EP0543387B1 - Improvements in automatic pool cleaners - Google Patents
Improvements in automatic pool cleaners Download PDFInfo
- Publication number
- EP0543387B1 EP0543387B1 EP92119752A EP92119752A EP0543387B1 EP 0543387 B1 EP0543387 B1 EP 0543387B1 EP 92119752 A EP92119752 A EP 92119752A EP 92119752 A EP92119752 A EP 92119752A EP 0543387 B1 EP0543387 B1 EP 0543387B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- peripheral region
- curvilinear
- flow
- defining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H4/00—Swimming or splash baths or pools
- E04H4/14—Parts, details or accessories not otherwise provided for
- E04H4/16—Parts, details or accessories not otherwise provided for specially adapted for cleaning
- E04H4/1654—Self-propelled cleaners
- E04H4/1663—Self-propelled cleaners the propulsion resulting from an intermittent interruption of the waterflow through the cleaner
Definitions
- Suction operable automatic swimming pool cleaners are known in the art. These machines comprise a body having a planar peripheral region defining an inlet and which region is releasably engageable with a surface to be cleaned. In use, the body is connected via an outlet to an inlet of a pump and filtration system of a swimming pool. In the body there is mounted means for intermittently varying the flow of water through the body, thereby to impart kinetic energy to the body causing the body to move automatically over the surface to be cleaned. As the body moves over the surface, debris is sucked up from the surface through said inlet.
- apparatus for cleaning a surface submerged in a liquid as claimed in claim 1 comprising a body defining a flow passage therethrough, the flow passage extending between a main inlet to the body defined in a peripheral region of the body and an outlet from the body, the peripheral region, in use, being releasably engageable with a surface to be cleaned and the outlet being connectable to a suction source; means located in the body for intermittently varying the flow of liquid through the body thereby to impart motion to the body; and liquid guide means for imparting whirling motion to liquid flowing through at least part of the body.
- This apparatus further comprising at least two inlets defined in asymmetric regions in opposed sidewalls of the body and located between said main inlet and said means to vary the flow of liquid through the body.
- the means for intermittently varying the flow of liquid through the body is preferably located downstream of the liquid guide means for imparting whirling motion to liquid flowing through at least part of the body.
- the liquid guide means for imparting whirling motion to liquid flowing through at least part of the body may comprise a plurality of curvilinear projections provided in said peripheral region of the body and defining a plurality of curvilinear channels between them.
- the means for imparting whirling motion to liquid flowing through at least part of the body may alternatively or in addition comprise two further inlets defined in asymmetric regions in opposed sidewalls of the body between said main inlet and said outlet.
- the two further inlets may be offset relative to one another on a line which is substantially parallel to a general plane of the peripheral region.
- the two further inlets may have different sizes.
- the body comprises a head defining a chamber communicating with said main inlet and first and second exits from the head; first and second elongate drive tubes communicating with the first and second exits; and a coupling arrangement connected to said first and second tubes and which coupling arrangement defines said outlet from the body; and the means for intermittently varying the flow of liquid through the body comprises a pivotal valve located in the chamber and which valve, in use, pivots between a first position wherein it obstructs said first exit and a second position wherein it obstructs said second exit.
- a footpad for a cleaner for a surface submerged in a liquid comprising a disc-like body defining an opening for communicating with a main inlet of the cleaner; a plurality of curvilinear projections provided on one face of the disc-like body defining a plurality of curvilinear channels between them, the channels extending from a peripheral outer region of the body to the opening. At least one of the projections may be made of a resilient porous material.
- a suction operable automatic swimming pool cleaner according to the invention is generally designated by the reference numeral 10 in figure 1.
- the cleaner comprises a body 12 comprising a head 14, first and second elongate drive tubes 16,18 extending from the head 14 and a coupling arrangement 20.
- the body defines a flow passage for water therethrough extending between a main inlet 26 to the body and an outlet 41 from the body.
- the head 14 has a planar peripheral region 22 provided by a flange 24.
- the main inlet 26 is defined in the peripheral region.
- Main inlet 26 communicates with a lower chamber 28 which is bounded by a baffle plate 29 defining a port 30 communicating with chamber 32, for pivotal hammer valve 34.
- Chamber 32 has first and second exits 36 and 38 communicating with the elongate drive tubes 16 and 18 respectively.
- Coupling arrangement 20 comprises a swivel coupling 40 defining outlet 41 and which coupling, in use, is connectable via a flexible hose (not shown), to an inlet of a pump and filtration system (also not shown) of a swimming pool.
