U.S. patent number 3,926,667 [Application Number 05/431,023] was granted by the patent office on 1975-12-16 for pool cleaning apparatus.
This patent grant is currently assigned to Airwick Industries, Inc.. Invention is credited to Michael C. Gibellina.
United States Patent |
3,926,667 |
Gibellina |
December 16, 1975 |
Pool cleaning apparatus
Abstract
A rotatable pool cleaning head is continuously biased toward the
edges of a swimming pool by a first water jet system and propelled
along the edge by a second water jet system. Self compensatory
means are provided to angularly reorient the biasing of the water
jet systems to accommodate changes in the curvature of the pool
perimeter as the cleaning head travels therealong.
Inventors: |
Gibellina; Michael C.
(Scottsdale, AZ) |
Assignee: |
Airwick Industries, Inc.
(Carlstadt, NJ)
|
Family
ID: |
23710109 |
Appl.
No.: |
05/431,023 |
Filed: |
January 7, 1974 |
Current U.S.
Class: |
134/167R;
4/490 |
Current CPC
Class: |
E04H
4/1681 (20130101) |
Current International
Class: |
E04H
4/16 (20060101); E04H 4/00 (20060101); B08B
009/08 () |
Field of
Search: |
;4/172.15,172.16,172.17
;134/167R,168R ;15/1.7 ;210/169 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Bleutge; Robert L.
Attorney, Agent or Firm: Curtis, Morris & Safford
Claims
I claim:
1. A pool cleaning apparatus for washing the bottom and side walls
of a pool, which pool includes a water supply outlet disposed in
one of the side walls, said apparatus comprising in
combination:
a. a cleaning head movable about the surface of water within the
pool, said cleaning head including:
1. a water manifold for receiving and distributing a flow of water;
and
2. a dome freely rotatably supported on said manifold, said dome
having a vertical axis of rotation and being rotated on said axis
with respect to the manifold by contact with the side wall as the
cleaning head moves along the side wall;
b. hose means operatively connected to the water supply outlet for
supplying a flow of water to said water manifold; said hose means
including means for connecting the hose to the manifold and for
allowing relative movement between the hose and manifold at least
in a horizontal direction;
c. power jet means extending from said hose means upstream of said
connecting means for urging rotation of said cleaning head in a
first direction about the vertical axis;
d. leading jet means extending from said manifold downstream of
said connecting means for urging rotation of said cleaning head in
a second direction about the vertical axis, said leading jet means,
in combination with said power jet means, propelling said cleaning
head forwardly and laterally; said leading and power jet means
being normally positioned at a predetermined angular relation to
each other, which angular relation may be varied during operation
of the apparatus, should the cleaning head become stalled against
the side wall, as the power jet causes said hose to move
horizontally about said connecting means, thereby to change the
angle of the effective repulsive force applied to the cleaning head
by said leading and power jets and unstall the cleaning head;
e. a flotation ring disposed about said dome for supporting at
least a part of said dome above the surface of the water, said
flotation ring including an annular band extending radially
outwardly from said dome below the surface of the water such that
only said annular band contacts the side wall of the pool when said
cleaning head is adjacent the side wall, said dome being rotated by
the friction existing between said annular band and the side wall
due to the forward and lateral movement of said cleaning head;
f. water jet means extending radially from said dome and rotating
with said dome for directing a flow of water against the side wall
above the water level of the pool to wash the unsubmerged part of
the side wall; and
g. at least one snake extending from said hose means for randomly
spraying a flow of water against the submerged side walls and
bottom of the pool; whereby said power jet means and said leading
jet means cooperate to prevent stalling of the cleaning head in a
fixed position along the side wall and propel said cleaning head
about the perimeter of the pool while said water jet means and said
snake wash the unsubmerged side walls and the bottom of the
pool.
2. The apparatus as set forth in claim 1 including at least one
float coupler attached to said hose means for supporting said hose
means in proximity to the water surface of the pool.
3. The apparatus as set forth in claim 2 wherein said hose means
includes a plurality of serially connected lengths of hose and a
swivel coupler disposed intermediate adjacent lengths of hose to
prevent snarling of said hose means.
4. The apparatus as set forth in claim 3 wherein a first one of
said lengths of hose connected to said water supply outlet is
sinkable and a second one of said lengths of hose connected to said
first length of hose is floatable; whereby, said first and second
lengths of hose will define a downwardly directed loop from the
water supply outlet to preclude said cleaning head from becoming
entangled with said hose means.
