US20080276388A1 - Suction-type pool cleaner - Google Patents
Suction-type pool cleaner Download PDFInfo
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- US20080276388A1 US20080276388A1 US11/872,194 US87219408A US2008276388A1 US 20080276388 A1 US20080276388 A1 US 20080276388A1 US 87219408 A US87219408 A US 87219408A US 2008276388 A1 US2008276388 A1 US 2008276388A1
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- United States
- Prior art keywords
- chamber
- suction
- hammer
- pool cleaner
- float
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- 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.)
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-
- 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
- THIS invention relates to a suction type pool cleaner.
- Suction-type pool cleaners are well known and have been in widespread use for a number of years.
- suction-type pool cleaners are connected by a flexible hose to a suction point, typically a suction inlet at the weir of a swimming pool.
- the cleaner operates on the submerged surface of the pool and water is sucked through it by the pump of the swimming pool filtration unit.
- One particularly popular suction-type pool cleaner has a valve chamber with an inlet which in operation is situated near to the submerged surface and through which a water flow is sucked.
- the chamber accommodates a valve member or hammer which oscillates under the influence of the suction flow and which directs the flow alternately to one or the other of a pair of outlet passages leading away from the valve chamber to the hose.
- the resulting variations in momentum of the water flow as well as variations in the suction effect at the inlet cause the cleaner to move, preferably in a random manner, over the submerged surfaces of the pool.
- the invention provides a suction-type pool cleaner having an elongate body, a float structure including a float, arms carrying the float and means for connecting the arms releasably to the body at a selected one of a plurality of different positions along the length of the body.
- the connecting means is configured to allow the float structure to pivot relative to the body both about a lateral axis transverse to the body and about the longitudinal axis of the body.
- the connecting means may comprise a bracket which is shaped to make releasable, clipping engagement with the body at any one of a plurality of positions along the length of the body and which carries laterally projecting pivot shafts, and the float structure comprises a pair of laterally spaced arms formed with elongate slots through which the shafts extend, the float being supported between the arms at a position remote from the slots and the slots being oversize with respect to the shafts to allow the float structure to pivot and tilt relative to the bracket and hence relative to the body.
- the arms themselves may be of adjustable length.
- the cleaner comprises a valve chamber having an inlet and an outlet and a hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer, at least portions of the shoulders sloping at an acute angle relative to the side walls of the suction chamber.
- Each shoulder may include a first portion oriented at right angles to the relevant side wall and a second portion which extends from the first portion at an acute angle relative to the side wall.
- the cleaner comprises a valve chamber of tapering shape having an inlet and an outlet and a wedge-shaped hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer, wherein the shoulders converge in a downstream direction towards a relatively narrow end of the chamber in which a relatively narrow end of the hammer is located, the shoulders being rebated at positions towards the narrow end of the chamber end so as to define flushing channels through which particulate matter can be flushed from the chamber by the suction flow.
- the cleaner may have a suction head and an elongate body extending in a downstream direction from the head, a balancing weight and means for attaching the balancing weight releasably to the elongate body at a selected one of a plurality of different positions along the length of the body.
- the attaching means may be a bracket which carries the weight and which can be clipped selectively to the body at any selected one of the different positions.
- the weight may be encapsulated in a sheath carried by the bracket.
- the pool cleaner includes, at an operatively downstream end of the elongate body, a swivel arrangement by means of which the cleaner is attachable in use to a flexible suction hose, the swivel arrangement including a first flanged member engagable with the end of the body, a second flanged member engagable with the hose, a swivel ring located between the flanges of the first and second members and means for holding the assembly of members and swivel ring together such that the flanges of the members can slide rotationally on the ring.
- FIG. 1 shows a perspective view of a suction-type pool cleaner according to the invention
- FIG. 2 shows a side view of the suction-type pool cleaner of FIG. 1 ;
- FIG. 3 shows a cross-section at the line 3 - 3 in FIG. 2 ;
- FIG. 4 shows a fragmentary perspective view of the head of the body of the pool cleaner
- FIG. 5 shows a cross-section at the line 5 - 5 in FIG. 4 ;
- FIG. 6 shows a cross-section at the line 6 - 6 in FIG. 5 ;
- FIG. 7 shows a cross-section at the line 7 - 7 in FIG. 6 ;
- FIG. 8 shows a partially exploded perspective view of a pool cleaner according to another embodiment of the invention.
- FIG. 9 shows a side view of the pool cleaner seen in FIG. 8 ;
- FIG. 10 shows a cross-sectional view of the swivel arrangement
- FIG. 11 shows a perspective view of a swivel ring forming part of the arrangement seen in FIG. 10 .
- the cleaner 10 has a cleaner or suction head 12 and a tubular structure 14 which mates, as described in WO 2005/038170, with the head 12 to form a composite, elongate body 16 .
- the head terminates at its operatively lower end in a circular foot 18 to which an annular footpad 20 is fitted.
- the inner extremity of a flexible, annular skirt 22 is fitted over the foot 18 as illustrated.
- the footpad and skirt are not shown in FIGS. 4 and 5 .
- the foot 18 defines an entrance opening 19 leading through an entrance space 24 to an inlet 26 in a cover member 28 . Side openings 21 also lead into the space 24 .
- the inlet 26 leads into a valve chamber 30 which is of tapering shape.
- the chamber has a relatively narrow downstream end 33 and a relatively wide upstream end 34 adjacent the inlet 26 .
