WO2008059449A2 - Muscle-powered water pump - Google Patents

Muscle-powered water pump Download PDF

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Publication number
WO2008059449A2
WO2008059449A2 PCT/IB2007/054630 IB2007054630W WO2008059449A2 WO 2008059449 A2 WO2008059449 A2 WO 2008059449A2 IB 2007054630 W IB2007054630 W IB 2007054630W WO 2008059449 A2 WO2008059449 A2 WO 2008059449A2
Authority
WO
WIPO (PCT)
Prior art keywords
water pump
muscle
drive
powered
rotation
Prior art date
Application number
PCT/IB2007/054630
Other languages
French (fr)
Other versions
WO2008059449A3 (en
Inventor
William John Bramley
Paul Alan Deane
Original Assignee
William John Bramley
Paul Alan Deane
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by William John Bramley, Paul Alan Deane filed Critical William John Bramley
Publication of WO2008059449A2 publication Critical patent/WO2008059449A2/en
Publication of WO2008059449A3 publication Critical patent/WO2008059449A3/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B5/00—Use of pumping plants or installations; Layouts thereof
    • E03B5/04—Use of pumping plants or installations; Layouts thereof arranged in wells
    • E03B5/045—Use of pumping plants or installations; Layouts thereof arranged in wells with surface tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G5/00—Devices for producing mechanical power from muscle energy
    • F03G5/02—Devices for producing mechanical power from muscle energy of endless-walk type, e.g. treadmills
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/02—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level
    • F04B47/024—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps the driving mechanisms being situated at ground level actuated by muscle power
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1861—Rotary generators driven by animals or vehicles

Definitions

  • THIS INVENTION relates to a muscle-powered water pump installation.
  • the invention relates also to a playground roundabout installation.
  • the invention is expected to be particularly advantageously applicable in rural areas where running potable water and electricity is not freely available.
  • a muscle-powered water pump installation which includes: a drive formation supported for rotation about a drive formation rotational axis by at least one animal or human; a water pump drivingly connected to the drive formation for pumping water from a water supply in response to rotation of the drive formation; and an auxiliary rotary power take-off drivingly connected to the drive formation for providing rotational power in response to rotation of the drive formation.
  • the muscle-powered water pump installation may include a support formation anchored to the ground, the drive formation being rotatably supported by the support formation.
  • Any one of the water pump and the auxiliary power take-off may be drivingly connected to a drive formation drive shaft by means of a drive assembly.
  • the drive assembly may include a gearbox for converting a low speed high torque input provided by the drive formation to a high speed low torque output.
  • At least one of the water pump and the power take-off may be driven at high speed and low torque in response to rotation of the drive formation.
  • the drive assembly may be configured for driving the water pump in response to rotation of the drive formation in one direction, and for driving the auxiliary power take-off in response to rotation of the drive formation in the other direction.
  • the drive assembly may include a rotational input dhvingly connected to the drive formation and to the gearbox, the gearbox having at least one output shaft.
  • the drive assembly may include two one-directional rotation transfer mechanisms, each of the one-directional rotation transfer mechanisms respectively associated with the water pump and the auxiliary power take-off, the one-directional rotation transfer mechanisms being arranged in opposing configurations, i.e. one of them will transfer rotational motion in response to rotation of the drive formation in a clockwise direction, the other transferring rotational motion in response to rotation of the drive formation in a counterclockwise direction.
  • the muscle-powered water pump installation may include an activatable disengaging mechanism, for example a switch or the like, typically associated with the auxiliary power take-off, for disengaging, when activated, transfer of rotational motion from the drive formation to the auxiliary power take-off.
  • an activatable disengaging mechanism for example a switch or the like, typically associated with the auxiliary power take-off, for disengaging, when activated, transfer of rotational motion from the drive formation to the auxiliary power take-off.
  • the installation provides for rotation of the drive formation in one direction without a load, i.e. the water pump or the auxiliary power take-off, being coupled thereto.
  • At least one one-directional rotation transfer mechanism may be in the form of a slip clutch or a one-directional bearing.
  • the support formation may include an elongated casing anchored to the ground, the casing defining an interior which has a non-circular cross-sectional profile.
  • the drive assembly may be at least partially located in the casing, that part of the drive assembly located in the casing having a non-circular cross-sectional profile corresponding to that of the interior of the casing, thereby to resist rotation of the drive assembly relative to the casing.
  • the gearbox which may be in the form of a planetary gearbox, may have a non-circular cross-sectional profile.
  • at least part of the drive assembly may be located in a drive assembly housing.
  • the gearbox may include only one output shaft, both the water pump and the auxiliary power output being connected to the output shaft via their associated one- directional rotation transfer mechanisms.
  • the gearbox may include two, typically co-axial, output shafts, the water pump and the auxiliary power take-off being drivingly connected, via their one- directional rotation transfer mechanisms to the respective output shafts.
  • the muscle-powered water pump installation may include at least one rotationally driven device drivingly connected to the auxiliary power take-off.
  • the rotationally driven device may be in the form of a generator for generating electricity in response to rotation of the drive formation in one direction.
  • the muscle-powered water pump installation may include an electric storage arrangement.
  • the electric storage arrangement may include a battery charger connected to the electric generator for charging at least one electrochemical battery upon generation of electricity by the generator.
  • an electrical device can be connected to the cell or battery, the cell or battery thus supplying electrical power to a said device.
  • the drive assembly may be provided with a further rotational power take-off which, in response to rotation of the drive formation in one direction, typically the same direction which causes the auxiliary power take-off to be driven.
  • a rotationally driven device e.g. a washing tub assembly, a grinding assembly, or the like may be connected to the further power take-off.
  • the rotationally driven device may be connected to the auxiliary power takeoff via a drive arrangement, e.g. sprocket wheels and a chain, or pulleys and a V-belt, which drive arrangement, in use, increases rotational speed provided by the drive formation to the rotational input of the drive assembly.
  • a drive arrangement e.g. sprocket wheels and a chain, or pulleys and a V-belt
  • the muscle-powered water pump installation may include a water reservoir in fluid communication with an outlet of the water pump for receiving and storing water pumped from the water supply by the water pump.
  • the water supply will be a borehole or a well.
  • the drive formation may be installed relative to a water supply such that the drive formation rotation axis is substantially co-axial with a longitudinal axis of the water supply.
  • the water pump may be in the form of a positive displacement pump.
  • the drive formation may be in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
  • the upright rotational axis may be substantially co-axial with a longitudinal axis of the water supply.
  • the installation thus employs human muscle power.
  • Rotation of the roundabout in one direction will thus cause water to be pumped from an associated borehole or well, and rotation thereof in the opposite direction will thus cause energy to be generated and, if applicable, a rotationally driven device connected to the further power take-off to be driven.
  • the mechanism can be activated such that rotation of the roundabout in one direction is free rotation, i.e. no load, e.g. the generator and the rotationally driven device, is being driven thereby.
  • the playground roundabout can thus, subject to the direction of rotation thereof, be used, in conventional fashion, as a plaything for a child.
  • a muscle- powered water pump installation which includes: a drive formation supported for rotation about a drive formation rotational axis by at least one animal or human; a generator dhvingly connected to the drive formation for generating electricity in response to rotation of the drive formation; and an electrical water pump powered by electricity generated by the generator for pumping water from a water supply.
