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Патент USA US2112372

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March 29, 1938.
2,112,372
G. E. LOFGREN '
VACUUM CLEANER
2 Sheets-Sheet l
‘Filed June 25, 1956
32 v
i3
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_
1
vENTbR.
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March 29, 1938.
_ e. E. LQFGREN
2,112,372
VACUUM CLEANER
Filed June 25, 1956,
70.
6%
1N VENTOR.
M
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KA» Adi/9%
/ 1%‘; ATTORNEY.
I Patented Mar. 29, 1938
2,112,312 _
UNITED ‘STATES
PATE'NT OFFICE
2,112,872
VACUUM CLEANER
Gustaf Einar Loigren, Riverside, Com, assignor
to Electrolux Corporation, Dover, Del, a cor
poration of Delaware
Application June 25, 1936, Serial No. 87,125.
10 Claims.
(01. 183-37)
~ My invention relates to vacuum cleaners and
"
‘the device shown in Fig. 3, but showing certain
more particularly to vacuum cleaners of the en
closed bag type. In cleaners of this. type, it isv
parts in different positions; and
‘
Fig. 8 is a view similar to Fig. 4 but showing
‘common to provide a casing within which are certain parts in a diiferent position.
I disposed a motor-fan unit and a dust bag or
Referring more particularly to Figs. 1 and 2, 5
other dust separating member. In order to reference character Iii designates the main por
clean the dust bag of accumulated dirt, it is tion of a vacuum cleaner casing, preferably in
necessary to remove it. and hence a removable cluding a rounded upper stamping H and a sub
closure member is.provided for this purpose. V stantially ?at lower stamping‘l 2 which are joined
10 It is also convenient to arrange the closure-mem
together in air tight relationship along the seam
ber so that it clamps the vdust bag in place.
l3. If desired, this seam may be covered by' a
One of the objects of my invention is to provide ‘ rubber strip M. which serves as a bumper to
a new and improved means for removably secur
ing a closure member in place. In accordance
15 with my invention the closure member may be
removed by a simple natural movement of a
single handle member which movement ?rst re
leases the closure member from engagement with
the rest of the casing and thereafter removes
20 the closure member. My invention'further in
cludes an automatic operating toggle mechanism
which looks the closure member in engagement
with the casing upon movement of the single
handle member in the‘proper direction.
,
It is also convenient in a cleaner of this type
to attach a suction hose to the closure member.
Inasmuch as-the hose is used to pull the cleaner
over the surface on which it rests, this force
must be transmitted from the closure member, to
,/ prevent marring of furniture or the like with
which the device accidentally may come in con
tact. Lower stamping I2 is preferably formed
with‘runners i 5 and I6 for supporting the unit
on a surface.
’
‘
Casing I0 is reenforced and divided into three
compartments by meansof bulkheads I1 and Ill.
The space I 9 between these bulkheads may be 20
v termed a motor-fan compartment and access
thereto may be had by means of a removable
cover member 20 secured in‘ place in an opening
formed in the bottom stamping. Suspended be’
tween the bulkheads is a preferably cylindrical 25
case 2| within which is mounted the motor-fan
unit including an electric motor 22 and a centrif
ugal fan 23.
_,
-
The space My between bulkhead l8 and the
adjacent end of the casing may be’ termed a 30
filter compartment and encloses a suitable ?lter
30 the casing through’ the means employed to se
cure the former to the'latterh Hence, another
. object of my invention is to provide securing ~ element 25. This end of the casing is "provided
means so arranged that this force has no tend
ency to cause release of the closure member
35
from the casing.
'
'
>
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I
Further objects and advantages of my inven
tion will be apparent from the following descrip
tion- considered in connection withv the accom
panying drawings forming part of this speci?ca
40 tion, and of which»;
Fig. 1 is a side view,'partially in cross-section,
of’ a. preferred embodiment ‘of my invention;
‘ Flgl. 2is an end view. ofthe device ‘shown in
Fig.
