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Патент USA US2404358

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July'23,1946.'
w, .5 BIBLE
‘
.
2,404,358
VACUUM CLEANING SYSTEM
Filed Feb. 10, 1941
~
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INVENTOR.
Wm. TL'R f. 5/5‘:
2,404,358
Patented July 23, ‘1946
‘UNITED STATES PATENT, OFFICE
_ '
2,404,358
VACUUM CLEANING SYSTEM
Walter E. Bible, Denver, 0010., assignor, by mesne
assigmnents, to The Hoover Company,‘ North
Canton, Ohio, a corporation of Ohio
Application February 10, 1941, Serial No. 378,236
14 Claims.
(01. 183——57)
1
Figs. 1 and 2 a blower is indicated diagrammati
cally at In with its suction conduit at H and dis.
This invention relates to vacuum cleaning sys
tems and more particularly to methods for clean
ing the ?lter medium of a vacuum cleaning system
to remove accumulated debris which interferes
with the passage of the air.
In the usual vacuum cleaning apparatus, a fab
ric bag or drum is employed to remove foreign
particles from the incoming" air ‘stream. The
pores or interstices ofthe fabric quickly become
clogged with dust and lint which creates a back
pressure on the blower and greatly reduces the
effective suction of the cleaner. The only pro
vision usually made for cleaning the bag is to
charge conduit at l2, The suction conduitll,
leads from a depending, axial position within a
cyclone or whirl vchamber l3 in the bottomnof
' which is a debris collecting receptacleor dust pan
M. A suction nipple I5 enters tangentially into
the whirl chamber and the air to be cleaned is
conducted to the nipple I5 by means of’ a ?exible
' hose l6 froma cleaner’ nozzle H or in any other‘
desired manner.
_
,
.
The discharge conduit terminates in a ?lter
chamber l8 having a fabric ?ltering wall ‘l9
through which the air discharges. A hollow an.
allow its removal for dumping purposes. Such a
procedure only removes the loose coarse dirt and W nular or circular ?lter cleaning device 2031s ,posie
tioned within the fabric wall upon the lower vex:
the ?lter medium itself remains clogged with
tremity of a vertically movable tube v2 l_ which is
debris.
.
I
The‘principal object of this improved system
I normally closed by a cap 23.
The upper edge of
the device 20 constantly contacts the fabric wall
is to provide means for completely cleaning the
?lter medium by the reversal of the ?ow of air 20 and the lower edge is inset therefrom and between
the two edges is an open slot 22.
therethrough so that all particles will be blown
_
,
from place in the ?ltering fabric; to combine
mechanical cleaning with air cleaning of the ?lter
medium; and to accomplish all of the above with
When in use ‘the. incoming ail‘ whirls in the
whirl chamber l3 and drops the major portion of
Other objects and advantages reside in the
detail construction of the invention, which is de
signed for simplicity, economy, and efficiency.
When it is desiredto clean the ?lter, the nozzle
11 is removed and the suction extremity of the
hose I6 is connected to the upper‘extremity of
its suspended debris into the dust pan Ill.v Some
in the system or machine by the use of the regular 25 of the lighter particles, will be carried over to the
‘?lter chamber l8 where they will be ?ltered out
vacuum blower without removal of’ the ?ltering
as the air exits through the ?lter medium I9.
devices.
These will become more apparent from the fol
lowing description..
, 30
the tube 2|, as shown in Fig. 2 to create‘ a vacuum
within the ?lter cleaning device 20. The device
29 is manually lifted and lowered in the chamber
In the following detailed description of the in
by means of the tube 2!. The device acts as a
vention reference is had to the accompanying
drawing which forms a part hereof. Like nu W Li- dividing partition to maintain a pressure in the
upper portion of the ?lter chamber and a partial
merals refer to like parts in all views of the draw
vacuum
in the lower portion. Thus as the device
ing. and throughout the description.
is moved up and down the ?lter medium is alter
All of the views of the drawing are simply
nately subjected to a blowing action and a suck
diagrammatic views in which the details of con
ing action in addition to a mechanical ‘rubbing ‘
40
struction have been omitted. These details are
which quickly. and thoroughly removes the .im
well within the skill of anyone familiar with the
pacted dirt therefrom- The removed dirt is
art.
'
drawn through the tube 2| and the hose It to the
In the drawing:
,
.
whirl ‘chamber where, due to its packed accumu
Fig. 1 illustrates one form of the improved sys
lated condition, it is dropped into the dust pan
tem as it would operate when in use;
‘
M with the previously accumulated debris. The
Fig. 2 isa similar diagram illustrating the op
‘hose is then removed from the tube 2|, the cap
eration of cleaning the ?ltering drum of the sys
23 replaced and the system is again ready for use.
tem of Fig. 1;,
r
Fig. 3 illustrates an alternate form of the sys
tem as it would operate when in use;
_
Fig. 4 illustrates the method of cleaning the
?lter medium‘ of the form of Fig. 3.
