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Патент USA US2406733

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~ Sept;._ 3, 1946.
Filed April 26, 1945
s Sheets-Sheet 1
Louis K. Acheson
Sept. 3, 1946.
Filed April 26,‘ 1-943
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Iouis K. Acheson
Sept. 3, 1946.
, |_. K. ACHESON
2,406,733 _
Filed April 26, 1943
3 Sheds-Sheet 3
Louis K. Acheson
Patented Sept. 3, 1946
LouisK. Acheson, North Canton, Ohio, assignor to
The Hoover Company, North Canton, Ohio, a
corporation of Ohio
> Application April 26, 1943; Serial No. 484,510
(01. [183-57)
11 Claims.
The present invention relates to suction clean
ers in general and more particularly to a new and
through the suction-creating fan unit and the
speed-reducing means, being taken upon the line
novel arrangement of parts in a suction cleaner.
4-4 of Figure 2; and
Figure 5 is a vertical section through a cleaner
More speci?cally, the invention comprises an im
proved type of suction cleaner in which the dirt 5 constructed in accordance with a second. preferred
embodiment ofthe'invention which is character
laden air stream is drawn by the suction-creating
ized primarily by being’ provided with individual
means of'the cleaner through an initial dirt sep
suction-creating means for the ?lter-cleaning
arator and is exhausted by the suction-creating
meansrinto a ?nal ‘dirt-separator, means being
The usual modern cleaner embodies a'suction
provided which continuously clean the ?nal sep 10
creating unit which draws air from the surface:
arator and remove the collected foreign mate
contacting nozzle and which moves it to a dirt
rial therefrom and transfer it back to the initial
?ltering unit whichlis permeable to air but im
permeable to dirt and; which therefore functions
It is an object of the present invention to pro
vide a new and improved suction’ cleaner, It is 15 to restrain and retain the dirt while permitting
the air to escape into the ambient atmosphere.
another object of the invention to provide a new
This usual type of machine has the objection
and improved suction cleaner of the type incor
that the dust bag must be cleaned at intervals
‘ porating an initial dirt separator and a ?nal dirt
in order that the machine remain operative, for
separator. A still further object of the inven
tion is to provide a suction cleaner having a plu 20if not cleaned the resistance to the ?ow'of clean
ing air through the bag becomes excessive there
rality of dirt separators, the ?nal dirt separator
by reducing to the point of inoperativeness the
being provided ‘with cleaning means. Still an
other object of the invention is to provide a
suction cleaner of the type in which an initial sep
@ ?ow of air through the machine. Other-types of
arator has its dirt-?ltering actionsupplemented 25
by a ?nal separator, there being continuously op
erated means provided which remove the dirt
from the ?nal separator and return it to the ini
tial separator. .A still further object of the in
vention is to provide a suction cleaner of the
type having an initial separator from which air
is drawn by. the suction-creatingmeans of the
cleaner which exhaust substantially cleanair into
cleaners have been designed incorporating what
is called mechanical dirt-separating means, that
is, means which usually rely upon centrifugal
force, etc., to effect the separation of the dirt
from the carrying air stream rather than vupon
the ?ltering action of a ?lter such as a cloth bag.
These mechanical separator machines, however,
have all been characterized by the objection that
they permitted the escape into the atmosphere
of a very small'fraction of the dirt carried by
the air stream and this escaped dirt was of a type
driven rotary ?lter-cleaning nozzle removes the 35 which created a noticeable dust odor. 'Could the
escape of this very small percentage of foreign
dirt from the ?nal separator and returns it to the
initial separator. These and other more speci?c
material be eliminated that type of machine would
objects will appear upon reading the following
have certain advantages for a'mechanical sep
speci?cation and claims and upon considering in
arator need not be removed to be cleaned but in
connection therewith the attached drawings to 40 stead it is necessary only to remove a dirt con
which they relate.
