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Патент USA US3074227

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Jan. 22, 1963
M, 1, sHEPs ET AL
3,074,217
SHUT-‘OFF VALVE MECHANISM FOR WET PICK-UP VACUUM CLEANER
Filed May 29, 1961
2 Sheets-Sheet 1
FIG. I
I7
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V
I7
INVENTORS
MARTIN l. SHEPS
HARRY L. BEAM
ATTORNEY
Jall- 22, 1963
M. l. SHEPS ET AL
3,074,217
SHUT-OFF VALVE MECHANISM FOR WET PICK-UP VACUUM CLEANER
Filed May 29. 1961
2 Sheets-Sheet 2
2|
22
"
E
'i' '
i
INVENTORS
MARTIN I. SHEPS
HARRY L. BEAM
BY
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/
ATTGRNEY
United States Patent 0 ’ rice
3,?4,2l'l
Patented Jan. 22, 1953
1
2
3,074,217
24) and a stationary fan member 27 positioned inter
mediately of the rotating fans 25 and 26.
SHUT-OFF VALVE MECHANISM FOR WET
PICK-UP VACUUM CLEANER
With reference to FIGURES 1 ‘and 2, the vacuum
cleaner
v1i) herein illustrated is capable of picking up
Martin I. Sheps, Baltimore, and Harry L. Beam, Towson,
liquids, as for example soapy water, with the result that
- Md., assignors to The Black and Decker Manufacturing
the liquid and dirt particles enter via inlet 17 and are
Company, Towson, Md, a corporation of Maryland
collected in the bottom of the tank 12; and the clean air
Filed May 29, 1961, Ser. No. 113,283
5 Claims. (Cl. 55—216)
then passes through the dust bag 21 and the suction
tan assembly 20 to be discharged via air exhaust 13.
The present invention relates to ‘a shut-oil valve mech 10 The shut-off valve mechanism 23 includes a bifurcated
anism for a wet pick-up vacuum cleaner, and more par
cut-off lever 23 pivoted intermediate its ends on a pivot
ticularly, to such a valve mechanism that is responsive
rod 29, with the pivot axis being offset radially with re
to the liquid level, such that when a certain predeter
spect to the air intake opening 35 in the suction fan as
mined level of liquid is reached in the tank, the valve
sembly 20, and with the pivot axis being transverse to
mechanism is actuated to preclude the further intake of 15 the vertical axis of tank 12; and the cut-off lever 28 in
liquid in the cleaner.
cludes a pair of diverging legs 3% and 31, one of which
It is an object of the present invention to provide, for
(36) projects upwardly within the tank 12 and the other
use in conjunction with a wet pick-up vacuum cleaner, a
of which (31) depends downwardly within the tank 12.
shut-oil valve mechanism that includes a pivoted bifur
A ?oat 3-2 is secured to the end of leg 31 of- lever 28, and
cated cut-off lever, one end of which carries a ?oat, and 20 the ?oat 32 is adapted to ?oat upon the level 33 of the
the other end of which carries a closure member.
liquid collected in- tank 12. A valve closure member 34
-It is another object of the present invention to provide
is connected to the end of the other legs 30 of lever 28,
a shut-off valve mechanism that obviates the necessity
and the closure member 34 is adapted to seat against and
for sliding closure members operating in vertical guide
seal old the opening 35 in the suction fan assembly 20,
ways.
25 thus precluding the further intake of liquid in tank 12.
It is yet another object of the present invention to
With reference to FIGURES 3 and 4, the bag stretcher
provide a shut-off valve mechanism which will not clog
22 includes a pair of adjacent straps 36 and 37 having re
because of dirt and debris, which will not jam because of
spective eyelet brackets 38 and 39 through which the
water or air ?ow loading, and which is inherently rugged
pivot rod 29 is inserted; and a washer 40, transverse bolt
and reliable, inexpensive to manufacture, and easy to
41, and nut 42 .are used to secure the pivot rod 29 against
install.