  • the muscle-powered water pump installation may include a support formation anchored to the ground, the drive formation being rotatably supported by the support formation.
  • the water pump may be directly electrically connected to the generator, so that the water pump pumps water in response to rotation of the drive formation.
  • the muscle-powered water pump installation may include an electric power storage arrangement for storing electricity in response to rotation of the drive formation.
  • the electric power storage arrangement may comprise a battery charger electrically connected to the generator, and an electrochemical battery charged in use by the battery charger, the water pump being electrically connected to the battery, so that the water pump is powered by electricity stored in the battery.
  • the muscle-powered water pump installation may include a gearbox for converting a low speed high torque input provided by the drive formation to a high speed low torque output.
  • the generator may thus be driven at high speed and low torque in response to rotation of the drive formation.
  • the muscle-powered water pump installation may include a water reservoir in communication with an outlet of the water pump for receiving water pumped by the water pump.
  • the muscle-powered water pump installation may include an auxiliary power take-off.
  • a rotationally driven device may drivingly be connected to the auxiliary power take-off.
  • the electrical water pump may be a submersible pump or a positive displacement pump located the water supply, such as a borehole or a well.
  • the drive formation may be in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
  • the drive formation may be in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
  • a playground roundabout installation which includes: a rotatably supported roundabout; a water pump for pumping water from a water supply; and a rotational power take-off drivingly connected to the roundabout for providing rotational power to drive a rotationally driven device in response to rotation of the roundabout.
  • a playground roundabout installation which includes a rotatably supported roundabout; a generator drivingly connected to the drive formation for generating electricity in response to rotation of the drive formation; and an electrical water pump powered by electricity generated by the generator for pumping water from a water supply.
  • Figure 1 shows, schematically, a side elevation of a muscle-powered water pump installation in accordance with the invention
  • Figure 2 shows, schematically and in part, a top plan elevation of a support formation forming part of the water pump installation shown in Figure 1 ;
  • Figure 3 shows, schematically, a side elevation of the support formation shown in Figure 2;
  • Figure 4 shows, schematically, a top plan elevation of a playground roundabout forming part of the water pump installation shown in Figure 1 ;
  • Figure 5 shows, schematically and on an enlarged scale, a side elevation of an upper part the playground roundabout shown in Figure 4;
  • Figure 6 shows, schematically and on an enlarged scale, a partly axially-sectioned side elevation of part of the playground roundabout shown in Figures 4 and 5, the roundabout including one configuration of a drive assembly;
  • Figure 7 shows, on a slightly enlarged scale, a view corresponding to that shown in Figure 6, but the roundabout including a different configuration of the drive assembly
  • Figure 8 shows, on an enlarged scale, a view corresponding to that shown in Figure 7, but the roundabout including a yet further configuration of a drive assembly.
  • a muscle-powered water pump installation in accordance with the invention is generally designated by reference numeral 10.
  • the installation 10 employs muscle power, in this example provided by at least one human, to pump water from a borehole or well, to generate electricity and, optionally, to drive a further rotationally driven device.
  • muscle power in this example provided by at least one human, to pump water from a borehole or well, to generate electricity and, optionally, to drive a further rotationally driven device.
  • the invention as described and illustrated is thus perfectly suited to be used in rural areas where running potable water and electricity is not readily available.
  • the installation 10 includes a drive formation in the form of a playground roundabout 12 rotatably supported above ground by a support formation 14 (see in particular Figures 2 and 3) for rotation about an operatively upright, typically vertical, axis.
  • a water pump 16 which is in the form of a positive displacement pump (shown in concept only), is dhvingly connected to the roundabout 12, such that rotation of the roundabout 12 about its rotational axis causes operation of the water pump 16.
  • a generator 18 (also shown in concept only) is drivingly connected to the roundabout 12, such that rotation of the roundabout 12 about its rotational axis causes electricity to be generated by means of the generator 18.
  • the installation 10 thus includes an auxiliary power take-off to which the generator 18 is drivingly connected.
  • the installation 10 also includes a further rotational power takeoff drivingly connected to the roundabout 12, such that it too is driven in response to rotation of the roundabout 12.
  • a rotationally driven device such as, for example, a washing tub assembly, a grinding assembly, or the like, is in use driven by the power take-off.
  • the water pump 16, the generator 18 and, where applicable, the further power take-off are all drivingly connected to the roundabout 12 by means of a drive assembly generally designated by reference numeral 22.
  • the drive assembly 22 includes a planetary gearbox 24 for converting a low speed high torque input provided by the roundabout 12 to a low torque high speed output provided to the water pump 16 and, in some instances when desired, to the generator 18 and, where applicable, a rotationally driven device connected to the power take-off 20.
  • the water pump 16 is used to pump water from a borehole or well.
  • the water pump 16 is located in a borehole or well 26 and is drivingly connected to the drive assembly 22 by means of connecting rods 28.
  • the installation 10 also includes a water pipe 32 leading from an outlet of the water pump 16 to the surface of the of the borehole or well 26.
  • the installation 10 further includes a reservoir or water tank 30 having an inlet which is in fluid flow communication with the outlet of the water pump 16 via the water pipe 32 and a further water pipe 34, the water pipes 32, 34 being connected together by means of a T-piece coupling 36.
  • water from the borehole or well 26 is pumped by the water pump 16 from the borehole or well 26 into the reservoir or tank 30, which reservoir 30 is provided with a tap or other outlet valve (not shown) by means of which water can be tapped from the reservoir or tank 30.
  • the roundabout 12 is located relative to the borehole or well 26 such that the rotational axis of the roundabout is substantially coaxial with a longitudinal axis of the borehole or well 26.
  • the support formation 14 includes a hollow anchor 37, which has a rectangular cross-sectional profile.
  • the anchor 37 is set in concrete 40 and is, at ground level, provided with four radially outwardly projecting anchor plates 42 through which anchor bolts 44 are received.
  • the anchor bolts 44 are anchored in the concrete 40.
  • the support formation 14 further includes a hollow casing 38, which also has a rectangular cross-sectional profile.
  • the casing 38 is provided with a flange (not referenced) dividing the casing 38 in to a lower part, which is, in spigot-socket fashion, received in the anchor 37, and an upper part projecting vertically upwardly from the ground.
  • the casing 38 is secured to the anchor 37 by means of bolts (not shown) connecting the flange and the anchor plates 42 together. Adjacent an upper end of the casing 38, it is provided with an external peripheral shoulder 38 on which is seated a thrust bearing 48, more particularly a tapered roller bearing.
  • a further thrust bearing 50 also in the form of a tapered roller bearing, is externally located adjacent the aforesaid flange, i.e. adjacent the lower end of the upper part of the casing 38.
  • the purpose of the bearings 48, 50 will become more apparent hereunder.
  • the roundabout 12 includes a platform 52, a hollow central hub 54 having a circular cross-sectional internal profile, a plurality of drive arms 56 secured to and radiating outwardly from the hub 56, being secured to the platform 52, and a plurality of strengthening bars 58 connected to and extending between an upper end of the hub 54 and the platform 52.
  • the platform 52 is, for the sake of simplicity, shown as being of circular outline. It is to be appreciated that in other embodiments (not shown), the platform can be hexagonal or octagonal, or any other desired more or less circular shape.