In Figs. 3 and 4 an alternate method of accom
plishing the same results is illustrated. In this
form the same blower,-whirl chamberysuction
The ?rst two methods illustrated employ the
hose, etc. are employed as in the previous form.
vIn this form, however, a fabric ?lter wall 24 sur
reverse air principle combinedwith agitation of
the ?lter medium for cleaning the latter. In
of a horizontal partition plate 25 into an upper
rounds a filter chamber which is divided by means .
.
compartment 26' and a lower compartment 27.
The discharge conduit of the blower extends
downwardly through the plate 25 into both com
Y
4'
'
,
.
in contact‘ with said nozz1e,'ana suction-creating
means to draw air through said nozzle.
.
5; A method of cleaning the fabric wallof a
continuously operating ?lterchamber of a vacuum
' partments and a suction tube 28 extends upwardly
through both compartments. Both the discharge
cleaning system comprising: forcing dirt-laden
conduit and the tube 28 are provided with ports
29 in both compartments and ,both are provided
air through one area. of said wall in one direc
with rotatable valve sleeves 30 having, ports 31
of the same wall in the opposite direction, the
areas of said wall through‘which'the air is forced
tion and drawing clean airv through asecond area
the rotation of which opens the ports 29in‘ either
compartment as desired.
.10. ,or drawn being of su?icient extent as to ?ex to
a When in use the valve sleeve on the discharge," ' dislodge foreign material and beingvariable and
conduit is so positioned that its ports'are open" ' beingdetermined by the movement of a dividing
to 'both compartments so that the incoming air
) member along said wall.
enters both compartments anddischar'ges uni-v
6. .In a vacuum cleaner of the type-comprising:
formly through the fabric ?lter wall 24. When 15 ‘a whirl chamber, means for collecting debris at
it is desired to clean the fabric, the suction hose‘ a the bottom of said whirl chamber, means for in
is attached to the top of the'tube 28 and the
troducing dust-laden air tangentially into said
blower started. The‘ sleeve valves are then ro
Whirl chamber to centrifugally deposit a portion
tated to place the two compartments alternately '
of the dust therein, and a motor operated blower
under suction and compression. For instance in 20 positioned to withdraw air from said whirl
solid line in Fig. 4' the‘ upper compartment is.
chamber; a ?lter chamber including top and ‘bot
under compression from‘ the blower discharge
tom walls and an air-pervious wall therebetween,
conduit and the lower compartment is under par-.
a movable partition member enclosed by the air
tial vacuum from the tube. The valve
I‘
sleeves "
pervious wall of said ?lter chamber to divide the
are now rotated to reverse this condition as 25 latter into two compartments the size’of which
shown in broken line in Fig. 4 so that the filter
. varies upon movement of said partition member,
fabric is alternately subjected to vibration and-to
oppositely moving ‘air blasts which quickly looseri
means to conductair-under pressure to one of
said compartments, and means to conduct 'air
and carry away the accumulated dirt and deposit 4
from the other of
it in the dust pan of the whirl chamber.
_
‘I
30 whirl chamber.
, While a speci?c form of the improvement has
a whirl chamber; means for collecting debris at
the bottom of said whirl chamber, means for in
troducing dust-laden air tangentially into said
sired to be understood that the same may be
‘ ' varied, within the scope of the appended claims,
without departing from the spirit of the inven
-
‘
r
7. In a vacuum’cleaner of the type comprising:
vbeen described and illustrated herein; ityis‘ def
tion.
said _‘ compartments to said
35
,
whirl chamber to centrifugally deposit'a portion
* of the dust'therein, a motor operated blower po
Having thus describedthe invention, what is
claimed and desired secured by Letters Patentis:
sitioned to withdraw air from said whirl cham
ber; a ?lter chamber including top and‘ bottom,
1. A method of cleaning the porous'wall of a
walls and an air-perviou's wall- therebetween, a
?lter chamber of a-vacuum cleaning system com 40 hollow partition member surrounded'by the'said
prising: passing air through a portion of said wall
air-pervious wall to divide the ?lter chamber into
in one direction while simultaneously passing air
two compartments, means to connect said par
' through the remainder of said wall in the oppo
site direction, then simultaneously reversing the
?ow of air through the said- portion and the said‘
remainder of said wall.
tition member to said whirl'chamber for] main
taining a partial vacuum Iin'one compartment,
‘means to connect the other compartment to the
vpressure exhaust of said blower, and means op
2. The method of cleaning theporous flexible 7
wall of a continuously operating ?lter chamber
for moving said partition member relative to said
comprising: moving dirt-laden air through a part
of the wall sufficient in extent as to be ?exible
erable from the exterior of said ?lter chamber
'air-pervious wall.
