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Патент USA US2126362

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Aug. 9, 1938.
u. A, WHITAKER ET AL
2,126,362
SUCTION CLEANER
Filed NOV. 20, 1955
5 Sheets-Sheet l
Ff‘? 2
Charles lillbéjlbg;
Urea/3A . W?l'l‘aker
ATTORNEY
Aug. 9, 1938.
2,126,362
U. A. WHITAKER'ET AL
SUCTION CLEANER
Filed Nov. 20, 1935
3 Sheets-Sheet 2
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Aug. 9, 1938.
‘u. A. WHITAKER ET A1.
2,126,362
SUCTION GLEANER
Filed NOV. 20, 1935
3 Sheets-Shegt 3
INVENTOR
Char/e517ZZZ‘yl‘or
UrzcasAM/hz'iaker
IYQIIJ/? Wile
ATTORNEY
2,126,362
Patented Aug. .9, 1938
UNITED STATES ‘PATENT OFFICE
2,125,362
SUCTION CLEANER
Uncas A. Whitaker and Harry B. White, Canton,
and Charles H. Taylor, North Canton, Ohio,
assignors to The Hoover Company, North Can-
‘
ton, Ohio, a corporation of Ohio
Application November 20, 1935, Serial No. 50,634
* 14 Claims. .(Cl. 15—-6)
The present invention relates to suction clean _ end play of the supporting shaft for the front
.
ers in general and more particularly to new and wheels;
novel improvements in suction cleaners adapted
for on-the-?oor cleaning, and for both suction
5 and blowing-in-o?f-the-?oor cleaning. More
speci?cally, the invention comprises new and
novel improvements in the conversion means by
which the cleaner is transformed from an on-the
floor unit to an off-the-?oor unit, and vice versa.
It is an object of the present invention to pro
vide a new and improved suction cleaner.
It is
another object of the invention to provide a new
and improved suction cleaner adapted for on-the
?oor cleaning, and for both suction and blowing
off-the-?oor cleaning. Still another object is the
provision of a suction cleaner adapted for both
blowing and suction off-the-?oor cleaning, and
in which the nozzle and the positively driven agi
tator therein are lifted above the cleaning surface
20 in the ofi-the-iioor cleaning operation. A still
further object is to provide a suction cleaner in
the blowing off-the-floor cleaning relationship of
which air enters the suction-creating means
through an inlet other than the suction nozzle.
A further object is to provide a suction cleaner in
which an improved type of converter valve func
tions to change the cleaner from an on-the-?oor
Figure 6 is a partial bottom view of the cleaner,
‘similar to Figure 2, but with the converter valve
moved to its position in the of‘i-the-?oor cleaning relationship ;
5.
.
Figure 7 is a section upon the line 'l--‘l of
Figure 6 illustrating how the converter valve ex~
tends across the air passageway between the fan
chamber and the nozzle to seal the latter from 10
the suction-creating means;
Figure 8 is a section upon the line 8-485 of Fig»
ure 6 and illustrates the mechanism by which the
cleaner nozzle is raised upon the movement of the
converter to its off-the-ficor position shown in 15
Figure 6;
Figure 9 is a section upon the line t--@ of Fig
ure 6 and shows the manual adjustment for the
front supporting wheels;
Figure 10 is a top view of the cleaner with cer~ 20
tain ‘parts of the casing broken away to show the
blower valve which seals the blower conduit from
the exhaust or high pressure side of the suction
creating means;
‘
Figure 11 is a transverse vertical section upon 25
‘the line ll-—ll of Figure 10 and shows a dusting
tool hose connected to the blower conduit and the .
cleaning unit to an off-the-?oor cleaning unit. - blower valve pivoted into a position to direct air
I
Still another object is the provision of a suction into the blower conduit;
30 cleaner in which interlocking mechanism prevents
the use of the cleaner as an off-the-?oor blowing
unit until the cleaner nozzle has been sealed from
the suction-creating means and the nozzle has
been raised from the supporting surface. These.
and other more speci?c objects will appear upon
reading the following speci?cation and claims and
upon considering in connection therewith the
attached drawings to which they relate.