- Located in the valve chamber 30 is a wedge-shaped hammer 32 having a relatively narrow end 38 , locating at the relatively narrow end 33 of the chamber, and a relatively wide end 40 .
- the tubular structure 14 has side-by-side internal passages 14 . 1 and 14 . 2 of oval or elliptical shape as shown in FIG. 3 . These passages communicate at their upstream or operatively lower ends, via an outlet space 15 , with the downstream end 33 of the valve chamber when the tubular structure 14 is connected to the head 12 as shown in FIG. 1 .
- the downstream end of the tubular structure 14 is connected in use, via a swivel arrangement 17 , to a flexible hose 114 ( FIG. 10 ) extending from a suction point in a swimming pool, typically the suction inlet in the weir structure of the pool.
- the swivel arrangement 17 is described below in more detail with reference to FIGS. 10 and 11 .
- the footpad and skirt locate against a submerged surface in the pool.
- Suction applied at the suction inlet of the pool by the associated pool pump and filtration unit draws water from the region of the submerged surface through the entrance opening 19 , side openings 21 , entrance space 24 , inlet 26 , valve chamber 30 , outlet space 15 and passages 14 . 1 , 14 . 2 .
- the suction flow through the valve chamber causes the hammer 32 to oscillate back and forth in the chamber as indicated by the arrow 42 in FIG. 5 .
- this oscillation of the hammer causes the cleaner to move, preferably in a generally random manner, about the submerged surface of the pool.
- Submerged debris is extracted from the pool by suction through the pool cleaner and hose.
- a suction-type pool cleaner It is important for a suction-type pool cleaner to maintain an appropriate attitude relative to the submerged surface inter alia so that the footpad and skirt can locate properly against the submerged surface in order to achieve the desired suction effect. It is conventional practice in a suction-type pool cleaner to incorporate some or other means providing appropriate buoyancy, and also weighting, to the cleaner body to maintain it at the desired attitude. In WO 2005/038170 the necessary buoyancy is incorporated in the moulded walls of the body itself. In addition to internal buoyancy as described in the international application, or as an alternative thereto, the illustrated embodiment includes a float structure indicated generally by the numeral 44 . It also includes an underslung weight 45 as described in WO 2005/038170.
- the float structure 44 includes a pair of elongate, parallel arms 46 and a float 48 attached to and supported between the arms.
- the lower ends of the arms are formed with elongate slots 50 as shown in FIGS. 1 and 2 .
- the float structure is mounted to the cleaner body 16 by a connecting means in the form of a U-shaped bracket 52 having laterally projecting pivot shafts 54 with enlarged heads 56 .
- the shafts 54 pass through the slots 50 , with the arms 46 being held captive by the enlarged heads 56 .
- the slots are substantially oversize with respect to the shafts. This enables the float structure 44 not only to slide on the shafts in the direction indicated by the arrow 58 in FIG. 2 but also to tilt laterally about the longitudinal axis of the body 16 .
- FIG. 2 shows the cleaner 10 at the attitude it would normally have when operating on a horizontal submerged surface of the pool.
- the float 48 lifts the float structure to the maximum elevation allowed by sliding movement of the shafts 54 in the slots 50 . It will be understood that the float urges the arms 46 to assume a vertical orientation.
- FIG. 3 illustrates the situation when the cleaner moves onto an upright surface such as a wall of the pool.
- the freedom of movement of the float structure relative to the bracket 52 permitted by the oversize nature of the slots 50 relative to the shafts 54 , allows the float structure to slide and tilt to the illustrated orientation.
- the float applies an upward component of force to the cleaner in order to assist the cleaner to climb the wall.
- the buoyancy effect provided by the float structure can be adjusted to suit particular swimming pools.
- the bracket 52 is made of a somewhat resilient plastics material. Referring to FIG. 3 it will be seen that the arms 52 . 1 of the bracket 52 carry reentrant clipping formations 62 which, as a result of the resilience of the material, make clipping engagement in longitudinally extending recesses 64 in the tubular structure 14 . By drawing the arms 52 . 1 apart from one another it is possible to unclip the bracket from the tubular structure. The float structure can then be relocated on the tubular structure at different longitudinal positions as indicated, by way of example, by the broken outline 66 in FIG. 2 . As described in WO 2005/038170 the recesses 64 are formed with a series of transverse, longitudinally spaced ribs 68 defining a plurality of longitudinal positions at which the float structure can selectively be attached to the cleaner body.
- the adjustability of the longitudinal position of the float structure on the cleaner body enables a user to tune the operation of the cleaner to suit the particular swimming pool in which the cleaner is used. It is anticipated that selective adjustments to the position of the float structure can enable a user to modify the performance of the cleaner to enhance its ability to extricate itself from tight spots in the pool where the cleaner might otherwise jam, it is believed that the ability of the float structure to slide and tilt relative to the cleaner body will also enhance the chances of the cleaner freeing itself from particularly tight spots.
- the cleaner body has a bump strip 70 , the purpose of which is described in WO 2005/038170, attached to it. It may in addition include a part-circular bumper as described in that application.
- the hammer 32 has flat sides 80 , 81 .
- edge regions of these flat sides seat against upper and lower shoulders 82 , 84 in the chamber.
- the shoulders converge towards one another in a downstream direction.
- the shoulders are rebated at positions close to the narrow downstream end 33 of the chamber.
- channels 86 , 88 are formed which extend from the interior of the chamber into the downstream outlet space 15 leading to the tubular structure 14 .
