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Патент USA US3071809

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Jan. 8, 1963‘
I. JEPSON_ ETAL
3,071,799
CLEANING ATTACHMENT
Filed July 11, 1960
4 Sheets-Sheet 1
V
.
INVENTORS:
Jan. 8, 1963
I. JEPSON ETAL
3,071,799
CLEANING ATTACHMENT
Filed July 11, 1960
4 Sheets-Sheet 2
Jan. 8, 1963
l. JEPSON ETAL
3,071,799
CLEANING ATTACHMENT
Filed. July 11, 1960
4 Sheets-Sheet 3
Jan. \8, 1963)
3,071,799
I. JEPSON ETAL
CLEANING ATTACHMENT
Filed July 11, 1960
4 Sheets-Sheet 4
@
1/’ I
I
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wtzzam
MEM _@/
“ilnited States Patent
3,371,799
Patented Jan. 8, 1968
1
2
3,071,799
.
Ivar Jepson, ()ak Park, Alfred F. Ernstberger, Broadview,
CLEANING ATTACHMENT
and Gilbert R. Wolter, Elmhurst, 11]., assignors to Sun
Hence, such a turbine brush should be designed so that
it may operate satisfactorily with a minimum air flow,
even though manufacturers of vacuum cleaners are now
beginning to produce cleaners having a relatively high
air flow. Preferably also, such an attachment should have
a. simple control for terminating operation of the turbine
rush without terminating the suction applied to the at
tachment. Furthermore, such an attachment should also
have a simple height adjustment for use with a wide
The present invention relates to a cleaning attachment 10 variety of rugs. Obviously, the cleaning problem on a
for a vacuum cleaner, and more particularly to what has
deep pile rug is not the same as with rugs having a very
beam Corporation, Chicago, 111., a corporation of Ill]
nois
Filed July 11, 1960, Ser. No‘. 42,930
10 Claims. (Cl. 15—354)
come to be referred to as a turbine brush attachment.
Vacuum cleaners used particularly in homes are of
two general types. One of these types commonly referred
to as an upright cleaner comprises a housing having
mounted therein a motor driven fan and also a rotatable
brush driven by the motor. The housing itself terminates
in a suction nozzle wherein the brush is usually mounted.
The other type of cleaner commonly referred to as a tank
or canister type cleaner gets its name from its construc
short pile.
Accordingly, it is an object of the present invention to
provide a new and improved cleaning attachment having
the above-mentioned desirable features.
It is another object of the present invention to provide
an improved air operated cleaning attachment particularly
adapted for tank or canister type vacuum cleaners which
is of sturdy construction, economical to manufacture,
and which will give long years of foolproof service.
Still another object of the present invention resides in
tion. It generally comprises a tank or similarly shaped
unit containing a motor driven fan for producing the
a cleaning attachment employing a power driven brush
necessary suction. Connected to this unit through a flex
having an improved air turbine which will not be damaged
ible hose are the various cleaning attachments.
or jammed by solid objects passing therethrough during a
The present invention is concerned with a cleaning tool 25 cleaning operation.
primarily directed to cleaning rugs and ?oors. It is
it is a further object of the present invention to pro~
generally agreed that the best cleaning job on rugs is per
vide an improved power driven cleaning attachment with
formed by cleaners having a power driven brush whereby
improved means for effectively stopping the brush without
the cleaning action of the brush and the suction produced
terminating the suction from the associated vacuum
by the vacuum cleaner together produce the highly satis
cleaner.
factory cleaning operation. It is also generally agreed
It is another object of the present invention to provide
that the tank or canister type cleaner is the most satis
an improved air turbine brush with simple means for vary
factory for all cleaning operations except the cleaning
of rugs, it being less satisfactory than the upright cleaner
for rug cleaning only because of its lack of a power driven
brush. It is, therefore, desirable that an attachment be
deviced for use with a tank or canister type cleaner which
includes a power driven brush. Numerous devices have
been suggested along this line. Among them has been an
attachment having its own self-contained electric motor.
The di?iculty with such an arrangement is with respect
to supplying electric energy to the motor in the attach
ment, necessitating either a separate power cord to the
attachment or some sort of electrical connection from
the attachment to the tank or canister type cleaner. It
has also been suggested to utilize the air ?ow produced
by the tank or canister type cleaner to operate a sort
of air turbine drivingly connected to a rotatable brush.
The present invention is particularly concerned with this
latter type of device. The turbine brush attachments
which have been available prior to the present invention
have not been satisfactory in numerous respects.