tainer or pan which is very easily emptied;
Referring now to the drawings in which pre
The suction cleaner of the patent to; Bible
ferred embodiments of the present invention are
2,247,472 comprises a recognition of this problem
45 and provides a solution which is a material ad
' , Figure 1 is a vertical section through a suction
vancement over the prior art. The Bible patent
cleaner constructed in accordance with the pres’
provides an initial dirt separator from which
a ?nal dirt separator and in which a constantly
ent invention;
cleaning air is drawn _by the suction-creating
Figure 2 is a transverse horizontal section
‘means which in turn exhaust the substantially
through ‘the speed-reducing means by which the
clean air into a ?nal ?lter. To prevent the undue
?lter-cleaning nozzle is driven from the main
accumulation of foreign material in this?nal
motor shaft, being a section taken upon the lines
?lter there is provided a manually operable ?l
2-2 of Figures 1 and 4;
ter-cleaning nozzle whichsis connectible to the
Figure3 is a section upon the line 3—3 of Fig
intake of the initial dirt separator and which,
Figure 4 is an enlarged partial vertical section 55 when in operation, functions to clean the ?nal
ure 2;
separator and to reconvey the foreign material
therefrom into the initial separator.
The present invention represents an improve
ment over the construction of Bible 2,247,472 in
that it provides, in a cleaner of the basic Bib-1e 5
partially within the upper end of casing I. The
rotation of the motor shaft 28 causes the tandem
fans 26 and 21 to draw cleaning air in through
the inlet port 23 and to remove the cleaned air
upwardly through the inlet I3 into the fan cham
type, means which continuously maintain the ?nal
ber from which it is exhausted through suitable
?lter in a clean condition and ‘which continuous
ports 35 into a surrounding chamber which is
ly return foreign material from that ?nal ?lter
indicated at 3| and which will be called the ?nal
to the initial separator where it can be removed,
?lter chamber for a reason which will become
an agglomerating action having taken place in 10 apparent. De?ning the side wall of the ?nal ?l
the collection on the ?nal ?lter. In one embodi
ter chamber 3| and spaced inwardly from the
enclosing main casing I is a cylindrical ?lter ele
ment of the invention, as will be hereinafter de
scribed, separate suction-creating means are pro
ment 32 formed of suitable air-permeable dirt
vided for the ?lter-cleaning nozzle and which
impermeable material such as ?lter cloth. Fil
effect the return of the foreign material from that
ter 32 is supported at its lower end by a ?anged
nozzle to the initial separator.
collar 33 ?xedly carried by the casing 9. At its
Referring again to the drawings, and to Fig
upper end ?lter 32 is carried by a shouldered
portion of a centrally apertured and ?anged
ures 1 to 4 inclusive in particular, the ?rst pre
plate 34 which seats in sealing relationship upon
ferred embodiment of the invention is illustrated.
A cylindrical main casing I seats, at its central
the lower end of the casing of motor 29 and
ly apertured and ?anged bottom plate 2, upon a
which is itself ?xed in spaced relationship to the
supporting base 3 which seats a removable dirt
enclosing main casing I by means of spiders 36
pan or container 4, the upper peripheral edges
which may be integrally formed. Collar 33 and
of which are in sealed contact with the bottom
upper plate 34 form end enclosures for the ?lter
plate 2. The upper end of the cylindrical casing 25 chamber 3I and air escaping therefrom must
I is closed by a motor hood ,6 which includes an
pass outwardly through the ?lter element 32 into
inwardly ?anged motor-supporting wall ‘I.
Positioned concentrically within the main cas
that space between the ?lter and the main cas
ing I is a smaller cylindrical casing 9 which is
character 31 and which will be referred to as
ing I which space is indicated by the reference
carried by the inner ‘?anged peripheral edge of 30 the discharge chamber.
the bottom plate 2 of the casing I. A transverse
Discharge chamber 3'! is closed at its upper
closure wall II divides the cylindrical casing 9
end by the plate ‘I and at its lower end by the
into a lower whirl chamber I2 and upper fan
bottom plate 2 of casing I and the only escape
chamber I3, the latter being itself divided into
therefrom is afforded by the apertures 38 formed
a lower stage and an upper stage by a centrally 35 in the casing of motor 29 upon the opposite sides
positioned de?ector I4. De?ector I4 is formed
with a multiplicity of ?xed guide'vanes which
function to direct the air to the central inlet
formed therein and which is indicated as I6.