- valve 34 having opposed sealing faces 34.1 is mounted off-centre in chamber 32 and, in use, pivots under the influence of water flow through chamber 32, between a first position wherein it obstructs exit 35 and a second position wherein it obstructs exit 38.
- a footpad 42 is removably mountable on flange 24.
- the footpad 42 comprises a circular body 43 defining a central hole 44, which, in use, communicates with main inlet 26.
- a plurality of curvilinear projections 46 defining a plurality of curvilinear channels 48 extending inwardly towards the hole 44 from the outer periphery of the footpad. At least some of the projections are made of a porous resilient material.
- the apparatus assumes the attitude illustrated in figure 1 on a submerged horizontal surface to be cleaned.
- suction is applied to the apparatus 10 by the said pump, water entraining debris enters the body via curvilinear channels 48, hole 44 and main inlet 26.
- the curvilinear channels impart a whirling motion to the water entering the body.
- Water is also admitted through offset further inlets 50 and 52, which also impart whirling motion to the water admitted.
- the projections 46 made of a resilient foam material act like suction pads and serve to improve traction of the footpad 42 on the surface being cleaned.
- each drive tube 16, 18 comprises a plurality of axially and radially inwardly extending internal strakes 53. These strakes serve to straighten the flow of water as it passes through the drive tubes 16, 18.
- a clearance 53 between swivel coupling 40 and a bearing 54 which is a friction fit in the body of coupling arrangement 20.
- a washer 56 is supported on an inwardly directed flange 58 on the body below the lower end of the coupling 40 and is so shaped that water drawn into the coupling arrangement through the clearance 53 is directed along the inside wall of the coupling 40 in the same direction as the main water flow.
- This arrangement not only reduces vortices in flow in the region of the coupling arrangement 20, but also increases the flow towards the pump by as much as 5%.
- the bumper arrangement 60 shown in figure 1 is made of a material having a specific gravity greater than that of water. This increased weight together with the leverage effect of being applied at a distance from the body 12, improves the ability of the cleaner 10 to turn off a sidewall (not shown) of a swimming pool (also not shown).
- the external fins 62 on the head 14 are slightly inclined relative to the plane of the peripheral region 22. These fins act like airfoils to press the cleaner 10 into closer contact with the surface being cleaned.
Description
- THIS invention relates to cleaners for submerged surfaces. More particularly it relates to suction operable automatic swimming pool cleaners.
- Suction operable automatic swimming pool cleaners are known in the art. These machines comprise a body having a planar peripheral region defining an inlet and which region is releasably engageable with a surface to be cleaned. In use, the body is connected via an outlet to an inlet of a pump and filtration system of a swimming pool. In the body there is mounted means for intermittently varying the flow of water through the body, thereby to impart kinetic energy to the body causing the body to move automatically over the surface to be cleaned. As the body moves over the surface, debris is sucked up from the surface through said inlet. One such a cleaner, from which the present invention proceeds, in which the means for intermittently varying the flow of water through the body comprises a pivotal hammer valve is disclosed in US Patent 4,023,227. Another cleaner of the kind described is disclosed in US Patent 4,642,833. In this case the means for intermittently varying the flow of water through the body comprises a pinch valve arrangement. The patent DE-A-1.684.604 shows a suction part, connected by means of a hose to a suction device, comprising liquid guide means.
- It is an object of the present invention to provide alternate apparatus for cleaning a surface submerged in a liquid which the applicant believe will have improved operation.
- According to the invention, there is provided apparatus for cleaning a surface submerged in a liquid as claimed in claim 1. This apparatus comprising a body defining a flow passage therethrough, the flow passage extending between a main inlet to the body defined in a peripheral region of the body and an outlet from the body, the peripheral region, in use, being releasably engageable with a surface to be cleaned and the outlet being connectable to a suction source; means located in the body for intermittently varying the flow of liquid through the body thereby to impart motion to the body; and liquid guide means for imparting whirling motion to liquid flowing through at least part of the body. This apparatus further comprising at least two inlets defined in asymmetric regions in opposed sidewalls of the body and located between said main inlet and said means to vary the flow of liquid through the body.
- The means for intermittently varying the flow of liquid through the body is preferably located downstream of the liquid guide means for imparting whirling motion to liquid flowing through at least part of the body.
- The liquid guide means for imparting whirling motion to liquid flowing through at least part of the body may comprise a plurality of curvilinear projections provided in said peripheral region of the body and defining a plurality of curvilinear channels between them.
