U.S. patent number 3,740,933 [Application Number 05/150,367] was granted by the patent office on 1973-06-26 for vacuum trash collector.
Invention is credited to John R. Hollowell.
United States Patent |
3,740,933 |
Hollowell |
June 26, 1973 |
VACUUM TRASH COLLECTOR
Abstract
A vacuum trash collector having a device for restraining the
movement of a plastic bag used therein. A rigid cylindrical liner
is slipped inside the bag and this assembly then placed in the
trash collecting bin. During operation, the liner will prevent the
plastic bag from collapsing and blocking air flow. When the bin is
filled, the liner may be slipped out of the bag and re-used. In one
embodiment, the liner has an annular deflecting lip at one end.
Inventors: |
Hollowell; John R. (Dearborn,
MI) |
Family
ID: |
22534202 |
Appl.
No.: |
05/150,367 |
Filed: |
June 7, 1971 |
Current U.S.
Class: |
55/429; 15/327.6;
55/DIG.3; 55/467; 15/352; 55/435 |
Current CPC
Class: |
E01H
1/0836 (20130101); A47L 9/1418 (20130101); Y10S
55/03 (20130101) |
Current International
Class: |
A47L
9/10 (20060101); E01H 1/00 (20060101); E01H
1/08 (20060101); B01d 045/18 () |
Field of
Search: |
;55/429,337,467,471,472,473,459,379 ;15/352,353,347,327 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Miles; Tim R.
Assistant Examiner: Chiesa; Richard L.
Claims
I claim:
1. In combination, a vacuum trash collector comprising a bin, a lid
surmounting said bin, a collection inlet leading into said bin, a
vacuum blower having an inlet exposed to the interior of the bin
and an outlet leading to the atmosphere, a disposable bag lining
the interior of said bin and subjected at its interior to the
vacuum created at the inlet of said blower so that the bag would
ordinarily have a tendency to be drawn against and block said
inlet, and a rigid cylindrical liner having a diameter slightly
less than that of said bag, said liner being disposed within said
bag to prevent the bag from being drawn up against said blower
inlet, the liner being manually withdrawable from said bag after it
has been filled.
2. The combination according to claim 1, said blower inlet being
disposed above said bin, the top of said liner being further
provided with a frustoconical annular lip extending downwardly and
into the liner so that debris will be trapped by said lip and
prevented from entering the blower inlet.
3. The combination according to claim 1, said bag being impervious.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to vacuum trash collectors used for
sweepings, leaves or other debris. These collectors are various
types, but have in common a cylindrical bin connected to a pick-up
hose and having a vacuum blower at its upper end. It is common
practice to line the bin with a plastic bag before use so that the
bag may be removed and sealed after it is filled, for efficient
disposal. However, the air being drawn out of the bin at the top
will cause the plastic bag to collapse and be drawn against the
outlet, thus blocking flow and preventing proper operation.
2. Description of the Prior Art
A search has revealed no prior art pertaining to a plastic bag
restrainer in a vacuum cleaning device in which air is circulated
through a bag to collect trash. Goodrich U.S. Pat. No. 576,782 and
Kaiser U.S. Pat. No. 791,472 are typical of the patents discovered,
which pertain to construction for maintaining the form of bags when
they are hand filled.
BRIEF SUMMARY OF THE INVENTION
According to the invention, a rigid cylindrical liner is provided,
in one embodiment having an annular deflecting lip at one end. In
use, the liner is placed inside the bag (with the deflecting lip,
if present, at the outer end) and the assembly then placed inside
the bin. During operation, the liner will prevent collapse of the
bag and insure efficient trash collection. When the container is
filled, the liner may be slipped out of the bag and the latter then
removed from the bin and sealed. The liner may then be re-used.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a vacuum trash collector
incorporating the invention, parts being broken away.
FIG. 2 is an enlarged cross-sectional view in elevation taken along
the line 2--2 of FIG. 1, parts being broken away.
FIG. 3 is a side elevational view, partially sectioned, of the
cylindrical liner.
FIG. 4 is a side elevational view showing the liner partially
assembled into a plastic bag.
FIG. 5 is a side elevational view showing the insertion of the
liner and bag into the bin, and
FIG. 6 is a side elevational view, partly sectioned, showing
another embodiment of the invention in which the liner has a
deflecting rim and is used with another type of mobile trash
collector.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A vacuum trash collector is generally indicated at 11. The
collector has a cylindrical bin 12 with a bottom 13 and a rimmed
top 14 on which rests a lid 15. The lid is securable to bin 12 by
clamps 16 so as to seal the outer end 17 of a flexible bag 18
between the cover and lip 14. Bag 18 is of a size sufficient to
line the entire bin. Cover 15 is further provided with an inlet
connection 19 having a flexible hose 21 leading to a nozzle (not
shown) for picking up trash such as sweepings or other debirs. A
vacuum blower 22 is secured to the underside of lid 15 and has an
inlet 23 extending downwardly into bin 12 and an outlet 24
extending upwardly through the cover. Blower 22 is electrically
operated by connection to a power source through a cord 25 so as to
draw air from bin 12 and blow it out through outlet 24. The result
will be that debris-laden air will be drawn through hose 21 into
container 19 and will settle therein. It should be observed that
unit 11 is merely one of a number of different types of vacuum
trash collectors on the market, some of them having different air
flow arrangements than that shown. The principles of the present
invention are applicable to these other types.