  • An annular cover plate 60 is fast with a top end of the hub 54, the plate 60 providing a shoulder, the purpose of which will become more apparent hereunder.
  • the roundabout 12 is received over the upper part of the casing 38, the upper part of the casing 38 being located, with clearance, in the hub 54 of the roundabout 12, with the aforementioned shoulder resting on and engaging the thrust bearing 48.
  • a lower end of the hub 54 is shaped to rest on and engage the thrust bearing 50.
  • the thrust bearings 48, 50 locate and rotatingly support the hub 54 and, accordingly, the roundabout 12 for rotation about its rotational axis, i.e. about a longitudinal axis of the casing 38.
  • the roundabout 12 is provided with a rotation transfer plate 62 which is secured to the hub 54 by means of four drive bolts 64.
  • the rotation transfer plate 62 which is annularly shaped, rotates with the hub 54 upon rotation of the roundabout 12 by one or more humans.
  • the rotation transfer plate 62, the four drive bolts 64 and a coupling (described hereunder) provides a rotation input of the drive assembly 22.
  • the installation 10 further includes a drive shaft 66, which is in the form of a circular cylindrical tube, rotatingly dhvingly connected to the rotation transfer plate 62 and extending downwardly therefrom into the casing 38.
  • the rotation transfer plate 62 is provided with an opening (not visible) passing an upper end of the drive shaft 66.
  • the rotation transfer plate 62 is provided with a internal coupling formation (also not visible) which defines the aforementioned opening, the drive shaft 66 being provided with an external coupling formation (also not visible) complementary to and drivingly coupling the drive shaft 68 to coupling formation of the plate 62 and, accordingly, to the plate 62.
  • the complementary coupling formations may together form a star- or spline-type drive coupling.
  • An elongated hollow anchor 68 having a rectangular cross-sectional profile is located in an upper end of the casing 38.
  • the anchor 68 is shaped and sized that it is received with a sliding clearance in the upper end of the casing 38.
  • the anchor 68, at an upper end thereof, is flared, so as to define a downwardly directed shoulder and an upwardly directed shoulder. So as not to clutter-up the drawings, the downwardly directed and the upwardly directed shoulders are not individually referenced.
  • the downwardly directed shoulder of the anchor 68 rests on an upper end of the casing 38, and the upwardly directed shoulder of the anchor 68 defines an annular seat in which is seated a bearing 70 interacting with the drive shaft 66.
  • the bearing 70 thus provides for rotation of the drive shaft 66 relative to the anchor 68 upon rotation of the roundabout 12.
  • the drive shaft 66 is connected to an input of the planetary gearbox 24.
  • the planetary gearbox 24 is, as can be seen in Figure 6, provided with a base or flange 72, which flange 72 has a rectangular outline closely corresponding to the rectangular interior profile of the casing 38. The base or flange 72 thus ensures that the housing or casing of the gearbox 24 remains stationery, i.e. it does not rotate, upon rotation of the roundabout 12.
  • An output shaft 74 of the gearbox 24 extends downwardly into the casing 38 and through the generator 18 where it is connected to a one-directional rotation transfer mechanism in the form of a slip clutch or one-directional bearing 76.
  • a casing (not individually shown) of the slip clutch or one- directional bearing 76 is also anchored in the casing 38.
  • the generator 18 is configured such that it includes an internally located one-directional rotation transfer mechanism.
  • the one-directional rotation transfer mechanism of the generator 18 and the slip clutch or bearing 76 are opposingly oriented.
  • the slip clutch or one-directional bearing 76 transfers rotary motion, downwardly into the casing 38, only upon rotation of the roundabout in a counterclockwise direction, and the internal one-directional rotation transfers mechanism of the generator 18 transfers rotary motion in response to rotation of the roundabout in a clockwise direction only.
  • the output of the slip clutch or bearing 76 is connected, by means of a tubular output shaft 78, to an input shaft 80 of a water discharge head 82 located above the aforementioned T-piece coupling 36. Connection of the tubular output shaft 78 to the input shaft 80 is effected by means of a shaft coupling 81 (shown in concept only).
  • the aforementioned connecting rods 28 are drivingly connected to the water discharge head 82.
  • the gearbox 24 may, in addition to its output shaft 74, be provided with another output shaft which projects, co-axially with the output shaft 74, upwardly through the cylindrical or tubular drive shaft 66.
  • the further output shaft of the gearbox 16 can be provided with a drive formation for connection to a rotationally driven device such as a washing tub, a grinder, or the like. Mounting of such a rotationally driven device on the installation 10 will become more apparent hereunder with reference to Figures 7 and 8 of the drawings.
  • the generator 18, the gearbox 24, and most of the other components associated with generating electricity or pumping water are located in the casing 38, so that a cover covering the rotation transfer plate 62 and the upper end of the drive shaft 66 can be secured, typically welded, to the hub 54, thereby resisting undesired theft of or vandalism to the components of the installation 10 covered by such cover or located in the casing 38.
  • FIG. 90 a further embodiment of an installation in accordance with the invention is generally designated by reference numeral 90.
  • the installation 90 in certain respects, resembles the installation 10 and accordingly unless otherwise indicated, reference numerals used to indicate parts or features of the installation 10 are also used to indicate like parts or features of the installation 90.
  • the generator 18 and the gearbox 24 are located outside, more particularly above, on top of the hub 54.
  • the anchor 68 at an upper end thereof, is provided with an annular table or tray 92 which, by virtue of its connection to the anchor 68, remains stationary during rotation of the roundabout 12.
  • the generator 18 is fixedly, i.e. non-rotatably, mounted on the table or tray 92.
  • a drive cover 94 is fixedly mounted on the hub 54, more particularly on the annular plate 60, so that the drive cover 94 rotates with the roundabout 12.
  • the gearbox 24 is provided with an input shaft 96 which is, in a fashion similar as hereinbefore described with reference to the rotation transfer plate 62 and the drive shaft 66, drivingly connected to the drive cover 94.
  • the output shaft 74 of the gearbox 24 extends through the generator 18 into and down the casing 38 where it is drivingly connected to the water discharge head 82 (not shown in this figure).
  • the generator 18 of the installation 90 will be provided with an internal one-directional rotation transfer mechanism, and another oppositely oriented one-directional rotation transfer mechanism (not shown) will be located between the generator 18 and the water discharge head 82.
  • electricity is thus generated upon rotation of the roundabout 12 in a clockwise direction, and water is pumped from the borehole or well 26 upon rotation of the roundabout in a counterclockwise direction.
  • FIG 8 shows in part, yet a further embodiment of an installation in accordance with the invention, the installation shown in this figure being generally designated by reference numeral 100.
  • the installation 100 in certain respects, resembles the installation 10 and, accordingly unless otherwise indicated, reference numerals used to indicate parts or features of the installation 10 are also used to indicate like parts or features of the installation 100.
  • the installation 100 also includes the anchor 68.
  • a table or tray 102 similar to but bigger than the table or tray 92 of the installation 90, is secured to an upper end of the anchor 68.
  • the table or tray 102 is provided with an opening 104 which passes the drive shaft 66 with rotating clearance.
  • a toothed or sprocketed drive wheel 106 is fixedly, i.e. non-rotatably, secured to the hub 54, more particularly to the annular plate 60.
  • the drive wheel 106 is of annular or rim-like construction, such that it passes the anchor 68 with clearance.