It will be appreciated that cleaning attachments for
vacuum cleaners will be required to pick up numerous
solid objects such as bobby pins, coins and other relatively
heavy metal objects. Where the cleaning attachment is
merely a nozzle of some sort with no movable parts, no
problem arises. However, in the case of a turbine brush
ing the operation thereof in dependence upon the type of
rug being cleaned.
Further objects and advantages of the present inven
tion will become apparent as the following description
proceeds, and the features of novelty which characterize
the invention will be pointed out with particularity in the
claims annexed to and forming a part of this speci?cation.
For a better understanding of the present invention,
reiergnee may be had to the accompanying drawings in
w.1c :
FIG. 1 is a perspective view of a cleaning attachment
embodying the present invention with the swivel in the
position of maximum air flow through the cleaning at
tachment;
FIG. 2Vis an enlarged sectional view taken on line
2——2 of PEG. 1;
PEG. 3 is an enlarged sectional view taken on line
3'—3 of FIG. 1;
away more clearly to illustrate certain features thereof;
FIG. 5 is a sectional view taken on line ‘5—-5 of FIG.
3, assuming that FIG. 3 shows the complete structure but
with the swivel shown in the position for terminating
brush operation without cutting off the suction;
FIG. 6 is a fragmentary sectional view taken on line
6-—6 of FIG. 5, also assuming that FIG. 5 shows the com
type cleaning attachment, it will be appreciated that, to
be satisfactory, this attachment must be capable of pick
ing up solid metal objects such as coins Without damaging
or jamming the air turbine driving the brush. Therefore,
plete structure;
it is desirable to provide a turbine brush which will sat
plete structure;
isfactorily pick up such solid objects without damage
thereto or jamming.
_
~
In addition to being able to handle such solid objects
satisfactorily and without damage thereto, a turbine brush
attachment must be built economically so that it can be
sold to the trade at a reasonable price. Another di?iculty
with prior art turbine brushes has been the fact that the
air flow for driving the’ turbine was not su?‘icient to give
the necessary power for a satisfactorybrushing action.
'
P16. 4 is an enlarged bottom view of the rug cleaning
attachment of FIG. 1 with certain portions thereof cut
PEG. 7his an enlarged sectional view taken on line ’7—7
of FIG. 3, again assuming that FIG. 3 shows the com
FIG. 8 is a greatly enlarged fragmentary sectional view
taken on line 3-8 of FIG. 5;
v
FIG. 9 is an enlarged fragmentary view of a portion of
FIG. 8, and
FIG. 10 is an enlarged fragmentary sectional view taken
on line 1€l——lti of FIG. 4.
'
Brie?y, the present invention is concerned with a clean
ing attachment comprising a housing unit de?ning a noz
zle with a rotatable brush mounted therein, and a turbine
3,071,799
chamber through which air passes, containing an air
So that the cleaning attachment 10 will not mar furni
turbine rotatably driven by the air passing through the
turbine chamber. The turbine is drivingly connected by
ture or walls of the room where it is used, the nozzle
suitable means with the brush mounted in the nozzle
chamber. A swivel type connection to the housing per
mits connection with a source of air suction, and this
swivel connection is designed so that upon pivotal move
ment thereof the suction may be varied su?iciently to
terminate operation of the brush, even though the cleaner
connected to the attachment continues to operate.
Referring now to the drawings, there is illustrated a
cleaning attachment or rug cleaning tool, generally de
signated by the reference numeral 10, which will be
referred to hereinafter as a turbine brush.
Cleaning at
portion 12, preferably is provided with a projecting ?ange
12a disposed slightly above the bottom opening de?ned
therein, which ?ange surrounds the entire periphery of the
nozzle portion 12 except the rear thereof where the por
tion 13 which de?nes the brush chamber 14 is integrally
secured thereto. A suitable resilient bumper 30 of U
shaped cross section, as best shown in FIGS. 2, 3 and 10,
is provided, which encloses the ?ange 12a and has the ends
thereof adjacent the point where the nozzle portion 12
joins the portion 13 secured thereto by suitable rivets or
other means (not shown).