- FIG. 7 shows the cross-sectional shape of a shoulder, in this case one of the shoulders 84 .
- the shoulder has a portion 84 . 1 which is parallel to the edge region of the flat hammer surface 81 . Thus this edge region can make a good seal on the shoulder at the end of the downward stroke of the hammer.
- the shoulder has a sloping portion 84 . 2 which makes an acute angle with the side wall 92 of the valve chamber 30 . It is anticipated that the presence of this sloping portion will make it more difficult for particulate matter to rest permanently on the shoulder and thereby prevent proper seating of the hammer. Particles will tend to fail laterally off the shoulder. Also, as the hammer surface approaches the shoulder, water displaced laterally will, it is believed, tend to move any particulate matter sideways into the chamber to be removed therefrom in the main suction flow.
- all the shoulders 82 , 84 will be provided with similar sloping portions. In other embodiments, the entire shoulder 82 , 84 may be arranged at a slope.
- FIGS. 8 and 9 illustrate another embodiment of the invention.
- the arms 46 of the float structure 44 in this embodiment have a fixed length and the float 48 has a somewhat more rounded and aesthetically pleasing shape. This is provided by a moulded plastic casing which can either be hollow or house lightweight foam material.
- the slots 50 are oversize with respect to the pivot shafts 54 , thereby allowing the float structure to slide and tilt in the preferred manner.
- the underslung weight 45 in the embodiment of FIGS. 8 and 9 is somewhat shorter than the corresponding weight in the first embodiment. This provides for greater clearance between the underside of the weight and the footpad 20 and skirt 22 , thereby allowing the skirt 22 to flex more than otherwise would be the case in situations where the cleaner has to negotiate sharp transitions between, say, the floor and side wall of a pool.
- FIGS. 8 and 9 includes a different solution in which a balancing weight is located adjustably on the cleaner itself.
- the adjustable weight 100 includes a lead body 102 encapsulated in a plastic sheath 104 attached to a clipping bracket 106 similar to the bracket 52 .
- the bracket 106 is shown clipped to the tubular structure 14 at a relatively high position. Such a position would be selected in situations where relatively large buoyancy forces are in operation.
- the swivel arrangement 17 is illustrated in cross-section in FIG. 10 . It includes an annular insert 110 having a spigot 110 . 1 which fits into the end of the tubular structure 14 and a flange 110 . 2 . It also includes another tubular insert 112 having a spigot 112 . 1 onto which the end of the flexible hose 114 fits and a flange 112 . 2 . Between the inserts 110 and 112 there is a swivel ring 116 made of a low friction plastics material such as acetal. The surfaces of the ring 116 are formed with annular grooves or recesses 116 . 1 . Finally, the arrangement 17 includes a union nut 118 through which the spigot 112 . 1 projects and which is internally threaded at 118 . 1 for engagement with the externally threaded end 14 . 1 of the tubular structure 14 . The union nut holds the components of the swivel arrangement together as seen in FIG. 10 .
- the assembled arrangement is such that when the union nut is tight the flanges 110 . 2 and 112 . 2 can slide freely on the opposite surfaces of the ring 116 .
- the presence of the recesses 116 . 1 reduces the contact area between the respective flanges and the ring and thereby limits the frictional resistance to free sliding.
- the sliding movement which is achieved at the two interfaces is sufficient to allow substantially free rotation of the hose 114 relative to the pool cleaner, and hence obviates undesirable twisting of the hose which could detract from random movement of the pool cleaner, even when suction in the hose urges the components of the swivel arrangement towards one another.
- upper refers to an orientation of the cleaner as seen in FIG. 2 , i.e. with the cleaner acting on a horizontal surface.
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Abstract
A suction-type swimming pool cleaner having an elongate body formed by a suction head and an elongate, tubular structure extending from the suction head, the orientation of the body being at least partially controlled by arms carrying a float and a connection bracket connecting the arms in a releasable manner to the body, to allow the float to be connected to the body at any selected one of a number of different positions along the body length, the head includes a valve chamber having a wedge-shaped hammer oscillating in the chamber responsive to suction flow through the head, the hammer seating against shoulders in the chamber, the shoulders being partially rebated and partially sloped to ensure that they are flushed clean of any particulate matter which could interfere with proper hammer seating.
Description
- THIS invention relates to a suction type pool cleaner.
- Suction-type pool cleaners are well known and have been in widespread use for a number of years. Generally suction-type pool cleaners are connected by a flexible hose to a suction point, typically a suction inlet at the weir of a swimming pool. The cleaner operates on the submerged surface of the pool and water is sucked through it by the pump of the swimming pool filtration unit.
- One particularly popular suction-type pool cleaner has a valve chamber with an inlet which in operation is situated near to the submerged surface and through which a water flow is sucked. The chamber accommodates a valve member or hammer which oscillates under the influence of the suction flow and which directs the flow alternately to one or the other of a pair of outlet passages leading away from the valve chamber to the hose. The resulting variations in momentum of the water flow as well as variations in the suction effect at the inlet cause the cleaner to move, preferably in a random manner, over the submerged surfaces of the pool.
- Problems which are frequently experienced with suction-type pool cleaners are the following:
-
- 1. Inability of the cleaner to climb the upright walls of the swimming pool in order to perform a cleaning action there.
- 2. Jamming of the pool cleaner in tight spots in the pool, for example against steps leading into the pool; and inability of the cleaner to extricate itself.