45
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sure member 26. v Member. 26 is provided with an
exhaust opening 21 acrosswhich extends a plu
rality of vanes 28 for the purpose‘ of directing
air ?owing therethrough' in an upward direction. _
The space 29 between bulkheadv I‘! and the ad-'
jacent end 'of casing~ l0 may be’ termed a dust ‘
bag compartment. This end of the ‘casing is
provided-with a preferably, though not neces
,
sarily, ‘circular opening bounded by a ?anged
ring 30 which provides an outwardly facing seat
view of the portion of the device shown'in Fig. v 3| fora dust bag 'ring 32. Ring 32 is formed with
1 which embodies my invention, and is taken on an outwardly extending ?ange 33 which carries
the line 3-3 of Fig. 2;
g
" ,
v I n .
‘Fig. 3 is a cross-sectional view of an enlarged
"Fig. 4 is a cross-sectional view taken on the line
Fig. 5 is a cross-sectional view taken on the
"line I—5 ofFlg.4;
"
n
.x
a packing ring 34 of rubber or other suitable com
pressible material. . A dust bag 35 of cloth which
-is pervious with respect to air but impervious
with respect to dust has its open end secured to
ring 32.v
Fig. 6 is a .cross sectional view taken on the
lines H of Figs. 4 and 5;
55
with an opening su?‘lciently large topermit the
insertion and removal of the ?lter element, which
opening is normally closed by means of a clo- 35
'
‘
°Fig. '! is a cross-sectional view of a portion of
to
'
I, A closure member designated generally by "et
erence character 40 is adapted to close the ope‘..
ing formed by ring 30. The closure member in 56
2,112,879
2
cludes a substantially ?at central plate 4| ?anged
through and is discharged by the fan through
at its periphery so as to be complementary to ?lter element 25 and ?nally passes to_ the atmos
phere through exhaust opening 21.
?anged ring 36. Plate 4| is formed with an in
After the vacuum cleaner has been operated for
let'opening 42 which is adapted to receive and ‘
retain one end of a ?exible'hose 43. To .the some time, su?icient dust has accumulated within
other end of the hose may be connected a suction the dust bag 35 to require the cleaning thereof.
This is accomplished by removing closure member
nozzle 44 by means of a hollowrigid handle 45.
Preferably integral with plate 4| is a pair of
spaced members 46 between which is pivotally
mounted/a handle 41 by means of a pivoting pin
46, which may be done by grasping the part 49 of
handle 41 and rotating it in a counter-clock
48. Handle 41 includes a preferably curved hand
grasped portion 49 and a substantially circular
portion 56.
.
A double rack 5| ‘is slidably mounted on the
outer surface of plate 4| and preferably slides
on tracks 52 which are raised slightly above the
surface of the plate. These tracks may be ma
chined so as to provide a smooth sliding surface.
Rack 5| is retained against tracks 52 by means
oi headed pins 56 which extend through slots 51
formed in the arms 58 of the rack.
Rack 5| is provided with a pair-of ears 53 dis
posed on either side of circular portion 50 of the
handle and between portion 56 and members 46.
25 Ears 53 are provided with slots 54 which are en
wise direction to the position shown in Fig. 7. 10
This movement causes pin 55 attached to the
handle to move in an-arc generally upwardly.
Rack 5| is hence caused to slide upwardly in a
straight line along tracks 52, the pin and slot con
nection between the rack and the handle per 15
mitting arcuate movement of the handle to cause
straight line movement of the rack. This move
ment of the rack causes gear segments 60 to pivot
in opposite directions to the position shown in
Fig. 8. In this position the latch member 62 has 20
been pivoted out of recess 65 and out of engage
ment with the springs 66 contained therein. Con
sequently, the closure member is no longer se
cured to the rest of the casing and it may be
removed therefrom by movinghandle member
25
41 away from the casing. It will be seen that
gaged by a pin 55 rigidly secured to central por
this latter movement is a continuation of, and in
tion 56 and projecting from. both sides thereof.