The top of the fan chamber I3 is closed by cover 40
plate I1 of the cylindrical casing 9 while the
bottom of the fan chamber is provided with a
of the supporting wall ‘I in the hood 6. Air en
tering the lower apertures 38 passes upwardly
through the motorrcasing and escapes from the
upper apertures and effects a cooling of the mo
tor in doing so which is desirable. The motor
hood 6 above the plate 1 is provided with an ex
haust port 38 adapted to receive and seat a dust
ing tool unit when it is desired to use the cleaner
as a blowing unit and serves at all times as the
downwardly extending elongated inlet I8 which
reaches downwardly beyond the mid-portion of
the whirl chamber I2. Vertically spaced spiders 4 01 cleaner exhaust port. Incidentally, the driving
I9 within inlet I8 support a downwardly extend
ing rod 20 carrying a transverse closing plate 2|
at its lower end and a strainer 22 immediately
below the ‘lower spider I9. Plate 2'! is spaced
inwardly from the wall of casing 9 and provides
a peripheral opening through, which the foreign
material can drop from the whirl chamber into
the dirt pan 4 while the strainer .22 prevents the
passage upwardly into the suction-creating fan
chamber I3 of large size foreign objects.
The inlet of the cleaner comprises a port 23
which is adapted to receive and seat the cleaner
end of a dusting tool hose 5 which at its outer
end carries a suitable cleaning nozzle l0. Inlet
23 passes inwardly through the outer cylindrical
casing I and connects directly to an inlet cham
ber 24 which opens tangentially into the whirl
chamber 12. The construction is such that air
entering through the inlet 23 and chamber 24
enters the whirl chamber tangentially resulting
in a circular rotary movement of the air which
tends to throw the foreign material outwardly
and permits it to drop downwardly and into the
dirt pan 4.
Within the suction-creating fan chamber 13 is
positioned a two-stage fan comprising a lower
rotary fan 26 and an upper fan 2?, both carried
by the downwardly depending shaft 28 of a mo
tor 29 which is carried by the wall ‘I and is posi
motor 29 is provided with incoming power leads
4| which are connected to a suitable manually
operable switch 42 to enable the operator to con
trol the operation of thelmotor and so of the
50 entire cleaner.
The machine which has hereinbefore ‘been de
scribed comprises a completely operative cleaner,
but one which has'the inherent defect that no
means have been provided to clean the ?lter 32.
55 To accomplish this desirable result there is pro
vided, in accordance with applicant’s invention,
an elongated nozzle 6.16 the length of which is
equal to the height of the ?lter element 32 and
which is adapted to make sliding contact there
60 with. Nozzle 43 has a ?lter-contacting opening
or mouth which contacts only a limited area of
the ?lter element 32 in any one position and
accordingly means are provided to move the
C) Ul nozzle relative to the ?lter.
This is accom
plished by supporting nozzle 46 by a rotatable‘
conduit seat 41 which encloses the vertical sleeve
49 housing the motor shaft 28. Conduit 4‘! is
formed at its inner end with a downwardly fac
ing circular seat which is rotatably mounted
upon a supporting bearing 5! carried by the sim
ilarly shaped upwardly opening mouth of a sta
tionary conduit 52. The latter conduit is mount
ed on the top plate I] of casing 9 and extends
tioned partially within the motor hood 9 and 75 across the top and down the side thereof to con
which conduit 52 opens at the intake chamber 24.
nect to the inlet chamber 24 of the whirl cham
Aslpreviously described, the velocity of the ?lter
cleaning nozzle 46 is relatively slow as the result
of the speed-reducing mechanism which is housed
within housing 51 and which has been described in
' It is undesirable that the ?lter-cleaning nozzle
46 should rotate and move vover the vsurface of
the ?nal ?lter 32 at a speed approaching the
speed of rotation of the fan or motor shaft 28 and
accordingly speed-reducing means are provided to
detail above.