- The plurality of curvilinear projections are preferably provided on a face of a footpad, which is removably mountable on the body in the peripheral region thereof.
- The means for imparting whirling motion to liquid flowing through at least part of the body may alternatively or in addition comprise two further inlets defined in asymmetric regions in opposed sidewalls of the body between said main inlet and said outlet. The two further inlets may be offset relative to one another on a line which is substantially parallel to a general plane of the peripheral region. The two further inlets may have different sizes.
- In one embodiment of the apparatus according to the invention the body comprises a head defining a chamber communicating with said main inlet and first and second exits from the head; first and second elongate drive tubes communicating with the first and second exits; and a coupling arrangement connected to said first and second tubes and which coupling arrangement defines said outlet from the body; and the means for intermittently varying the flow of liquid through the body comprises a pivotal valve located in the chamber and which valve, in use, pivots between a first position wherein it obstructs said first exit and a second position wherein it obstructs said second exit.
- It has been found that it is advantageous to straighten the flow through the drive tubes and therefore at least one of said first and second elongate drive tubes may comprise at least one axially extending internal strake.
- Also included within the scope of the present invention is a footpad for a cleaner for a surface submerged in a liquid comprising a disc-like body defining an opening for communicating with a main inlet of the cleaner; a plurality of curvilinear projections provided on one face of the disc-like body defining a plurality of curvilinear channels between them, the channels extending from a peripheral outer region of the body to the opening. At least one of the projections may be made of a resilient porous material.
- The invention will now further be described, by way of example only, with reference to the accompanying diagrams wherein:
- figure 1
- is a diagrammatic side view of a cleaner according to the invention for cleaning a surface submerged in a liquid;
- figure 2
- is a diagrammatic view of a footpad of the cleaner, in the direction of arrow A in figure 1;
- figure 3
- is a section on line III in figure 1;
- figure 4
- is a transverse section through an elongate drive tube forming part of the cleaner;
- figure 5
- is a diagrammatic enlarged view, partially sectioned, of the region identified as X in figure 1;
- figure 6
- is a diagrammatic enlarged view, partially in section, of the region identified as Y in figure 5; and
- figure 7
- is a diagrammatic enlarged view of the region identified as Z in figure 1.
- A suction operable automatic swimming pool cleaner according to the invention is generally designated by the
reference numeral 10 in figure 1. - The cleaner comprises a
body 12 comprising ahead 14, first and secondelongate drive tubes head 14 and acoupling arrangement 20. The body defines a flow passage for water therethrough extending between amain inlet 26 to the body and anoutlet 41 from the body. - The
head 14 has a planarperipheral region 22 provided by aflange 24. Themain inlet 26 is defined in the peripheral region.Main inlet 26 communicates with alower chamber 28 which is bounded by abaffle plate 29 defining aport 30 communicating withchamber 32, forpivotal hammer valve 34.Chamber 32 has first andsecond exits elongate drive tubes -
Coupling arrangement 20 comprises aswivel coupling 40 definingoutlet 41 and which coupling, in use, is connectable via a flexible hose (not shown), to an inlet of a pump and filtration system (also not shown) of a swimming pool. - As best shown in figure 7, in
chamber 32 and about each ofexits chamber 32 and, in use, pivots under the influence of water flow throughchamber 32, between a first position wherein it obstructs exit 35 and a second position wherein it obstructsexit 38. - As shown in figure 1, a
footpad 42 is removably mountable onflange 24. As best shown in figure 2, thefootpad 42 comprises acircular body 43 defining acentral hole 44, which, in use, communicates withmain inlet 26. On the bottom surface offootpad 42 which, in use, bears on the surface being cleaned, there are provided a plurality ofcurvilinear projections 46 defining a plurality ofcurvilinear channels 48 extending inwardly towards thehole 44 from the outer periphery of the footpad. At least some of the projections are made of a porous resilient material. - As shown in figures 1 and 3, in opposed sidewalls 14.1 of
head 14 and in the region oflower chamber 28, there are defined twofurther inlets peripheral region 22. - In use, the apparatus assumes the attitude illustrated in figure 1 on a submerged horizontal surface to be cleaned. When suction is applied to the
apparatus 10 by the said pump, water entraining debris enters the body viacurvilinear channels 48,hole 44 andmain inlet 26. The curvilinear channels impart a whirling motion to the water entering the body. Water is also admitted through offsetfurther inlets - The water flows through
chamber 28,port 30 andchamber 32 towardsoutlet 41. As more fully described in US patent 4,023,227, water flowing past thevalve 34 causes the valve to pivot between the said first and second positions, thereby alternately and repeatedly to obstruct flow throughexits exits - The