To produce a brushing action with respect to the sur
tachment 10 comprises a base 11, preferably formed as 15 face being cleaned, there is provided within the nozzle
chamber 16 a rotatable brush generally designated by
an integral casting, having a forward somewhat elongated
the reference numeral 32. As best shown in the draw
nozzle portion 12 and a rearwardly extending some
ings, the brush 32 comprises a central cylindrical sup
what elongated bowl-shaped portion 13 de?ning therein
porting member 32a to which are secured tufts of bristles
a brush drive chamber 14, best shown in FIG. 3 of the
designated at 33, preferably in a spiral arrangement as
drawings. The longitudinal axes of portions 12 and 13
best shown in FIG. 4 of the drawings. A toothed pulley
are generally perpendicularly disposed. The nozzle por
member 34 is secured to the support 3211 at an intermedi
tion 12 of the base 11 is essentially an elongated hous
ate point therealong. As best shown in FIG. 4 of the
ing open at the bottom to de?ne a nozzle chamber 16
drawings, this pulley member is not disposed at the cen
therein. The bottom opening of the nozzle chamber, as
is well understood by those well skilled in the art, is in 25 ter of the support 32a but actually to one side of the
center thereof and directly in line with the notch 19 in
tended to be in engagement with a surface to be cleaned,
the wall 18. For the purpose of rotatably mounting the
such as a rug, so that the suction produced by an as
brush 32, the ends of member 32a are each provided
sociated vacuum cleaner can be applied to the nozzle
with a projecting pin 36. In a device built in accordance
chamber 16 with the result that dirt contained in the sur
face being cleaned will enter the bottom opening of the 30 with the present invention, the brush support 32a was
formed of wood, and the pins 36 were metal pins driven
nozzle portion 12. As illustrated in the drawings, the noz
into the ends thereof on the longitudinal axis of support
zle chamber at the junction with the brush drive chamber
32a. As best shown in FIGS. 4 and 10 of the drawings,
is de?ned by a curved will 18 (FIGS. 3 and 4). This
the ends of the support 32a surrounding the pins 36 are
curved or arcuate wall is provided with a slit or opening 19
recessed slightly as indicated at 38.
de?ned from the top to the bottom thereof through which
In order rotatably to support the brush 32, there are
a driving connection may be made between driving means
provided a pair of bearing members or blocks 40 which
disposed in the brush drive chamber 14 and a rotatable
are preferably molded nylon blocks each having a bearing
brush disposed in the nozzle chamber 16. As best shown
recess 41 de?ned therein for rotatably supporting the asso
in FIG. 3 of the drawings, the wall 18 is substantially
ciated pin 36 therein. To provide the desired resilience,
thicker at the bottom than at the top thereof, thereby
de?ning a sort of curved surface in the nozzle chamber.
For the purpose of supporting the cleaning attachment
10 from a surface to be cleaned, there are provided two
pairs of wheels, a forward pair generally designated at 21
and a rear pair generally designated at 22, both of which
are disposed to the rear of the nozzle portion 12. Pref
these blocks may be molded with additional recesses 42
(FIGS. 2 and 10) surrounding bearing de?ning recess 41
but opening on the side of bearing block 40 opposite that
on which recess 41 opens. The blocks 40 further include
a circular projection 40a surrounding the entrance to re
erably, the wheels or rollers 21 and 22 are of molded
cess 41, which projection extends into the recess 38 de?ned
in the end of the support 32a. In order to prevent hair,
plastic material. As best shown in FIG. 4 of the draw
ings, the front wheels or rollers 21 are each rotatably
for brush 32, there is provided for each end of this rotat
mounted on a rivet 23 suitably secured one to either side
able brush a brush shield 43 which is illustrated as a
of portion 13 of the base 11 de?ning the brush drive
chamber 14. The rollers 22 are preferably supported for
shallow dishlike member having a central opening for
projection 40a whereby each shield 43 is press ?tted to the
associated bearing block 40. The peripheral ?ange 43a
of each shield then overlies the end of support 32a, as best
shown in FIGS. 4 and 10 of the drawings. This arrange
ment prevents foreign matter from getting into the
rotation about a shaft 25 suitably mounted to the rear
of the base 11 in a manner described in detail herein
after.
The wheels or rollers 21 are spaced farther apart than
the wheels or rollers 22. As illustrated in the draw
ings, the portion 13 of base 11 includes a relatively nar
row depending portion 13a (FIGS. 2, 4 and 7) and the
string, thread, ?ber and the like from entering the bearing
bearings.
For the purpose of supporting the bearing blocks 40
within the nozzle chamber 16, there are provided integral
wheels 22 are spaced by the width of this narrow por
tion while the wheels 21 are spaced by the width of
the wider portion 13. In order to provide ready access
to the brush drive chamber to replace a driving element
or the like, the bottom of the portion of the base 11 de
projections 1212, as best shown in FIGS. 2 and 10 of the
drawings, one ‘at each end of the nozzle chamber 16.