The continuous cleaning of the ?nal ?lter 32
prevents the back pressure in the chamber 3|
enable the motor to drive the nozzle but at, a
from building up beyond a reasonable point which
reduced speed. These means, including a‘worrn
56 carried by the motor shaft 28, are positioned 10 can be controlled by the speed of movement of
the nozzle and by the volume of air ?owing there
within a housing 51 located immediately below
through. The return of the escaped foreign ma
the motor 29. Shaft-enclosing sleeve 49 is pro
terial to the initial separator I2 makes possible
vided with a slot-like opening 58 adjacent worm
substantially the entire removal of the returned
56 and extended through this opening and into
material for, it has been found, this material in
engagement with the worm 56 is a gear 59 carried
collecting upon the ?nal ?lter 32 becomes ag~
by a transverse horizontal jack shaft 6| which is
glomerated, thereby increasing in size and mass.
itself rotatably mounted in bearings 63 carried by
After the machine has been used for a con
brackets 62 supported from the top wall of the
side'rable period of time the dirt container 4 will
housing 51. Shaft 6| itself carries a worm 64 at
a point spaced from its gear 59 and this worm'in 20 become ?lled with foreign material and should
be emptied. This can be accomplished by re
turn meshes with a gear 66 carried by a second
moving the top casing I from the base 3 thereby
and vertical jack shaft 61. Shaft 61 is rotatably
enabling the pan 4 to be removed upwardly from
mounted in bearings 68 carried in the upper and
the base 3 or, if desired, pan 4 may be slid trans
lower walls of housing 51 and is continuously ro
versely from the base, depending upon the typ
tated. A gear 69 is ?xedly connected to shaft
of construction which is used. >
61 near its lower end and transmits the continue
Referring now to Figure 5 in particular, the
ous driving force from shaft 61 to a large gearv
second preferred embodiment of the invention is
H which carries a bearing 12 rotatably seating
- illustrated and differs primarily from the ?rst
upon the sleeve 49. Gear 69 is ?xedly connected
to the conduit-seat 41 of nozzle 46 by means of 30 described embodiment in that a second and sep
suitable rivets 13. A coil spring 14 surrounds the
sleeve 49 and exerts a downward force upon the
top of the bearing 12 and thereby forces the con
duit seat 41 against its supporting bearing 5|, a
suitable shoulder 16 being provided upon the 35
sleeve 49 to seat the spring.
arate suction-creating fan unit is present which
provides the suction for the ?lter-cleaning nozzle.
In this second preferred embodiment of the in
vention the cylindrical main casing is referred
to by the reference character I0 I, its ?anged bot
tom plate by the character I02, and its support
ing base by the character I03. A dirt pan I04 is
positioned within the base I03 and, sealed to the
bottom plate I02 of the main casing. In this em
The operation of this ?rst preferred embodi
ment of the invention is as follows: The operator
having attached suitable dusting tools including
a ?exible hose 5 and a nozzle I0 to the inlet 23
bodiment, however, the motor is not positioned at
of the machine, closes the electrical switch 42
thereby causing electrical current to pass through
the driving motor 29. The rotation of the motor
‘ the top of the device and accordingly there is no
shaft 28 immediately ensues and with it the rota
tion of the suction-creating fans 26 and 21 within
the chamber I3. Air and dirt are drawn through
motor hood at the top of the casing IOI which
instead is closed by a top plate I06 which is cen
trally provided with a suitable removable cover
\ plate I01.
An inner cylindrical casing is indicated by the
the cleaning nozzle, the dusting tool hose, the
inlet port 23 and into the whirl chamber I2, in
which its circular motion causes the foreign ma
terial suspended therein to be thrown radially out
ward under the action of centrifugal force and it
drops downwardly and around the peripheral
edge of the plate 2| into the pan 4. The clean
air is drawn upwardly through the inlet I8 by,
the action of the fans 26 and 21 and is exhausted 01 Ur
from the second stage fan 21 into‘the ?nal filter
chamber 31. From the latter chamber it passes
outwardly through the ?nal ?lter 32 into the dis
charge chamber 31 leaving upon the ?lter 32 that
very small percentage of foreign material which
has escaped from the whirl chamber I2. The air
continues on its way and passes upwardly and
through the ports 38 of the casing of motor 729
and ?nally makes its exit at the top of the ma
chine from the motor hood 6 via the exhaust
port 39.