projections 46 made of a resilient foam material act like suction pads and serve to improve traction of thefootpad 42 on the surface being cleaned. - As illustrated in figure 4, each
drive tube internal strakes 53. These strakes serve to straighten the flow of water as it passes through thedrive tubes - As is clear in figure 6, there is defined a
clearance 53 betweenswivel coupling 40 and abearing 54 which is a friction fit in the body ofcoupling arrangement 20. Awasher 56 is supported on an inwardly directedflange 58 on the body below the lower end of thecoupling 40 and is so shaped that water drawn into the coupling arrangement through theclearance 53 is directed along the inside wall of thecoupling 40 in the same direction as the main water flow. This arrangement not only reduces vortices in flow in the region of thecoupling arrangement 20, but also increases the flow towards the pump by as much as 5%. - The
bumper arrangement 60 shown in figure 1 is made of a material having a specific gravity greater than that of water. This increased weight together with the leverage effect of being applied at a distance from thebody 12, improves the ability of the cleaner 10 to turn off a sidewall (not shown) of a swimming pool (also not shown). - As shown in figure 1, the
external fins 62 on thehead 14 are slightly inclined relative to the plane of theperipheral region 22. These fins act like airfoils to press the cleaner 10 into closer contact with the surface being cleaned. - By adopting one or more of the features discussed above, it has been found that there is an increase in the flow of water through the cleaner.
- It will be appreciated that there are many variations in detail on the apparatus according to the invention without departing from the scope of the appended claims.
Claims (12)
- Apparatus for cleaning a surface submerged in a liquid, the apparatus comprising a body (12) defining a flow passage (28,32,16,18, and 20) therethrough, the flow passage extending between a main inlet (26) to the body defined in a peripheral region (22) of the body and an outlet (41) from the body, the peripheral region, in use, being releasably engageable with a surface to be cleaned and the outlet being connectable to a suction source; and means (34) located in the body for intermittently varying the flow of liquid through the body thereby to impart motion to the body; characterized by the fact that it comprises means for imparting whirling motion to liquid flowing through at least part of the body comprising liquid guide means comprising at least two inlets (50,52) defined in asymmetric regions in opposed sidewalls (14.1) of the body.
- Apparatus as claimed in claim 1 wherein the means (34) for intermittently varying the flow of liquid through the body is located downstream of the liquid guide means (50,52) for imparting whirling motion to liquid flowing through at least part of the body.
- Apparatus as claimed in claim 1, characterized by the fact that the liquid guide means for imparting whirling motion to liquid flowing through at least part of the body comprises further a plurality of curvilinear projection (46) provided in said peripheral region of the body and defining a plurality of curvilinear channels (48) between them for guiding liquid through the main inlet (26).
- Apparatus as claimed in claim 3, wherein the plurality of curvilinear projections (46) are provided on a face of a footpad (42), which is mountable on the body in the peripheral region thereof.
- Apparatus as claimed in claim 4, wherein the footpad is removably mountable on a flange (24) in the peripheral region of the body.
- Apparatus as claimed in claim 1, wherein the two inlets (50,52) have different sizes.
- Apparatus as claimed in any one of the preceeding claims, wherein the body comprises a head (14) defining a chamber (32) communicating with said main inlet (26) and first and second exits (36,38) from the head; first and second elongate drive tubes (16,18) communicating with the first and second exits; a coupling arrangement (20) connected to said first and second tubes and which coupling arrangement defines said outlet from the body; wherein the means for intermittently varying the flow of liquid through the body comprises a pivotal valve (34) located in the chamber and which valve, in use, pivots between a first position wherein it obstructs said first exit and a second position wherein it obstructs said second exit.
- Apparatus as claimed in claim 7, wherein the head has external fins (62) thereon which are inclined relative to a general plane of said peripheral region.
- Appparatus as claimed in claim 7 or claim 8 comprising a bumber assembly (60) arching out from the body, the bumber assembly being made of a material having a specific gravity greater than that of water.
- Apparatus as claimed in any one of claims 7 to 9 wherein at least one of said first and second elongate drive tubes comprises at least one axially extending internal strake (53).
- An apparatus as claimed in claim 3, characterized in that the projections (46) are curvilinear in configuration defining a plurality of curvilinear channels (48) between them, the channels extending from a peripheral outer region of the body to the opening and by the fact that said configurations are carried by a removable foodpad of the apparatus.