Referring now to the drawings in which the
same reference characters refer to the same parts
throughout:
Figure 1 is aside view of a suction cleaner con
structed in accordance with the present invention
with certain parts of the casing broken away;
Figure 2 is a bottom view of the cleaner of
Figure 1 with a portion of the bottom piece broken
away to show the mounting of the front wheels;
Figure 3 is a section upon the line 3-3 of Fig
ure 2, and illustrates a closure valve at the eye of
the fan chamber in the air passageway connecting
the fan chamber to the nozzle;
Figure 4 is a view of the valve element of Fig
ure 3,
Figure 5 is a section taken upon the line 5-5 of
Figure 2 and illustrates the means for preventing
Figure 12 is a section upon the line lZ-It of 30
Figure 10 and illustrates the’ locking means by
which the converter is retained in either its oper
ative or inoperative position;
Figure 13 is a partial side view of the cleaner
with dusting tool connected and with parts broken
away and showing the position of the dusting tool
hose lock-out for the blower conduit with the
converter in its operating position;
Figure 14 is a section through the blower valve
.40
upon the line I4--l4 of Figure 10;
Figure 15 is a partial view of the blower valve
and the actuating mechanism by which the valve
is operated upon the insertion of the dusting tool
connector.
_
-
.
A suction cleaner constructed in accordance 45
with the present invention is basically the same as
a suction cleaner which is designed for on-the
floor cleaning. only.
A suction nozzle l is pro
vided with surface-contacting front and rear
lips 2 and 3 respectively. An air passageway 4
having a removable bottom plate 5 connects the
nozzle I to the eye 6 of the fan chamber, there
being a manually operable spring-pressed detent
8 which cooperates with a lug 9 upon the bottom
65
plate 5 to retain it in place.
2
2,126,362
Within fan chamber ‘I is positioned a suction
ing into the nozzle is aided and assisted by the
creating ‘fan III. A motor casing II is positioned
rotating agitator to dislodge embedded foreign
immediately above the .fan chamber and houses
matter in a surface covering undergoing clean
ing and that foreign matter is removed from the
air as it passes through the dust bag I‘! in leaving Ch
an unshown driving motor, the shaft l2 of
which extends downwardly through the fan
chamber ‘I and into the air passageway 4 where
it is formed as a driving pulley H.
A rotary agitator l4 including rigid beating
elements and?exible brush elements is mounted
the apparatus.
'
In addition to the parts of the cleaner which
are necessary for on-the-floor cleaning, the
cleaner constructed in accordance with the pres
10 within nozzle 1 and is adapted to contact a sur
ent invention is also provided with means which
face covering between the nozzle lips 2 and 3.
Agitator “is provided centrally with a pulley
surface which seats a belt l5 driven by the shaft
pulley l3 at the lower end of motor shaft l2.
An exhaust outlet 16 extends rearwardly from
15
enable it to function as a suction unit or as a
the fan chamber 1 to convey air under pres
. sure therefrom. A dust bag ll of any suitable
' construction seats upon the outer end of the ex
haust outlet being retained in place by nuts
20 l8,
l8 which clamp the bag ring l9 to the
?anged outer end of the exhaust outlet.
The cleaner is movably supported by ‘rear
wheels 20, 20 and by front wheels 2|, 2|, ‘the
latter being mounted upon crank arms at the
extremities of a transversely extending shaft 22.‘
Shaft _22 is rotatably mounted on the underside
of the top wall of the nozzle l in seat-forming
brackets 23 illustrated in Figures 2 and 5, end
play in the shaft being prevented by means of
30 a projection 24 which is slidable within a cir—
cumferential slot 25 in one of the brackets.
The nozzle I of the cleaner is raised and
lowered by a manual adjustment mechanism
comprising a rotatable knob 26. Member 26, as
35 is most clearly illustrated in Figure 9, includes
an internally threaded sleeve which encloses an
externally threaded sleeve 21 whichgit advances
blower unit in off-the-floor cleaning. To enable
it to function as a suction unit in off-the-iloor
cleaning there is provided a. converter member
35 which is pivotally vmounted upon a pin 36 15
on the under side of the fan chamber 1 imme
diately in the rear of the fan eye 6. Converter 35
includes a forward portion shaped as a valve
which is adapted to extend across the air pas
sageway 4 between the fan eye 6 and the nozzle 20
to cooperate with the top, bottom and opposing
side wall of the air passageway to seal the nozzle
from the fan chamber. The converter also in
cludes a conduit portion which is rectangular
in cross section and which is of such length 25
that with the valve portion of the converter seal~
ing the nozzle from the fan chamber the conduit
34 of the converter is connected to the suction
creating means.