During this operation, the ?lter-cleaning nozzle
reference character I08 and a separating wall I09
divides the casing I08 into a whirl chamber III
and thereabove a fan chamber “2, there being
a downwardly extending inlet IIO for the fan
chamber which is identical to that present in
the ?rst embodiment. Fan chamber “2 is di
vided, as in the ?rst embodiment, by the sta
tionary de?ector I I3‘ into a ?rst stage and a sec
ond‘stage which are connected by an inlet II4. I
The suction-creating fans in this embodimentare
represented by the reference characters H6 and
H1 in the ?rst and second stages, respectively,
.both being carried by the depending motor shaft
60 here indicated at I I8. The top of the cylindrical
casing I08 and of the fan chamber H2 is formed
'by a plate |I9 which in this instance directly
supports the cleaner motor I2I, the enclosing
casing of which is flanged, as at I22, for heat‘
radiation purposes.
As in the ?rst embodiment the upper or second '
stage of the fan discharges into a ?nal ?lter
chamber which is here indicated by the reference
character I23. The bottom wall of chamber I23
isv formed by a ?anged collar |24 secured to the
46 has been moving at slow speed in a circular
path and along the interior dirtied surface of the
?lter 32 and has effected the reversal of the
inner cylindrical casing I08 and the top wall by
direction of the flow of air through the ?lter 32
a. ?anged plate |26 which is secured at its aper
in the contacted area. This reversed ?ow of air is
tured center to the cylindrical casing I21 which
drawn from the discharge chamber 31 into the
is carried by the top wall I06 of the casing NH.
nozzle 46 and passes through conduits 41 and 52
‘under the suction of the ‘whirl chamber I2 into 75 The side wall of the ?lter chamber comprises the
?lter element I28 which is ?xedly secured to the
top and bottom walls I24 and I26 and is spaced
concentrically within the enclosing cylindrical
casing, Iiii which provides therearound the dis
charge chamber I29, as in the preceding embodi
ment. In this embodiment the main casing I BI is
formed with both the inlet port ISI, which ex
casing I 21. Here, as in thew?rst embodiment,
however, the foreign material removed is con
veyed via the conduit I43 into the whirl chamber
at the inlet chamber I32. The advantage of the
separate suction-creating means for the ?nal
?lter-cleaning nozzle lies in the entire air-mov
ing ability of the main fan unit being available
tends therethrough into an inlet chamber I32
for the drawing of air through the ?lter-curtain.
, forming a part of the whirl chamber III, and
I claim:
1. In a suction cleaner of the type having an
alsowith a discharge port I33, there being no 10
initial dirt separator, suction-creating means to
draw air from said initial separator and includ
The parts which have heretofore been described
ing a fan and a motor directly connected thereto,
in connection with the second embodiment of the
invention represent an operative cleaner with the
and a ?na1 dirt separator to receive air from said
exception of the ?lter-cleaning means for the 15 suction-creating means; a dirt-removing unit to
remove dirt from said ?nal separator and to
?nal ?lter, and in this embodiment of the inven
tion these means differ in material respects from
transport it to said initial separator and includ
ing a movable element, and power-transmitting
those of the ?rst embodiment. In this embodi
ment the shaft I I8 of the motor extends both
and speed-reducing means connecting said mov
below and above the casing and at its extreme 20 able element to said motor to actuate said ele
upper end carries, within the casing I21’, a plu
ment in the operation of said cleaner at a speed
rality of rotatable fans I36, I31 and I38 which
less than the speed of said fan.