It will be noted that the vacuum created by blower 22 would
ordinarily have a tendency to cause bag 18 to collapse, that is, to
be drawn upwardly and inwardly and due to its flexible nature to at
least partially block inlet 23. This would defeat the purpose of
the unit since it would greatly reduce or completely stop the
suction ability at hose 21.
According to the present invention, a rigid cylindrical liner 26 is
provided, this liner being only slightly less than the full bag
diameter in its expanded condition. Liner 26 may be fabricated of
any of a number of suitable materials such as plastic or cardboard,
formed as a cylinder and secured longitudinally at 27. The height
of liner 26 is substantially the same as or slightly less than the
height of bin 12 from bottom 13 to lid 15.
In use, liner 26 will first be placed inside a plastic bag 18, for
example by inverting the bag as shown in FIG. 4 and slipping it
over the liner. The bag will then be placed bottom first in bin 12
as shown in FIG. 5. The outer edge 17 of bag 18 will be laid over
rim 14 of the bin and lid 15 placed thereon and clamped so that the
lid is sealed to the bin.
Blower 22 will then be operated while the nozzle attached to hose
21 is used to pick up the debris. Air will be drawn from bag 18
through inlet 23, exiting through outlet 24. It will be observed
that, were it not for liner 26, the bottom 28 and the sides of bag
18 (FIG. 2) would be drawn against inlet 23, blocking or at least
partially obstructing the air flow and rendering the device
ineffective, if not resulting in motor burnout.
The presence of liner 26, however, will prevent this from
happening. The debris will be drawn into entrance 19 and will
collect in the bag. After it is filled, blower 22 will be shut off
and lid 15 removed. Liner 26 may then be easily slipped out of the
bag by grasping it on opposite sides around its top edge. The
debris in bag 18 will, of course, hold it down while the liner is
being extracted. The liner may then be placed aside and bag 18
removed from the bin. Liner 26 is then available for use with
another bag.
FIG. 6 shows another embodiment of the invention in which the liner
is especially adapted for mobile trash collectors of the type
having a blower inlet above the top of the cylindrical bin. Such a
collector is shown, for example, in my co-pending application, Ser.
No. 152,223, filed June 11, 1971. The unit is generally indicated
at 101 and has a U-shaped frame 102 mountable on a post 103 of a
vehicle (not shown) by means of a socket 104. A bin 105 is rockably
mounted at 106 between the arms of frame 102, and a lid 107 is
pivoted at 108 to a bracket 109 secured to socket 104. The lid has
an inlet 111 connected to a flexible hose 112 the outer end of
which carries a pickup nozzle (not shown). Inlet 111 leads
tangentially downwardly into lid 107 so as to create a swirling
effect, separating the debris by centrifugal force.
A vacuum blower 113 is mounted on lid 107, the top of which has an
opening 114 for inflow of air into the blower. The blower fan 115
is on a shaft 116 extending downwardly through opening 114 and
carrying a perforated dish-shaped baffle 117 to prevent debris from
entering the blower. Blower 113 has an outlet 118 leading to the
atmosphere.
Ordinarily, a plastic bag 119 mounted in bin 105 would have a
tendency to be drawn upwardly due to the vacuum created by blower
113. This might tend to block passage of air through rotating
baffle 117. According to the present invention, a rigid cylindrical
liner 121 is provided which fits within bag 119. The bag and liner
could be assembled in the manner described previously, and then
inserted in bin 105 while the latter is in its dot-dash line
position. The bin would then be swung back into its full-line
position and lid 107 clamped thereto. The liner would then prevent
the bag from being drawn upwardly, insuring efficient
operation.
The embodiment of the invention shown in FIG. 6 is further provided
with an annular frustoconical lip 122 secured to its upper edge and
extending inwardly therefrom. The purpose of this baffle or guard
is to entrap debris which descends into liner 121, thus preventing
it from being drawn upwardly toward baffle 117.
In operation, liner 121 will be withdrawn from bag 119 after it is
filled, in the same manner as previously. This would be done after
unclamping and lifting lid 107, and swinging bin 105 to its
dot-dash line position. Bag 119 may then be withdrawn from the bin,
and liner 121 used for additional bags.
* * * * *