
2. A vacuum cleaner having an inlet port for
means to connect saidipressure-responsive means
to said finalseparator.
6. A suction cleaner having an inlet port for
dirt-laden air, a preliminary dirt separator, suc
dirt-laden
air, a preliminary dirt separator, suc
tion-creating means connected to said prelimi
nary separator to draw air therethrough, a ?nal 65 tion-creating means connected to said prelimi
nary separator to draw air therethrough, a ?nal
dirt separator of the type in which the back pres
dirt separator of the type in which the back pres
sure increases with the collection of dirt con
sure increases with the collection of dirt con
nected to said suction-creating means to receive
nected'to said suction-creating means to receive
air exhausted therefrom, dirt-removing means to
exhausted therefrom, a drivingmotor for said
remove foreign material from said ?nal separa 70 air
suction-creating means, movable dirt-removing
tor, air-conducting means to connect said dirt
means to removeforeign material from said ?nal
removing means to said preliminary dirt separa
separator, air-conducting means to connect said
tor for collection of foreign material therein, valve
dirt-removing means to said preliminary separa
means to control selectively the ?ow of air
through said inlet port and through said air 75 tor, clutch‘ means to connect said dirt-collecting
2,418,513?
13
-
.
,
.
it»
means to said motor, valve means'to control se
lectively the ilow of air through said inlet port
and through said. air-conducting means, pres
-
'
.
move foreign material from said ?nal separator,
air-conductingmeans to connect said dirt-re
' moving means to said preliminary dirt separator,
valve means to control selectively the ?ow of air .
sure-responsive means to control said clutch
1 ‘means and said valve means, and air-conducting
means to connect said pressure-responsive means
through said ‘inlet port and through said air
to said inlet port.
7. A suction cleaner having an inlet port for
dirt-laden air, a preliminary dirt separator, suc
tion-creating means connected to said prelimi
nary separator to draw air therethrough, a ?nal
‘ dirt separator including a ?lter connected to
conducting means, means to determine the pres
.- ence of an excessive amount of dirt in said ?nal
separator making cleaning desirable,’ and means
controlled by said last-mentioned means to actu
ate said dirt-removing means and to move said
valve means. to.in1et-port-closing position to
make the reduced pressure in said preliminary
separator effective in said air-conducting means.
said suction-creating means‘ to receive air.ex
hausted therefrom, a driving motor connected to
11. In a suction cleaner, a main cleaning
nozzle, an initial dirt separator connected to said '
nozzle,‘ a ?nal dirt separator, a cleaning nozzle
said suction-creating means, dirt-removing
means movable over the dirt-collecting surface
of said ?lter to dislodge and to remove fdreign
material from said ?nal separator, air-conduct
ing means to connect said dirt-removing means
for said ?nal separator, suction-creating means
to move air through said nozzles and separators,
directly to said preliminary separator positioned 20 valve means controlling and dividing the ?ow of
air to said suction-creating means between said
for operation at all times during cleaner opera
nozzles, ?uidupressure-operated means to as
certain the flow of air through said main nozzle,‘
and means connecting said fluid-pressure~oper
ated means to said valve means to move. the
latter to reduce the ?ow of air through said main
nozzle upon said flow of air therethrough exceed
ing a predetermined rate and to increase the
tion, clutch means to connect said dirt-removing
means to said motor said suction-creating means
remaining connected thereto, pressure-respon
sive means to control said clutch means, and air
conducting means to connect said pressure-re
sponsive means to a point of variable pressure
in said cleaner.
f
'8. A suction cleaner having an inlet port for
~ dirt-laden air, a preliminary dirt separator, suc
tion-creating means connected to said prelimi~ _‘
nary separator to draw air therethrough, a ?nal
dirt separator including a ?lter connected-to ‘said
suction-creating means ‘to. receive air exhausted
therefrom, a driving motor ’ connected to ' said
suction-creating means, dirt-removing means
movable over the dirt-collecting surface of said
?ow of air through said cleaning nozzle. '
_ 12. A suction cleaner having an inlet port for
dirt~laden air, a main cleaning nozzle connected
thereto and through which cleaning air enters at
a rate variable with the contact of the nozzle
with ‘a surface being cleaned, a preliminary
separator connected to said inlet port, suction
creating means connected to said preliminary
separator to draw air therethrough, a final dirt
separator connected to said suction-creating
?lter to dislodge dirt therefrom to remove foreign
material from said ?nal separator, air-conduct
means to receive air exhausted therefrom, a
ing means positioned at all times to connect said
dirt-removing means to said preliminary sepa
rator to convey dirt from the former to the latter, _~
movable dirt-removing means to remove foreign
clutch means to connect said dirt-removing '
driving motor for said suction-creating means,
material from .said ?nal separator, air-con
ducting means not including said suction-creat
ing means to connect said dirt-removing means
means to said motor said suction-creating means
remaining connected thereto, pressure-respon 45. to said preliminary separator, and means to move
saiddirt-removing means relative to said ?nal
sive means operative during cleaner operation to
control said clutch means, and air-conducting
means to connect said pressure-responsive means
‘separator and over the ?ltering surface thereof
including means controlled by variations in air
, pressure on the inlet side of said preliminary
to said ?nal separator.