are separated by stationary de?ectors I39. Cas
2. In a suction cleaner of the type having an
ing I 21,» which is in fact a fan chamber, is formed
initial dirt separator, suction-creating means to
centrally in its bottom with an intakev I45} to 25 draw air from said initial separator and includ
which connects the rotatable conduit seat EM of
ing a fan and a motor directly connected thereto,
a ?lter-cleaning nozzle I62, a suitable sealing
and a ?nal dirt separator to receive air from said
bearing I44 being present therebetween. The
suction-creating means and including a cylindri
outlet of fan chamber I21 connects to a discharge cal ?lter element; a dirt removing unit to remove
conduit M3 which extends directly to the inlet 30 dirt from said ?nal separator and to transport it
chamber I312 of the whirl chamber VIII. The
to said initial separator and including a movable
?lter-cleaning nozzle I42 is again rotated by
nozzle, and power-transmitting and speed-reduc
speed-reducing means driven by the cleaner mo~
ing means connecting said movable nozzle to said
tor I2 I. This speed-reducing‘ means is positioned
motor to actuate said nozzle at a speed less than
within the housing I55 immediately above the 35 the speed of said fan in a circular orbit in con
motor I2I and is identical'with that described
tact with said cylindrical ?lter element in the
in connection with the ?rst embodiment with
operation of said cleaner.
the exception that it is inverted, that is,- it is
3. In a suction cleaner of thetype having an
reversed end for end being above the motor rather
initial separator, a suction-creating fan unit to
than below.
40 draw air through said initial separator, a motor
The cleaner-actuating motor I2! is again pro
having a shaft connected to said fan unit, and
vided with suitable incoming power leads Hi3 and
a ?nal ?lter interiorly connected to said unit to
a manually operable switch I-FI'I which controls
receive air exhausted therefrom and including a
the ?ow of current to the motor and so renders
?lter element surrounding said shaft; a ?lter
it operative or inoperative at the operator’s elec
cleaning nozzle interiorly connected to a source
tion. Additionally, and as in the ?rst embodi
of suction and mounted for movement about said
ment, a transverse plate, there indicated by I45,
shaft in contact with said ?lter element, and
is provided at the lower end of the whirl chamber
power-transmitting speed-reducing means con
necting said nozzle to said shaft to move said
The operation of this second embodiment of 50 nozzle during the operation of the cleaner.
the invention is as follows: Upon the operator
1i. In a suction cleaner of the type having an
closing the actuating switch III'I, having previous
initial separator, a suction-creating fan unit to
ly attached dusting tools including hose and noz
draw ‘air through said initial separator, a motor
zle to the inlet port I3I, air is drawn through
having a shaft connected to said fan unit, said
the dusting tool and into the whirl chamber III ,
fan unit being positioned between said initial
‘by the action of the suction-creating fans H5
separator and said motor, and a ?nal dirt sep
and I IT. The incoming dirt-laden air enters the
arator enclosing said fan unit; dirt-collecting
whirl chamber III tangentially and the foreign
and-removing means movable in said ?nal sep
material is separated as in the ?rst embodiment,
arator to carry dirt to said initial separator, and
the clean air entering the fan chamber IIZ 60 power-transmitting speed-reducing means con
through the elongated inlet III}. The cleaned
necting said dirt-collecting-and-removing means
air is discharged from the ?nal stage of the suc
to said motor shaft.
.tion-creating fan unit into the ?nal ?lter chamber
5. In a suction cleaner of the type including
I23 from which it is exhausted outwardly through
an initial separator, a suction~creating fan unit to
the ?nal ?lter I28 into the discharge chamber
vdraw air through said initial separator, a motor
I29 making its way therefrom via the exhaust
having a shaft connected to said fan unit, said
port I33 into the surrounding atmosphere.
fan unit being positioned between said initial
As in the ?rst embodiment, the ?lter-clean
separator and said motor, and a ?nal dirt sep
ing nozzle, here indicated as I42, is slowly moved
arator to receive air exhausted from said fan
in a circular orbit around and in contact with
unit and including a ?lter element spaced radi
the interior of the ?nal ?lter I28 removing for
ally with respect to said motor shaft; a cleaning
eign material therefrom. In this instance, how
nozzle movable relative to said ?lter element, air
ever, the suction to the ?nal ?lter is provided by
conducting means connecting said nozzle in all
the separate fan unit positioned above the motor
and comprising the fans I36, I31 and I38‘ of the 75 positions to the inlet of said initial separator,
motor hood as in the ?rst embodiment.
and power-transmitting means connecting said
nozzle to said motor shaft.
exhaust it in said initia1 separator, and a driving
motor connected to said suction-creating units.