The lower ends of the projections 12b are each provided
with a ‘bearing block receiving recess 44. Preferably, a
narrow portion 13a, is provided with an opening 26
(FIGS. 3 and 4) which is preferably closed by a suitable
closure member 27. As illustrated, the closure member
to bias the bearing block against the opposite wall of the
spring bearing block retainer 45 is disposed in each of
?ning the brush drive chamber 14, and speci?cally the 65 these recesses, which retainer has a resilient arm tending
recess.
In an embodiment built in accordance with the
present invention, ‘the retainer 45 included means for
27 is bifurcated at one end as indicated at 27a to receive
retaining it in recess 44- once it is inserted therein. This
between the bifurcations thereof the edge of the wall de
?ning the opening 26. The other end of the closure
means comprised sharp projections on the end of the
member 27 is supported by a single fastening member such
as the screw 29.
With this arrangement it will be ap
preciated that the single screw 29 at one end of the closure
member 27 holds it securely in position.
‘arm of retainer 45 seated deepest Within the recess 44.
It will be appreciated that, with use, the bristles 33
of the brush 32 will tend to wear, and in accordance
with the present invention the bearing blocks 40 are not
symmetrcal with respect to the bearing de?ning recesses
3,071,799
5
41 therein. Instead, as best shown in FIGS. ‘2 and 10 of
the drawings, the rcesses 41 are effectively 01f center.
It will be apparent that when the bearing blocks are in
the position shown in FIGS. 2 and 10 of the drawings, the
brush 32 is in its most retracted position relative to the
bottom opening in the nozzle portion 12, whereas if the
6
lowered. When the shaft is disposed in the deeper rear
notches 56, the rear of the base is lowered which means
nozzle portion 12 is raised.
For the purpose of selectively holding the shaft 25 in
one or the other of the pairs of recesses 55 or 56, there
is provided a leaf ‘spring 58 which is secured as by fas
blocks were reversed, in effect so as to be rotated through
tening means 59" within the recess 53. This leaf spring
180°, the axis of rotation of the brush would be in a
58 overlies the recesses 55 and 56, and is provided in
lower position as viewed in FIG. 2 of the drawings. Thus,
this area where it overlies the shaft 25 with side flanges
upon su?icient wear of the bristles, the bearing blocks 10 58a and an end ?ange 58b (FIGS. 3 and 7). ‘In accord
may merely be removed, rotated through 180° and rein
ance with the present invention, the side flanges are
serted, with the result that the changed brush position
adapted to be received within annular notches 61 and 62
will automatically adjust for bristle wear. Preferably,
de?ned in the shaft 25. Thus, the :annular notches re
the ends of the bearing blocks 40 ‘are provided with the
ceiving the ?anges 58a guide the shaft in its movement
word “Worn” on one end thereof and the word “New”
from one recess to the other when selectively adjusting
the height. Preferably, the bottom of the leaf spring 53
at the other end thereof. These blocks will be initially
may be provided with suitable indicia such as “Normal”
inserted so that the word “New” is visible from the bot
or “High,” the indicia “Normal” being disposed adjacent
tom, and after predetermined wear are rotated through
180° ‘and reinserted so that the word “Worn” will be ex
the front shallower recesses 55 ‘and the indicia “High”
posed when viewed from the bottom. With this arrange 20 being disposed adjacent the rear deeper recesses 56, thus
indicating that when the shaft 25 is in the recesses 56 the
ment it wll be apparent that provision for wear of the
forward end of the nozzle is raised somewhat by virtue
brush has been made in a very simple manner. In FIGS.
of pivotal motion about the axis of front wheels 21,
2 and 10 of the drawings the bearing blocks 40 are shown
whereas when the shaft 25 is in the recesses 55 the nozzle
in what would be termed the ”New” position.
To maintain the bearing blocks 40 in the position 25 is lowered. With this arrangement the attachment 10
can be used satisfactorily for deep pile or short pile rugs,
shown in FIG. 2 of the drawings and at the same time
as the case may be.
to provide a smooth rug or other surface engaging por
In order to complete the nozzle chamber 16 and the
tion surrounding the opening to the nozzle chamber 16,
brush drive chamber 14, there is provided a nozzle plate
there is provided a bottom plate 47 which has a plurality
of spaced hook-shaped portions 47a for engaging projec 30 65 which conforms in shape to the open top of portion 13
of base 11. This plate 65 is adapted to be secured to the
tions 12c de?ned on the nozzle portion 12 thereby inter
base 11 by suitable fastening means 66 disposed at the
locking one edge of the bottom plate 47 to the nozzle
front thereof and suitable rear fastening means 67 (FIGS.