5. The apparatus as set forth in claim 1 where said hose means
includes rigid control arm means operatively connected to said
connecting means and extending upstream therefrom for supporting
said power jet means.
6. The apparatus as set forth in claim 5 wherein said connecting
means comprises a swivel connection affording limited angular
movement in the horizontal plane to said control arm means;
whereby, the reaction force exerted by said power jet means is
angularly redirected when said cleaning head encounters an
obstruction otherwise tending to limit further movement of said
cleaning head.
7. The apparatus as set forth in claim 6 wherein said power jet is
directed at an angle of 135.degree. with respect to said control
arm means.
8. The apparatus as set forth in claim 2 wherein said power jet
means is disposed within said float coupler.
9. The apparatus as set forth in claim 1 including a rotatable disc
centered upon the vertical axis of said cleaning head and disposed
below said water manifold to engage the side wall of the pool when
said annular band encounters an indentation in the adjacent section
of the side wall.
10. The apparatus as set forth in claim 1 wherein said connecting
means includes a flexible length of hose connected between said
manifold and said power jet whereby said flexible length of hose
will tend to angularly redirect the reaction force generated by
said power jet means upon said cleaning head to urge said cleaning
head around obstructions in its path.
11. The apparatus as set forth in claim 10 wherein said power jet
means is directed at an angle of 135.degree. with respect to said
flexible hose.
12. A swimming pool cleaning apparatus for washing the bottom and
side walls of a pool that includes a water supply outlet disposed
in one of its side walls, said apparatus comprising, a buoyant
cleaning head movable about the surface of water within the pool
and including a water manifold for receiving and distributing a
flow of water; hose means operatively connectable to the water
supply outlet of the pool for supplying a flow of water under
pressure to said water manifold, said hose means including means
for connecting the hose in fluid communication to the manifold and
means for allowing relative horizontal movement between the hose
and manifold; first jet means on said hose, upstream of said means
for allowing horizontal movement, for forming a first water jet
from water flowing in said hose; second jet means operatively
associated with said manifold for forming a second jet of water
from water under pressure in said manifold, said first and second
jets being normally located in a predetermined angular relation to
each other to produce a combined reaction force propelling said
cleaning head forwardly along and laterally against the sidewalls
of the pool; said means for allowing horizontal movement allowing
the angular relation of said jet means to be varied under the
influence of said first jet means should forward movement of the
cleaning head become stalled, thereby to change the angle at which
the combined reaction force is applied to the cleaning head and
unstall the head.
13. The apparatus as defined in claim 12 wherein said means for
allowing horizontal movement comprises a swivel; means for limiting
movement of said hose on said swivel; and wherein said hose
includes a rigid control arm operatively connected between said
swivel and said first jet means.
14. The apparatus as defined in claim 13 wherein said first jet
means is mounted on and supported by said control arm.
15. The apparatus as defined in claim 12 wherein said means for
allowing horizontal movement comprises a flexible length of hose
connected between said connecting means and said first jet
means.
16. The apparatus as defined in claim 15 wherein said connecting
means has an aperture formed therein opening in substantially the
same direction as said second jet means, to form a third jet of
water cooperating with said second jet means to propel said
cleaning head.
17. The apparatus as defined in claim 12 wherein said cleaning head
includes a dome rotatably mounted on said manifold and water jet
means extending radially from said dome; and means for providing
fluid communication between said manifold and said water jet means
while allowing rotary movement of the water jet means thereby to
produce a jet of water directed against the sidewall of the
pool.
18. The apparatus as defined in claim 12 including at least one
snake hose section connected in fluid communication to said hose
and extending therefrom to a free end for producing a randomly
moving spray flow of water against the submerted side walls and
bottom of the pool.
Description
The present invention relates to pool cleaning devices, and, more
particularly, to pool cleaning devices traveling along and
continuously biased toward the edge of a pool.
