U.S. patent number 3,604,049 [Application Number 04/807,621] was granted by the patent office on 1971-09-14 for squeegee vacuum pickup unit for mobile window washer.
This patent grant is currently assigned to Alpana Aluminum Products, Inc.. Invention is credited to Frank W. Hetman.
United States Patent |
3,604,049 |
Hetman |
September 14, 1971 |
SQUEEGEE VACUUM PICKUP UNIT FOR MOBILE WINDOW WASHER
Abstract
The disclosure relates to a vacuum squeegee pickup for a window
washer device including a housing having suction means connected
thereto, the housing further having a mouth with first and second
spaced flexible elongated means on said mouth, the housing
connected to the device and disposed with the flexible elongated
means positioned obliquely with respect to the direction of travel
of the device.
Inventors: |
Hetman; Frank W. (Golden
Valley, MN) |
Assignee: |
Alpana Aluminum Products, Inc.
(Minneapolis, MN)
|
Family
ID: |
25196809 |
Appl.
No.: |
04/807,621 |
Filed: |
March 17, 1969 |
Current U.S.
Class: |
15/302; 15/374;
15/320; 15/401 |
Current CPC
Class: |
A47L
1/02 (20130101) |
Current International
Class: |
A47L
1/00 (20060101); A47L 1/02 (20060101); A71 () |
Field of
Search: |
;15/103,302,320,321,322,401,1.7,353,375 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
634,674 |
|
Mar 1950 |
|
GB |
|
569,799 |
|
Feb 1933 |
|
DD |
|
Primary Examiner: Scheel; Walter A.
Assistant Examiner: Moore; C. K.
Claims
I claim:
1. A device movable over the window and wall surfaces of a building
and having means for washing the surfaces, said device having
squeegee vacuum pickup means to clean the surfaces, the improvement
in said squeegee pickup means, said improvement including in
combination:
a. a housing having
b. suction means connected to and communicating therewith,
c. said housing having a mouth,
d. said mouth having a first flexible means along one side
thereof,
e. said mouth having second flexible means along another side
thereof opposed to and parallel to said first flexible means and
spaced from said first flexible means throughout its length with
the ends of said first and second flexible means open at each
end,
f. said housing rigidly connected to the device and disposed
relative thereto with said flexible means thereof positioned
obliquely and fixed with respect to the direction of travel of the
device in either direction over the building surfaces.
2. The device of claim 1 in which said first and second flexible
mean are each a rectilinear blade.
3. The device of claim 2 in which said mouth is V-shaped in
formation.
4. The device of claim 3 in which
a. said suction means is connected to said housing adjacent the
apex of said V-shaped mouth and
b. said first blades have an opening formed therein adjacent the
apex of said mouth and communicating with said housing.
5. The device of claim 2 in which the mouth of the housing is
rectilinear.
6. The device of claim 5 in which said suction means is positioned
adjacent at least one end of said rectilinear mouth.
7. The device of claim 5 in which said suction means includes two
inlets, one of said inlets connected to and adjacent one end of
said housing and the other of said inlets connected to and adjacent
the other end of said housing.
8. The device of claim 1 in which said mouth is V-shaped in
formation.
9. The device of claim 8 in which said suction means in connected
to said housing adjacent the apex of said V-shaped mouth.
Description
SUMMARY OF THE INVENTION
The invention relates to window washers moved over window and wall
surfaces and more particularly to the squeegee unit thereon having
a vacuum pickup. It is an object of the invention to provide a
squeegee unit having a vacuum pickup between a pair of squeegee
blade formations, the squeegee blade formations being mounted on
the washer device so that the same are oblique to the direction of
travel of the device. With the oblique mounting of the squeegee
blade formations the window and wall surfaces are wiped clean and
the vacuum picks up the cleaning fluid and dirt. Additionally, the
obliquely positioned blades are progressively forced over
crossbars, raised portions or depressions such as joints of a
window surface which lie normal to the direction of travel of the
device. At the point of contract of the blades with the crossbar or
the like, the blade edge portions are distorted temporarily out of
shape. At the point of distortion of the blade a relatively small
opening is formed and due to the small restricted size of the
opening a venturilike passage is formed at the crossbar or raised
window portion through which air is sucked into the vacuum housing
at an accelerated rate which very effectively draws cleaning fluid
and dirt at the edge of the crossbar progressively across the bar
as the washer travels over the window and wall surfaces. As the
blade passes over any raised portion of a window or a depressed
portion such as a joint disposed normal to the direction of travel
of the device a venturi condition is created with the benefit as
outlined above.