portion 12. The other edge is then held to the nozzle
3, 4 and 6). The nozzle plate has an arcuate depending
portion by suitable fastening means 48. Preferably, the
edges of the bottom plate 47 are turned up so as to pro» 35 portion 65a which inter?ts with the wall 19, as best shown
in FIG. 3 of the drawings, to complete the nozzle cham
vide a smooth rug engaging surface which will not hook
ber. Preferably, it includes a depending projection 65b
on ‘any ?bers or the like. The bottom plate 47 prefera
receivable within the notch or opening 19. The re
bly includes a narrow central strip 47b which overlies the
mainder of plate 65 de?nes a top closure plate for the
toothed pulley 34 whereby it will serve as a pulley guard.
By virtue of this center strip 47b the bottom plate effec 40 brush drive chamber 14 and the bottom of an air turbine
chamber described hereinafter. The rear portion of the
tively comprises two spaced openings designated as 50,
nozzle plate 65 is provided with an integral depending
one of which is partially shown in FIG. 4 of the draw
chamber de?ning portion 650 de?ning therein a suction re
ings. The edges of these openings are also de?ned by
cess chamber 70 and a semicylindrical swivel chamber 71.
turned up portions such as 470 (FIGS. 2, 3 and 10) of
the bottom plate 47 thereby de?ning a smooth rug en 45 An opening 72 interconnects chambers 70 and 71 and an
opening 73 in plate 65 interconnects chamber 70‘ with the
gaging surface.
turbine chamber above plate 65. A swivel tube 75 is pro
As mentioned above, the bottom plate also raids in re
vided terminating in a cylindrical swivel portion 75a par
taining the bearing blocks in the position shown in the
tially receivable within the semicylindrical swivel cham
drawings. To this end there are secured to the bottom
plate 47 bearing block retainers 51, best shown in FIGS. 50 ber 71. As best shown in FIG. 7 of the drawings, suitable
pins 76 hold the swivel tube 75 in position. The cylindri
2, 4 and 10 of the drawings. The bearing block retainers
cal portion 75a of the swivel tube 75 is provided with an
51 are preferably of U-shaped con?guration, with the
opening 77 cooperating with the opening 72. With the
ends of the legs of the U riveted or otherwise secured as
swivel tube 75 in the position shown in FIG. 3 of the draw
indicated at 52 to the bottom plate 47. A springlike pro
jection 51a, projecting from the bight of each of the 55 ings, the openings 72 and 77 are in alignment. The swivel
tube 75 may be moved to the position shown in FIGS. 5
tel-shaped supports 51, engages the associated bearing
and 6 wherein the opening 77 is shown as not being in
block 40 and maintains it in position.
alignment with opening 72 and actually providing a by
In order that a rug cleaning attachment may be used
pass which would reduce the suction in the nozzle cham
satisfactorily with different types of rugs, it is generally
ber 16 to such an extent as to terminate the operation of
desirable to provide an adjustment for the nozzle effec
brush 32.
tively raising or lowering the same. To this end a novel
To provide a satisfactory seal between the cylindrical
arrangement of the support means for shaft 25 for the
swivel portion 75a of swivel tube 75 and the semi
rear wheels 22 is provided. As best shown in FIGS. 3, 4,
cylindrical recess 71, a suitable swivel pad 80‘ may be pro
6 and 7 of the drawings, the narrow depending portion
13a of base 11 is provided with a downwardly opening 65 vided, preferably formed of a foam rubber or the like, se
cured to the nozzle plate 65. Preferably, the surface of
recess 53. The lower edges of opposite walls de?ning this
the swivel pad 85 engaging the movable cylindrical swivel
recess 53- are each provided with spaced downwardly
portion 75a is covered with a layer of a smooth plastic
opening notches 55 and 56. As illustrated, the rear
whereby a satisfactory seal between movable parts in
notches 56 are somewhat deeper than the front notches
55 (FIGS. 5 and 6). The shaft 25 is adapted to be dis 70 suring a minimum loss of suction is provided.
