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Патент USA US2134396

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Oct. 25, 1938. '
E. CAMPBELL
VACUUM
’
CLEANER
I
Filed Sept. 25, 1935
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ATTORNEYS.
Oct.‘ 25, 1938.
E_._ CAMPBELL
2,134,396
VACUUM CLEANER
Filed Sept. 23, 1955
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INVENTOR.
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ATTORNEYS.
Patented Oct. 25, 1938
2,134,396
‘UNITED .STATES PATENT OFFICE
VACUUM CLEANER
Edward Campbell, Detroit, Mich., assignor cf
one-?fth .to Sherman '1'. Handy, Lansing,
Mich.
‘Application September 23, 1935, Serial No. 41,753
7 Claims.
' This invention relates to a vacuum cleaner and
it has to do especially with that type of vacuum
cleaner commonly used for household purposes
where each cleaning unit is equipped with its own
5 power drive, which usually takes the form of an}
electric motor.
-
_
The objects of the invention are to provide a
cleaner of simple rugged construction, but one
capable of an e?icient operation and one which
10 can be constructed along small lines, which may
be so arranged that the cleaner or part thereof
may be pushed under articles of furniture or the
like. Another object of the invention is the pro
vision of a vacuum cleaner which may have a
15 mouth or inlet opening of considerable width and
which is provided with an agency which may
extend throughout a substantial portion of‘ the
width of the opening for setting up and effecting
, movement of the air and particles carried there
by through the channel way in the cleaner to
Ward the dust-receiving receptacle. Other ob,
jects will appear as the detailed description pro
gresses in conjunction with the accompanying
drawings.
'
Fig.' 1 is a view of _a vacuum cleaner which
may be constructed in accordance with the in
end [2. The housing portion i0 is for the pur
pose of accommodating an electric motor l3.
The interior of the housing maybe provided
with thickened lug portions l5, and the motor
frame may have projecting lugs I 6 and the motor
may be held in position by cap screws [1 pass
ing through the lugs l6 and screw threaded into
the thickened portions l5.
A driven member is '
shown at l8. This member may be integral with
the motor shaft, and is preferably so arranged,
although it may .be a separate pin attached to
the motor shaft.
One end of the member- I8 is
.‘iournaled in the small portion I2 of the housing.
An example of such a journal is shown in Fig. 2
and may comprise a screw threaded bushing I9
to be screwed into the end of the housing and
length, a member in thenature of a screw or 25
worm 22. This member is of helical form with
a relatively thin wall, similar in nature to the
corresponding portion of an auger or drilling bit,
and this member preferably carries brush ele
ments 23. The peripheral edges of the screw are
onv line 3—3 of Fig. 2.
preferably arranged to contact with the carpet
_
'
-
Fig. 4 is a view which, in the main, is a top
plan view with parts cut away and parts shown
in section.
Fig. 5 is a vertical transverse section taken
substantially on line 5-5 of Fig. 2.
-
Fig. 6 is a vertical transverse section taken
substantially on'line 6—6 of Fig. 4. '
Fig. 7 is a detailedsectional view taken on
line 1-7 of Fig. 4.
'
Fig. 8 is a sectional view taken on line 8-—8
of Fig. 2.
.
The body of the vacuum cleaner is. generally
represented at I having a handle Zwhich may
be attached to the body by forked arms 3 pivot
ally mounted on projections 4 which may be fas
tened to or be integral with the body I. The
bodyv has an outlet member 5 to which a dust
receiving bag 6 may be attachedqin the usual
manner.
The body I, as shown in Fig. 2, may be a cast
ing, preferably of light metal such as aluminum
or an aluminum alloy; with a relatively large por
tion ID at one end and with a taperingportion
55 II which may taper down to a relatively small
15"
recessed to form a bearing 20 for the end of the
shaft. An antifrictionthrust bearing 2i may be.
provided to take the end thrust. The vopposite
end of the member may be journaled in the oppo 20
site end of the body member by means of a bush
ing l9a, as shown, and a thrust bearing 2 I a may
be used.
The member l8 carries for the. portion of its
Fig. 2 is a. vertical longitudinal section taken
through the body of the cleaner.
Fig. 3 is a sectional view taken substantially
vention.
50
(01. 15-8)
so
or rug to act as a beater, and the brush elements
are so located to brush the carpet or rug and are
located on the rear side of the helical ?n forma
tibn. Preferably, the screw member is integral 35
with the member l8.
.
-
The member l8 also carries one or more fan
elements. These elements are shown in Fig. 2
as being constituted by a fan member 25 having
a hub portion 26 fastened to the member. The 40
fan has a central disc-like partition 21 and fan
blades 28 on one side of the partition and fan
blades 29 on the other. This forms a multiple
fan.
.
The bottom of the housing I is open so that the 45
motor, member l8 and fan, all as a unit, may be
inserted into the body through the bottom, the
cap screws I‘! then being located and the end,
bearings l9 and Na positioned and adjusted.
