Patent AU-2021103331-A4 (AU)
Title: Cleaning Device Incorporating A Water Jet Facility For The Removal Of Particulates From Water Features
Inventor: METCALF PETER
IPC: E04H4/16
Filed: 2021-06-14
Granted: 2021-08-12
Abstract: Page 
ABSTRACT 
The present invention describes an apparatus for the purpose of removing 
particulates from the shell, base, and steps of any swimming pools, plunge 
pools, spas, hot tubs, fountains, ponds, and any garden water features. The 
unit is designed for the cleaning of leaves and small debris including stones 
from the abovementioned Water Features. In addition, it is designed for the 
removal of particulates both in the suspension of and on the surfaces of water 
features. To collect debris, the Invention uses a solid cylindrical chamber 
through which the debris passes. A high-pressure jet or jets are located at or 
over the the leading or front edge of the Main Chamber. When high-pressure 
fluid is injected through those jets at high velocity into the streamlined Main 
Chamber through those rear facing jets, this causes a static volume of fluid 
held within the Main Chamber to instantly drop in pressure. The Pressure 
Differential creates a flow into the device from the fluid immediately outside 
and adjacent to the surroundings of the inlet opening of the Main Chamber.  
That external fluid has a natural higher pressure, to the lower pressure created 
in the Main Chamber. This flow draws debris into the device and the flow 
continues to the rear outlet of the device. The principle for creating the flow 
for this device is not a siphon or a fluid wash methodology, but it is the use of 
the principle that when high velocity pressurised fluids are injected into 
contained static volumes of fluid as found in the cylindrical Main Chamber of 
this device. This device is designed to be used in any depth of a water feature 
including the cleaning debris from the base, particulates held in suspension, 
and from the surfaces of water features. Surface collection is possible since the 
device can be operated in an inverted or angled position without alteration to 
the original design or configuration of the device. Additionally, the design of 
the device allows for debris to be collected from the steps, acute corners or 
shallow areas of water features. The unit is designed to operate in depths of 
fluid where the water jets at the inlet to the Main Chamber are submerged.  
This means that the device can be operated in very shallow water features.  
Due to the efficiency of the principle used, the device will not only remove dirt, 
leaves, and other debris common to water features but will also collect items
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including but not limited to solid items such as stones, pebbles, coins, and 
pieces of glass. Water or fluid is delivered to the device by connecting a garden 
hose or hose to the Water Jets through a Water Input Pipe. The Water Input 
Pipe can serve as a Handle with the high-pressure water flowing through the 
Handle to the jets. The Handle to which the hose is connected may be of 
tubular construction, or of multi part, or telescopic in nature. The flow of water 
and subsequent rate of collection of particulates being collected in the filter 
container or collector can be varied by controlling the flow of water produced 
at the water jets. This flow can be controlled by altering the hose water 
pressure by way of the hose faucet or by incorporating a water pressure 
control unit in the hose line. AS previously detailed the design of the device 
permits for the use of common pool type telescopic, and fixed handles/shafts.  
A garden hose adaptor is incorporated in these units, and one of these can be 
used as an interface to the device's Water Input Pipe which feeds water to the 
jets of the device. A Pool Pole can also be used in conjunction with the device.  
An interface tube with a Pool Pole holder can be located at the rear of the 
Main Chamber for this purpose. Further, a Pool Pole Holder can be mounted at 
any convenient point on the Main Chamber. As the unit can be inverted or 
used at any attitude to maximise cleaning capability, the retention of debris in 
a collection unit (collection bag, sock, debris cartridge, etc) is assisted by a 
secondary water jet. This is a small diameter tube that extends from the high
pressure water/fluid delivery section of the device to the end of the rear 
section of the Main Chamber. This secondary jet assists in the flow of debris 
from the chamber into the collector at the rear of the chamber and assists in 
eliminating the "back flow" of debris back into the Main Chamber.
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