Converter 35 is adapted to assume two posi
tions, one of which is illustrated in Figure 2
and the other in Figure 6. In its inoperative or
on-the-?oor cleaning position it is retained as il
lustrated in Figure 2 and lies below the fan
chamber 1 and the exhaust air passageway l6.
To protect the converter further from contact
with foreign objects a protector plate 31 is pro- -
into or from the nozzle upon being itself ro
tated. A plunger 23 slides within sleeve 21 and
40 is connected ,at its lowerend to a bracket 29
vided which underlies the converter in its in
mounted upon the adjacent wheel-carrying
crank arm at the end of shaft 22. The front
wheels are normally retained in the uppermost
position permitted by the contact of the end of
45 bracket 29 with the upper‘or inner end of sleeve
inoperative positions there is provided a spring
pressed latch 38 at the outer end of the conduit
portion. The latch is illustrated in detail in
Figure 12. In the inoperative position of the
operative position, illustrated in Figure 2.
To retain the converter in its operative and 40
converter the latch extends against the rear
21 by a coil spring 30 which encircles a central
portion of shaft 22 and exerts a rotating torque
thereon. The shaft may be rotated to lower the
edge of protecting plate 31, as illustrated in Fig
wheels against the force exerted by the spring
position is accomplished by depressing the end
50 without adjustment of the manual adjusting
means. The manual adjusting means, however,
at all times determines the upper limit of wheel
movement and adjustment.
ure 2, and in the operative position of the con
verter fits within a seat 39. Release from either
of the latch.
50
At one side of the fan eye 6 the air passage
way 4 is provided with a pivoted gate or valve 40,
illustrated in Figures 2, 3 and 4. Valve 40 is nor
As in the usual suction cleaner, a handle is ' mally held. by means of a torsion spring 4|, in
sealing relationship to an opening 42. The for
55 provided, the lower end of'which is indicated
at M in Figure 1, and the cleaner can be pro
pelled over a surface undergoing cleaning by the
exertion of a moving force thereon. It is com
mon practice in suction cleaners to support the
60 upper end of the dust bag II from the handle,
and while it is not part of the present invention
' the same means may be used here if desired.
The cleaner partshereinbefore described are
sufficient to provide a cleaner for on-the-?oor
65
operation. In that operation the driving motor
rotates the suction-creating fan and a reduced
pressure is ‘effected within the nozzle l resulting
in the lifting of the surface covering against
the lips 2 and 3 and the drawing of cleaning air
70 through the nozzle, through the fan chamber ‘I,
and exhausting it into the'?ltering bag II. The
driving pulley II at the lower end of the motor
shaft is also rotated and the rotary agitator
l4 within the nozzle is driven therefrom by the
75 interconnecting belt II. The cleaning air rush
' ward or inner end of the valve portion of con
verter 35 extends adjacent opening 42 and is
adapted to pass through that opening, as the
converter pivots to enter the air passageway to
perform its function of sealing the nozzle from
the suction-creating means. In this movement
the forward end of the converter contacts the
valve 40 and pivots it to open position.
_
In the conversion of the machine from an on
the-floor cleaner to an oiI-the-floor cleaner the
operator ?rst depresses the latch 38 permitting
the converter to be pivoted from the position
shown in Figure 2 to that, shown in Figure 6.
This may be done with the foot. The valve por
tion of the converter moves through the opening
42 in the air passageway, pivoting inwardly the
valve 4|! against the force exerted by spring 41,
and extends across the air passageway as illus
trated in Figures 6 and 7. Upon'the converter
reaching its inner sealing position the latch 38 75
,
pletion of the conversion of the machine to an
o?-the-?oor blowing unity is then accomplished
by the .use of the construction hereinafter de
seats within the seat 39 and the converter is
locked in’ place until intentionally displaced
therefrom. With the converter so positioned the
.suction of the suction-creating means is effective
within the converter conduit and the nozzle is
scribed.
'
'
The cleaner casing or body immediately in
the rear of .the motor casing Ii and above the
exhaust outlet i6 is provided with a blower con
duit or seat at which extends transversely across
the cleaner and is open at one end. The bottom
wall of the conduit which wall is also the top wall 10
I sealed therefrom.
During the operation oi the cleaner in o?-the
floor cleaning, however, the agitator it continues
to be driven.