In accordance with the present invention, the nozzle
posed either in the notches 55 or the notches 56. When
plate 65 has integrally formed therewith a cylindrical
the shaft 25 is in the front recesses 55, as best illustrated
bearing support 65d which projects both above and below
in FIG. 3 of the drawings, the rear of the base 11 is
the nozzle plate 65. For increased rigidity, a plurality.
raised with reference to the axis of front wheels 21 and
the nozzle portion 12 disposed forwardly of this axis is 75 of integral ribs such as 65e, 65]‘ and 65g (FIGS. 3 and 4)
3,071,799
8
7
such coins, a substantial clearance is provided below and
around the periphery of the turbine, as clearly shown in
FIG. 3 of the drawings. Moreover, the discharge opening
depending from the plate 65 insure a ?xed relationship be
tween the tubular bearing support 65d and the plate 65
integrally formed therewith. As illustrated, the rib 656
extends between the cylindrical bearing support 65a’ and
'73 from the turbine chamber 95 is so located that coins
and other solid objects will pass therethrough after com
pleting less than one half revolution in the turbine cham
ber.
one ‘wall of the depending chamber de?ning portion 650,
while the ribs 65]’ and 65g extend between the bearing
retainer 65d and the arcuate wall 65a.
Mounted within the bearing support 65d are an upper
Speci?cally, the one-piece molded nylon air turbine 92
comprises a central disk portion 92b from which the plu
tainer 82 and fastening means 83, and a lower bearing 10 rality of curved blades 92a project. As best shown in
FIGS. 8 and 9 of the drawings, the blades 92a which
85 suitably secured within the lower end of bearing sup
are disposed in the plane of disk portion 92b are of
port 65d. Journalled within the bearings 81 and 85 is
curved con?guration so that the air entering the turbine
an air turbine shaft 87 which has an upper portion 87a
chamber through opening 100 engages the concave sur
extending out of the upper end of the bearing support 65d
and a lower portion 87b extending beyond the lower end ~ face of the blades. An important feature of the present
invention is the fact that each of the blades at the edges
of bearing support 65a‘. A suitable toothed pulley 88
thereof is provided with an upper ?at surface 103 and a
is secured to the portion 87b and is drivingly connected
lower ?at surface 104 (FIG. 9). Molding an air turbine
by a belt 90 with the toothed pulley 34 on the brush 32.
92 out of nylon in a one-piece construction is not a simple
This belt 90 extends through the notch 19 de?ned in the
operation, and prior to the present invention the turbine
areuate Wall 18. Since the axis of toothed pulley 88 is
blades for such air turbines were molded separately and
generally vertically disposed, and the axis of the pulley
then cemented in place. However, such multi-piece con
34 is generally horizontally disposed, the belt 90 is illus
struction is very expensive from an assembly standpoint
trated as having essentially a 90° twist therein as best
and would, therefore, be prohibitive from a cost stand
shown in FIGS. 3 and 4 of the drawings.
bearing 81 suitably retained in position by a bearing re
Secured to the upper end 87a of the air turbine shaft 87
is an air turbine generally designated at 92. This air
point.
turbine may be secured to the shaft 87 in any suitable
manner. As illustrated, the upper end 87a of the shaft
87 is provided with a flat surface 93 which cooperates
with a corresponding surface de?ned in the shaft receiv 30
cores and the like are required, a problem arises from the
ing opening of the air tubine 92.
.
‘In molding intricate nylon parts in which removable
Suitable fastening
means 94 prevent the air turbine from being lifted off
‘from the shaft 87. The air turbine 92 is disposed within
1a turbine chamber 95 de?ned by the nozzle plate 65 and
fact that nylon in its liquid state is extremely di?icult to
con?ne in a mold. It tends to leak through any of the
joints in the mold, with the result that a very tough and
undesirable ?ash is produced along the junction of the
mating parts of the mold. In making the air turbine 92,
it is necessary to provide a mold having removable sliding
cores or inserts positioned between each one of the turbine
blades 92a. These inserts are each separate weblike mem
bers with the contour of the two adjacent blade mem
a cover member 96 preferably formed of a molded plastic
secured to the nozzle plate by suitable fastening means
bers and which are withdrawn radially in the plane of
the turbine after the nylon has hardened. There are, of
course, two plate members which de?ne the top and
bottom horizontal portions of the air turbine mold cavity.
The radially removable cores are slidably positioned be
tween these two plates. By providing the ?ats 163 and
194 on the turbine blades 92a, it is possible to mold the
'97 (FIGS. 4 and 5). For sealing the chamber 95 against
'air leaks, a suitable sealing gasket 98 is preferably inter
posed between the nozzle plate 65 and the cover 96.
If desired, the front of the cover 96 may be provided
with a recess supporting a suitable escutcheon plate 99
upon which any suitable indicia may be provided. It
‘will be apparent that the air turbine 92 will be driven
by the air ?ow between nozzle chamber 16 and recess
70 so that, in effect, the opening 73 is the exhaust open
ing from the turbine chamber 95.