  • a toothed or sprocketed driven wheel 108 is laterally spaced from the drive wheel 106 and secured, below the table or tray 102, to a transfer shaft 110 which is laterally spaced from the drive shaft 66.
  • the transfer shaft 110 is rotatably secured to and passes upwardly through the tray or table 102.
  • a flexible element typically in the form of a chain or toothed belt (not shown), drivingly connects the drive wheel 106 to the driven wheel 108.
  • a further toothed or sprocketed wheel 112 is located above the table or tray 102, being connected to the transfer shaft 110. In use, upon rotation of the roundabout 12 and, accordingly, the drive wheel 106, the driven wheel 112 is thus rotated.
  • the transfer shaft 110 is rotatably supported on the table or tray 102 by means of two bearings 114, 116.
  • a further toothed or sprocketed wheel 118 is mounted, above the table or tray 102, on the drive shaft 66.
  • a toothed belt or chain drivingly connects the wheels 112 and 118.
  • the sizes of the wheels 106, 108, 112, 118 are selected such that an increase in rotational speed takes place between the wheels 106, 108 and a further increase takes place between the wheels 112, 118.
  • a low speed input, provided upon rotation of the roundabout 12 is thus increased to a high speed output by means of the aforedescribed wheel and flexible elements system.
  • the drive shaft 66 At an upper end of the drive shaft 66, it is provided with a further rotational power take-off 120 (shown in concept only), to which can be connected a rotationally driven device such as a washing tub, a grinder, or the like.
  • a rotationally driven device such as a washing tub, a grinder, or the like.
  • Such further rotationally driven device is mounted on the table or tray 102.
  • the assembly 100 also includes a gearbox 24, a water pump 16, and a generator 18 which could either be located, in similar fashion as hereinbefore described with reference to the installation 10, in the casing 38, or, instead, can be drivingly connected to the power take-off 120.
  • the roundabout 12 is driven by at least one human.
  • a mounting formation will be constructed such that when a bicycle is mounted on the roundabout 12 by means of its fork, the rear wheel of the bicycle will engage the ground surrounding the platform 52. To drive the roundabout, a person will thus pedal the bicycle in conventional fashion.
  • any one of the installations 10, 90, 100 can include an activatable disengaging mechanism, for example a switch or the like, for disengaging, when activated, transfer of rotational motion from the roundabout 12 to at least the generator 18, and where applicable to the further rotational power take-off 120.
  • the installation 10, 90, 100 provides for rotation of the roundabout in one direction without a load being coupled thereto.
  • the mechanism can be activated such that rotation of the roundabout 12 in at least one direction is free rotation, i.e. no load, e.g. the generator 18 and a rotationally driven device connected to the further rotational power take-off 120, is being driven thereby.
  • the playground roundabout 12 can thus, in most cases subject to the direction of rotation thereof, be used, in conventional fashion, as a plaything for a child.
  • the invention as described and illustrated thus provides a playground installation which, in addition to serving as a roundabout, can also pump water, generate electricity and, if desired, even drive a further rotationally driven device. Accordingly, it is an advantage of the invention that it can employ, in a playful fashion, muscle power to pump water and generate electricity in rural areas where potable water and electricity is not readily available.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Power Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Reciprocating Pumps (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

A muscle-powered water pump installation which includes a drive formation (12) supported for rotation about a drive formation rotational axis by at least one animal or human, a water pump (16) drivingly connected to the drive formation for pumping water from a water supply in response to rotation of the drive formation, and an auxiliary rotary power take-off drivingly connected to the drive formation for providing rotational power in response to rotation of the drive formation.

Description

MUSCLE-POWERED WATER PUMP
THIS INVENTION relates to a muscle-powered water pump installation. The invention relates also to a playground roundabout installation.
BACKGROUND OF THE INVENTION
The invention is expected to be particularly advantageously applicable in rural areas where running potable water and electricity is not freely available.
SUMMARY OF THE INVENTION
According to one aspect of the invention, there is provided a muscle-powered water pump installation which includes: a drive formation supported for rotation about a drive formation rotational axis by at least one animal or human; a water pump drivingly connected to the drive formation for pumping water from a water supply in response to rotation of the drive formation; and an auxiliary rotary power take-off drivingly connected to the drive formation for providing rotational power in response to rotation of the drive formation.
The muscle-powered water pump installation may include a support formation anchored to the ground, the drive formation being rotatably supported by the support formation.
Any one of the water pump and the auxiliary power take-off may be drivingly connected to a drive formation drive shaft by means of a drive assembly. The drive assembly may include a gearbox for converting a low speed high torque input provided by the drive formation to a high speed low torque output.
At least one of the water pump and the power take-off may be driven at high speed and low torque in response to rotation of the drive formation.
The drive assembly may be configured for driving the water pump in response to rotation of the drive formation in one direction, and for driving the auxiliary power take-off in response to rotation of the drive formation in the other direction.
The drive assembly may include a rotational input dhvingly connected to the drive formation and to the gearbox, the gearbox having at least one output shaft.
The drive assembly may include two one-directional rotation transfer mechanisms, each of the one-directional rotation transfer mechanisms respectively associated with the water pump and the auxiliary power take-off, the one-directional rotation transfer mechanisms being arranged in opposing configurations, i.e. one of them will transfer rotational motion in response to rotation of the drive formation in a clockwise direction, the other transferring rotational motion in response to rotation of the drive formation in a counterclockwise direction.
The muscle-powered water pump installation may include an activatable disengaging mechanism, for example a switch or the like, typically associated with the auxiliary power take-off, for disengaging, when activated, transfer of rotational motion from the drive formation to the auxiliary power take-off. Thus, the installation provides for rotation of the drive formation in one direction without a load, i.e. the water pump or the auxiliary power take-off, being coupled thereto.
At least one one-directional rotation transfer mechanism may be in the form of a slip clutch or a one-directional bearing.
The support formation may include an elongated casing anchored to the ground, the casing defining an interior which has a non-circular cross-sectional profile. The drive assembly may be at least partially located in the casing, that part of the drive assembly located in the casing having a non-circular cross-sectional profile corresponding to that of the interior of the casing, thereby to resist rotation of the drive assembly relative to the casing.
The gearbox, which may be in the form of a planetary gearbox, may have a non-circular cross-sectional profile. In some embodiments, at least part of the drive assembly may be located in a drive assembly housing.
The gearbox may include only one output shaft, both the water pump and the auxiliary power output being connected to the output shaft via their associated one- directional rotation transfer mechanisms.
The gearbox may include two, typically co-axial, output shafts, the water pump and the auxiliary power take-off being drivingly connected, via their one- directional rotation transfer mechanisms to the respective output shafts.
The muscle-powered water pump installation may include at least one rotationally driven device drivingly connected to the auxiliary power take-off.
In one embodiment the rotationally driven device may be in the form of a generator for generating electricity in response to rotation of the drive formation in one direction.
In another embodiment the muscle-powered water pump installation may include an electric storage arrangement.
The electric storage arrangement may include a battery charger connected to the electric generator for charging at least one electrochemical battery upon generation of electricity by the generator. In use, an electrical device can be connected to the cell or battery, the cell or battery thus supplying electrical power to a said device. The drive assembly may be provided with a further rotational power take-off which, in response to rotation of the drive formation in one direction, typically the same direction which causes the auxiliary power take-off to be driven.