The prior art is replete with various devices for agitating the
water adjacent the bottom and sides of a pool to maintain foreign
particulate matter in a continuous state of suspension. Some of
these devices, such that shown in U.S. Pat. No. 3,291,145,
incorporate a water driven timing mechanism for periodically
emitting a water flow through selected nozzles. The variable water
flow from the nozzles tends to cause the device to travel in a
prescribed path about a pool. A plurality of other devices,
represented by the following U.S. Pat. Nos. 3,032,044, 3,139,099,
3,170,180, 3,265,079 and 3,289,216, teach various pool cleaning
devices suspended from and movable about an arm extending from the
side of the pool. U.S. Pat. No. 3,580,511, illustrates a
transportable manually operated device for directing a spray of
water toward the sides of a pool. U.S. Pat. No. 3,718,148,
describing a device invented by the present inventor, teaches a
pool cleaning device for ejecting a spray of water from nozzles
tangential to the cleaning head. The ejected water causes the
cleaning head to rotate and simultaneously wash the walls of the
pool. Other water nozzles bias the cleaning head toward the pool
walls.
All of the above devices operate more or less successfully but each
of them have certain drawbacks or disadvantages. One of the primary
disadvantages of the prior art devices resides in the complexity
and associated expense of the various components. As the market
within which these devices are sold is highly competitive, it
becomes mandatory to simplify each of the elements of any apparatus
to the greatest extend possible and thereby reduce the component
cost. Further, non-clogging, easily maintainable and preferably
interchangeable components must be used to provide a high degree of
reliability and low maintainance costs.
Further, pool cleaning devices must be capable of continuously
agitating the water adjacent 100 percent of the submerged surface
of the pool and they must be capable of adequately and effectively
cleaning the exposed sides of the pool to prevent the formation of
evaporation rings and deposition of surface oil and debris.
It is therefore a primary object of the present invention to
provide a pool cleaning apparatus for scrubbing the submerged and
unsubmerged sides of a pool.
Another object of the present invention is to provide a rotatable
pool cleaning head biased into contact with the sides of a pool by
a first set of water jets and impart a lateral motion to the
cleaning head by a second set of water jets to cause the cleaning
head to roll along the pool perimeter.
A further object of the present invention is to provide a means for
maintaining a submerged contact between a pool cleaning head and
the wall of a pool.
A still further object of the present invention is to provide a
water feed line for a pool cleaning apparatus, which line does not
entangle as the pool cleaning apparatus circumnavigates the
pool.
A yet further object of the present invention is to provide pool
cleaning apparatus which may be configured to rotate in either a
clockwise or a counter clockwise direction.
A still further object of the present invention is to provide an
inexpensive pool cleaning apparatus.
These and other objects of the present invention will become
apparent to those skilled in the art as the description thereof
proceeds.
The present invention may be described with greater clarity and
specificity with reference to the following drawings in which:
FIG. 1 illustrates the components of the present invention disposed
within a swimming pool.
FIG. 2 depicts the swivel connection intermediate the pool cleaning
apparatus and the water feed line.
FIG. 3 illustrates an exploded view of the pool cleaning head.
FIG. 4 illustrates a cross-sectional view of the pool cleaning head
manifold taken along lines 4--4, as shown in FIG. 3.
FIG. 5 illustrates a modification of the apparatus interconnecting
the pool cleaning apparatus and the water feed line.
FIG. 6 illustrates a modification of the power jet for driving the
pool cleaning apparatus.
FIG. 7 illustrates a cross-sectional view of the power jet taken
along lines 7--7, as shown in FIG. 6.
Referring to FIG. 1, there is shown a cross-sectional view of a
swimming pool 1 filled with water, as indicated by water level 7,
and including the pool cleaning apparatus of the present invention.
The pool 1 includes a bottom 2 having an essentially horizontal
section and a sloping section, the latter terminating in a
plurality of steps 4. The side walls 3 are terminated by a combing
5 contiguous with the surrounding pool deck. A tiled surface 6 is
disposed in proximity to the water level 7 and a water supply
outlet 10 is located in one of the side walls 3 in general
proximity to the intended water level.
A water feed line 9 is attached to water supply outlet 10 to convey
a flow of water to the various jets and outlets of the present
invention. Water feed line 9 includes a sinkable water hose 11
extending from water supply outlet 10. The sinkable hose 11 may be
bisected with a swivel coupler 12 inserted therebetween. The
coupler serves to relieve any twisting strains imposed upon hoses
11. One end of a pair of floating hoses 13, interconnected by
another swivel coupler 25, is attached to sinkable hose 11 by
further swivel coupler 26. The other end of floating hoses 13 is
connected to a float coupler 14. With the above described
configuration of the water feed line 9, a downwardly extending loop
will be maintained in the line in proximity to the water supply
outlet 10. The downwardly extending loop will prevent the hose from
entangling as the latter moves about the pool.