In accordance with the present invention, the nozzle
plate 65 is provided with an air inlet opening 109 which
interconnects the nozzle chamber 16 and the turbine
chamber 95. This opening 109 is the terminus of an
air turbine 92 as a one-piece nylon device. ‘If the concave
- and convex portions of each blade 92a had intersected
angularly disposed tubular portion 65h integrally formed
such a one-piece air turbine impractical. By providing
the ?ats 103 and 104, however, this is completely elimi
with the nozzle plate 65 and disposed so as to direct the
along a line, the removable inserts for the mold would
have had to ?t together to de?ne a very sharp angle, and
it would have been impossible to mold such an air tur
bine without a large amount of ?ash at the edge of each
blade. The cost of removing this ?ash would have made
nated and the removable inserts can be ?at ground at the
air ?owing through the opening 100 in a tangential direc
edges to insure that the liquid nylon is precluded from
tion thereby to strike turbine blades 92a de?ned around
the periphery of the air turbine 92. When the swivel 75 55 passing through the junctions of the mold parts.
In view of the detailed description included above, the
is connected to a source of suction such as the vacuum
cleaner disclosed and claimed in copending Jepson and ' operation of the cleaning attachment 10 of the present
invention will readily be understood by those skilled in
Wied application Serial No. 39,865, ?led June 30, 1960,
the art. When a source of suction is connected to the
and assigned to the same assignee as the present applica
tion, then air will flow from the nozzle chamber 16 60 swivel 75, and the openings 72 and 77 are in alignment,
the flow of air through the turbine chamber 95 will cause
through the opening 100 and out of the opening 73,
high speed rotation of the air turbine 92, which in turn,
with the result that the air turbine 92 is driven at high
by virtue of the pulleys 34 and 88 and the belt 90, will
speed, which in turn causes the brush 32 to rotate. As
drive rotatable brush 32. If for some reason the user of
illustrated in FIG. 3 of the drawings, the swivel 75 is
provided with an opening 102 to receive suitable locking 65 the cleaning attachment 10 wishes to stop the action of
the brush 32 without terminating the suction at swivel
means disclosed in the copending J'epson and Wied ap
75, it is merely necessary to pivot the swivel from the
plication referred to above.
position shown in FIG. 3 to the position shown in FIG. 6
An important feature of the present invention resides
thereby opening a by-pass, with the result that the air ?ow
in the construction of the air turbine 92 whereby solid
objects such as coins or the like moving at high speed 70 through the turbine chamber 95 is reduced sufficiently to
terminate the operation of the rotary brush 32. The
adjacent air turbine 92 will neither damage nor jam
nozzle portion 12 may furthermore be adjusted to different
the operation thereof. To this end, the air turbine 92
heights in a simple manner, and brush wear can be cor
is molded as one piece from nylon, which is a su?iciently
tough material to withstand coins impacting the blades
at high velocity. To prevent jamming of the turbine by 75
rected by merely reversing the bearing blocks 40.
While there has been shown and described a particular
3,071,799
9
‘
10
embodiment of the present invention, it will be apparent
to those skilled in the art that various changes and modi
?cations may be made without departing from the inven
tion in its broader aspects, and it is, therefore, contem
plated in the appended claims to cover all such changes
comprising a housing unit de?ning a nozzle chamber,
means on said housing unit de?ning a depending portion
provided with a pair of spaced downwardly opening notch
and modi?cations as fall within the true spirit and scope
secured to said housing unit for holding said shaft in said
selected one of said notch means, a pair of wheels
mounted on said shaft for supporting said housing unit
of the invention.
What is claimed as new and desired to be secured by
Letters Patent of the United States is:
‘ V
means of different depths, a shaft adapted to be selec
tively disposed in either of said notch means, means
on a surface to be cleaned, and additional supporting
1. An air operated cleaning attachment for use with a 10 means for said housing unit disposed intermediate said
vacuum cleaner comprising a housing unit de?ning a
pair of said wheels and said nozzle chamber, whereby the
nozzle chamber and a turbine chamber, a rotatable brush
height of said nozzle chamber relative to the surface to
mounted in the nozzle chamber, an air operable turbine
be cleaned may be varied in dependence upon the par~
wheel mounted in the turbine chamber with a substan
ticular notch means in which said shaft is disposed.
tial clearance around the entire periphery of the turbine 15 - 7. A cleaning attachment as set forth in claim 6 above
wheel, said housing having an air opening interconnecting
wherein said means for holding said shaft in a selected
said chambers and terminating beneath said turbine wheel
one of said notch means comprises a leaf spring adapted
near the periphery thereof and having a suction opening
to resiliently bias said shaft into the selected one of said
communicating with said turbine chamber beneath said
notch means.
turbine wheel and near the periphery thereof, and means
8. An air operated cleaning attachment for use with a
drivingly interconnecting said turbine Wheel and said
vacuum cleaner comprising a housing unit de?ning a
brush.