A rotationally driven device, e.g. a washing tub assembly, a grinding assembly, or the like may be connected to the further power take-off.
The rotationally driven device may be connected to the auxiliary power takeoff via a drive arrangement, e.g. sprocket wheels and a chain, or pulleys and a V-belt, which drive arrangement, in use, increases rotational speed provided by the drive formation to the rotational input of the drive assembly.
The muscle-powered water pump installation may include a water reservoir in fluid communication with an outlet of the water pump for receiving and storing water pumped from the water supply by the water pump. Typically, the water supply will be a borehole or a well.
The drive formation may be installed relative to a water supply such that the drive formation rotation axis is substantially co-axial with a longitudinal axis of the water supply.
The water pump may be in the form of a positive displacement pump.
The drive formation may be in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
The upright rotational axis may be substantially co-axial with a longitudinal axis of the water supply.
In this embodiment, the installation thus employs human muscle power.
Rotation of the roundabout in one direction will thus cause water to be pumped from an associated borehole or well, and rotation thereof in the opposite direction will thus cause energy to be generated and, if applicable, a rotationally driven device connected to the further power take-off to be driven. When the installation includes the abovedescribed disengagement mechanism, the mechanism can be activated such that rotation of the roundabout in one direction is free rotation, i.e. no load, e.g. the generator and the rotationally driven device, is being driven thereby. With the disengagement mechanism being activated, the playground roundabout can thus, subject to the direction of rotation thereof, be used, in conventional fashion, as a plaything for a child.
According to another aspect of the invention, there is provided a muscle- powered water pump installation which includes: a drive formation supported for rotation about a drive formation rotational axis by at least one animal or human; a generator dhvingly connected to the drive formation for generating electricity in response to rotation of the drive formation; and an electrical water pump powered by electricity generated by the generator for pumping water from a water supply.
The muscle-powered water pump installation may include a support formation anchored to the ground, the drive formation being rotatably supported by the support formation.
In one embodiment, the water pump may be directly electrically connected to the generator, so that the water pump pumps water in response to rotation of the drive formation.
In another embodiment the muscle-powered water pump installation may include an electric power storage arrangement for storing electricity in response to rotation of the drive formation.
The electric power storage arrangement may comprise a battery charger electrically connected to the generator, and an electrochemical battery charged in use by the battery charger, the water pump being electrically connected to the battery, so that the water pump is powered by electricity stored in the battery.
The muscle-powered water pump installation may include a gearbox for converting a low speed high torque input provided by the drive formation to a high speed low torque output. The generator may thus be driven at high speed and low torque in response to rotation of the drive formation.
The muscle-powered water pump installation may include a water reservoir in communication with an outlet of the water pump for receiving water pumped by the water pump.
The muscle-powered water pump installation may include an auxiliary power take-off. In this case, a rotationally driven device may drivingly be connected to the auxiliary power take-off.
The electrical water pump may be a submersible pump or a positive displacement pump located the water supply, such as a borehole or a well.
The drive formation may be in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
The drive formation may be in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
According to another aspect of the invention, there is provided a playground roundabout installation which includes: a rotatably supported roundabout; a water pump for pumping water from a water supply; and a rotational power take-off drivingly connected to the roundabout for providing rotational power to drive a rotationally driven device in response to rotation of the roundabout.
According to yet another aspect of the invention, there is provided a playground roundabout installation which includes a rotatably supported roundabout; a generator drivingly connected to the drive formation for generating electricity in response to rotation of the drive formation; and an electrical water pump powered by electricity generated by the generator for pumping water from a water supply.
The invention will now be described, by way of example only, with reference to the follow diagrammatic drawings.
DRAWING(S)
In the drawing(s): Figure 1 shows, schematically, a side elevation of a muscle-powered water pump installation in accordance with the invention;
Figure 2 shows, schematically and in part, a top plan elevation of a support formation forming part of the water pump installation shown in Figure 1 ;
Figure 3 shows, schematically, a side elevation of the support formation shown in Figure 2;
Figure 4 shows, schematically, a top plan elevation of a playground roundabout forming part of the water pump installation shown in Figure 1 ;
Figure 5 shows, schematically and on an enlarged scale, a side elevation of an upper part the playground roundabout shown in Figure 4; Figure 6 shows, schematically and on an enlarged scale, a partly axially-sectioned side elevation of part of the playground roundabout shown in Figures 4 and 5, the roundabout including one configuration of a drive assembly;
Figure 7 shows, on a slightly enlarged scale, a view corresponding to that shown in Figure 6, but the roundabout including a different configuration of the drive assembly; and
Figure 8 shows, on an enlarged scale, a view corresponding to that shown in Figure 7, but the roundabout including a yet further configuration of a drive assembly.
EMBODIMENT OF THE INVENTION
With reference to Figure 1 of the drawings, a muscle-powered water pump installation in accordance with the invention is generally designated by reference numeral 10. As will become more apparent hereunder, the installation 10 employs muscle power, in this example provided by at least one human, to pump water from a borehole or well, to generate electricity and, optionally, to drive a further rotationally driven device. The invention as described and illustrated is thus perfectly suited to be used in rural areas where running potable water and electricity is not readily available.
The installation 10 includes a drive formation in the form of a playground roundabout 12 rotatably supported above ground by a support formation 14 (see in particular Figures 2 and 3) for rotation about an operatively upright, typically vertical, axis. A water pump 16, which is in the form of a positive displacement pump (shown in concept only), is dhvingly connected to the roundabout 12, such that rotation of the roundabout 12 about its rotational axis causes operation of the water pump 16. Further, a generator 18 (also shown in concept only) is drivingly connected to the roundabout 12, such that rotation of the roundabout 12 about its rotational axis causes electricity to be generated by means of the generator 18. The installation 10 thus includes an auxiliary power take-off to which the generator 18 is drivingly connected. In certain embodiments (Figure 8), the installation 10 also includes a further rotational power takeoff drivingly connected to the roundabout 12, such that it too is driven in response to rotation of the roundabout 12. As will be described in more detail hereunder, a rotationally driven device such as, for example, a washing tub assembly, a grinding assembly, or the like, is in use driven by the power take-off.
Briefly, the water pump 16, the generator 18 and, where applicable, the further power take-off are all drivingly connected to the roundabout 12 by means of a drive assembly generally designated by reference numeral 22. The drive assembly 22 includes a planetary gearbox 24 for converting a low speed high torque input provided by the roundabout 12 to a low torque high speed output provided to the water pump 16 and, in some instances when desired, to the generator 18 and, where applicable, a rotationally driven device connected to the power take-off 20.
As mentioned above, the water pump 16 is used to pump water from a borehole or well. Thus, as can be seen in Figure 1 , the water pump 16 is located in a borehole or well 26 and is drivingly connected to the drive assembly 22 by means of connecting rods 28. As is conventional with borehole or well water pump installations, the installation 10 also includes a water pipe 32 leading from an outlet of the water pump 16 to the surface of the of the borehole or well 26. The installation 10 further includes a reservoir or water tank 30 having an inlet which is in fluid flow communication with the outlet of the water pump 16 via the water pipe 32 and a further water pipe 34, the water pipes 32, 34 being connected together by means of a T-piece coupling 36. In use, water from the borehole or well 26 is pumped by the water pump 16 from the borehole or well 26 into the reservoir or tank 30, which reservoir 30 is provided with a tap or other outlet valve (not shown) by means of which water can be tapped from the reservoir or tank 30.