6. In a suction cleaner of the type having an
9. In a suction cleaner of the type having an
initia1 separator, a suction-creating fan unit to'
initial dirt separator, a ?nal dirt separator, and
draw air through said initial separator, a motor
a cleaning nozzle movable with respect to said
having a shaft connected to said fan unit, a ?nal
?nal separator to collect foreign material there
?lter interiorly connected to said unit to receive
from; a pair of suction-creating fan units, one of
air exhausted therefrom and including a ?lter
said units being connected to draw air from said
element surrounding said shaft, an enclosing cas
initial separator and to exhaust it in said ?nal
ing, an inlet port to said initial separator ex 10 separator, the other of said units being connected
tended through said casing, and an outlet port
' to draw air through said nozzle and to exhaust
to discharge air exhausted from said ?nal sep
it in said initial separator, a driving motor, and
arator; a rotary cleaning nozzle adapted to ro
means connecting said motor to said fan units
tate about said motor shaft in contact with said
and to said nozzle to actuate same in the oper
?lter element, an air-conducting nozzle seat en
ation of the cleaner.
closing said motor shaft and supporting said
nozzle for rotation, power-transmitting speed
10. In a suction cleaner, an initial dirt sep
arator, air-conducting means to conduct a dirt
reducing means connecting said nozzle to said
laden air stream to said initial dirt separator suc
shaft to rotate said nozzle at reduced speed, and
tion-creating means to draw air from said initial
air-conducting means connecting said nozzle seat 20 separator and including a fan and a motor di
to said initial separator.
rectly connected thereto, and a ?nal dirt sep
7. In a suction cleaner of they type having an
arator to receive air from said suction-creating
initial dirt separator, suction-creating means to
means; a movable nozzle to remove dirt'from said
draw air from said initial separator and includ
?nal separator, air-conducting means connecting
ing a fan and a motor directly connected there
said nozzle to said initial separator to make avail
to, and a ?nal dirt separator to receive air from
able the suction thereof to said nozzle and to
said suction-creating means; a dirt-removing
transport dirt from said nozzle, and power-trans
unit to remove dirt from said ?nal separator,
mitting means connecting said nozzle to said m0
second suction-creating means driven by ‘said
motor connected to said dirt-removing unit to ‘
draw air therethrough, air-conducting means
creating means to said initial separator, and
power-transmitting means connecting said dirt
removing unit to said motor to actuate said unit
at reduced speed in the operation of the cleaner.
8. In a suction cleaner of the type having an
initial dirt separator, a, ?nal dirt separator, and
a cleaning nozzle movable with respect to said
from; a pair of suction-creating fan units, one
of said units being connected to draw air from
initial dirt separator, suction-creating means to
draw air from said initia1 separator and includ
ing a motor, and a stationary ?nal dirt separator
including a ?ltering surface to receive air from
connecting the exhaust of said second suction
?nal separator to collect foreign material there
11. In a suction cleaner of the type having an
said suction-creating means; ?rst air-conducting
means to conduct a dirt-laden air stream to said
initia1 dirt separator, second air-conducting
means to convey an air stream from said ?nal
dirt separator to said initial dirt ‘separator, and
nozzle means driven by said motor to dislodge
foreign material from the surface of said ?nal
dirt separator for conveyance through said sec
said initia1 separator and to exhaust it in said
ond air-conducting means to said initial dirt sep
?nal separator, the other of said units being con
arator during the operation of the cleaner.
nected to draw air through said nozzle and to 45
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