These and other more detailed and specific objects will be
disclosed in the course of the following specification, reference
being had to the accompanying drawings, in which
FIG. 1 is a front elevational view of a window washer unit having a
vacuum squeegee pickup embodying the invention.
FIG. 2 is a side elevational view of the device of FIG. 1, a
portion of which is broken away.
FIG. 3 is a sectional view on the line 3--3 of FIG. 1.
FIG. 4 is a sectional view on the line 4--4 of FIG. 1.
FIG. 5 is a perspective view of a portion of a squeegee blade as it
moves over a raised horizontal cross member on a window.
FIG. 6 is a front elevational view of a window washer unit
illustrating a further embodiment of the invention.
FIG. 7 is a sectional view on the line 7--7 of FIG. 6.
FIG. 8 is a side elevational view of the device of FIG. 6, a
portion of which is broken away.
FIG. 9 is a front elevational view of a window washer unit
illustrating a further embodiment of the invention, portions of the
washer unit identical to those of FIGS. 1 and 6 being broken
away.
FIG. 10 is a sectional view on the line 10--10 of FIG. 9.
FIG. 11 is a sectional view on the line 11--11 of FIG. 9.
Referring to FIGS. 1-5 of the drawing in detail, the window washer
W having the vacuum squeegee pickup unit A includes the washer
housing 12 formed of the spaced sidewalls 14 and 16 connected by
the rear wall 18. Mounted on the housing 12 is the rotatable
cylindrical brush 20 driven by the motor 22 through the chain 24
mounted on the gear 26 of the motor and the gear 28 mounted on the
end shaft 30 of the brush. Further provided is the plurality of
spray nozzles 32 mounted on the liquid supply tube 34 to which a
supply of fluid is pumped by conventional means not shown, one form
of which is disclosed in application Ser. No. 553,351.
The lower ends of the sidewalls are connected by a bottom wall 33,
and the upper ends of the sidewalls are connected by a top wall 35.
The numeral 36 designates a tank mounted on the lower end of the
housing which contains a supply of cleaning liquid pumped to the
nozzles 32 and circulated back to the tank by means such as shown
in application Ser. No. 553,351. The housing 12 has mounted on the
front edge of the sidewall 14 of the flap 38 and on the front edge
of the sidewall 16 the flap 40 which maintain spray and water vapor
within the unit. One or more squeegees such as 42, 44 and 46 are
connected at the ends thereof to the sidewalls 14 and 16 and extend
horizontally across the housing.
The squeegee water vacuum pickup unit A includes as a part of the
vacuum housing 47 the first upper flexible blade 48 affixed at its
inner edge to the outer edge 49 of the first upper wall 50 of the
vacuum unit. The upper wall 50 and the blade affixed thereto are
obliquely disposed to the wall 16 and the direction of travel of
the washer unit W. Further provided is the first lower flexible
blade 52 affixed at its inner edge to the outer edge 51 of the
first lower wall 54, the wall 54 being spaced from and parallel to
the wall 50. The outer end of the first upper wall 50 has formed
thereon the flange 56 which is secured to the wall 16, and the
outer end of the lower wall 54 has formed thereon the flange 58
which is secured to the wall 16. The upper wall 50 and the lower
wall 54 are connected at the rear edges thereof by the rear wall
60. The blades 48 and 52 form an acute angle relative to the wall
16 and the direction of travel of the unit W.
