U.S. patent number 3,667,611 [Application Number 05/010,385] was granted by the patent office on 1972-06-06 for swimming pool leaf trap.
Invention is credited to Andrew L. Pansini.
United States Patent |
3,667,611 |
Pansini |
June 6, 1972 |
SWIMMING POOL LEAF TRAP
Abstract
A portable leaf trap for use with swimming pools comprising a
dome-like housing, perforate means affixed to the housing, a
flexible base member extending outwardly from the housing, and lift
means. An opening is provided in the side of the housing to provide
communication between the outside of the housing and an interior
defined by the perforate means and the housing inner surface. The
leaf trap is adapted to be positioned over a swimming pool drain
upon the floor of the pool with leaves and the like entering the
trap interior through said opening. The lifting element is affixed
to the perforate means in the vicinity of said opening and offset
with respect to the center of gravity of the trap. When an upwardly
directed force is applied to the lifting element, the leaf trap
tends to pivot therearound thus trapping the leaves and the like
within the interior at a location remote from said opening.
Inventors: |
Pansini; Andrew L. (San Rafael,
CA) |
Family
ID: |
21745524 |
Appl.
No.: |
05/010,385 |
Filed: |
February 11, 1970 |
Current U.S.
Class: |
210/244;
210/167.16; 210/163; 210/166; 210/473 |
Current CPC
Class: |
E04H
4/1236 (20130101) |
Current International
Class: |
E04H
4/12 (20060101); E04H 4/00 (20060101); E03f
005/04 (); B01d 035/28 () |
Field of
Search: |
;210/232,244,464,465,463,497,473,166,163 ;15/257.3 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Zaharna; Samih N.
Assistant Examiner: Calvetti; Frederick F.
Claims
I claim as my invention:
1. A portable leaf trap for use with a swimming pool having a drain
and a floor, said trap comprising an integral dome-like housing
having a peripheral rim adapted to be disposed at substantially the
level of the pool floor in surrounding relation to said drain, said
housing having a substantially concavo-convex imperforate external
surface which is smoothly contoured, whereby a floor cleaning hose
of a swimming pool cleaner of the random movement type will not be
caught or hung-up by said leaf trap, an opening formed in said
housing for the entry of leaves, said opening having a lower end
and an upper end, said lower end being located substantially at the
level of said rim, said upper end being located a substantial
distance below the top of said housing, said opening having a width
at its lower end which is substantially greater than the height of
said opening, and perforate means attached to the housing forming a
bottom wall therefor and defining therewith a closed interior
adapted to retain therein the leaves which enter through said
opening.
2. The portable leaf trap of claim 1 further comprising a lifting
element affixed to the trap at a location whereby access to said
lifting element may readily be had through said housing
opening.
3. The portable leaf trap of claim 2 wherein said lifting element
is positioned offset with respect to the center of gravity of said
leaf trap whereby upwardly directed force exerted on said lifting
element will cause said leaf trap to pivot about said lifting
element under the influence of gravity to cause leaves and the like
within said interior to accumulate at a location within said
interior remote from said opening.
4. The portable leaf trap of claim 3 wherein said lifting element
comprises an inwardly extending hook secured to said perforate
means in registry with said opening.
Description
BACKGROUND OF THE INVENTION
The present invention relates to equipment for the maintenance of
swimming pools, and more particularly, to a portable trap for the
removal of leaves and the like from said pools.
In the cleaning of swimming pools increasing use has been made of
automatic swimming pool cleaners which incorporate mechanisms
adapted to travel in a random manner over the bottom and side walls
of the pool. Examples of such devices may be seen with reference to
my prior U.S. Pat. Nos. 3,032,044 of May 1, 1962, and 3,392,738 of
July 16, 1968. In these devices random movement and/or cleaning are
effected by means of one of more water discharge nozzles which are
operatively associated with flexible conduit means. For the proper
operation of these devices it is quite important that no foreign
obstructions be provided in the swimming pool which would tend to
catch them, thereby tending to impede their random movement or halt
such movement altogether.
The above-noted prior art cleaning devices are adapted to remove
accumulated scum and dirt from the side walls and bottom of a pool,
this material being subsequently removed from the pool by suitable
drain means. Quite often, a pool will also contain additional
relatively large matter such as leaves and the like which may clog
the pool drain. To prevent this traps have been devised for
straining out this latter material from the water being drained and
trapping same for subsequent removal. Such leaf trap arrangements,
however, do not readily lend themselves to random movement pool
cleaners since they are often large and complex in construction,
tending to impede or halt movement of such cleaners.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to provide a
portable trap for the pickup and retention of leaves and the like
from the floors of swimming pools which is simple in construction
and defines a configuration readily adapting it for use in a
swimming pool wherein a random movement cleaner is being
employed.
It is a further object of this invention to provide a device of the
character described, which employs no moving parts and defines a
smooth, fixed outer surface over which random movement pool
cleaners may pass in an unobstructed manner.
DESCRIPTION OF THE DRAWINGS
The above-noted and other objects of this invention will be
understood from the following description taken with reference to
the drawings wherein:
FIG. 1 is a perspective view of a portable leaf trap constructed in
accordance with the present invention.
FIG. 2 is a plan view of the portable leaf trap of FIG. 1.
FIG. 3 is a cross sectional view taken along the line 3--3 of FIG.
2.
FIG. 4 is a cross sectional side elevational view illustrating the
portable leaf trap constructed in accordance with the teachings of
the present invention being retrieved from the pool floor.