As can be seen in Figure 1 , the roundabout 12 is located relative to the borehole or well 26 such that the rotational axis of the roundabout is substantially coaxial with a longitudinal axis of the borehole or well 26.
Referring now in particular to Figures 2 and 3 of the drawings, the support formation 14 includes a hollow anchor 37, which has a rectangular cross-sectional profile. The anchor 37 is set in concrete 40 and is, at ground level, provided with four radially outwardly projecting anchor plates 42 through which anchor bolts 44 are received. The anchor bolts 44 are anchored in the concrete 40. The support formation 14 further includes a hollow casing 38, which also has a rectangular cross-sectional profile. The casing 38 is provided with a flange (not referenced) dividing the casing 38 in to a lower part, which is, in spigot-socket fashion, received in the anchor 37, and an upper part projecting vertically upwardly from the ground. The casing 38 is secured to the anchor 37 by means of bolts (not shown) connecting the flange and the anchor plates 42 together. Adjacent an upper end of the casing 38, it is provided with an external peripheral shoulder 38 on which is seated a thrust bearing 48, more particularly a tapered roller bearing. A further thrust bearing 50, also in the form of a tapered roller bearing, is externally located adjacent the aforesaid flange, i.e. adjacent the lower end of the upper part of the casing 38. The purpose of the bearings 48, 50 will become more apparent hereunder.
Referring now to the roundabout 12, it includes a platform 52, a hollow central hub 54 having a circular cross-sectional internal profile, a plurality of drive arms 56 secured to and radiating outwardly from the hub 56, being secured to the platform 52, and a plurality of strengthening bars 58 connected to and extending between an upper end of the hub 54 and the platform 52. In the example shown, the platform 52 is, for the sake of simplicity, shown as being of circular outline. It is to be appreciated that in other embodiments (not shown), the platform can be hexagonal or octagonal, or any other desired more or less circular shape.
An annular cover plate 60 is fast with a top end of the hub 54, the plate 60 providing a shoulder, the purpose of which will become more apparent hereunder. As can be seen, the roundabout 12 is received over the upper part of the casing 38, the upper part of the casing 38 being located, with clearance, in the hub 54 of the roundabout 12, with the aforementioned shoulder resting on and engaging the thrust bearing 48. A lower end of the hub 54 is shaped to rest on and engage the thrust bearing 50. Thus, the thrust bearings 48, 50 locate and rotatingly support the hub 54 and, accordingly, the roundabout 12 for rotation about its rotational axis, i.e. about a longitudinal axis of the casing 38.
At an upper end of the hub 54, the roundabout 12 is provided with a rotation transfer plate 62 which is secured to the hub 54 by means of four drive bolts 64. Thus, the rotation transfer plate 62, which is annularly shaped, rotates with the hub 54 upon rotation of the roundabout 12 by one or more humans. The rotation transfer plate 62, the four drive bolts 64 and a coupling (described hereunder) provides a rotation input of the drive assembly 22.
The installation 10 further includes a drive shaft 66, which is in the form of a circular cylindrical tube, rotatingly dhvingly connected to the rotation transfer plate 62 and extending downwardly therefrom into the casing 38. In particular, the rotation transfer plate 62 is provided with an opening (not visible) passing an upper end of the drive shaft 66. The rotation transfer plate 62 is provided with a internal coupling formation (also not visible) which defines the aforementioned opening, the drive shaft 66 being provided with an external coupling formation (also not visible) complementary to and drivingly coupling the drive shaft 68 to coupling formation of the plate 62 and, accordingly, to the plate 62. In particular examples, the complementary coupling formations may together form a star- or spline-type drive coupling.
An elongated hollow anchor 68 having a rectangular cross-sectional profile is located in an upper end of the casing 38. The anchor 68 is shaped and sized that it is received with a sliding clearance in the upper end of the casing 38. The anchor 68, at an upper end thereof, is flared, so as to define a downwardly directed shoulder and an upwardly directed shoulder. So as not to clutter-up the drawings, the downwardly directed and the upwardly directed shoulders are not individually referenced. As can be seen in particular in Figure 6, the downwardly directed shoulder of the anchor 68 rests on an upper end of the casing 38, and the upwardly directed shoulder of the anchor 68 defines an annular seat in which is seated a bearing 70 interacting with the drive shaft 66. By virtue of the rectangular cross-sectional profile of the anchor 68, it, like the casing 38, remains stationary during rotation of the roundabout 12. The bearing 70 thus provides for rotation of the drive shaft 66 relative to the anchor 68 upon rotation of the roundabout 12. At its lower end, the drive shaft 66 is connected to an input of the planetary gearbox 24. The planetary gearbox 24 is, as can be seen in Figure 6, provided with a base or flange 72, which flange 72 has a rectangular outline closely corresponding to the rectangular interior profile of the casing 38. The base or flange 72 thus ensures that the housing or casing of the gearbox 24 remains stationery, i.e. it does not rotate, upon rotation of the roundabout 12. An output shaft 74 of the gearbox 24 extends downwardly into the casing 38 and through the generator 18 where it is connected to a one-directional rotation transfer mechanism in the form of a slip clutch or one-directional bearing 76. A casing (not individually shown) of the slip clutch or one- directional bearing 76 is also anchored in the casing 38. Although not shown as such, the generator 18 is configured such that it includes an internally located one-directional rotation transfer mechanism. The one-directional rotation transfer mechanism of the generator 18 and the slip clutch or bearing 76 are opposingly oriented. In particular, they are oriented such that the slip clutch or one-directional bearing 76 transfers rotary motion, downwardly into the casing 38, only upon rotation of the roundabout in a counterclockwise direction, and the internal one-directional rotation transfers mechanism of the generator 18 transfers rotary motion in response to rotation of the roundabout in a clockwise direction only. The output of the slip clutch or bearing 76 is connected, by means of a tubular output shaft 78, to an input shaft 80 of a water discharge head 82 located above the aforementioned T-piece coupling 36. Connection of the tubular output shaft 78 to the input shaft 80 is effected by means of a shaft coupling 81 (shown in concept only). The aforementioned connecting rods 28 are drivingly connected to the water discharge head 82. Thus, upon rotation of the roundabout 12 in a clockwise direction, electricity is generated by the generator 18, and in response to rotation of the roundabout 12 in a counterclockwise direction, the water pump 16 is driven, so that water is pumped from the borehole or well 26 into the reservoir or tank 30.
In other embodiments (not shown), the gearbox 24 may, in addition to its output shaft 74, be provided with another output shaft which projects, co-axially with the output shaft 74, upwardly through the cylindrical or tubular drive shaft 66. At a free end thereof, the further output shaft of the gearbox 16 can be provided with a drive formation for connection to a rotationally driven device such as a washing tub, a grinder, or the like. Mounting of such a rotationally driven device on the installation 10 will become more apparent hereunder with reference to Figures 7 and 8 of the drawings.
With the installation shown in Figure 6, the generator 18, the gearbox 24, and most of the other components associated with generating electricity or pumping water are located in the casing 38, so that a cover covering the rotation transfer plate 62 and the upper end of the drive shaft 66 can be secured, typically welded, to the hub 54, thereby resisting undesired theft of or vandalism to the components of the installation 10 covered by such cover or located in the casing 38.