3
2,126,362
To eliminate the possibility of sur
10 face contact by this element, with resultant un
necessary load upon the cleaner motor, auto
matic means are provided to depress the front
supporting wheels M, ii to raise the nozzle and
the agitator. This mechanism comprises a con
verter-contacting lever arm it which is pivoted
upon a vertical pivot pin ltd. Lever tit carries a
roller contact M at its outer end which is adapted
to roll on and receive iorce from the side of con
verter it to pivot the lever arm. A shaft-con
20 tacting lever M is pivoted upon lever arm at at a
of exhaust outlet it, is provided with an opening
or port it which is normally closed, when the
cleaner is not used as a blowing unit, by a blower
valve bl pivotally mounted upon a transverse
shaft ht positioned in the air passageway it
immediately in the rear of the conduit. As
shown in Figure l-i‘ the pivotal aids hill of the
valve is protected by an enclosing seal member
till to prevent the accumulation of foreign
matter.
ill. Lever it slides upon a vertical pin it upon
its actuating lever iii being moved, being pro
vided with a slot til which directs its forward end
forwardly and into contact with the wheel shaft
it as illustrated in Figures 6 and 8. A coil spring
ht is positioned at the pivot point vltd of lever it
and functions to pivot lever arm to hold the for
ward end of lever [it in contact with the cranl:
30 arm of shaft iii, as illustrated in Figure 8.
-
20
The actuatingmeans for valve bl is illustrated‘
point spaced from pivot pin M, as indicatedat
in Fig. 15 and comprises a cam member it car
ried by shaft it adjacent the mouth of conduit
55, as shown in Figure 13. A spring ti connects
at one end to the cleaner body and at its oppo 25
site end to the cam member it and functions to
hold the valve normally in its upper position to
close port it and seal the blower conduit 5% from
the suction-creating means and exhaust passage
way iii. The cam member it is formed with a 30
The
which extends helically around the shaft
normal on-the~?oor cleaning position of the shaft » groove
M of the valve as an axis. The conduit bit is.
is determined, of course, by the position of the formed
at its mouth with a slot immediately ad
manual adjusting means it in cooperation with
the coil spring it acting to hold the shaft in
the uppermost position permitted by the adjust
ment.
Upon the converter
being moved from its '
inoperativeposition, shown in Figure 2, to its
operative or oi‘i-the-?oor position, shown in
Figure 6, lever arm dd is pivoted from. the position
shown in Figure 2 to the position shown in Figure
6 by the contact of the side of the converter with
‘the roller 1%. The‘pivotal movement of arm dd
results in the advancement of shaft-contacting
arm it which slides upon supporting pin it. This
forward movement of the arm lit results in a
downward movement of the crank arms and of
the front supporting wheels ii, iii. The wheels
are pivoted downwardly from an upper position,
as indicated in dotted lines in Figure 8, to a lower
position, as indicated in full lines in the same
?gure. 'li‘his downward movement of the wheels
results in the raising of the front end of the
cleaner including the nozzle and the agitator.
In the cleaning oi articles in oiiY-the-?oor opera,
ation it is often desirable to use positive pressure
or a‘ blowing action rather than suction.
In
cleaning radiators and pipes, for example, it is
often desirable to blow dust and foreign objects
60 from the suriaceto which they adhere. In the
suction cleaner constructed in accordance with
the present invention, the conversion of the ma-_
chine to positive pressure from an on-the-?oor
unit, or from an oiT-the-?oor unit arranged for
suction, is readily and easily accomplished.
To arrange the cleaner for oiiY-the-?oor blow
ing it is first necessary to position the converter
in in its operative or o?-the-fioor position as
though the machine were to be used in o?-the
?oor suction cleaning. The cleaner nozzle is then
sealed from the suction-creating means and the
forward end of the cleaner including the agitator
is_raised from the supporting surface. All air
entering the suction-creating means enters
through the conduit of converter 36. The com
jacent member it so that upon insertion of the‘
rectangular metallic end iii of the dusting tool 35.
hose, the greater length of which is formed of an
elongated flexible tube (it, a projecting pin it
on the lower corner of connector it will enter
the slot and extend into groove in element till. its
the connector is advanced to its seating position
the pin till will cause the cam member tit to ro
tate, thereby rotating the valve hi to open the port
it and to close the exhaust passageway leading
to the dust bag. The withdrawal of the dusting
tool connecter moves the valve again to its lower
conduit-sealing relationship with blower port tilt,
the spring Gil retaining it in this position. it
spring~pressed latch til is provided upon the
top of connector it which extends into a seat in
the upper wall oi the conduit ti and retains the
connecter against accidental displacement.