- 3. In the case of suction-type pool cleaners which incorporate an oscillating hammer, failure of the hammer to seat properly at either end of its stroke in the valve chamber. Such failure is generally attributable to particulate matter, for example grass seeds or stone particles, that come to rest on the valve chamber surfaces against which the hammer is designed to seat. Improper seating of the hammer can distort the suction effects to the extent that pool cleaner can come to a complete standstill.
- The invention provides a suction-type pool cleaner having an elongate body, a float structure including a float, arms carrying the float and means for connecting the arms releasably to the body at a selected one of a plurality of different positions along the length of the body.
- Preferably the connecting means is configured to allow the float structure to pivot relative to the body both about a lateral axis transverse to the body and about the longitudinal axis of the body. The connecting means may comprise a bracket which is shaped to make releasable, clipping engagement with the body at any one of a plurality of positions along the length of the body and which carries laterally projecting pivot shafts, and the float structure comprises a pair of laterally spaced arms formed with elongate slots through which the shafts extend, the float being supported between the arms at a position remote from the slots and the slots being oversize with respect to the shafts to allow the float structure to pivot and tilt relative to the bracket and hence relative to the body. The arms themselves may be of adjustable length.
- Further according to the invention, the cleaner comprises a valve chamber having an inlet and an outlet and a hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer, at least portions of the shoulders sloping at an acute angle relative to the side walls of the suction chamber. Each shoulder may include a first portion oriented at right angles to the relevant side wall and a second portion which extends from the first portion at an acute angle relative to the side wall.
- Still further according to the invention, the cleaner comprises a valve chamber of tapering shape having an inlet and an outlet and a wedge-shaped hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer, wherein the shoulders converge in a downstream direction towards a relatively narrow end of the chamber in which a relatively narrow end of the hammer is located, the shoulders being rebated at positions towards the narrow end of the chamber end so as to define flushing channels through which particulate matter can be flushed from the chamber by the suction flow.
- The cleaner may have a suction head and an elongate body extending in a downstream direction from the head, a balancing weight and means for attaching the balancing weight releasably to the elongate body at a selected one of a plurality of different positions along the length of the body. The attaching means may be a bracket which carries the weight and which can be clipped selectively to the body at any selected one of the different positions. The weight may be encapsulated in a sheath carried by the bracket.
- Advantageously, the pool cleaner includes, at an operatively downstream end of the elongate body, a swivel arrangement by means of which the cleaner is attachable in use to a flexible suction hose, the swivel arrangement including a first flanged member engagable with the end of the body, a second flanged member engagable with the hose, a swivel ring located between the flanges of the first and second members and means for holding the assembly of members and swivel ring together such that the flanges of the members can slide rotationally on the ring.
- The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:
-
FIG. 1 shows a perspective view of a suction-type pool cleaner according to the invention; -
FIG. 2 shows a side view of the suction-type pool cleaner ofFIG. 1 ; -
FIG. 3 shows a cross-section at the line 3-3 inFIG. 2 ; -
FIG. 4 shows a fragmentary perspective view of the head of the body of the pool cleaner; -
FIG. 5 shows a cross-section at the line 5-5 inFIG. 4 ; -
FIG. 6 shows a cross-section at the line 6-6 inFIG. 5 ; -
FIG. 7 shows a cross-section at the line 7-7 inFIG. 6 ; -
FIG. 8 shows a partially exploded perspective view of a pool cleaner according to another embodiment of the invention; -
FIG. 9 shows a side view of the pool cleaner seen inFIG. 8 ; -
FIG. 10 shows a cross-sectional view of the swivel arrangement; and -
FIG. 11 shows a perspective view of a swivel ring forming part of the arrangement seen inFIG. 10 . - The pool cleaners 10 illustrated in
FIGS. 1 to 7 and inFIGS. 8 and 9 have many similarities to the cleaner described and illustrated in international patent application PCT/IB2004/002338 (=WO 2005/038170), to which reference should be made. - Referring to
FIGS. 1 to 7 , the cleaner 10 has a cleaner orsuction head 12 and atubular structure 14 which mates, as described in WO 2005/038170, with thehead 12 to form a composite,elongate body 16. The head terminates at its operatively lower end in acircular foot 18 to which anannular footpad 20 is fitted. The inner extremity of a flexible,annular skirt 22 is fitted over thefoot 18 as illustrated. The footpad and skirt are not shown inFIGS. 4 and 5 . - The
foot 18 defines an entrance opening 19 leading through anentrance space 24 to aninlet 26 in acover member 28.Side openings 21 also lead into thespace 24. Theinlet 26 leads into avalve chamber 30 which is of tapering shape. The chamber has a relatively narrowdownstream end 33 and a relatively wideupstream end 34 adjacent theinlet 26. Located in thevalve chamber 30 is a wedge-shaped hammer 32 having a relativelynarrow end 38, locating at the relativelynarrow end 33 of the chamber, and a relativelywide end 40. - The
tubular structure 14 has side-by-side internal passages 14.1 and 14.2 of oval or elliptical shape as shown inFIG. 3 . These passages communicate at their upstream or operatively lower ends, via anoutlet space 15, with thedownstream end 33 of the valve chamber when thetubular structure 14 is connected to thehead 12 as shown inFIG. 1 . - The downstream end of the