Ann 56 are formed with gear teeth 59 which substantially the same direction as, the move
ment of the handle which releases the latch mem
engage similar gear teeth formed on gear seg- bers
62. Consequently, as far as the operator is 30
merits 66, which are pivotally secured to plate 4|
concerned,
both the releasing and removal of the
by means of headed pins 6|. Integral with gear
segments 60 are latch members 62. Ring 36 is cover member is effected by merely grasping the
formed with box-like recesses 65 on opposite sides , handle and pulling it in a direction away from the
of the ring and in alignment with the pivots 6| of _ cleaner.
The dust bag may now be removed from the 35
the cover member.
Retained within each recess
65 is a spring member 66 having the shape clearly
shown in Fig. 6. That is to say, spring member
66 is made of a ?at piece of spring material and
is formed so as to have a substantial ?at central
portion 61 and curved end portions 68. Further
- more, these spring-members are so formed that
the ?at central portion 61 is inclined slightly to
the plane of movement of the latches 62, as is
likewise clear from Fig. 6. Plate 4| is formed
1 with ?anges 69 adapted to receive the box-like
portions of ring 36 which form the recess 65, thus
assuring that the cover member is properly lo
cated with respect to the ring 36.
The outer surface of plate 4| is also provided
with a projecting arm 16 to which is pivotally
secured at ‘H one arm 12 of the toggle mechanism.
The'other arm 13 of this mechanism is pivotally
connected at 14 to a projection formed on central
portion 56 of the handle. A spring 15 surrounds
arms 12 and 13 and tends to lengthen the toggle.
A stamping ‘I6 is preferably secured to plate 4|
for the purpose of concealing the mechanism car
ried on the outer surface of the plate, and the
shape of stamping 16 is preferably such as to car
ry out and blend with the shape .of the main
part It of the vacuum cleaner casing. Stamping
compartment 29 and emptied. It, is~then re
placed in the compartment and. the cover mem
ber put back.
In order to engage the cover mem
ber with the rest of the casing, it is placed on the
ring 36 with the ?anges 66 embracing the box-like 40
structures 65. Thereafter, the handle 41 is
turned or rotated in a clock-wise direction. This
causes the rack to move downwardly and to ro
tate the gear segments 60 so as to project the
latches 62 into engagement with the spring 66 45
contained in the recesses 65. As will be seen
from Fig. 6, as the latch 62 moves toward the
right, as viewed in this ?gure, it deforms the
spring 66, by virtue of the inclination of the ?at .
portion 61 of the spring. The stress thus pro 50
duced in the springs tends to force the plate 4|
tightly against the packing 64 on the dust bag
ring which is disposed between-the plate and the
ring 30.
This results in the formation of anair 7
55
tight seal around the opening.
The toggle mechanism assures that the latch
member 62 will remain in engagement with the
springs66. In- the position shown in Fig. 3, the‘
spring 15 of the toggle tends to rotate the han
dle member in a clock-wise, direction,v thus tend 60
ing to force the latch member 62 further to the
16 may be secured to plate 4| by means of a screw
11 which engages arm 10 and by means of a
threaded ring 18 which may be screwed on to the
outer threaded end of inlet 42 so as to clamp a
right, as viewed in Fig. 6, against spring 66.
Likewise, when the handle is in the position
shown in Fig. '7, the spring 16 of the toggle mech
?ange 19 formed on the stamping.
The operation of the above described device is
clockwise direction, thus assuring that itwill re
main in ‘this position when it is picked up by
the operator and until the closure member is in
place and the operator intentionally exerts su?i
as follows:—
'
With the unit assembled as shown in Fig. 1 ro
tation of the fan 23 by the motor 22 causes air to
be drawn in through nozzle 44, handle 45, hose 43
and inlet 42 to the interior of dust bag 35. As
the nozzle is passed over a dusty surface dust is
_
' entrained in this
air.