The numeral 62 designates a second upper flexible blade affixed at
its inner edge to the outer edge 64 of the second upper wall 66 of
the vacuum unit. The second upper wall 66 and the blade affixed
thereto are obliquely disposed to the wall 14. Further provided is
the second lower flexible blade 68 affixed at its inner edge to the
outer edge 70 of the second lower wall 71, the wall 66 being spaced
from and parallel to the wall 71. The outer end of the second upper
wall 66 has formed thereon the flange 72 which is secured to the
wall 14, and the outer end of the second lower wall 70 has formed
thereon the flange 74 which is secured to the wall 14.
The upper wall 66 and the lower wall 70 are connected at the rear
edges thereof by the rear wall 76. The blades 48 and 62 form a
first or upper following blade and the blades 52 and 68 form a
second or lead blade. The blades 48, 62, 52 and 68 together with
the walls 50, 51, 66 and 71 and the rear walls 60 and 76 form a
suction chamber. It will be seen that the inner end of the first
upper blade 50 abuts the second upper blade 62 adjacent the inner
end thereof and the inner end of the first lower blade 54 abuts the
second lower blade 68 adjacent the inner end thereof. The pair of
blades 50 and 54 together with the pair of blades 62 and 68,
respectively, form obtuse angles each obliquely positioned with
respect to the walls 14 and 16 which walls are parallel to the
direction of travel of the washer W over the window and wall
surfaces of a building. The disposition of the walls 50, 54, 66 and
70 together with blades 40, 54, 62 and 68 form a V-shaped mouth
squeegee opening 78 for the vacuum housing 47 with the apex of the
V extended in the direction of travel.
Secured to the top wall 35 of the washer W are the eyes 80 and 82
to which cable means are connected for moving the washer over the
window and wall surfaces of a building by means of a powered winch
or the like located on the top of the building. The washer may also
be moved over the window and wall surfaces by means of drive means
such as disclosed in application Ser. No. 553,351, in a vertical or
horizontal travel.
At the juncture of the rear walls 60 and 76 of the vacuum housing
47 is the suction port 84 connected to the housing 86 in which is
mounted a conventional vacuum motor which produces the suction and
vacuum between the blades of the vacuum housing 47 as referred to
hereinafter.
As the washer W is moved over the window and wall surfaces of a
building the brush 20 and fluid from nozzles 32 cleans the
surfaces. The horizontal squeegees 42-46 remove the greater portion
of the fluid from the surfaces. The unit A operates as a final and
complete squeegeeing and pickup of fluid and dirt from the windows
of the building. As the unit A is caused to move as indicated by
arrows in FIG. 1, cleaning fluid upon the windows is caused to
travel along each of the squeegee blades 52 and 68 as indicated by
the arrows in FIG. 1. The fluid moves to the outer ends of the
blades 52 and 68 when the suction existing at ends of the blades
draws in the fluid. The fluid is sucked through the vacuum housing
47 to and through the suction port 84 into the suction housing
having a conventional motor and suction fan from which it is
exhausted through outlet 88.
When the washer W moves over window surfaces, it encounters
horizontal crossbars separating sections of glass or wall or raised
or depressed portions such as joints. This poses a problem for a
washer with any form of a squeegee blade positioned normal to the
direction of travel of the washer unit, for such a blade meets the
crossbar, for example, full on with the blades moved over the
crossbar simultaneously throughout its length, for both crossbar
and blades are parallel. This not only produces a shock effect but
the vacuum pickup at the edges of the crossbars is not efficient
and dirt and some cleaning fluid remains upon the edges of the
crossbar. The dirt that remains may run down upon the window below
during the next fall of rain. With the blades disposed obliquely to
the line of travel, the same clean the surface. Further, with the
present invention the blades of the unit A contact and are rigidly
and progressively forced over the cross bar or raised portion of a
window at an angle. At the point of contact of the blades with the
crossbar 90 of the window, as an example, the blade edge portions
are distorted temporarily out of shape whereby the same can be
forced over the bar 90, FIG. 5 in particular. At the point of
distortion of the blade at the bar away from the window and bar
surfaces an opening "X" is formed, and due to the small restricted
size of the opening "X" a venturilike passage is formed at the edge
92 of the bar at "X" through which air is sucked into the housing
at an accelerated rate which very effectively draws in dirt and
water, which is at the edge 92 of the crossbar, progressively
across the bar as the unit A moves over the window and wall
surfaces. This is also true of the following blades 48 and 62 as
the same obliquely pass over a bar of a window or wall surface. In
FIG. 5 the blade 66 is in contact with the window W and bar 90
except as at "X." Due to the oblique disposition of the blades 52
and 68, water on a window being cleaned is squeegeed and caused to
travel outwardly and to the ends of the housing 47 as indicated by
arrows in FIG. 1 where it is picked up by suction as described.