' To prevent the connection of the dusting tools
hose to the high pressure side of the suction1
creating means unless the forward end of the
cleaner has first been raised, there is provided a 55
lookout member W. Member
is in the shape
of a right angle with its upper end extending
into the conduit 5% during on-the-l‘ioor cleaning.
Lockout lid is provided with a coil spring til which
urges lockout to from the conduit.
60
With con
verter it in its inoperative position the outer end
of lockout (it, which is formed as a camming
surface it, rests upon its top, as shown in Figure
1, thereby holding the opposite end of the mem
her in conduit-obstructing position, and render
ing it impossible to insert the dusting tool con
necter into the blower conduit. ‘Upon the move
vrnent oi the converter in to its operative posi
tion, as illustrated in Figure 13, the converter is
displaced from below the end of the lookout and 70
that member moves downwardly, under ‘force
exerted‘ by spring 61!, resulting in its inner and
upper end- moving outside ‘the conduit and per
mitting of the insertion of the dusting tool con
necter.
‘
//
/
4
/
2,126,362
It is possible to use the cleaner as either an
oiI-the-?oor suction unit or as an o?-the-?oor
combination of suction creating means, a nozzle
having an air inlet passage to said suction creat
blowing unit by inserting the dusting tool con
necter 62 into the proper seat upon the cleaner.
As the converted 35 is always positioned in its
operative position in oif-the-?oor cleaning the
member mounted in said nozzle, a converter
connecter 62 can be inserted therein and retained
by its latching means 65. In this operation the
ing means, a rotary ?oor-covering contacting
member pivotally mounted on said cleaner and
normally positioned exterior said air inlet pas
sage, said converter member being adapted to be
swung bodily into a position‘ to seal said inlet
nozzle is sealed from the suction creating means passage from said suction creating means and
and the blowing conduit is also sealed from the to become a secondary inlet passage, an adjust
exhaust outlet or high pressure side of the _able wheeled support for said cleaner, and means
suction-creating means by the valve 57. If the interconnecting said wheeled support and said
operator desires to blow with the dusting tools he converter member whereby the former is ad
need only withdraw the dusting tool connecter justed to raise and lower said nozzle in a move
15 62 from the converter 35 and insert it‘ into the
blower conduit 55. The insertion of ‘the con—"
necter 62 results in the rotation of the cam mem
ber 60 and the valve 51 which is carried upon its
own shaft 58 connected to the valve member.
The valve assumes a position in which the ex
haust outlet is sealed from the dust bag and air
passing from the suction-creating means enters
the conduit 55 and so will pass into the dusting
tool connecter and hose.
From the foregoing it is seen that an im
proved cleaner has been provided which is readily
transformable from one type of cleaning unit to
another. It is to be understood that the speci?c
embodiment is only ‘illustrative and that the in
30 vention is only limited as recited by the claims
following.
We claim:
'
1. In a suction cleaner of the type adapted for
on-the-?oor and for oiI-the-?oor cleaning,
suction creating means, main and secondary
suction inlets, main and secondary pressure out
lets, valve means to seal said main suction inlet
from said suction creating means and to connect
said secondary suction inlet thereto, valve means
40 to seal said main pressure outlet from the pres
ment of the latter into and out of converting 15
position.
6. In a suction cleaner, a nozzle, a fan cham
ber having an eye, an air passageway connect
ing said eye to said nozzle, a port in said passage
way, a valve normally closing said port, a con 20
verter including a valve portion and a conduit
portion pivoted to swing through said port, forc
ing said valve to its open ‘position, and to extend
across said passageway to seal said nozzle from
said fan chamber eye and to connect its own
conduit portion to that eye.
7. In a suction cleaner, the combination of a
casing having a nozzle and suction creating
means including a fan chamber having an inlet
opening connected with said nozzle through a 30
passageway provided with a port located adja
cent said inlet opening, a valve normally closing
said port, and a converter comprising a conduit
mounted on said casing to be shifted endwise
through said port and, forcing said valve into 35
open position, to extend across said passageway
and close off said nozzle and simultaneously
establish communication with the inlet opening
to said fan chamber.