A float 15 extends upwardly from float coupler 14 and maintains the
latter at a predetermined distance beneath the water level 7. A
"snake" or pool cleaning hose 17 is suspended from float coupler 14
by means of an elbow 16. A stream of water is ejected from the
extremity of hose 17 and causes the lower part of the hose to
randomly traverse the surfaces of bottom 2 and side walls 3 to
randomly direct a stream of water against the adjacent surfaces.
The ejected water tends to agitate particulate matter which has
settled on the bottom and side walls and retains the particulate
matter in suspension.
A second float coupler 28 is connected to the first float coupler
14 by means of hoses 18 connected to one another by a further
swivel coupler 27. Floats 19 may be added to hoses 18 to prevent
the hoses from sinking and thereby drawing the two float couplers
toward one another. If hoses 18 are floation hoses, floats 19 are
not needed.
The second float coupler 28 includes a float 48 to maintain the
float coupler at a predetermined distance beneath water level 7. A
further hose 17' depends from float coupler 28 through another
elbow 16'. The further hose 17' conveys a stream of water adjacent
the surfaces of bottom 2 and side walls 3 to maintain the
surrounding particulate matter in suspension.
Additional float couplers may be included without departing from
the teachings of the present invention. The requirement for further
float couplers is essentially predicated upon the hoses 17 and 17'
being capable of reaching the whole surface of the bottom 2 and
side walls 3 when the float couplers are in proximity to the side
walls.
The second float coupler 28 is connected to cleaning head 29 by a
control arm 20, a coupler 23, a T fitting 21, a control arm 24, an
elbow 30 and a swivel 31. The leg of T fitting 21 extends upwardly
and supports a power jet 22. The power jet is set at an angle of
45.degree. with respect to control arm 20 and directed away from
cleaning head 29. In this manner, the reaction force created by the
water flowing out of power jet 22 will tend to cause the attached
assembly to move in a direction opposite to that of the ejected
water. Swivel 31 extends downwardly from cleaning head 29
off-center of the vertical axis of the cleaning head. Thereby, the
reaction force acting upon swivel 31 will tend to cause the
cleaning head to rotate about the swivel. The angular displacement
of the cleaning head is limited by elbow 30 contacting one of a
pair of stops 32 extending downwardly from cleaning head 29 on
either side of the elbow.
A leading jet 37 is connected to a manifold disposed interior to
dome 33 of cleaning head 29 through a coupler 36 at a location
generally diametrically opposed to swivel 31. The leading jet is
generally oriented in the same direction as power jet 22 but
selectively angularly non-aligned therewith. A part of the water
flowing into the manifold through swivel 31 is discharged through
leading jet 37. The reaction force created by the ejected water
from the leading jet will tend to cause cleaning head 29 to rotate
in a direction opposite to that induced by power jet 22.
A jet 35 extends radially from dome 33 and is interconnected to the
manifold within the dome. Thereby, a part of the water within the
manifold is ejected through water jet 35. Water jet 35 is
positioned above water level 7 such that the water ejected
therefrom will strike and wash the tiles 6 of side wall 3 extending
above the water level 7.
A floation ring 34, having a radially extending annular band about
its lower edge, is disposed about dome 33 and extends outwardly
therefrom. The buoyancy of the floation ring is established such
that the annular band and below the water level 7. Any contact
between cleaning head 29 and side wall be by means of the annular
band and below the water level. Thereby, the cleaning head will not
scrape, rub or otherwise leave any marks upon the side wall 3 above
the water level. Further, surface oils and debris will not be
transfered to the exposed tiles 6.
Through experimentation it has been learned that the action of the
cleaning head 29 creates a partial vacuum within dome 33, which
vacuum causes the cleaning head to float lower than optimum. To
relieve the vacuum, a plurality of holes 52 (see FIG. 3) are formed
in the top surface of dome 33.
Where the steps 4 extend beyond the side wall 3 of the pool at a
depth insufficient to clear the apparatus depending from cleaning
head 29, a rotatable disc 38 may be used. Disc 38 is connected to
cleaning head 29 by means of a pipe 40 extending from the manifold
to a depth sufficient to clear the adjacent apparatus. The diameter
of the disc is equal to or greater than that of the adjacent
apparatus such that the disc and not the apparatus contacts the
riser of the step. Thereby, the disc 38 prevents the cleaning head
29 from becoming jammed against the underwater depending
apparatus.
The details of swivel 31 will be described with respect to FIG. 2.