The open mouth .of the body is shown at 30. 50
At the location of the screw the mouth may be
reduced to the proper and most e?'lcient width
by plates 34 secured'as‘ by means of screws to _
the body. The outlet spout 5 is in alignment
with the fans so that the fans force dust laden 55
2,184,896
2
. air centrifugally through the spout into the bag.
ments because the air is being drawn in through
The centrifugal fans are located in a sort of a opening 33 on one side of the housing and open
chamber 3| de?ned in part by ribs 32 and 33 on . ing 43 on the other, and the fan housing may be,
the interior of the housing, but the arrangement and preferably is, relatively narrow.
leaves an opening 34 connecting the fan chamber
A machine thus constructed may be quite light I
to the tapered part II of the housing and an’ so that it is easy to handle, is extremely low in
opening 35 leading into the opposite side of the over-all dimensions, and the tapered end may
fan chamber. The bottom of the body is closed easily be pushed underneath the furniture. Due
underneath the motor and fan by a plate 36 to the fact that multiple fans'are used there is
attached to the body by screws 31, as shown, and su?icient air drawn from opposite sides of the 10
this plate has upstanding ribs 38 and 35 which fan chamber; and the rotary screw, its brush or
cooperate with the ribs 32 and 33 in such a man
beater, agitates or loosens the dust particles. Due
'ner that the openings 34 and 35 are de?ned by to the fact that the motor drives the fans and‘
circular walls. The plate 35 also has a projec
brush elements directly, any power transmitting
15 tion 40 which cooperates with a partition mem
agency, such as a belt, gears or the like, is elim- l5
ber 4| and which substantially closes oil the
motor housing leaving a space 42 between the
motor housing and the fan housing. This space
42, as shown in Fig. 4, communicates with an
20 inlet opening 43 just forward of the motor hous
ing and which is constituted by' the bulged or
border portion 44 extending along the front of
the body I. The opening 43 in front of the motor
is preferably closed off from the channel formed
25 by the remaining part of the bulged portion 44
by a partition 45, and the opening 30 is prefer—
inated, thereby simplifying and cheapening the
ably closed off by a partition 45.
'
structure and minimizing the number of parts
which may need repair or replacement.
In the claims appended hereto the term "screw”
is used to describe the element in the tapered part 20
of the housing. This is used in the sense anal- ‘
ogous to the use of this word on screw propellers
and is intended to describe an element which has
longitudinal feeding action in the nature of a
screw auger or helically wound member.
It will be noted that the screw member con
_
The cleaner may advantageously be supported
by a three-point contact with the ?oor. At the
30 heavy end where the motor is located the body i
is formed with a chamber 50 in which is mounted
a carriage 5| having rollers 52 and 53 spaced
fore and aft of the machine. An offset bracket
54 may extend through the wall of the housing
and is adjustable by a screw threaded adjusting
nut 55. This adjustment servesv to raise and
lower the mouth of the cleaner with respect to
the underlvingsurface. The third support may
be constituted by a slide member 55 which may
40 be pivot-ally mounted as at 51 to a portion of one
of the projections 4 and which may be vertically
adiusted by a screwlthreaded nut 58. This three-'_
point suspension serves to hold the entire ma
chine elevated on the ?oor, as shown in Fig. 2.
45
It will be appreciated that after the motor,
fans and shaft have been located in the housing,
that the plate 36 is located, which closes in the
motor compartment, forms an enclosure under
neath the centrifugal fans, and with its parti
tion portions 33, 39 and 40 completes the interior
50 partitioning
effect in the housing.
-
25
stitutes a combined beater and brush, the periph
eral edges of the screw serving to beat the car
pet while at the same time the carpet is brushed.
This element serves an additional function, 30
namely, that of moving the air and/or the par
ticles of dust or dirt therein in an axial direction.
To this end there is an eilicient movement of
dust laden air through the body and to the fan.
35
I claim:
1. In a vacuum cleaner for floors, a hollow
body having an inlet opening in its bottom,
means for supporting the body with its bottom
substantially parallel to a ?oor, said hollow body
having a housing at one end, a driving motor in 40
the housing/a fan in the hollow body for setting
up air currents, and for creating a reduced pres—
sure at the inlet opening, an air propelling screw
member with a solid screw formation in the hol
low body having brush means on the periphery of 45
the screw formation projecting into the inlet
opening, said fan and screw being mounted ro
tatably on a common axis and driven by the mo
tor and said screw formation being arranged to
propel air toward the fan, said body having an on
outlet opening adjacent the fan and leading to a
In the operation of the machine the centrifu
galfan blades 25 draw air from under the ma
dust receiver.