FIGS. 6-8 illustrate a further embodiment of the invention in which
is shown the window washer Wa which is identical to washer W except
for the vacuum pickup unit B. The identical parts of the washer Wa
bear the same reference numeral as used relative to washer W but
accompanied by a lowercase letter a.
The squeegee water vacuum pickup unit B includes as a part of the
vacuum housing 96 the first upper flexible blade 98 affixed at its
inner edge to the outer edge of the first upper wall 100 of the
vacuum unit. The upper wall 100 and the blade thereon are obliquely
disposed to the wall 16a and the direction of travel of the washer
Wa. Further provided is the first lower flexible blade 102 affixed
at its inner edge to the outer edge of the first lower wall 104,
the wall 104 being spaced from and parallel to the wall 100. The
outer end of the first upper wall 100 has formed thereon the flange
106 which is secured to the wall 16a, and the outer end of the
lower wall 104 has formed thereon the flange 108 which is secured
to the wall 16a. The upper wall 106 and the lower wall 104 are
connected at the rear edges thereof by the rear wall 110. The
blades 98 and 102 form an acute angle relative to the wall 16a and
the direction of travel of the unit Wa.
The numeral 112 designates a second upper flexible blade affixed at
its inner edge to the outer edge of the second upper wall 114 of
the vacuum unit. The second upper wall 114 and the blade affixed
thereto are obliquely disposed to the wall 14a. Further provided is
the second lower flexible blade 116 affixed at its inner edge to
the outer edge of the second lower wall 118, the wall 114 being
spaced from and parallel to the wall 118. The outer end of the
second upper wall 114 has formed thereon the flanges 120 secured to
the wall 14a, and the outer end of the second lower wall 118 has
formed thereon the flange 122 secured to the wall 14a. The blades
98, 102, 112 and 116 together with the walls 100, 102, 118 and 114
and the rear walls 110 and 124 form a V-shaped mouth 125 and
suction chamber. The blades 100 and 112 form a following blade
while the blades 102 and 116 form a leading blade.
The upper wall 114 and the lower wall 118 are connected at the rear
edges thereof by the rear wall 124 which joins the rear wall 110 at
the vacuum exit or suction opening 126. The inner end of the lower
blades 102 and 116 together with the inner ends of the lower walls
104 and 118 are spaced to form a vacuum inlet aperture 128
therebetween. The inner end of the upper blade 98 overlaps the
inner end of the blade 112 and the inner end of the upper wall 100
joins the inner end of the upper wall 114 to effect a closure wall
for the housing 96. The pair of blades 98 and 102 together with the
pair of blades 112 and 116 form obtuse angles each obliquely
positioned with respects to the walls 14a and 16a which walls are
parallel to the direction of travel of the washer Wa over the
window and wall surfaces of a building.
At the juncture of the rear walls 110 and 124 whereat the vacuum
exit opening 126 is located, there is the conventional vacuum motor
mounted in the housing 132 which produces the suction and vacuum
between the blades of the vacuum housing 96.