tubular structure 14 is connected in use, via aswivel arrangement 17, to a flexible hose 114 (FIG. 10 ) extending from a suction point in a swimming pool, typically the suction inlet in the weir structure of the pool. Theswivel arrangement 17 is described below in more detail with reference toFIGS. 10 and 11 . - In use, the footpad and skirt locate against a submerged surface in the pool. Suction applied at the suction inlet of the pool by the associated pool pump and filtration unit draws water from the region of the submerged surface through the entrance opening 19,
side openings 21,entrance space 24,inlet 26,valve chamber 30,outlet space 15 and passages 14.1, 14.2. The suction flow through the valve chamber causes thehammer 32 to oscillate back and forth in the chamber as indicated by thearrow 42 inFIG. 5 . As described previously, this oscillation of the hammer causes the cleaner to move, preferably in a generally random manner, about the submerged surface of the pool. Submerged debris is extracted from the pool by suction through the pool cleaner and hose. - It is important for a suction-type pool cleaner to maintain an appropriate attitude relative to the submerged surface inter alia so that the footpad and skirt can locate properly against the submerged surface in order to achieve the desired suction effect. It is conventional practice in a suction-type pool cleaner to incorporate some or other means providing appropriate buoyancy, and also weighting, to the cleaner body to maintain it at the desired attitude. In WO 2005/038170 the necessary buoyancy is incorporated in the moulded walls of the body itself. In addition to internal buoyancy as described in the international application, or as an alternative thereto, the illustrated embodiment includes a float structure indicated generally by the numeral 44. It also includes an
underslung weight 45 as described in WO 2005/038170. - The
float structure 44 includes a pair of elongate,parallel arms 46 and afloat 48 attached to and supported between the arms. The lower ends of the arms are formed withelongate slots 50 as shown inFIGS. 1 and 2 . The float structure is mounted to thecleaner body 16 by a connecting means in the form of aU-shaped bracket 52 having laterally projectingpivot shafts 54 withenlarged heads 56. Theshafts 54 pass through theslots 50, with thearms 46 being held captive by the enlarged heads 56. The slots are substantially oversize with respect to the shafts. This enables thefloat structure 44 not only to slide on the shafts in the direction indicated by thearrow 58 inFIG. 2 but also to tilt laterally about the longitudinal axis of thebody 16. -
FIG. 2 shows the cleaner 10 at the attitude it would normally have when operating on a horizontal submerged surface of the pool. In this situation, thefloat 48 lifts the float structure to the maximum elevation allowed by sliding movement of theshafts 54 in theslots 50. It will be understood that the float urges thearms 46 to assume a vertical orientation. -
FIG. 3 illustrates the situation when the cleaner moves onto an upright surface such as a wall of the pool. In this situation, the freedom of movement of the float structure relative to thebracket 52, permitted by the oversize nature of theslots 50 relative to theshafts 54, allows the float structure to slide and tilt to the illustrated orientation. At this orientation, the float applies an upward component of force to the cleaner in order to assist the cleaner to climb the wall. - It will be understood that the interaction of the
shafts 54 andslots 50 allows the float structure to tilt in the opposite direction, indicated by thebroken lines 60, should the cleaner encounter a wall when the cleaner is moving in the opposite direction. - The buoyancy effect provided by the float structure can be adjusted to suit particular swimming pools. The
bracket 52 is made of a somewhat resilient plastics material. Referring toFIG. 3 it will be seen that the arms 52.1 of thebracket 52 carryreentrant clipping formations 62 which, as a result of the resilience of the material, make clipping engagement in longitudinally extendingrecesses 64 in thetubular structure 14. By drawing the arms 52.1 apart from one another it is possible to unclip the bracket from the tubular structure. The float structure can then be relocated on the tubular structure at different longitudinal positions as indicated, by way of example, by the broken outline 66 inFIG. 2 . As described in WO 2005/038170 therecesses 64 are formed with a series of transverse, longitudinally spacedribs 68 defining a plurality of longitudinal positions at which the float structure can selectively be attached to the cleaner body. - The adjustability of the longitudinal position of the float structure on the cleaner body enables a user to tune the operation of the cleaner to suit the particular swimming pool in which the cleaner is used. It is anticipated that selective adjustments to the position of the float structure can enable a user to modify the performance of the cleaner to enhance its ability to extricate itself from tight spots in the pool where the cleaner might otherwise jam, it is believed that the ability of the float structure to slide and tilt relative to the cleaner body will also enhance the chances of the cleaner freeing itself from particularly tight spots.
- The cleaner body has a
bump strip 70, the purpose of which is described in WO 2005/038170, attached to it. It may in addition include a part-circular bumper as described in that application. - The
hammer 32 has flat sides 80, 81. During oscillation of the hammer in thevalve chamber 30, edge regions of these flat sides seat against upper andlower shoulders FIG. 5 the shoulders converge towards one another in a downstream direction. As also shown inFIG. 6 , the shoulders are rebated at positions close to the narrowdownstream end 33 of the chamber. As aresult channels downstream outlet space 15 leading to thetubular structure 14. - In use water flow is sucked through the valve chamber and causes the hammer to oscillate. At the end of the upward stroke of the hammer the edge regions of the side 80 seat on the
shoulders 82. A portion of the water flow can flow through theopen channels - The flushing of particulate matter as just described will, it is believed, reduce the chances of the hammer being prevented from seating properly by particles in the valve chamber.