9. A suction cleaner having an inlet port for 59
13. A vacuum cleaner having an inlet for dirt
dirt-laden air, a preliminary dirt separator, suc
laden air,‘ a dirt separator for said dirt-laden air
tion-creating means connected to said prelimi
of the type in which the back pressure increases
nary separator to draw air therethrough, a ?nal
with the collection of dirt, suction-creating
dirt separator including a ?lter connected to
said suction-creating means to receive air ex 55 means to move said air through said inlet and
separator, a cleaning nozzle for said separator,
hausted therefrom. a driving motor connected to
air-conducting means-to connect said nozzle to
said suction-creating means, a dirt-removing
a point of suction created by said suction-creat
nozzle movable over the dirt~collecting surface
ing means to move a cleaning» air stream there
of said ?lter to remove ‘foreign material from
said ?nal separator, air~conducting means to iii) through, air?ow-controlling means, controlling
the ?ow of air through said inlet vfor dirt-laden
connect said dirt-removing nozzle to said pre
air and through said air-conducting means, and
liminary separator, clutch means to. connect said
pressure-operated means responsive to pressure
dirt-removing nozzle to said motor said suction
in said separator ccntrolling__ said air-?ow-con
creating means remaining connected thereto,
trolling means and adapted to reduce the flow
pressure-responsive means to control said clutch
of air through said inlet and to effect a ?ow of
means, and air-conducting means to connect said
air through said air-conducting means in the
pressure-responsive means to said inlet port.
presence of a predetermined pressure in said
10. A vacuum cleaner having an inlet port for ' separator.
‘
dirt-laden‘air, a preliminary dirt separator, suc
M. A vacuum cleaner having an inlet for dirt-'
tion-creating means connected to said prelimi 70
laden air, a dirt separator for said dirt-laden air
nary separator to draw air therethrough, a final
of the type in which the back pressure increases
dirt separator of the type in which back pressure
with the collection of dirt, suction-creating
increases with the collection of dirt connected
means including a motor to move said air
to said suction-creating means to receive air ex
through. said inlet and separator, a movable
hausted therefrom, dirt-removing means to re
separator.
75
_
,
cleaning nozzle for said separator,.air-conduct
2,418,587
e
16
v
15., In a suction cleaner, surface-cleaning
ing means to connect said nozzle to a point of
suction created by said suction-creating means
means, an initial dirt separator connected to
to move a cleaning air stream therethrough, air
flow-controlling means controlling the ?ow of
rator, cleaning means to clean said ?nal dirt
said surface-cleaning means, a final dirt sepa
separator, suction-creating means to move air
through both of said cleaning means and both‘
through said air-conducting means, power-trans
of said dirt separators, valve means to control
mission means including clutch means to con
the flow of air through both of said cleaning
nect said nozzle to said motor, and pressure
means, and ?uid-pressure-operated means con
operated means responsive to pressure in the
nected to said valve means and having an open
stream of air moved by said suction-creating 10 ing exposed to the air pressures passing through
means to close said clutch means to drive said
said final separator to operate under predeter
nozzle and to actuate said air-fiow-controlling
mined air pressures in said ?nal separator for
means to reduce the flow of air through said in
actuating said valve means to reduce the flow of
let and t0 e?ect a flow of air through said air 15 air passing through said surface-cleaning means.
conducting means and said nozzle for the pur
pose of removing dirt fromlsaid separator, and a
DONALD G. SMEILIE.
air through said inlet for dirt-laden air and
a
dirt receptacle for the dirt removed by said
nozzle.
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