- An apparatus as claimed in claim 11, wherein at least one of the projections is made of a resilient porous material.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96105686A EP0721033B1 (en) | 1991-11-20 | 1992-11-19 | Improvements in automatic pool cleaners |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU88025/91A AU8802591A (en) | 1991-11-20 | 1991-11-20 | Improvements in automatic pool cleaners |
AU88025/91 | 1991-11-20 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96105686A Division EP0721033B1 (en) | 1991-11-20 | 1992-11-19 | Improvements in automatic pool cleaners |
EP96105686.8 Division-Into | 1996-04-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0543387A2 EP0543387A2 (en) | 1993-05-26 |
EP0543387A3 EP0543387A3 (en) | 1993-09-01 |
EP0543387B1 true EP0543387B1 (en) | 1997-06-04 |
Family
ID=3763275
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92119752A Expired - Lifetime EP0543387B1 (en) | 1991-11-20 | 1992-11-19 | Improvements in automatic pool cleaners |
EP96105686A Expired - Lifetime EP0721033B1 (en) | 1991-11-20 | 1992-11-19 | Improvements in automatic pool cleaners |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96105686A Expired - Lifetime EP0721033B1 (en) | 1991-11-20 | 1992-11-19 | Improvements in automatic pool cleaners |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP0543387B1 (en) |
AU (1) | AU8802591A (en) |
DE (2) | DE69229187T2 (en) |
ES (2) | ES2131889T3 (en) |
ZA (1) | ZA928984B (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA944756B (en) * | 1993-07-09 | 1995-02-16 | Zarina Holdings Cv | Swimming-pool cleaner operating head |
US5546982A (en) * | 1994-10-28 | 1996-08-20 | Baracuda International Corp. | Automatic swimming pool cleaners and associated components |
AU721028B2 (en) * | 1995-07-06 | 2000-06-22 | Kreepy Krauly Australia Pty Ltd | Automatic cleaners for sweeping and cleaning swimming pools |
US5617606A (en) * | 1996-02-29 | 1997-04-08 | Baracuda International Corp. | Fluted swimming pool cleaner discs |
GB2322539B (en) * | 1997-02-26 | 2000-06-28 | Michael Chandler | Pool cleaning apparatus |
US5930856A (en) * | 1997-04-08 | 1999-08-03 | Baracuda International Corp. | Automatic swimming pool cleaners and associated components |
US6049933A (en) * | 1997-08-12 | 2000-04-18 | Zodiac Pool Care, Inc. | Bumper assemblies for swimming pool cleaners |
US5882512A (en) * | 1997-11-05 | 1999-03-16 | Baracuda International Corporation | Automatic swimming pool cleaners and associated components and systems |
US6226826B1 (en) | 1999-02-05 | 2001-05-08 | Zodiac Pool Care, Inc. | Bumper assemblies for swimming pool cleaners |
FR2812015B1 (en) | 2000-07-24 | 2003-01-24 | Jacques Alexandre Habif | POOL PRESSURE PRESSURE POOL CLEANER ROBOT AND METHOD |
US6436720B1 (en) | 2000-09-15 | 2002-08-20 | Cellular Process Chemistry, Inc. | Residence time providing module/apparatus |
US6423217B1 (en) * | 2000-09-15 | 2002-07-23 | Letro Products, Inc. | Pool cleaner having vortex drive tube |
US6625833B1 (en) * | 2000-09-15 | 2003-09-30 | Pentair Pool Products, Inc. | Pool cleaning apparatus with adjustable bumper assembly |
AUPR358401A0 (en) * | 2001-03-07 | 2001-04-05 | Zoltans Pool Products Pty Ltd | Automatic cleaners for cleaning swimming pools |
AU2002234433B8 (en) * | 2001-03-07 | 2002-09-19 | Zoltans Pool Products Pty Ltd | Automatic pool cleaner with flip flop valve |
AUPR382301A0 (en) * | 2001-03-20 | 2001-04-12 | K.K. Australia Pty Ltd | An improved valve arrangement for an automatic pool cleaner |
US6473928B1 (en) * | 2001-05-15 | 2002-11-05 | Polaris Pool Systems, Inc. | Magnetic control valve for a suction powered pool cleaner |