-
FIG. 7 shows the cross-sectional shape of a shoulder, in this case one of theshoulders 84. It will be seen that the shoulder has a portion 84.1 which is parallel to the edge region of the flat hammer surface 81. Thus this edge region can make a good seal on the shoulder at the end of the downward stroke of the hammer. In addition, the shoulder has a sloping portion 84.2 which makes an acute angle with theside wall 92 of thevalve chamber 30. It is anticipated that the presence of this sloping portion will make it more difficult for particulate matter to rest permanently on the shoulder and thereby prevent proper seating of the hammer. Particles will tend to fail laterally off the shoulder. Also, as the hammer surface approaches the shoulder, water displaced laterally will, it is believed, tend to move any particulate matter sideways into the chamber to be removed therefrom in the main suction flow. - In practice, all the
shoulders entire shoulder - In combination, it is anticipated that the
channels shoulders -
FIGS. 8 and 9 illustrate another embodiment of the invention. Thearms 46 of thefloat structure 44 in this embodiment have a fixed length and thefloat 48 has a somewhat more rounded and aesthetically pleasing shape. This is provided by a moulded plastic casing which can either be hollow or house lightweight foam material. As in the first embodiment, theslots 50 are oversize with respect to thepivot shafts 54, thereby allowing the float structure to slide and tilt in the preferred manner. - The
underslung weight 45 in the embodiment ofFIGS. 8 and 9 is somewhat shorter than the corresponding weight in the first embodiment. This provides for greater clearance between the underside of the weight and thefootpad 20 andskirt 22, thereby allowing theskirt 22 to flex more than otherwise would be the case in situations where the cleaner has to negotiate sharp transitions between, say, the floor and side wall of a pool. - In the operation of conventional suction type submerged pool cleaners it is recognized that buoyancy forces acting on the suction hose itself can detrimentally affect the balance and random movement of the cleaner as whole. This is particularly so when the pool is relatively deep and there is accordingly a substantial length of submerged hose.
- To counter these buoyancy forces on the hose it has been conventional practice to mount a weight on the hose itself. Generally the weight includes a lead ring which can be adjustably positioned along the length of the hose in order to achieve optimum balance of the cleaner. Apart from difficulties in achieving the required balance at the outset, wear may make it possible for the weight to migrate downwardly on the hose, thereby upsetting that balance. The embodiment of
FIGS. 8 and 9 includes a different solution in which a balancing weight is located adjustably on the cleaner itself. - The
adjustable weight 100 includes alead body 102 encapsulated in aplastic sheath 104 attached to aclipping bracket 106 similar to thebracket 52. InFIGS. 8 and 9 thebracket 106 is shown clipped to thetubular structure 14 at a relatively high position. Such a position would be selected in situations where relatively large buoyancy forces are in operation. - However, as indicated by the broken line position in
FIG. 9 , it is possible to reposition the bracket, and hence the weight, selectively at a lower position in order to achieve appropriate balance for situations in which the buoyancy forces are smaller. - The
swivel arrangement 17 is illustrated in cross-section inFIG. 10 . It includes anannular insert 110 having a spigot 110.1 which fits into the end of thetubular structure 14 and a flange 110.2. It also includes anothertubular insert 112 having a spigot 112.1 onto which the end of theflexible hose 114 fits and a flange 112.2. Between theinserts swivel ring 116 made of a low friction plastics material such as acetal. The surfaces of thering 116 are formed with annular grooves or recesses 116.1. Finally, thearrangement 17 includes aunion nut 118 through which the spigot 112.1 projects and which is internally threaded at 118.1 for engagement with the externally threaded end 14.1 of thetubular structure 14. The union nut holds the components of the swivel arrangement together as seen inFIG. 10 . - The assembled arrangement is such that when the union nut is tight the flanges 110.2 and 112.2 can slide freely on the opposite surfaces of the
ring 116. The presence of the recesses 116.1 reduces the contact area between the respective flanges and the ring and thereby limits the frictional resistance to free sliding. The sliding movement which is achieved at the two interfaces is sufficient to allow substantially free rotation of thehose 114 relative to the pool cleaner, and hence obviates undesirable twisting of the hose which could detract from random movement of the pool cleaner, even when suction in the hose urges the components of the swivel arrangement towards one another. - The terms “upper”, “lower” and like used in this specification refer to an orientation of the cleaner as seen in
FIG. 2 , i.e. with the cleaner acting on a horizontal surface.
Claims (19)
1. A suction-type pool cleaner comprising:
an elongated body, and
a float structure including a float, arms carrying the float and means for connecting the arms releasably to the body at a selected one of a plurality of different positions along the length of the body.
2. A pool cleaner according to claim 1 wherein the connecting means is configured to allow the float structure to pivot relative to the body both about a lateral axis transverse to the body and about the longitudinal axis of the body.
3. A pool cleaner to claim 2 wherein the connecting means comprises:
a bracket which is shaped to make releasable, clipping engagement with the body at any one of the plurality of positions along the length of the body and which carries laterally projecting pivot shafts;
the float structure comprises a pair of laterally spaced arms formed with elongated slots through which the shafts extend; and
the float being supported between the arms at a position remote from the slots and the slots being oversize with respect to the shafts to allow the float structure to pivot and tilt relative to the bracket and hence relative to the body.
4. A pool cleaner according to claim 3 wherein the arms are of adjustable length.
5. A pool cleaner according to claim 1 wherein the cleaner comprises:
a valve chamber having an inlet and an outlet and a hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, and
the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer, at least portions of the shoulders sloping at an acute angle relative to the side walls of the suction chamber.