Referring now to Figure 7 of the drawings, a further embodiment of an installation in accordance with the invention is generally designated by reference numeral 90. The installation 90, in certain respects, resembles the installation 10 and accordingly unless otherwise indicated, reference numerals used to indicate parts or features of the installation 10 are also used to indicate like parts or features of the installation 90.
In this embodiment, as opposed to the embodiment described hereinbefore, the generator 18 and the gearbox 24 are located outside, more particularly above, on top of the hub 54. In this embodiment, the anchor 68, at an upper end thereof, is provided with an annular table or tray 92 which, by virtue of its connection to the anchor 68, remains stationary during rotation of the roundabout 12. The generator 18 is fixedly, i.e. non-rotatably, mounted on the table or tray 92. The gearbox 24, in turn, is mounted on and above the generator 18. A drive cover 94 is fixedly mounted on the hub 54, more particularly on the annular plate 60, so that the drive cover 94 rotates with the roundabout 12. The gearbox 24 is provided with an input shaft 96 which is, in a fashion similar as hereinbefore described with reference to the rotation transfer plate 62 and the drive shaft 66, drivingly connected to the drive cover 94. Thus, upon rotation of the roundabout 12, the input shaft 96 of the gearbox 24 is rotated. The output shaft 74 of the gearbox 24 extends through the generator 18 into and down the casing 38 where it is drivingly connected to the water discharge head 82 (not shown in this figure).
Typically, the generator 18 of the installation 90, as is the case with the generator 18 of the installation 10, will be provided with an internal one-directional rotation transfer mechanism, and another oppositely oriented one-directional rotation transfer mechanism (not shown) will be located between the generator 18 and the water discharge head 82. In use, electricity is thus generated upon rotation of the roundabout 12 in a clockwise direction, and water is pumped from the borehole or well 26 upon rotation of the roundabout in a counterclockwise direction.
Figure 8 shows in part, yet a further embodiment of an installation in accordance with the invention, the installation shown in this figure being generally designated by reference numeral 100. The installation 100, in certain respects, resembles the installation 10 and, accordingly unless otherwise indicated, reference numerals used to indicate parts or features of the installation 10 are also used to indicate like parts or features of the installation 100.
The installation 100 also includes the anchor 68. A table or tray 102, similar to but bigger than the table or tray 92 of the installation 90, is secured to an upper end of the anchor 68. The table or tray 102 is provided with an opening 104 which passes the drive shaft 66 with rotating clearance. Below the table or tray 102, a toothed or sprocketed drive wheel 106 is fixedly, i.e. non-rotatably, secured to the hub 54, more particularly to the annular plate 60. The drive wheel 106 is of annular or rim-like construction, such that it passes the anchor 68 with clearance. A toothed or sprocketed driven wheel 108 is laterally spaced from the drive wheel 106 and secured, below the table or tray 102, to a transfer shaft 110 which is laterally spaced from the drive shaft 66. The transfer shaft 110 is rotatably secured to and passes upwardly through the tray or table 102. A flexible element, typically in the form of a chain or toothed belt (not shown), drivingly connects the drive wheel 106 to the driven wheel 108. A further toothed or sprocketed wheel 112 is located above the table or tray 102, being connected to the transfer shaft 110. In use, upon rotation of the roundabout 12 and, accordingly, the drive wheel 106, the driven wheel 112 is thus rotated. The transfer shaft 110 is rotatably supported on the table or tray 102 by means of two bearings 114, 116. A further toothed or sprocketed wheel 118 is mounted, above the table or tray 102, on the drive shaft 66. Although not shown as such, a toothed belt or chain drivingly connects the wheels 112 and 118. The sizes of the wheels 106, 108, 112, 118 are selected such that an increase in rotational speed takes place between the wheels 106, 108 and a further increase takes place between the wheels 112, 118. A low speed input, provided upon rotation of the roundabout 12, is thus increased to a high speed output by means of the aforedescribed wheel and flexible elements system.
At an upper end of the drive shaft 66, it is provided with a further rotational power take-off 120 (shown in concept only), to which can be connected a rotationally driven device such as a washing tub, a grinder, or the like. Such further rotationally driven device is mounted on the table or tray 102. Although not shown as such, the assembly 100 also includes a gearbox 24, a water pump 16, and a generator 18 which could either be located, in similar fashion as hereinbefore described with reference to the installation 10, in the casing 38, or, instead, can be drivingly connected to the power take-off 120.
As foreshadowed, in use, the roundabout 12 is driven by at least one human. This could either be done in conventional roundabout play-fashion, or the roundabout 12 can be provided with a mounting formation for mounting of a fork of a bicycle, of which the front wheel has been removed, on the platform 52 or on one of the drive arms 56. Such a mounting formation will be constructed such that when a bicycle is mounted on the roundabout 12 by means of its fork, the rear wheel of the bicycle will engage the ground surrounding the platform 52. To drive the roundabout, a person will thus pedal the bicycle in conventional fashion.
Although not shown as such in the drawings, any one of the installations 10, 90, 100 can include an activatable disengaging mechanism, for example a switch or the like, for disengaging, when activated, transfer of rotational motion from the roundabout 12 to at least the generator 18, and where applicable to the further rotational power take-off 120. Thus, in this embodiment, the installation 10, 90, 100 provides for rotation of the roundabout in one direction without a load being coupled thereto. When the installation 10, 90, 100 includes the abovedescribed disengagement mechanism, the mechanism can be activated such that rotation of the roundabout 12 in at least one direction is free rotation, i.e. no load, e.g. the generator 18 and a rotationally driven device connected to the further rotational power take-off 120, is being driven thereby. With the disengagement mechanism being activated, the playground roundabout 12 can thus, in most cases subject to the direction of rotation thereof, be used, in conventional fashion, as a plaything for a child.
It is to be appreciated that various other combinations and configurations, besides the illustrated and described versions, of the generator 18, the gearbox 24 and, when applicable, the power take-off 120, are possible.
The invention as described and illustrated thus provides a playground installation which, in addition to serving as a roundabout, can also pump water, generate electricity and, if desired, even drive a further rotationally driven device. Accordingly, it is an advantage of the invention that it can employ, in a playful fashion, muscle power to pump water and generate electricity in rural areas where potable water and electricity is not readily available.

Claims

CLAIMS:
1. A muscle-powered water pump installation which includes: a drive formation supported for rotation about a drive formation rotational axis by at least one animal or human; a water pump drivingly connected to the drive formation for pumping water from a water supply in response to rotation of the drive formation; and an auxiliary rotary power take-off drivingly connected to the drive formation for providing rotational power in response to rotation of the drive formation.
2. A muscle-powered water pump installation as claimed in claim 1 , which includes a support formation anchored to the ground, the drive formation being rotatably supported by the support formation.
3. A muscle-powered water pump installation as claimed in any one claims 1 and 2 in which any one of the water pump and the auxiliary power take-off is drivingly connected to a drive formation drive shaft by means of a drive assembly.
4. A muscle-powered water pump installation as claimed in claim 3, in which the drive assembly includes a gearbox for converting a low speed high torque input provided by the drive formation to a high speed low torque output.