DESCRIPTION OF THE ILLUSTRATED EMBODIMENT
Referring now to the drawings, the portable leaf trap constructed
in accordance with the present invention is generally designated by
the numeral 10. As shown in FIGS. 1-3, the leaf trap is in
operating position upon a swimming pool floor 12 centered over the
inlet 14 of pool drain line 16.
The leaf trap includes a dome-like housing 18 having an inner
surface 20 and a rim 22. Dome-like housing 18 may be fabricated
from any suitably rigid material; however, it is preferably formed
of a transparent material such as plastic for purposes which will
be brought out in greater detail below. Perforate means in the form
of a screen 24 is affixed to said housing in proximity to rim 22 in
any desired manner such as by means of water insoluble adhesives or
conventional thermal bonding techniques. The screen 24 is circular
in shape, conforming to the configuration of housing 18 so that the
screen and housing inner surface 20 define an interior. In the
illustrated embodiment screen 24 is illustrated as being
constructed of plastic material (however, it should be understood
that any other foraminous material such as wire mesh may be
utilized in the construction thereof). The holes defined by screen
24 are large enough to permit the free flow of water therethrough
while at the same time being too small to allow the passage
therethrough of relatively large objects such as leaves or the
like.
A base member 26 extends radially outwardly from housing rim 22 in
the manner illustrated. The base member comprises a continuous,
thin, flexible element which is disposed completely around the rim
and by virtue of its flexibility is adapted to conform to the
surface configuration of the swimming pool floor 12. In the
illustrated embodiment base member 26 is constructed of a unitary
piece of plastic material along with screen 24, said screen and
base member being interconnected by means of an integral shoulder
28. Shoulder 28, in addition to providing relative placement
between screen 24 and base member 26, lies in communication with
inner surface 20 of housing 18 and thus provides an additional
location whereby bonding with housing 18 as by means of adhesives,
etc., may be effected.
An opening 30 is formed in the side of housing 18 to establish
communication between the interior defined by screen 24 and housing
inner surface 20 and the outside of said housing. As drain line 16
is opened for the discharge of water from the pool through suction
means (not shown) in communication with said drain line, a water
current is caused to flow through opening 30 into the interior
defined by screen 24 and inner surface 20 and thence through the
perforations formed by screen 24 and into the drain line. Leaves or
other debris will be swept along by the water current and trapped
within the leaf trap interior in an obvious manner. Since base
member 26 is in continuous annular abutment with pool floor 12,
substantially all water being drained from the pool will have to
pass through the opening 30. In the event the leaf trap constructed
in accordance with the teachings of the present invention is
employed with a swimming pool cleaner of the random movement type
referred to above, such cleaner during the operation thereof will
have driven the leaves on the pool floor into the immediate
vicinity of the trap thereby increasing the efficiency of its leaf
pickup operation. A portion of such a swimming pool cleaner is
illustrated by means of the dotted lines in FIG. 3. It should be
noted that the leaf trap of the present invention presents in
entirety a smooth external surface over which the cleaning device
may move freely. As previously stated, freedom of movement is
necessary for the proper operation of random motion pool
cleaners.
The flow of the water current through the leaf trap will tend to
maintain the trap in position upon the pool floor. However, it may
be desirable to provide additional means for maintaining the trap
in position. A preferred approach for accomplishing this may most
readily be seen with reference to FIG. 3 wherein ballast retention
means in the form of an inverted cup-shaped element 32 is
illustrated as being secured to the interior top of dome-like
housing 18. Element 32, which is preferably constructed of a
yieldable plastic material, is adapted to be affixed to housing 18
by having the rim thereof snapped into an annular shoulder 34
formed at the top of the housing as shown. Prior to being secured
to the housing, however, cup-shaped element 32 will be filled with
a suitable ballast material such as lead shot, etc., (not shown) so
that additional weight will be imparted to the leaf trap
substantially along the center of gravity thereof.
Affixed to screen 24 along the edge thereof and in registry with
opening 30 is a lifting element in the form of a hook 36. After
completion of the aforedescribed leaf pickup operation, a pole 38
is positioned with its pole hook 40 in hook 36, as in FIG. 4, and
the pole is manipulated to exert upwardly directed force on hook 36
to lift the trap from its position over the pool drain line 16. The
opening 30 provides free access to the hook 36. As the leaf trap 10
is lifted from the swimming pool floor, the trap, by virtue of the
fact that hook 36 is positioned off center with respect to the
center of gravity thereof, pivots about the hook so that opening 30
is disposed in an upwardly direction. Leaves and other debris
contained within the interior of the trap tend to fall under the
influence of gravity and accumulate within the trap interior in the
side of the trap opposite opening 30. Since hook 36 projects
inwardly toward the center of the trap interior, the pivotal
movement of the trap will insure that hook 36 and pole hook 40
remain in engagement during the lifting operation. In the above
manner, leaf trap 10 may readily be transported out of the pool
without danger that the trap will fall off the pole 38 or that
leaves and other debris within the trap interior will fall out of
opening 30.
Although only one embodiment of apparatus constructed in accordance
with the teachings of the present invention has been illustrated
and described, it will be apparent to those skilled in the art that
various changes and modifications may be made therein without
departing from the spirit of the invention or from the scope of the
appended claims. For example, the bottom of the trap may be solid
over about 25 percent of its total surface in the vicinity of
aperture 30 to encourage leaves or the like to move to the rear of
the trap.
* * * * *