endwise movement out of the eyelet brackets 38 and 39
It is yet still another object of the present invention
in the straps 36 and 37, respectively, the pivot rod 29
to provide a shut-o? valve mechanism that may be sold
still being allowed to turn or pivot about its longitudinal
separately as an accessory and then installed easily in
35 axis. The lever 28 is then secured to the pivot rod 29
the ?eld.
by means of a bolt 43 and nut 44. Moreover, where
It is a further object of the present invention to pro
leg 31 of lever 28 passes through the dust bag 21, a
vide a shut-elf valve mechanism having a pivoted cut
rubber grommet 45 is inserted for sealing purposes.
o? lever, wherein the pivot axis is oilset radially with
With reference to FIGURE 5, the ‘leg 30 of lever 28
respect to the air intake opening of the suction fan as
carries the valve closure member 34, which comprises
40
sembly for the vacuum cleaner.
an annular rubber sealing washer 46, a ?at circular
These and other objects of the present invention will
metal backing plate 47, a bolt 48 spot-welded to the
become apparent from -a reading of the following speci?
undersurface of plate 47, a Washer 49 abutting against a
cation, taken in conjunction with the enclosed drawings,
shoulder in bolt 48, and a locking nut 50. The leg 39
in which:
has an opening 51 having su?‘icient clearance with respect
45
FIGURE 1 is a side elevational view of the complete
to bolt .48, such that the leg 33 may have su?icient clear
wet pick-up vacuum cleaner, with part of the tank and
ance to move axially of the bolt 48, as shown in FIG
dust bag being broken away in illustrate the shut-ofIr
URE 2.. The sealing washer 46 seats against the under
valve mechanism;
surface 52 of suction fan assembly 20, thereby sealing
FIGURE 2 is a view corresponding to a portion of
o? the air opening 35 in the suction fan assembly 20
FIGURE 1, but showing the valve mechanism in an al 50 and precluding the further intake of liquid.
ternate position;
With reference to FIGURE 6, the ?oat 32 is secured
FIGURE 3 is a view taken along the lines 3—3 of
to leg 31 by means of bolt 53, washer 59, and nut 55;
FIGURE 1;
‘
and preferably, the ?oat 32 is made of Neoprene, but
FIGURE 4 is a view taken along the lines 4—-4 of 55 other materials, such as styrene or cork may be used, as
FIGURE 3;
FIGURE 5 is an enlarged view, partly in elevation
and partly in section, of the closure member for the valve
mechanism; and
well as a hollow metal ?oat.
‘Obviously, many modi?cations may be made without
departing from the basic spirit of the present invention;
and therefore, within the scope of the appended claims,
vFIGURE 6 is a view taken along the lines 6—-6 of 60 the invention may be practiced other than has been
FIGURE .1.
With reference to FIGURE 1, there is illustrated a
speci?cally described.
We claim:
wet pick-up vacuum cleaner 10 having a base portion 11,
‘1. In a wet pick-up vacuum cleaner, the combination
a cylindrical tank '12, rear wheels 13, front caster 14,
of a tank, a suction fan assembly having an air intake
handle 15, motor 16, inlet 17 formed in the cylindrical 65 opening within said tank, a dust bag surrounding said
wall of tank 12, air exhaust 18, a cover or top portion
fan assembly and a shut-off valve mechanism within said
19 of the tank 12, a suction fan assembly 20 mounted
tank and comprising a bifurcated cut-oif lever having a
within the top portion 19, a dust bag 21, a dust bag
pair of diverging legs, said lever being pivoted inter
stretcher ‘22, and a shut-off valve mechanism denoted
mediate said legs, one of said legs depending downwardly
generally as at 23. Moreover, the motor-16 is provided 70 within said tank, and the other of said legs projecting
with a shaft 24; and the suction fan assembly 20 in
upwardly within said tank, one of said legs passing
cludes rotating fan members 25 and 26 (mounted on shaft
through said dust bag, a ?oat carried by the said one of
3,074,217
4
3
said ?oat being adapted to ?oat upon the liquid level
said legs and adapted to ?oat upon the liquid level in
in said tank and below said inlet in said tank, and a
said tank, and a closure member carried by the said
closure member including an annular sealing washer se
other of said legs, said closure member being intermedi
cured to said one of said legs, said closure member being
ate said dust bag and said air intake opening of said
intermediate said dust bag and said air intake opening
suction fan assembly, whereby as the liquid level rises
of said suction fan assembly whereby as the liquid level
in said tank, said lever pivots and said closure member
rises in said tank, said cut-off lever pivots about said pivot
ultimately seals off said air intake opening of said suc
rod, whereby said ?oat rises in said tank and said seal
tion fan assembly, thereby shutting off the suction eifect
ing washer ultimately seals off said air intake opening in
of the cleaner.