This dust is deposited
5 within the dust bag, while the air passes there
anism tends to rotate the handle in a counter
cient force on the handle to overcome the resist
ance of the spring 15. i
65
70
When removing the closure member 4011515 Y
not necessary to detach the hose 43 therefrom,
inasmuch as the presence of the hose has no
effect whatsoever. upon the releasing or attach 75
air'aa'ra
‘ ing voi’ the closure member. .When' in .use, the
3.
vacuum cleaner, a member pivotally mounted on .
vacuum cleaner unit is moved over the surface on said closure member and rotatable to‘ engage said
which it is supported by the operator pulling on - " casing, the plane of rotation of the pivoted mem
the hose 43. The force resulting therefrom is ber being substantially normal to the direction
transmitted to the closure member and from of the force applied by said hose,’ whereby force
there to the casing through the latching'llmech
for moving thev vacuum cleaner is transmitted to
anism.‘ It is important that this ‘force,’ which the casing fromthe closure member, and a han
is applied in a direction tending to open the seal ‘ dle movably secured to said closure-member and
formed by packing 34, shall not have .this eiiect. movable in substantially the same direction as the
10 Leakageat this point would result in a substan
direction of said force to rotate said pivoted
tial reduction in the emciency of the'vacuum member out of engagement with said casing. ‘
cleaner. It will be notedthat the direction of
4. In a vacuum cleaner of the kind having a
this force is at right angles to the plane in which unit pulled on the rug by a hose and including
the latch members 62 are,rotated to release them.
15 Consequently, this force has no tendency what
soever to turn the latch members, and hence does
not tend to loosen or release the closure member
- from the casing.
It will be noted that the engagement between
20
the latch .members 62 carried by the closure
member 40 and the spring 66 takes place within
. the casing proper, inasmuch as these springs are
‘retained within'recess formed in ring 30 which is
10
a- casing having a dust separator opening, a dust
separator ring seating in said opening, a cover,
means for compressing the dust separator‘ ring I
between the cover and the casing, a handle on
said cover mounted to move toward and. away
from said dust separator opening, and means
connecting said handle with said compressing 20
means to compress the dust separator ring when
the handle is moved toward the dust separator
opening and to release the, compressing means
part of ‘the casing. This adds greatly to the _ on moving the handle away from the dust sep
arator opening.
25
appearance oi’ the vacuum cleaner inasmuch as
all fastening mechanism is within the casing and
‘hence out of sight. . Although the present inven
tion has been described in connection with the
5'. In a vacuum cleaner of the kind having a
unit pulled on the rug by a hose and including
a.casing having ,a dust separator opening, a
' closure for the dust bag opening, it could be used
30 as well for securing the member 26 to the main " dust separator ring seatingv in said opening, a
cover, means for compressing the dust separator
portion ill of the casing.
While I have shown and described one more or
less speci?c embodiment of my invention, this
ring between the cover and the casing, said cover
having'a hose receiving aperture, a hose adapted
to communicate with the interior of said casing
' has been done for purposes of illustration only
35 as required by the patent statutes, and does not \ ’ through said aperture, a handle on said cover
mounted to move toward and away from said
constitute a limitation vof‘ my invention, the scope
of which is-to be determined by the appended
claims viewed in the light oi’ the prior art. ~
, What I claim is:—
40
‘
1. In a vacuum cleaner, a casing formed with
an opening, a closure member for said opening,
a member connected to said closure member for
exerting a force thereon to move said vacuum
‘cleaner, means movably mounted on said closure
45 member‘and movable to engage said casing to se
cure said closure member to said casing and being
dust separator opening, and means connecting
said handle with said compressing means to
compress the dust separator ring when the han
dle is moved toward the, dust separator opening
and to release the ‘compressing means on movingv 40
the handle away from the dust separator open
ing, said compressing means also serving to
transmit pull between the hose and the casing.