.
nozzle chamber and a turbine chamber, said housing unit
2. An air operated cleaning attachment as set forth in
including a narrow depending portion de?ned by a pair
claim 1 above wherein said openings are spaced apart in
of spaced side walls, each side wall being provided at its
said turbine chamber less than one-half the angular 25 bottom edge with a downwardly opening ?rst notch and
distance of a revolution of the turbine wheel.
a downwardly opening second notch deeper than said
3. An air operated cleaning attachment as set forth in
?rst notch and spaced from said ?rst notch, the ?rst
claim 1 above wherein said turbine wheel is of one-piece
notches in each side wall being aligned and the second
nylon construction.
‘
notches in each side wall being aligned, a shaft adapted
4. An air operated cleaning attachment adapted for 30 to be disposed in a selected pair of said aligned notches,
connection to a vacuum cleaner comprising a housing
means secured to said housing unit for holding said shaft
unit de?ning a nozzle chamber and a turbine chamber, a
in said selected pair of aligned notches, a rotatable brush
rotatable brush mounted in the nozzle chamber, an air
mounted in the nozzle chamber, a turbine wheel rotatably
operable turbine wheel mounted in the turbine chamber,
mounted in said turbine chamber, means drivingly inter
said housing having an air opening interconnecting said 35 connecting said brush and said turbine wheel, a ?rst pair
chambers and terminating near the periphery of said tur
of rotatable Wheels mounted on said shaft, and a second
bine wheel, means de?ning a suction opening communi
cating with said turbine chamber near the periphery of
said turbine wheel, means drivingly interconnecting said
pair of wheels rotatably mounted to said housing inter
mediate said ?rst pair of said wheels and said brush
whereby the height of said nozzle chamber relative to
turbine Wheel and said brush, and means communicat 40 the surface to be cleaned may be varied in dependence
ing with said suction opening for varying the suction
applied thereto to terminate the operation of said brush
upon the particular pair of aligned notches in which said
shaft is disposed.
'9. The air operated cleaning attachment of claim 1
wherein said turbine wheel is of one-piece construction
even though the cleaner connected to said attachment con
tinues to produce a suction, said last-mentioned means in
cluding a swivel type connection to said housing unit 45 including a disk portion and a plurality of radial blades
adapted for connection to said vacuum cleaner.
projecting from the periphery of said disk portion, each
5. An air operated cleaning attachment for use with a
of said blades having a concave surface and a convex sur
vacuum cleaner comprising a housing unit de?ning a
face and provided with upper and lower ?at surfaces in
nozzle chamber and a turbine chamber, a rotatable brush
terconnecting said concave and convex surfaces.
mounted in said nozzle chamber, an air operable turbine
10. An air operated cleaning attachment as set forth in
wheel mounted in said turbine chamber, means drivingly
claim 9 above wherein said turbine wheel is a nylon wheel.
interconnecting said turbine wheel and said brush, said
housing having an air opening interconnecting said cham
bers and terminating in said turbine chamber near the
periphery of said turbine wheel, a suction control chamber
beneath said turbine chamber communicating with said
turbine chamber near the periphery of said turbine wheel, '
a semicylindrical swivel chamber having an opening com
municating with said suction control chamber, and a swivel
tube terminating in a cylindrical swivel portion at least 60
partially receivable within said swivel chamber and pro
vided with an opening aligned with said last-mentioned
opening when said swivel tube is in a ?rst position and
providing a bypass around said last-mentioned opening
65
when said swivel tube is in a second position.
6. A cleaning attachment for use with a vacuum cleaner
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,146,268
vPowell ______________ __'._ Feb. 7, 1939
2,509,964
2,683,276
2,744,272
2,764,099
Cross _______________ __ May 30,
Olsen _______________ __ July 13,
Theis et al. ___________ __ May 8,
Wernert _____________ __ Sept. 25,
1950
1954
1956
1956
2,904,817
Brennan ____________ ._:_ Sept. 22, 1959
2,930,069
2,938,225
2,946,080
Kowalewski __________ __ Mar. 29, 1960
Carabet _____________ __ May 31, 1960
Burch _______________ __ July 26, 1960
561,353
Great ‘Britain _______ __'__ May 16, 1944
FOREIGN PATENTS
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