A hollow stud 41 is interconnected with and extends downwardly from
the manifold within dome 33. A sleeve 44, having a radially
extending lip 45 at its lower extremity, is secured within stud 41
by a screw 47. Where dimensionally necessary, a spacer 46 may be
inserted intermediate sleeve 44 and stud 41. A further sleeve 42,
having a radially inwardly extending lip 43, interlocks with lip 45
of sleeve 44. Sleeve 42 is fixedly secured to the upwardly
extending part of elbow 30. Elbow 30 may be threadedly connected to
control arm 24 as shown, or it may be adhesively connected
thereto.
The construction of cleaning head 29 will be described in detail
with reference to FIG. 3. The floation ring 34 includes a sleeve 50
frictionally engaging the lower skirt of dome 33. An annular band
51 extends radially from sleeve 50 and defines the outermost
extremity of cleaning head 29 whereby it and only it will contact
the side wall when the rotating platform is in proximity
thereto.
A downwardly oriented cap 53 is centrally mounted within dome 33.
The cap includes an aperture 54 disposed in one wall thereof. The
upper sleeve 61 of a dual swivel coupling 60 mates with cap 53. An
aperture 62 is disposed within sleeve 61 to mate with aperture 54.
Jet 35 includes a tube 56 extending interior to dome 33 through an
aperture 55. Tube 56 also extends through apertures 54 and 62
within cap 53 and sleeve 61, respectively. When tube 56 is inserted
through the respective apertures, sleeve 61 will be secured within
cap 53.
The lower sleeve 63 of dual swivel coupling 60 is mounted within a
hollow stud 65 extending upwardly from manifold 59. A screw 67
interconnects stud 65 and sleeve 63 through apertures 66 and 64,
respectively, to secure the manifold to the coupling.
As best illustrated in FIG. 4, the manifold 59 includes an aperture
70 directed lateral to control arm 24 (see FIG. 1) when the latter
is angularly centered with respect to stops 32. The purpose of
aperture 70 is that of agitating the surface. A further aperture 71
is disposed in the bottom surface of manifold 59. Aperture 71
directs a stream of water downwardly to agitate any particulate
matter resting upon elements laterally protruding from side wall 3,
such as steps 4 shown in FIG. 1.
The operation of the present invention will now be described. When
a water valve (not shown) is opened, water will flow from water
supply outlet 10 through water feed line 9. A part of the water
flow will be ejected through power jet 22 to establish a reaction
force upon control arm 24. The reaction force will tend to rotate
cleaning head 29 about its vertical axis in a counter clockwise
direction. Simultaneously however, water will flow into manifold 59
with a part of the water being ejected through leading jet 37.
If the cleaning head 29 is located within the pool but not adjacent
one of the side walls 3, the reaction force created by both the
power jet and the leading jet will tend to propel the cleaning head
forwardly and laterally until it contacts a side wall. When the
annular band 51 contacts the side wall, it will usually not be at
an angle normal to the side wall. Hence, the reaction force from
the power jet and the leading jet, will cause the rotating platform
to travel along the side wall while maintaining contact therewith.
The frictional force established between the annular band 51 and
the side wall 3 will cause dome 33 to roll along the side wall
without corresponding rotation of manifold 59. The jet 35, rotated
by dome 33 sprays water in a circular pattern about the dome and
washes the side walls 3 extending above the water level. As the
annular band 51 is below the water level 7, it will not leave marks
upon the exposed side wall, which marks would ultimately become
baked by the sun and permanently disfigure the exposed side
wall.
If pool 1 includes steps extending into the pool at a depth
insufficient to clear the apparatus depending from the cleaning
head, disc 38 is attached to guide the cleaning head around these
obstructions.
Through experimentation, it has been found that excellent results
are achieved if power jet 22 is oreinted at an angle of 45.degree.
with respect to control arm 24. The biasing of the cleaning head 29
against the periphery of pool 1 is essentially controlled by
leading jet 37. The bias may be increased by angularly reorienting
leading jet 37 from a position essentially parallel from that of
power jet 22 to a more outwardly directed angle.
The swiveling capability of control arm 24 with respect to the
cleaning head 29 will present the unit from becoming stalled should
it strike a side wall at an angle of 90.degree. with respect to the
reaction force created by the power and leading jets. In such a
case, control arm 24 and manifold 59 will swivel with respect to
dome 33 to allow the force exerted by the power and leading jets to
be angularly reoriented from that of the initial position. The
reorientation will quickly create a lateral force upon dome 33 and
the latter will resume its travel along the periphery of the pool.