FR2830559B1 (en) * | 2001-10-04 | 2003-12-19 | Alain Habif | HYDRAULIC FORCE POOL VACUUM |
CN2821043Y (en) * | 2005-08-12 | 2006-09-27 | 王怀平 | Self cleaner bottom plate |
US8082617B2 (en) * | 2005-09-13 | 2011-12-27 | Zodiac Pool Systems, Inc. | Automatic swimming pool cleaners |
WO2008096205A1 (en) * | 2007-02-06 | 2008-08-14 | Zodiac Pool Care South Africa (Pty) Limited | Swimming pool cleaner |
KR101622716B1 (en) * | 2014-09-24 | 2016-05-19 | 엘지전자 주식회사 | Robot cleaner |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1889603A (en) * | 1931-03-20 | 1932-11-29 | Jordie J Johnston | Device and apparatus for cleaning tanks and the like |
US3046583A (en) * | 1960-02-08 | 1962-07-31 | Emil J Drennan | Swimming pool cleaner |
US3753496A (en) * | 1971-12-20 | 1973-08-21 | E Boyd | Converging vortex apparatus for separating oil from water |
US4193156A (en) * | 1976-08-19 | 1980-03-18 | Daniel Jean Velere Denis Chauvier | Apparatus for cleaning submerged surfaces |
FR2604351A1 (en) * | 1986-09-30 | 1988-04-01 | Dentraygues Michel | Mechanism for propelling a pool vacuum-cleaner |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1684604A1 (en) * | 1966-01-19 | 1971-03-18 | Robert Conrad | Suction device for swimming pools |
CA1066462A (en) * | 1975-02-25 | 1979-11-20 | Fernand L.O.J. Chauvier | Apparatus for cleaning submerged surfaces |
US4208752A (en) * | 1976-08-23 | 1980-06-24 | Hofmann Helmut J | Cleaning apparatus for submerged surfaces |
NZ203376A (en) * | 1982-03-09 | 1987-02-20 | Daniel J V D Chauvier | Swimming pool cleaner with rotatable"bumpers"on a carrier element |
US4642833A (en) * | 1985-03-14 | 1987-02-17 | Coxwold (Proprietary) Limited | Valve assembly |
ES2017033A6 (en) * | 1988-08-15 | 1990-12-16 | Bph Patent Holding Ag | Swimming pool cleaner |
-
1991
- 1991-11-20 AU AU88025/91A patent/AU8802591A/en not_active Abandoned
-
1992
- 1992-11-19 DE DE69229187T patent/DE69229187T2/en not_active Expired - Fee Related
- 1992-11-19 DE DE69220187T patent/DE69220187T2/en not_active Expired - Fee Related
- 1992-11-19 ES ES96105686T patent/ES2131889T3/en not_active Expired - Lifetime
- 1992-11-19 EP EP92119752A patent/EP0543387B1/en not_active Expired - Lifetime
- 1992-11-19 ES ES92119752T patent/ES2103869T3/en not_active Expired - Lifetime
- 1992-11-19 EP EP96105686A patent/EP0721033B1/en not_active Expired - Lifetime
- 1992-11-20 ZA ZA928984A patent/ZA928984B/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1889603A (en) * | 1931-03-20 | 1932-11-29 | Jordie J Johnston | Device and apparatus for cleaning tanks and the like |
US3046583A (en) * | 1960-02-08 | 1962-07-31 | Emil J Drennan | Swimming pool cleaner |
US3753496A (en) * | 1971-12-20 | 1973-08-21 | E Boyd | Converging vortex apparatus for separating oil from water |
US4193156A (en) * | 1976-08-19 | 1980-03-18 | Daniel Jean Velere Denis Chauvier | Apparatus for cleaning submerged surfaces |
FR2604351A1 (en) * | 1986-09-30 | 1988-04-01 | Dentraygues Michel | Mechanism for propelling a pool vacuum-cleaner |
Also Published As
Publication number | Publication date |
---|---|
EP0721033A2 (en) | 1996-07-10 |
ZA928984B (en) | 1994-05-20 |
AU8802591A (en) | 1993-06-17 |
ES2103869T3 (en) | 1997-10-01 |
EP0543387A2 (en) | 1993-05-26 |
EP0543387A3 (en) | 1993-09-01 |
EP0721033B1 (en) | 1999-05-12 |
DE69220187D1 (en) | 1997-07-10 |
DE69229187T2 (en) | 1999-10-28 |
DE69220187T2 (en) | 1997-10-02 |
DE69229187D1 (en) | 1999-06-17 |
EP0721033A3 (en) | 1996-10-16 |
ES2131889T3 (en) | 1999-08-01 |
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