5. A muscle-powered water pump installation as claimed in claim 4 in which at least one of the water pump and the power take-off is driven at high speed and low torque in response to rotation of the drive formation.
6. A muscle-powered water pump installation as claimed in any one of claims 3 to 5, in which the drive assembly is configured for driving the water pump in response to rotation of the drive formation in one direction, and for driving the auxiliary power take- off in response to rotation of the drive formation in the other direction.
7. A muscle-powered water pump installation as claimed in claim 6 in which the drive assembly includes a rotational input drivingly connected to the drive formation and to the gearbox, the gearbox having at least one output shaft.
8. A muscle-powered water pump installation as claimed in claim 6 in which the drive assembly includes two one-directional rotation transfer mechanisms, each of the one-directional rotation transfer mechanisms respectively associated with the water pump and the auxiliary power take-off, the one-directional rotation transfer mechanisms being arranged in opposing configurations.
9. A muscle-powered water pump installation as claimed in any one of claims 7 and 8, which includes an activatable disengaging mechanism, associated with the auxiliary power take-off, for disengaging, when activated, transfer of rotational motion from the drive formation to the auxiliary power take-off.
10. A muscle-powered water pump installation as claimed in claim 8 in which at least one one-directional rotation transfer mechanism is in the form of a slip clutch or a one-directional bearing.
11. A muscle-powered water pump installation as claimed in any one of claims 2 to 10, in which the support formation includes an elongated casing anchored to the ground, the casing defining an interior which has a non-circular cross-sectional profile.
12. A muscle-powered water pump installation as claimed in claim 11 , in which the drive assembly is at least partially located in the casing, that part of the drive assembly located in the casing having a non-circular cross-sectional profile corresponding to that of the interior of the casing, thereby to resist rotation of the drive assembly relative to the casing.
13. A muscle-powered water pump installation as claimed in claim 11 , in which the gearbox has a non-circular cross-sectional profile.
14. A muscle-powered water pump installation as claimed in any one of claims 4 to 13, in which the gearbox includes only one output shaft, both the water pump and the auxiliary power output being connected to the output shaft via their associated one- directional rotation transfer mechanisms.
15. A muscle-powered water pump installation as claimed in any one of claims 4 to 13, in which the gearbox includes two output shafts, the water pump and the auxiliary power take-off being dhvingly connected, via their one-directional rotation transfer mechanisms to the respective output shafts.
16. A muscle-powered water pump installation as claimed in any one of claims 1 to 15, which includes at least one rotationally driven device drivingly connected to the auxiliary power take-off.
17. A muscle-powered water pump installation as claimed in claim 16, in which the rotationally driven device is in the form of a generator for generating electricity in response to rotation of the drive formation in one direction.
18. A muscle-powered water pump installation as claimed in claim 17, which includes an electric storage arrangement.
19. A muscle-powered water pump installation as claimed in claim 18, in which the electric storage arrangement includes a battery charger connected to the electric generator for charging at least one electrochemical battery upon generation of electricity by the generator.
20. A muscle-powered water pump installation as claimed in any one of claims 3 to 19, in which the drive assembly is provided with a further rotational power take-off which, in response to rotation of the drive formation in one direction causes the auxiliary power take-off to be driven.
21. A muscle-powered water pump installation as claimed in claim 20 in which a rotationally driven device is connected to the further power take-off.
22. A muscle-powered water pump installation as claimed in claim 21 in which the rotationally driven device is connected to the auxiliary power take-off via a drive arrangement, which drive arrangement, in use, increases rotational speed provided by the drive formation to the rotational input of the drive assembly.
23. A muscle-powered water pump installation as claimed in any one of claims 1 to 22 which includes a water reservoir in fluid communication with an outlet of the water pump for receiving and storing water pumped from the water supply by the water pump.
24. A muscle-powered water pump installation as claimed in claim 23 in which the drive formation is installed relative to a water supply such that the drive formation rotation axis is substantially co-axial with a longitudinal axis of the water supply.
25. A muscle-powered water pump installation as claimed in any one of claims 1 to 23 in which the water pump is in the form of any one of a submersible pump and a positive displacement pump.
26. A muscle-powered water pump installation as claimed in any one of claims 1 to 25, in which the drive formation is in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
27. A muscle-powered water pump installation as claimed in claim 26 in which the upright rotational axis is substantially co-axial with a longitudinal axis of the water supply.
28. A muscle-powered water pump installation which includes: a drive formation supported for rotation about a drive formation rotational axis by at least one animal or human; a generator dhvingly connected to the drive formation for generating electricity in response to rotation of the drive formation; and an electrical water pump powered by electricity generated by the generator for pumping water from a water supply.
29. A muscle-powered water pump installation as claimed in claim 28, which includes a support formation anchored to the ground, the drive formation being rotatably supported by the support formation.
30. A muscle-powered water pump installation as claimed in any one of claims
28 and 29, in which the water pump is directly electrically connected to the generator, so that the water pump pumps water in response to rotation of the drive formation.
31. A muscle-powered water pump installation as claimed in any one of claims
28 to 29, which includes an electric power storage arrangement for storing electricity in response to rotation of the drive formation.
32. A muscle-powered water pump installation as claimed in claim 31 in which the electric power storage arrangement comprises a battery charger electrically connected to the generator, and an electrochemical battery charged in use by the battery charger, the water pump being electrically connected to the battery, so that the water pump is powered by electricity stored in the battery.
33. A muscle-powered water pump installation as claimed in any one of claims
28 to 32 which includes a gearbox for converting a low speed high torque input provided by the drive formation to a high speed low torque output.
34. A muscle-powered water pump installation as claimed in any one of claims 28 to 33 which includes a water reservoir in communication with an outlet of the water pump for receiving water pumped by the water pump.
35. A muscle-powered water pump installation as claimed in any one of claims 28 to 34 which includes an auxiliary power take-off.
36. A muscle-powered water pump installation as claimed in any one of claims 28 to 35, in which the electrical water pump is a positive displacement pump located the water supply.
37. A muscle-powered water pump installation as claimed in any one of claims
28 to 36, in which the drive formation is in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
38. A muscle-powered water pump installation as claimed in any one of claims
28 to 27, in which the drive formation is in the form of a playground roundabout supported by the support formation for rotation about an upright rotational axis.
39. A playground roundabout installation which includes: a rotatably supported roundabout; a water pump for pumping water from a water supply; and a rotational power take-off dhvingly connected to the roundabout for providing rotational power to drive a rotationally driven device in response to rotation of the roundabout.
40. A playground roundabout installation which includes a rotatably supported roundabout; a generator dhvingly connected to the drive formation for generating electricity in response to rotation of the drive formation; and an electrical water pump powered by electricity generated by the generator for pumping water from a water supply.
41. A muscle-powered water pump installation as claimed in claim 1 , substantially as herein described and illustrated.
42. A muscle-powered water pump installation as claimed in claim 28, substantially as herein described and illustrated.
43. A playground roundabout installation as claimed in claim 39, substantially as herein described and illustrated.
44. A playground roundabout installation as claimed in claim 40, substantially as herein described and illustrated.
45. A new muscle-powered water pump installation and a new playground roundabout, substantially as herein described.
PCT/IB2007/054630 2006-11-15 2007-11-14 Muscle-powered water pump WO2008059449A2 (en)

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ZA200609509 2006-11-15

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