6. In a vacuum cleaner of the kind having a
unit pulled on a rug by a hose and including a 45
casing having a dust bag opening, a dust bag ring
constructed and arranged for transmitting force ‘ seating in said opening, a cover having an air
from the closure member to the casing for mov
ing the vacuum cleaner, the plane of movement
50 of said means being substantially at right vangles
to the direction of application of said force, and
a handle mounted ‘on said closure member for‘
.
I
an opening,_a closure memberior said opening
provided with an air'passage, a ?exible hose
adapted to be connected to said-member so as to
communicate with said passage and adapted to
exert a force‘ on said member 'forvmoving said
60 vacuum cleaner, a member pivotally mounted on
said closure member and rotatable to engage said
casing toremovably secure said closure member
to said casing, the plane of rotation of the -piv-'
otal member being substantially normal to the
65 direction of the force applied by said hose, where
by force for moving the vacuum cleaner is trans
mitted to the casing from the closure member,
and a handle mounted on said closure member
'70
horizontally to and, from said opening, means
for securing said cover to said casing and for
compressing the dust bag ringfbetween the cover _
and the casing, a handle on said cover pivoted
2. In a vacuum cleaner, a casing formed with?-i... .on a horizontal axis-‘and mechanism connecting
moving said means.
55
passage and adapted to have a hose connected
thereto, said cover being movable substantially
for rotating said means.
i
.'
.
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' 3 In avacuum cleaner, a casing formed with
said handle with said securing and compressing
means to release said means on movement of the
handle away from the cover, whereby a conti~v
nuity of movement in the same general direction
releases the cover and removes it from the cas
ing.
‘
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60
.
7. In a vacuum cleaner oi’ the kind having a
unit pulled on a rug by a hoseand including a
casing having a generally vertical dust bag open- _
ing, a dust bag ring seating in said opening, ‘
a cover having a horizontal air passage, a hose
connectible to said air passage, and means for
sealing the dust bag ring betweenv the cover
and the casing, a handle on said cover pivoted
on a horizontal axis, and mechanism connecting
the handle and the sealing means to cause seal
an- opening, a closure member for said opening ing on‘movement oi’ the handle toward the cover
provided with an air passage, va ?exible hoses as a continuing movement after bringing the
- adapted to be connected to said member so as to \
communicate with said ‘passage and adapted’
we to exert a force on said member for/moving said <~
cover into position.
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_
i
8. In ‘a vacuum ‘cleaner of the kind having a
unit pulled on the ?oor by a hose and including
2,112,879
4
a' casing having a dust bag opening, a dust bag
having a rubber ring seating in said opening and
a cover seating against said dust bag ring, means
adapted to exert a pull on said cover, pull trans
mitting and ring compressing ?ngers movably
mounted on said cover, said casing having re
ceiving means for said?ngers, a handle mounted
on said cover, and mechanism connecting said
handle and ?ngers.
‘
9. In a vacuum cleaner, a body including a
10
ring bounding a dust bag opening, said ring
having a seat for a dust bag in a given plane,
said ring having projections extending from said
plane with respect to the body providing recesses,
a cover having ?ngers adapted to enter said re
cesses, a dust bag ring ?tting said seat, said cov
er having an annular surface for contacting the
dust bag ring, said ?ngers being pivoted adja
cent said annular surface, a hose for pulling the
body, means to connect the hose to the cover,
snap-action mechanism for moving said ?ngers
into and out of said‘ recesses, and said cover pro—
viding supporting surfaces for said ?ngers to
transmit force between the hose and the body.
10. In a vacuum cleaner of the‘ kind having a
unit pulled on the rug by a hose and including
a casing having an access opening for removal
of dust, a sealing ring seating in said opening,
a cover, means for compressing the sealing ring 11)
between the cover and the casing, a handle on
said cover mounted to move toward and away
from said opening, and means connecting said
handle with said compressing means to compress
the sealing ring when the handle is moved to
ward the opening and to release the compressing
means on moving the handle away from the
opening.
'
GUSTAF EINAR LOFGREN.
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