~50 "
j
_
'
V
,
»
'
‘
v8. 111:2. vacuum cleaner of'the'type comprisingi
to de?ect it in one. direction and moving clean‘
"a whirl chamber, means for collecting debris at '
air through an adjacent vpart of the wall su?icient
the bottom of said whirl chamber, means for in
troducing dust-laden air tangentially into. said
in extent as to be ?exible to dislodge collected for
whirl Chamber to centrifugally deposit a portion
eign material and to de?ect it in the opposite
direction, and reversing the direction of air flow 55 of the dust therein, and a motor-operated blower
‘positioned to withdraw air from said whirl cham
through a portion of said wall to cause that por-:
ber; a ?lter chamber including end'walls vand'an
tion to reverse its direction of de?ection. ~
' 3. 'In a suction cleaner,.a porous ?lter, a ?lter
cleaning nozzle movable over said ?lter and
air-pervious wall therebetween, a hollow parti
tion member surrounded by the air-pervious wall
formed as an air passageway with spaced convex 60 to divide the ?lter chamber into two compart
lips de?ning a mouth at its end, one of said lips. ' _ merits, said partition member having aslot'around
being extended further toward'said'?lter‘than ‘its peripheral edge opening to its hollow interior
and to one of said compartments, means adapted
the other'lip, 'means mounting said nozzle for‘
movement along said ?lter,and suction-creating 65 to connect, the interior of said partition member
means to draw air through said nozzle.
‘4. In a suction cleaner, a cylindrical ?lter
to said whirl chamber'to return air from‘ said
one compartment to said ‘whirl chamber, and air
conducting means adapted to connect the ‘other
chamber having a porous side wall, a nozzle
compartment to said blower to receive air from
‘ jmovable longitudinally‘ of said chamber in con
said whirl chamber.
'
/ I
1 tact with said'?lter and having an external pe 70
9. .In a vacuum cleaner of the type comprising:
riphery'conforming to said chamber, said nozzle
‘ being formed with an'inlet around its periphery,
said inlet being formed by spaced'convex lips one .
a whirl chamber, means for collecting debris at
the bottom of said whirl chamber, means for in
troducing dust-laden air tangentially into- said
of Which extends outwardly beyond the other in
whirl chamber to centrifugallydeposit a portion
order to eiiect a bending in the ?lter surface When 75 vof the dust therein,’ and a motor-operated blower
2,404,358
5
positioned to withdraw air from said whirl cham
6
?rst-mentioned means, and manually operable
valve means cooperating with said afore-men
tioned means to reverse the ?ow of .air into said
air-pervious wall therebetween, a hollow ‘parti
separator at said one end and at the point spaced
tion member surrounded by the air-pervious wall
to divide the ?lter chamber into two compart (1 therefrom to dislodge adhering foreign material.
12. In a suction cleaner, a continuously oper
ments, said partition member having an open
ating dirt separator inclduding a ?exible air-per
slot around its peripheral edge, said partition
vious ?lter wall, means to deliver dirt-carrying air
member extending further toward said wall on
to one end of said separator, means to convey air
one side of said slot than on the other side there
from said separator at a point spaced from said
of said side of greatest extension forming the
?rst-mentioned means and including a ?lter
principal seal between said two compartments,
wall-contacting seal member movable therealong
and air-conducting means adapted to connect
dividing said separator into two parts and sep
the interior of said partition member to said
arating ‘the air at high pressure from the air at
whirl chamber, and air-conducting means to
ber; a ?lter chamber having end walls and an
connect'the compartment adjacent said principal
seal to said blower.
_
10. In a suction cleaner, a dirt separator in
cluding a ?exible air-pervious wall, a movable
partition member in said separator mounted for
movement along said wall and dividing said sep
arator into two compartments, said partition
member being formed as an air conduct and hav
ing a surface-contacting suction mouth in con
tact with said wall, said mouth being formed by
lips one of which extends further toward said wall
than the other lip, means to conduct dirt-carrying
air into the compartment formed by said parti
tion member located nearest the ?rst-mentioned
lip, and means to connect said partition mem
low pressure, the movement of said seal member
along said wall effecting a change in the area
and curvature of said wall exposed to said air
at high and low pressure and effecting the dis
lodgment of adhering dirt from said wall by the
?exure thereof.
13. The method of cleaning the porous ?exible
wall of a continuously operating ?lter chamber
comprising: forcing dirt-laden air under pressure
through a portion of said wall to deflect it in one
direction and drawing clean air through an ad
jacent portion of said wall of su?icient extent as
to be ?exible in order to de?ect it in the opposite
direction and quickly reversing the direction of
the ?ow of air through said ?rst-mentioned por
ber to a source of suction to draw air there 30 tion to de?ect it in the opposite direction to dis- ,
lodge adherent foreign material.
through and to create a reduced pressure in the
14. The method described in the preceding
claim characterized in that the reversal of the
direction of the ?ow of the air is simultaneously
ating dirt separator including a ?exible air-pervi
accompanied by a change in the total area of the
35
ous ?lter wall, means to deliver dirt-carrying air
porous wall through which air is drawn.
to one end of said separator, means to convey air
WALTER E. BIBLE.
from said separator at a point spaced from said
remaining compartment.
11. In a suction cleaner, a continuously oper
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