The imbalance of reaction forces created by the power and leading
jets is further enhanced is the angle therebetween is large.
Through experimentation, it has been learned that swivel 31 and
stops 32 may be deleted by incorporating a flexible hose in place
of control arm 24, such a modification is illustrated in FIG. 5. A
sleeve 80 is adhesively secured to stud 41 and threadedly
interconnects an elbow 81 to the stud. A flexible hose 82 is
secured to elbow 81 and extends lateral to manifold 59. The
flexible hose 82 terminates in a fitting 83.
Sleeve 80 includes a pair of diametrically opposed apertures 85 and
87 disposed within the threaded portion of the sleeve. A similar
sized aperture 86 is disposed within the threaded portion of elbow
81 to selectively cooperate with one of apertures 85 or 87. By
orienting aperture 86 with aperture 85, as shown, a jet of water
will be ejected therefrom. The reaction force of this jet of water
will essentially correspond to the reaction force established by
the leading jet 37 disposed at the other end of manifold 59 (see
FIG. 3) and be oriented in essentially the same direction. Thereby,
the travel of the cleaning head 29 will be in a direction opposite
that of the water ejected through aperture 85 and leading jet 37.
As the force exerted by the ejected water will be essentially
equal, the manifold 59 will not tend to rotate with respect to
flexible hose 82.
Previously, the swivel 31 interconnecting the power jet 22 and the
manifold 59 permitted a lateral bias to be applied to the cleaning
head 29 when it became stalled against a wall of the pool 1. With
the modification as shown in FIG. 5, such stalling is prevented by
the flexible nature of hose 82. The force exerted by the power jet
22, assuming the cleaning head to be positionally stalled, will
tend to bend the flexible hose in one direction or the other
because the reaction force established by power jet 22 is in
non-alignment with the flexible hose. When the flexible hose 22
bends, the force exerted by the power jet will be translated to a
lateral force acting upon the cleaning head, which lateral force
will cause the cleaning head to begin traveling the pool
perimeter.
The inclusion of a separate fitting and the necessary couplers to
form power jet 22 can be circumvented by a modification to the
second float coupler 28, as shown in FIG. 6. By connecting fitting
83 directly to the float coupler 28, the control arms 24, coupler
23, T-fitting 21 and power jet 22 may be deleted. To obtain the
necessary reaction force of power jet 22, a pair of apertures 91
and 92, see FIG. 7, are disposed within the upper neck 90 of float
coupler 28. These two apertures are oriented at an angle of
approximately 45.degree. with respect to a horizontal center line
passing through the float coupler.
In operation, one of apertures 91 and 92 is closed off by means
such as a screw 93. A jet of water will thence flow through the
remaining open aperture and establish a reaction force acting upon
the float coupler 28. The selection of aperture 91 or 92 is
dependent upon whether the rotating platform is to travel clockwise
or counter clockwise about the perimeter of the pool.
With the arrangement of parts shown in FIG. 3, the cleaning head 29
will travel in a counter clockwise direction. In a clockwise
direction is desired because of the configuration of the pool, or
other requirements, one of the stops 32 is momentarily dislocated
to permit 180.degree. rotation of elbow 30. The leading jet 37 must
also be reversed and the power jet 22 must be realigned and
directed away from the other side of control arm 24. Similarly, if
the rotation of the cleaning head 29, incorporating the
modifications shown in FIGS. 5, 6 and 7, is to be altered, elbow 81
is rotated within sleeve 80 until aperture 87 mates with aperture
86; aperture 92 within neck 90 is opened by removing screw 93 and
inserting the latter within aperture 91. Leading jet 37 must also
be reversed.
From the above description, it will become apparent to those
skilled in the art that the use of the modifications illustrated in
FIGS. 5, 6 and 7, eliminate all moving parts from the present
invention except that of the dual swivel coupling 60 intermediate
dome 33 and manifold 59. Thus, the expense of the present invention
has been reduced, maintainance requirements have been substantially
decreased and the complexity has been minimized.
While the principles of the invention has now been made clear in an
illustrative embodiment, there will be immediately obvious to those
skilled in the art many modifications of structure, arrangement,
proportions, the elements, materials, and components, used in the
practice of the invention which are particularly adapted for
specific environments and operating requirements without departing
from those principles.
* * * * *