2.. The combination according to claim 1, wherein said 10 said suction fan assembly, thereby shutting oil the suc
tion e?ect of said cleaner.
tank has a vertical axis, and wherein said cut-oft lever
5. In a wet pick-up vacuum cleaner, the combination
has a pivot axis which is offset radially with respect to
'of a hollow upright ‘tank having a vertical axis, said tank
said vertical axis of said tank, said pivot axis being above
having a wall including an inlet formed therein, said
the liquid level at all times.
,
3. The combination according to claim 1, wherein said 15 tank further having a top portion, a suction fan assem
bly mounted in said top portion of said tank and depend
closure member comprises an annular sealing washer
ing downwardly into said tank, said suction fan assem
adapted to close off said air intake opening in said
bly having an air intake opening accessible from within
suction fan assembly, a circular flat backing plate for
said tank, said air intake opening being substantially
said washer, a bolt secured to plate and depending there
from, and a washer and nut on the end of said bolt, and 20 aligned on said vertical axis of said tank, and a shut-off
valve mechanism' within said tank and comprising a
wherein one of said legs of said lever has an opening
lever member having a pair of diverging legs, means to
therein, said bolt passing through said opening with suf
pivot-ably mount said lever intermediate said legs for
ficient clearance at all times, and said one of said legs
pivoting movement within said tank about an axis which
being between said plate and said washer.
4. In a wet pick-up vacuum cleaner, the combination
of a hollow upright tank having a vertical axis, said tank
having a wall including an inlet formed therein, said
tank further having a top portion, a suction vfan assembly
mounted in said top portion of said tank and depending
is transverse to said vertical axis of said tank and which
is offset radially from said vertical axis of said tank,
said stretcher including a pair of adjacent straps, a pivot
axis, and thereby causing said closure member to seal oil
said air intake opening of said suction fan assembly at
a predetermined level of liquid ‘in said tank.
one of said legs of said lever projecting upwardly within
said tank, :a closure member secured to said one of said
legs for limited vertical movement substantially on said
downwardly into said tank, said suction fan assembly 30 vertical axis of said tank, the other of said legs of said
lever depending downwardly within said tank, and a
having an air intake opening accessible from within said
?oat secured to said other of said pair of legs, said ?oat
tank, a dust bag mounted within said tank and disposed
being adapted to ?oat upon the liquid level in said tank,
concentrically about said suction fan assembly, a dust
whereby, ‘as the level rises in said tank, said ?oat rises
bag stretcher mounted within said tank and disposed
accordingly, thereby causing said lever to pivot about its
between said suction fan assembly and said dust bag,
rod secured to said straps, said pivot rod having a trans
verse axis Which is offset radially with respect to said
vertical axis of said tank, a bifurcatedcut-o? lever having 40
a pair of ends and pivotably mounted upon said pivot
rod intermediate said ends, said cut-oft lever having a
pair of diverging legs each projecting towards said verti
cal axis of said tank, one of said legs or" said cut-o? lever
projecting upwardly within said tank, the other of said, 45
legs of said cut-oil lever projecting downwardly within
said tank and passing through said dust bag, a grommet
between said dust bag and the other of said legs, a ?oat
secured to said other of said legs of said cut-off lever,
References Cited in the file of this patent
UNITED STATES PATENTS
1,856,105
2,404,795
2,703,152
2,863,524
2,989,769
Marden ______________ __ May 3,
Garretson ____________ __ July 30,
Peterson _____________ __ Mar. 1,
Buda ________________ .. Dec. 9,
Houser ______________ __ June 27,
1932
1946
1955
1958
1961
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