6. A pool cleaner according to claim 5 wherein each shoulder includes a first portion oriented at right angles to the relevant side wall and a second portion which extends from the first portion at an acute angle relative to the side wall.
7. A pool cleaner according to claim 1 wherein the cleaner comprises a valve chamber of tapering shape having an inlet and an outlet and a wedge-shaped hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer sent during oscillation of the hammer, wherein the shoulders converge in a downstream direction towards a relatively narrow end of the chamber in which a relatively narrow end of the hammer is located, the shoulders being rebated at positions towards the narrow end of the chamber end so as to define flushing channels through which particulate matter can be flushed from the chamber of the suction flow.
8. A pool cleaner according to claim 1 wherein the cleaner has a suction head and an elongated body extending in a downstream direction from the head, a balancing weight and means for attaching the balancing weight releasably to the elongated body at a selected one of a plurality of different positions along the length of the body.
9. A pool cleaner according to claim 8 wherein the attaching means is a bracket for carrying the weight and which can be clipped selectively to the body at any selected one of the different positions.
10. A pool cleaner according to claim 9 wherein the weight is encapsulated in a sheath carried by the bracket.
11. A pool cleaner according to claim 1 wherein the cleaner includes:
at an operatively downstream end of the elongated body, a swivel arrangement by means for attachment of the cleaner when in use to a flexible suction hose, and
the swivel arrangement includes a first flanged member engageable with the end of the body, a second flanged member engagable with the hose, a swivel ring located between the flanges of the first and second members and means for holding the assembly of members and swivel ring together such that the flanges of the members can slide rotationally on the ring.
12. A pool cleaner according to claim 11 wherein the swivel ring has opposite surfaces formed with recesses therein.
13. A pool cleaner according to claim 11 wherein the means for holding the assembly of member and swivel ring together is a union nut engageable with a threaded end of the elongated body.
14. A suction-type pool cleaner comprising:
a valve chamber in the body having an inlet and an outlet and a hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet, and
the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer, at least portions of the shoulders sloping at an acute angle relative to the side walls of the suction chamber.
15. A pool cleaner according to claim 14 wherein each shoulder includes:
a first portion oriented at right angles to the relevant side wall, and
a second portion which extends from the first portion at an acute angle relative to the sides wall.
16. A suction-type pool cleaner comprising:
a valve chamber of tapering shape in the body having an inlet and an outlet and a wedge-shaped hammer arranged to oscillate in the chamber under the effects of suction flow through the chamber from the inlet to the outlet,
the chamber having side walls each formed with spaced apart shoulders against which side edge surfaces of the hammer seat during oscillation of the hammer;
the shoulders converging in a downstream direction towards a relatively narrow end of the chamber in which a relatively narrow end of the hammer is located, and
the shoulders being rebated at positions towards the narrow end of the chamber end so as to define flushing channels through which particulate matter can be flushed from the chamber of the suction flow.
17. A suction-type cleaner comprising:
an elongated body formed by a suction head,
an elongated tubular structure extending from the suction head,
a balancing weight, and
means for attaching the balancing weight releasably to the tubular structure at a selected one of a plurality of different positions along the length of the structure.
18. A pool cleaner to claim 1 wherein the connecting means comprises:
a bracket which is shaped to make releasable, clipping engagement with the body at any one of the plurality of positions along the length of the body and which carries laterally projecting pivot shafts;
the float structure comprises a pair of laterally spaced arms formed with elongated slots through which the shafts extend; and
the float being supported between the arms at a position remote from the slots and the slots being oversize with respect to the shafts to allow the float structure to pivot and tilt relative to the bracket and hence relative to the body.
19. A pool cleaner according to claim 12 wherein the means for holding the assembly of member and swivel ring together is a union nut engageable with a threaded end of the elongated body.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ZA200503064 | 2005-04-14 | ||
ZA200505698 | 2005-07-15 | ||
IBPCT/IB2006/000679 | 2006-03-27 | ||
PCT/IB2006/000679 WO2006109118A1 (en) | 2005-04-14 | 2006-03-27 | Suction-type pool cleaner |
Publications (1)
Publication Number | Publication Date |
---|---|
US20080276388A1 true US20080276388A1 (en) | 2008-11-13 |
Family
