Brushing – scrubbing – and general cleaning – Attachments – For a vacuum cleaner
Patent
1999-06-10
2000-09-26
Till, Terrence R.
Brushing, scrubbing, and general cleaning
Attachments
For a vacuum cleaner
15 17, E04H 416
Patent
active
061227943
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a component for a suction operated automatic swimming pool cleaner.
BACKGROUND OF THE INVENTION
Several kinds of swimming pool cleaners have been developed which operate on suction generated by the swimming pool filtration plant. Usually these cleaners require a flexible disc to hold the cleaner against the surface being cleaned and a wear resistant foot which runs over the surface. The foot is moulded to have a stepped configuration so that water can pass under the disc and foot carrying detritus into the cleaner body and thence to be caught in a collection trap or the pool filter.
The foot is firmly resiliently engaged on the body and the disc engaged in a peripheral recess around the foot so that it can rotate around the foot. The components are made of different materials and are costly components of the cleaner.
OBJECT OF THE INVENTION
The Applicant has monitored the wear and tear on many cleaners and the object of this invention is to provide a component which will materially reduce the cost of manufacture of the pool cleaner while in no way reducing its efficacy in use.
SUMMARY OF THE INVENTION
According to this invention there is provided a swimming pool cleaner component comprising a foot and flexible disc moulded as an integral unit.
Further features of this invention provide for the foot to be rotatable on and supported by the body of the pool cleaner, for the shape of the foot to generally conform to a truncated conical shape and for the inner edges of the surface engaging parts of the foot to be more rigid than the outer edges.
The invention also provides for the disc to have a ring of reduced thickness around the foot and to have radially extending ribs of reduced thickness and a series of venturi openings spaced apart from the foot symmetrically there around. The surface of material around the openings in contact in use with a surface being cleaned will preferably be dished to ensure a very thin suction at the opening.
The invention also provides for the upper surface of the foot to provide a series of sand traps facilitating the transport of sand cleaned from the pool through the cleaner.
The outer edge of the disc will preferably be of serrated shape with short upward projections extending from the peaks of the serrations.
It is a feature of this invention that the component can be moulded from a polyvinyl chloride composition.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of this invention will become apparent from the following description of two examples illustrated in the accompanying drawings in which:
FIG. 1 is a plan view of the cleaner component in accordance with a first embodiment of the invention;
FIG. 2 is a diametral section through the central part of the component on section II--II;
FIG. 3 is a plan view of a second embodiment of the invention;
FIG. 4 is an underneath view of the second embodiment;
FIG. 5 is a diametral sectional elevation on section V--V;
FIG. 6 is an enlarged partial diametral sectional elevation on section VI--VI;
FIG. 7 is an enlarged diametral section through the central part on section V--V;
FIG. 8 is an enlarged diametral section through the central point on section VI--VI;
FIG. 9 is a partial sectional elevation showing a hinge detail; and
FIG. 10 is a plan view showing a detail of venturi holes.
FIG. 11 illustrates the disc of FIG. 2 in connection with a cleaner (shown in broken lines) having a body.
DETAILED DESCRIPTION OF THE DRAWINGS
As shown the component 1 for a swimming pool cleaner is preferably moulded of polyvinyl chloride material. This material is chosen to be cross-linkable to enable wear resistance characteristics to be varied to predetermined degrees. The component is designed so that this material can be used without distorting hoop stresses developing in the component during curing. This is achieved by the construction described below.
The component 1 consists of a peripheral annular disc part 2 integrally moulded with a central boss part forming a foot 3 f
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Russell Dean W.
Till Terrence R.
Zodiac Pool Care, Inc.
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