chine through the tapered. part of the housing,
ber having a transverse hollow structure, a mo- »
55 and the air and particles carried thereby enter
_
2. In a vacuum cleaner for ?oors, a body mem
the fan chamber through the opening 34, and
body for settingv up air currents, said body having
are discharged through the spout 5 into the dust
bag. The brush 33 brushes the ?oor and agi
tates the floor covering after the fashion of a
60 sweeper. The direction of rotation is such that
the screw and brush carried thereby tends to
move the air and particles axially toward the
fan elements. This aids in preventing deposits of
dirt, dust or other particles: in this portion of the
65 machine and adds to the ei’ilciency of the move
ment of the dust laden air. The fan blades 28
draw air from underneath the machine through
the opening 43 into the space 42 through the
opening 35 and discharge the same centrifugally
70 through spout 5 into the dust bag. In this man—
ner suction action is obtained substantially
an inlet opening in its bottom and an outlet
opening adjacent the fan leading to a dust re-.
ceptacle, means for supporting the body with the
throughout the width of the machine, except for
that small portion immediately underlying the
fan housing. Even the surface underlying this
.
tor housed in one end of the body, a fan in the 55
inlet opening adjacent'the ?oor, an air propel- 6,0
ling screw member with solid thread formations’.
in the hollow body for propelling air toward the
inlet side of the fan and havng brush means
on the peripheral portions of the thread forma
tion projecting’into the inlet member, said fan 65v
and screw being mounted rotatably on the axis
‘of the motor and driven thereby.
3. In a vacuum cleaner for ?oors, a body mem
ber of hollow formation having. relatively‘ large
cross dimensions’ at one end and tapering to 70"
relatively small cross dimensions at the oppo
site end whereby the cleaner may be projected
under furniture or the like, means for support
ing the body member\adjacent a ?oor, a driv-_
portion of the machine is Subjected to air move-_ ing motor. housed in the large end of the mem- 75
2,184,896
3
ber, fan means adjacent the motor,'said body _ solid thread formations in the tapering housing
member having an inlet opening at the bottom and constituting a part of the driven member
of the tapering portion and substantially paral
leling the ?oor, an air propelling screw member
with solid thread formations in the tapering
portion of the body member for propelling air
toward the air inlet side of the fan and having
_ brush means on the peripheral portions which
projects into the inlet opening, the fan means
10 and screw member being mounted upon a'com-“
mon axis and driven by the motor. , i
4. In a vacuum cleaner foriioors, a body mem
beryéof hollow formation having relatively large
cros's dimensions at one end and tapering to
15 relatively small cross dimensions at ‘the opposite
end whereby the cleaner may be projected under
furniture, a driving motor housed in the large
end of the member, fan means adjacent the
motor, said body member having an inlet open
20 ing at the bottom of the tapering portion sub
stantially paralleling the floor, means for sup
porting the body member so that the inlet open
ing is adjacent the ?oor, an air propelling screw
25
member with ,solid thread formations in the ta
pering portion of the body member for propel
ling air toward the inlet side of the fan and hav
ing brushvmeans on the peripheral portions of
its thread formation which projects into the inlet
opening, the fan means and screw member being
and having brush means on the peripheral por
tions of its thread formation which projects into
the inlet opening, said screw member propelling
air toward the air inlet side of the fan, said body
member having an outlet adjacent the fan means
leading to a dust receiver.
6. In a vacuum cleaner for floors, a hollow
body member of tapering form, and adapted to 10v
have its smaller end projected under furniture,
a driving motor housed in the large end of the
body, fan means adjacent the motor and in the
relatively large portion of the body, said‘ body
member having an opening in its bottom de?ned
by walls substantially paralleling the floor, means
for supporting the body member with the open
ing adjacent the floor, means for closing the
opening underneath the motor and fan, a ta
pered air propelling screw member with solid 20
screw thread formations in the tapering part of
the housing for propelling air toward the fan
and having brush means ,on the peripheral por
tions of the screw formation projecting into the
inlet opening, said body having an outlet means 25
adjacent the fan means and extending to a _
dust receiver.
7.. In a vacuum cleaner for ?oors, a hollow
body member of tapering form, a motor housed
in the large-end of the body, said body having 30
an opening in its lower portion, means support
ing the body with the opening adjacent a floor,
form of the housing.
a fan adjacent the ‘motor and arranged to be
5. In a vacuum cleaner for floors, a hollow
body member having an opening in its bottom , 'driven thereby for creating a- reduced pressure
at ‘the opening, outlet means in the body for v35
35 substantially paralleling the floor, said body mem
ber having relatively large cross dimensions at the passage of dust-laden air from the ‘fan, and
one end and relatively small cross dimensions a screw member having screw formations of solid
at the opposite end and being of tapering form wall construction, said screw member being of
tapering form and extending substantially from
whereby the body member may be projected un
the fan to the smaller endof the body, said screw 40
der
furniture,
a
motor
driven
member
journaled
40
at opposite ends of the housing and on an axis member being operably connected to the motor
inclined relative to the horizontal, fan means to be rotated thereby and arranged to overlie said
on the driven member for setting up air currents opening and adapted to propel air axially of the
screw member and toward the fan.
and for creating reduced pressure at the open
EDWARD CAMPBELL. '
ing, a tapering air propelling screw member with
30 driven by the motor, ‘said screw member being
of tapering form corresponding to the tapering
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