8. In a suction cleaner, a nozzle, an agitator in 40
sure side of said suction creating means and to
said nozzle, an air passageway, a fan chamber
connect said secondary pressure outlet thereto, connected to said passageway, a fan in said
and means preventing the connection of a dust
chamber, a drive shaft carrying said fan in said
ing tool hose to said secondary pressure outlet chamber and extended therethrough into said
with said main suction inlet connected to said passageway, power-transmitting means connect 45
suction-creating means.
ing said shaft to said agitator and extended
2. The construction recited in the preceding through said passageway, a port in said passage
claim characterized in that said secondary inlet ' way, a valve normally closing said port, and a
is formed on and is movable with the valve which converter including a valve portion and a conduit
seals the main suction inlet from the suction- I portion, said converter being pivoted to swing
creating means.
3. The construction recited in the ?rst claim
characterized in that the means preventing the
connection of a dusting tool hose to the secondary
pressure outlet comprises a lookout obstructing
said outlet and connected to the means to seal
the main suction inlet from the suction-creating
means.
'60
,
'
4. In a suction cleaner, the combination of
suction creating means, a nozzle having an air
inlet passage to said suction creating means, a
through said port, forcing said valve into open
position and bringing its valve portion trans
versely across said passageway to close said
nozzle from said fan chamber, with its conduit
portion projecting from said port.
‘
9. In a suction cleaner having a body,_a nozzle,
55
a fan chamber, an air passageway connecting
said nozzle to said fan chamber, a normally closed
port in said passageway, a converter comprising
a valve portion and a conduit mounted on said 60
rotary ?oor-covering contacting member mount
body and lying substantially within the con?nes
of said body, said converterbeing movable to a
ed in said nozzle, a valved port leading into said
second position in which said valve portion ex
air inlet passage, a conduit plvotally mounted on
tends through said port to close said passageway
with said conduit portion projecting therefrom 65
said cleaner and adapted to be swung bodily
through said port to close off said ?rst mentioned
air passage and to form a secondary air inlet
passage to said suction creating means, adjust
able means for raising and lowering said nozzle,
70 and means operative in the movement of said
conduit into and out of secondary inlet forming
position to actuate said adjustable means to raise
and lower said nozzle.
5. In a suction cleaner adapted to be converted
.75 to and from off-the-?oor cleaning operation, the
to receive a dusting tool hose.
10. In a suction cleaner having a body, a nozzle,
a fan chamber, an air passageway connecting
said nozzle to said fan chamber, a normally closed
port in said passageway, a converter comprising 70
a valve portion and a conduit mounted on said
body and lying substantially within the con?nes
of said body, said converter being movable to a
second position in which said valve portion ex
tends through said port to close said passageway 75
2,126,362
5
outlet, a blower seat for dusting tools, valve
means to close said exhaust outlet and open said
blower seat to said suction-creating means, and
cam means adjacent said seat adapted to be
its positions.
'11. In a suction cleaner, the combination of ; operated by the'seating of a dusting tool unit
in said seat to actuate said valve to connect said
suction creating means, a blower conduit, a suc
with said conduit portion projecting from said
port to receive a dusting tool hose, and means
to secure said converter releasably in either of
tion conduit shiftable into and out of connection
with said suction creating means, and means for
normally obstructing said blower conduit against
10 the seating of a dusting tool unit therein and
operatively connected with said suction nozzle
-whereby said obstructing member is removed
from said blower conduit upon the shifting of
said suction conduit into connection with said
15 suction creating means.
12. In a suction cleaner, the combination of
suction creating means having an air inlet and
seat to said suction-creating means.
14. In a suction cleaner, the combination of a‘
casing having a nozzle and suction-creating
means including a fan chamber normally com 10
municating with said nozzle through an air
passageway having a port in the wall thereof
adjacent said fan chamber, a, valve member nor
mally closing said port, a Wheeled support vfor
said casing adjustable to regulate the height of 15
said nozzle above the ?oor surface, a converter
member comprising a conduit adapted to be in
an air outlet, a conduit shiftable to and from a. serted through said port into a position to close
position to communicate with said suction creat- . o? said fan chamber, and means operative by
said converter in its movement to and from con 20
preventing the attachment of a dusting tool unit verted position to actuate said wheeled support
to said air outlet unless said conduit has ?rst - to raise and lower said nozzle.
been shifted into communication with said
suction creating means.
25
13. In a suction cleaner, a suction-creating
25
means having a suction inlet and an exhaust
ing means through said air inlet, and means fol‘
TAYLOR.
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