The washer Wa operates in the manner the washer W operates as
described heretofore. The unit B operates as a final and complete
pickup of fluid from the windows of a building being cleaned. As
the unit B is caused to move downwardly as indicated by the arrow
in FIG. 6, cleaning fluid upon the window surface is caused to
travel upwardly along each of the squeegee blades 102 and 116 as
indicated by the arrows in FIG. 6. The fluid moves to the inner
ends of the blades and to the vacuum inlet aperture 128 and where
it is sucked into the suction housing 132 having a conventional
motor and suction fan from which it is exhausted through outlet
133. As the blades of unit B are caused to pass over window and
wall surfaces the oblique disposition of the same collects the
water on the surface and as the blades disposition of pass over a
raised crossbar the action is the same as heretofore described with
regard to the blades of housing 47 and specifically referred to in
FIG. 5.
In FIGS. 9, 10 and 11 is illustrated an additional embodiment of
the invention wherein the washer unit Wb is the same as W and Wa
except for the squeegee vacuum pickup unit C. The parts of the
washer Wb that are identical bear the same reference numeral but
accompanied by a lowercase letter b.
The squeegee water vacuum pickup unit C, includes as a part of the
vacuum housing 134 the upper flexible blade 136 affixed at its
inner edge to the outer edge of the upper wall 138 of the vacuum
unit. The upper wall 138 and the blade thereon are obliquely
disposed to the walls 14b and 16b and the direction of travel of
the washer unit Wb. Further provided is the lower flexible blade
140 affixed at its inner edge to the outer edge of the lower wall
142, the wall 142, being spaced from and parallel to the wall 138.
The outer end of the upper wall 138 has formed thereon the flange
44 which is secured to the wall 16b and the opposed outer end of
the wall is formed with the flange 46 which is secured to the wall
14b. The lower wall 142 has formed on one end thereof the flange
148 which is secured to the wall 16b and the other end formed with
the flange 150 which is secured to the wall 14b. The walls 138 and
142 are secured to a rear wall 144 which together with the blades
136 and 140 form a suction cavity.
The rear wall 144 has formed in one end thereof a first suction
port 146 which is connected to the suction conduit 148. The suction
conduit is connected to the housing 150 in which is mounted a
conventional vacuum motor which produces the suction and vacuum
between the blades of the vacuum housing 134. Formed in the other
end of the rear wall 144 is a second suction port 152 which is
connected to the suction conduit 148.
The unit C may be used to pick up and clean in one direction of
travel upon window surfaces as indicated by the arrow at the left
of FIG. 9 and in the opposed direction of travel as indicated by
the arrow at the right of FIG. 9. When the unit Wb is caused to
move in the direction of the arrow at the left of FIG. 9, cleaning
fluid is caused to travel along the lower blade 140 as indicated by
the arrows in FIG. 9. The fluid and dirt comes to outer end of the
blade 140 where the suction existing at the outer ends of the
blades draws the fluid into the housing 134 and into the suction
port 146 where it moves through the conduit 148 to the housing 150
from where it is exhausted out the outlet 154 by means of a
conventional motor and suction fan. With the blades 136 and 140
obliquely positioned to the line of travel of the washer Wb the
blades collect fluid on the surfaces to be washed and the same pick
up the fluid and water at a window crossbar such as 92 in the
manner hereinbefore described.
The unit C may be mounted in a washer unit such as Wb with the
brush and fluid nozzle units as illustrated in FIGS. 1-7 preceding
the unit relative to the line of travel of the washer. As a result,
the line of travel of the unit C would be in the direction of
travel indicated by the arrow on the right of FIG. 9, whereby fluid
and dirt would be caused to travel along the blade 136 to the outer
end of the blade and be sucked into the suction port 152 and thence
through the conduit 148, housing 150 and return line 154. When the
unit C is moved in the direction of the arrow at the left of FIG.
9, the suction port 152 is shut off by means of the butterfly valve
156 whereby only the suction port 146 is operated. Similarly when
the unit C is in a device for use in the opposite direction the
suction port 146 is closed off by means of the butterfly valve 158
with the butterfly valve 156 open. When the butterfly valve 158 is
open for operation of the device as in FIG. 9 the valve 156 is
closed.
* * * * *