ID=36571013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/872,194 Abandoned US20080276388A1 (en) | 2005-04-14 | 2008-05-20 | Suction-type pool cleaner |
Country Status (4)
Country | Link |
---|---|
US (1) | US20080276388A1 (en) |
EP (1) | EP1875018A1 (en) |
AU (1) | AU2006233280A1 (en) |
WO (1) | WO2006109118A1 (en) |
Cited By (20)
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US20070089228A1 (en) * | 2005-10-24 | 2007-04-26 | Sidler Steven R | Apparatus and Methods for Removing Insects From Swimming Pools and the Like |
US20100139017A1 (en) * | 2007-02-06 | 2010-06-10 | Herman Stoltz | Swimming pool cleaner |
US20110024339A1 (en) * | 2009-07-30 | 2011-02-03 | Injecta Plastics (Pty) Ltd. | Swimming pool cleaner |
US20110088180A1 (en) * | 2009-10-19 | 2011-04-21 | James Edward Kellogg | Pool cleaners |
US20120103365A1 (en) * | 2010-11-02 | 2012-05-03 | Jirawat Sumonthee | Pool Cleaning Device With Adjustable Buoyant Element |
US8307485B2 (en) | 2008-09-16 | 2012-11-13 | Hayward Industries, Inc. | Apparatus for facilitating maintenance of a pool cleaning device |
US8784652B2 (en) | 2010-09-24 | 2014-07-22 | Poolvergnuegen | Swimming pool cleaner with a rigid debris canister |
US20140284258A1 (en) * | 2009-10-19 | 2014-09-25 | Pool Systems Pty Ltd | Pool cleaners |
AU2009227831B2 (en) * | 2009-10-19 | 2015-09-03 | Pool Systems Pty Ltd | Improvements in or in relation to pool cleaners |
US9593502B2 (en) | 2009-10-19 | 2017-03-14 | Hayward Industries, Inc. | Swimming pool cleaner |
USD787760S1 (en) | 2014-11-07 | 2017-05-23 | Hayward Industries, Inc. | Pool cleaner |
USD787761S1 (en) | 2014-11-07 | 2017-05-23 | Hayward Industries, Inc. | Pool cleaner |
USD789003S1 (en) | 2014-11-07 | 2017-06-06 | Hayward Industries, Inc. | Pool cleaner |
USD789624S1 (en) | 2014-11-07 | 2017-06-13 | Hayward Industries, Inc. | Pool cleaner |
US9677294B2 (en) | 2013-03-15 | 2017-06-13 | Hayward Industries, Inc. | Pool cleaning device with wheel drive assemblies |
USD790786S1 (en) * | 2015-09-30 | 2017-06-27 | Jean Julien Bruneel | Portable pool cleaner |
USD790784S1 (en) * | 2015-09-30 | 2017-06-27 | Kokido Development Limited | Automatic pool cleaner |
US10066411B2 (en) | 2013-08-30 | 2018-09-04 | Hayward Industries, Inc. | Swimming pool cleaner |
US10161153B2 (en) | 2017-05-11 | 2018-12-25 | Hayward Industries, Inc. | Pool cleaner canister handle |
US10161154B2 (en) | 2013-03-14 | 2018-12-25 | Hayward Industries, Inc. | Pool cleaner with articulated cleaning members and methods relating thereto |
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WO2008096324A2 (en) * | 2007-02-07 | 2008-08-14 | Aquavac Pool Technologies (Proprietary) Limited | Pool cleaner device |
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US20100139017A1 (en) * | 2007-02-06 | 2010-06-10 | Herman Stoltz | Swimming pool cleaner |
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US20110088180A1 (en) * | 2009-10-19 | 2011-04-21 | James Edward Kellogg | Pool cleaners |
US9758979B2 (en) | 2009-10-19 | 2017-09-12 | Hayward Industries, Inc. | Swimming pool cleaner |
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AU2009227831B2 (en) * | 2009-10-19 | 2015-09-03 | Pool Systems Pty Ltd | Improvements in or in relation to pool cleaners |
US8784652B2 (en) | 2010-09-24 | 2014-07-22 | Poolvergnuegen | Swimming pool cleaner with a rigid debris canister |
AU2011242144B2 (en) * | 2010-11-02 | 2017-03-02 | Hayward Industries, Inc. | Pool Cleaning Device With Adjustable Buoyant Element |
US20130000677A1 (en) * | 2010-11-02 | 2013-01-03 | Hayward Industries, Inc. | Pool Cleaning Device With Adjustable Buoyant Element |
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US10161154B2 (en) | 2013-03-14 | 2018-12-25 | Hayward Industries, Inc. | Pool cleaner with articulated cleaning members and methods relating thereto |
US9677294B2 (en) | 2013-03-15 | 2017-06-13 | Hayward Industries, Inc. | Pool cleaning device with wheel drive assemblies |
US10066411B2 (en) | 2013-08-30 | 2018-09-04 | Hayward Industries, Inc. | Swimming pool cleaner |
US10876318B2 (en) | 2013-08-30 | 2020-12-29 | Hayward Industries, Inc. | Swimming pool cleaner |
US10947750B2 (en) | 2013-08-30 | 2021-03-16 | Hayward Industries, Inc. | Swimming pool cleaner |
US12018510B2 (en) | 2013-08-30 | 2024-06-25 | Hayward Industries, Inc. | Swimming pool cleaner |
USD789624S1 (en) | 2014-11-07 | 2017-06-13 | Hayward Industries, Inc. | Pool cleaner |
USD789003S1 (en) | 2014-11-07 | 2017-06-06 | Hayward Industries, Inc. | Pool cleaner |
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USD787760S1 (en) | 2014-11-07 | 2017-05-23 | Hayward Industries, Inc. | Pool cleaner |
USD790786S1 (en) * | 2015-09-30 | 2017-06-27 | Jean Julien Bruneel | Portable pool cleaner |
USD790784S1 (en) * | 2015-09-30 | 2017-06-27 | Kokido Development Limited | Automatic pool cleaner |
US10161153B2 (en) | 2017-05-11 | 2018-12-25 | Hayward Industries, Inc. | Pool cleaner canister handle |
Also Published As
Publication number | Publication date |
---|---|
EP1875018A1 (en) | 2008-01-09 |
WO2006109118A1 (en) | 2006-10-19 |
AU2006233280A1 (en) | 2006-10-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: INTEGRATED POOL PRODUCTS (PROPRIETARY) LIMITED, SO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DODD, BRIAN JESSE;REEL/FRAME:020977/0598 Effective date: 20080513 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |