EP0017973A2 - Counter-current swimming apparatus - Google Patents

Counter-current swimming apparatus Download PDF

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Publication number
EP0017973A2
EP0017973A2 EP80102038A EP80102038A EP0017973A2 EP 0017973 A2 EP0017973 A2 EP 0017973A2 EP 80102038 A EP80102038 A EP 80102038A EP 80102038 A EP80102038 A EP 80102038A EP 0017973 A2 EP0017973 A2 EP 0017973A2
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EP
European Patent Office
Prior art keywords
outlet nozzle
housing
swimming device
motor
countercurrent swimming
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Granted
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EP80102038A
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German (de)
French (fr)
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EP0017973A3 (en
EP0017973B1 (en
Inventor
Karsten Laing
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/12—Arrangements in swimming pools for teaching swimming or for training
    • A63B69/125—Devices for generating a current of water in swimming pools
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2210/00—Space saving
    • A63B2210/50—Size reducing arrangements for stowing or transport

Definitions

  • the invention relates to a jet generator for swimming pools.
  • Jet generators for swimming pools enable "on the spot swimming".
  • the known devices are equipped with a centrifugal pump, which generates a comparatively high pressure and allows suctioned-in swimming pool water to escape through one or more small openings.
  • These devices must either be installed in a pit outside the swimming pool, whereby it is necessary to perforate the sealing wall of the swimming pool, or they are placed on the edge of a swimming pool.
  • masonry work of considerable scope is required.
  • Devices with an underwater motor have also become known, but they also work with centrifugal pumps and have a correspondingly low throughput at a high exit speed.
  • the use of axial impellers has hitherto failed due to the very uneven speed distribution over the outlet area, which would have an effect in particular in the case of the nozzle according to the invention in that water would only escape at high speed on one side.
  • the axial rotor is arranged eccentrically to the vertical axis of the device.
  • the small dimensions of the axial pump and motor make it possible to make the device so light and space-saving that it can also be accommodated in small swimming pools. It is also possible to arrange the device so that it can be swiveled. This can produce very different effects.
  • the same device can be used for swimming, for generating waves, for massage, but also as a water feature. It is desirable that the thrust of the water jet is so great that the swimmer cannot swim up to the device even under extreme exertion. This has not been possible until now, since jets escaping at high speed can lead to physical injuries, which is not possible with high water throughput and low exit speed.
  • the inventive device is therefore preferably dimensioned to such a jet thrust g Rossen that the float can not swim up to the device. As a result, however, the previously usual underwater switches for manual operation can no longer be used.
  • the invention therefore also relates to a switch that does not require the push of a button.
  • the switch arranged outside the basin is actuated electromagnetically.
  • the switching pulse is supplied by a sound amplifier at sound frequencies between 15 kHz and 25 kHz. The swimmer claps his wet hands together to operate.
  • the device is box-shaped, the water entering at the lower end 2 of the housing 1.
  • a constriction element 3 is arranged in the interior of the housing, which is circular in cross section 4.
  • the motor 5 is concentric below this circular passage cross section arranged, which drives the axial impeller 6.
  • the axis of rotation 7 is offset laterally to the vertical axis in order to compensate for the impeller twist, the offset being selected such that the quantity distribution over the horizontal extent of the outlet nozzle 8 is approximately constant.
  • the outlet area of the outlet nozzle 8 is approximately as large as the passage area in the narrowest cross section 4 of the constriction element 3, so that delay losses are avoided.
  • the width should correspond to the body width of a swimmer.
  • Figure 2 shows the device in side view.
  • the motor 5 is held by a clamp 20 which is attached to the tubes 22 in a height-adjustable manner via clamping pieces 21.
  • the screws 23 serving for the clamps are accessible from the outside for height adjustment.
  • FIG. 3 shows the horizontal cross section through the housing 1 and the holding tubes 22 passed through and the motor 5.
  • the cable 30 is passed through one of the tubes 22 ′.
  • the H-age tubes 22 are guided along the inner edge of the back region 33 of the housing 1 drawn into the tube spacing, as a result of which the housing is held parallel to the tubes without further guide elements.
  • the bent area 21 ' should run directly above the pool edge 40 so that covering devices are not obstructed.
  • Figure 4 shows an alternative design of the tubes, in which a swivel joint is provided in the region of the nozzle, which allows the device to be pivoted almost to the horizontal position.
  • the jet emerges from the water surface in the height setting shown.
  • FIG. 5 shows an alternative arrangement in which - as shown in FIG. 5a - the emerging jet is directed in the horizontal direction by a nozzle element 50, while the jet in FIG. 5b emerges approximately vertically by repositioning this element in the position 50 '.
  • This control unit has a microphone and a microphone amplifier with a resonance circuit, the resonance frequencies of which are between 15 kHz and 25 kHz.
  • This control unit makes it possible to switch the device on and off without contact.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Toys (AREA)

Abstract

Gegenstromschwimmgerat, bestehend aus einem Unterwasser-Elektromotor, einer Pumpe, einem Gehause, einer Austrittsdüse und Befestigungsmitteln, wobei der Motor einen Axialpumpenläufer antreibt, der in einer Einschnürung des Gehäuses angeordnet ist und wobei der engste Querschnitt dieser Einschnürung mit dem Querschnitt der Austrittsdüse, die der Einschnürung nachgeschaltet ist, annähernd zusammenfällt, und wobei Motor, Pumpenlaufer. Einschnurungselement und Austrittsdüse von einem Gehäuse umgeben sind, dessen Breite mit der Breite der ?Austrittsdüse? annähernd zusammenfällt.Counter-current swimming device, consisting of an underwater electric motor, a pump, a housing, an outlet nozzle and fastening means, the motor driving an axial pump rotor which is arranged in a constriction of the housing and the narrowest cross section of this constriction with the cross section of the outlet nozzle which Constriction is downstream, almost coincides, and being motor, pump rotor. The necking element and the outlet nozzle are surrounded by a housing, the width of which corresponds to the width of the? Outlet nozzle? almost coincides.

Description

Die Erfindung bezieht sich auf einen Strahlerzeuger für Schwimmbäder.The invention relates to a jet generator for swimming pools.

Strahlerzeuger für Schwimmbäder ermöglichen das "Auf-der-Stelle-Schwimmen". Die bekannten Geräte sind mit einer Zentrifugalpumpe ausgerüstet, die einen vergleichsweise hohen Druck erzeugt und angesaugtes Schwimmbadwasser durch eine oder mehrere kleine öffnungen austreten lässt. Diese Geräte müssen entweder in einer Grube ausserhalb des Schwimmbades montiert werden, wobei es notwendig ist, die dichtende Wandung des Schwimmbades zu perforieren, oder aber sie werden auf den Rand eines Schwimmbades aufgestellt. Im ersten Fall sind Maurerarbeiten erheblichen Umfanges erforderlich. Im zweiten Fall ist der Einsatz bei unsteifen Plastikfolienbecken oder auch Becken mit dünnen Blechwandungen nicht möglich. Es sind des weiteren Geräte mit einem Unterwassermotor bekanntgeworden, die aber ebenfalls mit Zentrifugalpumpen arbeiten und eine entsprechend geringe Durchsatzmenge bei hoher Austrittsgeschwindigkeit aufweisen.Jet generators for swimming pools enable "on the spot swimming". The known devices are equipped with a centrifugal pump, which generates a comparatively high pressure and allows suctioned-in swimming pool water to escape through one or more small openings. These devices must either be installed in a pit outside the swimming pool, whereby it is necessary to perforate the sealing wall of the swimming pool, or they are placed on the edge of a swimming pool. In the first case, masonry work of considerable scope is required. In the second case, it is not possible to use it with non-rigid plastic foil pools or pools with thin sheet metal walls. Devices with an underwater motor have also become known, but they also work with centrifugal pumps and have a correspondingly low throughput at a high exit speed.

Aus der S-chubgleichung ergibt sich, dass sich die Pumpleistung bei konstantem Schub wie

Figure imgb0001

  • P = hydraulische Leistung der Pumpe
  • a = Austrittsfläche der Düse
verhält, d.h. je grösser die Austrittsfläche ist, umso kleiner ist die erforderliche Antriebsleistung. Die Erfindung bezieht sich auf Geräte, die in an sich bekannter Weise unterhalb des Schwimmbeckens Aufstellung finden, die also überflutbar ausgebildet sind und in Ausnutzung der obigen Beziehung durch den Einsatz von Axiallaufrädern auf hohe Austrittsgeschwindigkeiten verzichten, dafür aber grosse Austrittsflächen aufweisen. Es hat sich gezeigt, dass die gleichen hydraulischen Schübe, die bei den bisher üblichen Austrittsgeschwindigkeiten mit Antriebsleistungen von 4 - 5 kW erkauft werden mussten, bei Austrittsgeschwindigkeiten von ca. 2 m/sec mit nur 0,66 kW erreichbar sind, wenn die Austrittsdüse erfindungsgemäss eine grosse Erstreckung in horizontaler Richtung aufweist, so dass ein flacher, den Körper des Schwimmers voll erfassender Strahl entsteht. Dies ist für Schwimmbadantriebe von besonderer Bedeutung, da es dadurch möglich ist, die Motoren einphasig anzuschliessen, während Motoren mit z.B. 4 kW Abgabeleistung dreiphasigen Anschluss erfordern. Da bei Schwimmbadgeräten die Zwischenschaltung eines Schutzspannungs-Transformators oder eines Fehlerstromschalters gefordert wird, reduziert sich der zusätzliche elektrische Aufwand bei einphasigem Anschluss der erfindungsgemässen Geräte ausserordentlich.From the S-thrust equation it follows that the pump output with constant thrust is like
Figure imgb0001
  • P = hydraulic power of the pump
  • a = exit surface of the nozzle
behaves, ie the larger the exit surface, the smaller the drive power required. The invention relates to devices that are installed in a manner known per se below the swimming pool, that is to say they are designed to be floodable and, by using the above relationship by using axial impellers, dispense with high exit speeds, but have large exit areas. It has been shown that the same hydraulic thrusts, which had to be bought at the usual exit speeds with drive powers of 4-5 kW, can be reached at exit speeds of approx. 2 m / sec with only 0.66 kW if the outlet nozzle according to the invention has a large extension in the horizontal direction, so that a flat jet is formed which fully covers the body of the swimmer. This is of particular importance for swimming pool drives, since it makes it possible to connect the motors in one phase, while motors with, for example, 4 kW output power require a three-phase connection. Since the interposition of a protective voltage transformer or a fault current switch is required in swimming pool devices, the additional electrical outlay for the single-phase connection of the devices according to the invention is greatly reduced.

Der Einsatz von Axiallaufrädern scheiterte bisher an der sehr ungleichmässigen Geschwindigkeitsverteilung über den Austrittsbereich, was sich insbesondere bei der Düse nach der Erfindung dahin auswirken würde, dass nur auf einer Seite Wasser mit hoher Geschwindigkeit austreten würde. Zur Vermeidung dieses Nachteiles wird der Axialläufer exzentrisch zur Hochachse des Gerätes angeordnet.The use of axial impellers has hitherto failed due to the very uneven speed distribution over the outlet area, which would have an effect in particular in the case of the nozzle according to the invention in that water would only escape at high speed on one side. To avoid this disadvantage, the axial rotor is arranged eccentrically to the vertical axis of the device.

Durch die geringen Abmessungen von Axialpumpe und Motor ist es möglich, das Gerät so leicht und raumsparend auszubilden, dass die Unterbringung auch in kleinen Schwimmbädern möglich ist. Ausserdem ist es möglich, das Gerät schwnkbar anzuordnen. Dadurch können stark unterschiedliche Wirkungen erzeugt werden. Das gleiche Gerät kann zum Schwimmen, zur Wellenerzeugung, für Massage, aber auch als Wasserspiel eingesetzt werden. Es ist erwünscht, dass der Schub des Wasserstrahls so gross ist, dass der Schwimmer auch bei äusserster Anstrengung nicht bis an das Gerät heranschwimmen kann. Dies war bisher nicht möglich, da mit hoher Geschwindigkeit austretende Strahlen zu Körperverletzungen führen können, was bei grossem Wasserdurchsatz und kleiner Austrittsgeschwindigkeit nicht möglich ist. Das erfindungsgemässe Gerät wird deshalb bevorzugt auf einen derart grossen Strahlschub dimensioniert, dass der Schwimmer nicht bis an das Gerät heranschwimmen kann. Hierdurch sind aber die bisher üblichen Unterwasserschalter für Handbetrieb nicht mehr verwendbar.The small dimensions of the axial pump and motor make it possible to make the device so light and space-saving that it can also be accommodated in small swimming pools. It is also possible to arrange the device so that it can be swiveled. This can produce very different effects. The same device can be used for swimming, for generating waves, for massage, but also as a water feature. It is desirable that the thrust of the water jet is so great that the swimmer cannot swim up to the device even under extreme exertion. This has not been possible until now, since jets escaping at high speed can lead to physical injuries, which is not possible with high water throughput and low exit speed. The inventive device is therefore preferably dimensioned to such a jet thrust g Rossen that the float can not swim up to the device. As a result, however, the previously usual underwater switches for manual operation can no longer be used.

Die Erfindung bezieht sich deshalb auch auf einen Schalter, der keines Knopfdruckes bedarf. Gemäss der Erfindung wird der ausserhalb des Beckens angeordnete Schalter elektromagnetisch betätigt. Der Schaltimpuls wird von einem Schallverstärker bei Schallfrequenzen zwischen 15 kHz und 25 kHz geliefert. Zur Betätigung klatscht der Schwimmer die nassen Hände zusammen.The invention therefore also relates to a switch that does not require the push of a button. According to the invention, the switch arranged outside the basin is actuated electromagnetically. The switching pulse is supplied by a sound amplifier at sound frequencies between 15 kHz and 25 kHz. The swimmer claps his wet hands together to operate.

Die Erfindung soll anhand von Figuren beschrieben werden.

  • Figur 1 zeigt das Gerät in Frontansicht.
  • Figur 2 zeigt den inneren Aufbau des Gerätes.
  • Figur 3 zeigt einen Horizontalschnitt durch das Gerät.
  • Figur 4 zeigt eine Verschwenk-einrichtung.
  • Figur 5 zeigt eine aufsteckbare Düse.
The invention will be described with reference to figures.
  • Figure 1 shows the device in front view.
  • Figure 2 shows the internal structure of the device.
  • Figure 3 shows a horizontal section through the device.
  • Figure 4 shows a pivoting device.
  • Figure 5 shows an attachable nozzle.

Das Gerät ist kastenförmig aufgebaut, wobei der Wassereintritt am unteren Ende 2 des Gehäuses 1 erfolgt. Im Inneren des Gehäuses ist ein Einschnürungselement 3 angeordnet, welches im Querschnitt 4 kreisförmig ausgebildet ist. Konzentrisch unter diesem kreisförmigen Durchtrittsquerschnitt ist der Motor 5 angeordnet, der das Axiallaufrad 6 antreibt. Die Rotationsachse 7 ist zur Kompensation des Laufraddralles seitlich zur Hochachse versetzt, wobei der Versatz so gewählt ist, dass die Mengenverteilung über die horizontale Erstreckung der Austrittsdüse 8 annähernd konstant ist. Bei Linkslauf - auf den Propeller gesehen - ist deshalb ein Versatz nach rechts - von der Düse aus gesehen - vorgesehen. Die Austrittsfläche der Austritts-düse 8 ist annähernd so gross wie die Durchtrittsfläche im engsten Querschnitt 4 des Einschnürungselements 3, so dass Verzögerungsverluste vermieden werden. Die Breite sollte der Körperbreite eines Schwimmers entsprechen.The device is box-shaped, the water entering at the lower end 2 of the housing 1. A constriction element 3 is arranged in the interior of the housing, which is circular in cross section 4. The motor 5 is concentric below this circular passage cross section arranged, which drives the axial impeller 6. The axis of rotation 7 is offset laterally to the vertical axis in order to compensate for the impeller twist, the offset being selected such that the quantity distribution over the horizontal extent of the outlet nozzle 8 is approximately constant. For counterclockwise rotation - when looking at the propeller - there is therefore an offset to the right - as seen from the nozzle. The outlet area of the outlet nozzle 8 is approximately as large as the passage area in the narrowest cross section 4 of the constriction element 3, so that delay losses are avoided. The width should correspond to the body width of a swimmer.

Figur 2 zeigt das Gerät in der Seitenansicht. Der Motor 5 wird durch eine Schelle 20 gehalten, die über Klemmstücke 21 auf den Rohren 22 höhenverstellbar befestigt wird. Die den Klemmen dienenden Schrauben 23 sind zur Höheneinstellung von aussen zugänglich.Figure 2 shows the device in side view. The motor 5 is held by a clamp 20 which is attached to the tubes 22 in a height-adjustable manner via clamping pieces 21. The screws 23 serving for the clamps are accessible from the outside for height adjustment.

Figur 3 zeigt den horizontalen Querschnitt durch das Gehäuse 1 und die hindurchgeführten Halterohre 22 sowie den Motor 5. Das Kabel 30 wird durch eines der Rohre 22' hindurchgeführt. An der Rückseite befindet sich ein Abstützelement 34, mit dem der Abstand des Gerätes von der Wandung eingestellt werden kann.FIG. 3 shows the horizontal cross section through the housing 1 and the holding tubes 22 passed through and the motor 5. The cable 30 is passed through one of the tubes 22 ′. At the back there is a support element 34 with which the distance of the device from the wall can be adjusted.

Die H-alterohre 22 werden längs der inneren Kante des auf den Rohrabstand eingezogenen Rückenbereiches 33 des Gehäuses 1 geführt, wodurch das Gehäuse ohne weitere Führungselemente parallel zu den Rohren gehalten wird. Der abgekröpfte Bereich 21' sollte unmittelbar oberhalb des Beckenrandes 40 verlaufen, damit Abdeckeinrichtungen keine Behinderung erfahren.The H-age tubes 22 are guided along the inner edge of the back region 33 of the housing 1 drawn into the tube spacing, as a result of which the housing is held parallel to the tubes without further guide elements. The bent area 21 'should run directly above the pool edge 40 so that covering devices are not obstructed.

Figur 4 zeigt eine alternative Ausbildung der Rohre, bei denen ein Schwenkgelenk im Bereich der Düse vorgesehen ist, welches ein Verschwenken des Gerätes bis fast zur horizontalen Lage ermöglicht. Der Strahl tritt in der gezeigten Höheneinstellung aus der Wasseroberfläche aus.Figure 4 shows an alternative design of the tubes, in which a swivel joint is provided in the region of the nozzle, which allows the device to be pivoted almost to the horizontal position. The jet emerges from the water surface in the height setting shown.

Figur 5 zeigt eine alternative Anordnung, bei der - wie in Figur 5a gezeigt - der austretende Strahl durch ein Düsenelement 50 in die horizontale Richtung gelenkt wird, während der Strahl in Figur 5b durch Umstecken dieses Elementes in die Position 50' annähernd vertikal austritt.FIG. 5 shows an alternative arrangement in which - as shown in FIG. 5a - the emerging jet is directed in the horizontal direction by a nozzle element 50, while the jet in FIG. 5b emerges approximately vertically by repositioning this element in the position 50 '.

Zur Einschaltung des Gerätes ist vorgesehen, einen magnetisch betätigten Schalter über ein Steuergerät zu betätigen. Dieses Steuergerät besitzt ein Mikrofon und einen Mikrofonverstärker mit einem Resonanzkreis , dessen Resonanzfrequenzen zwischen 15 kHz und 25 kHz liegen. Durch dieses Steuergerät ist es möglich, das Gerät berührungslos ein- und auszuschalten. Die Schallerzeugung erfolgt in bekannter Weise durch eine Ultraschallpfeife oder aber'erfindungsgemäss durch Klatschen. Es hat sich gezeigt, dass ein Klatschen mit nassen Händen sehr hohe Schallamplituden im genannten Frequenzbereich erzeugt und deshalb zur Schaltung des Gerätes führt, ohne dass irgendeine Vorrichtung berührt werden muss.To switch on the device, it is provided to actuate a magnetically operated switch via a control device. This control unit has a microphone and a microphone amplifier with a resonance circuit, the resonance frequencies of which are between 15 kHz and 25 kHz. This control unit makes it possible to switch the device on and off without contact. The sound generation in a known manner by an ultrasonic whistle or 'according to the invention by clapping. It has been shown that clapping with wet hands generates very high sound amplitudes in the frequency range mentioned and therefore leads to the switching of the device without having to touch any device.

Claims (10)

1. Gegenstromschwimmgerät, bestehend aus einem Unterwasser-Elektromotor, einer Pumpe, einem Gehäuse, einer Austritts- düse und Befestigungsmitteln, dadurch gekennzeichnet, dass der Motor (5) einen Axialpumpenläufer (6) antreibt, der in einer Einschnürung (3) des Gehäuses angeordnet ist, wobei der engste Querschnitt (4) dieser Einschnürung mit dem Querschnitt der Austrittsdüse (8), der die Einschnürung (3) nachgeschaltet ist, annähernd zusammenfällt, und wobei Motor, Pumpenläufer, Einschnürungselement und Austrittsdüse von einem Gehäuse (1) umgeben sind, dessen Breite mit der Breite der Austrittsdüse (8) annähernd zusammenfällt.1. countercurrent swimming device, consisting of an underwater electric motor, a pump, a housing, an outlet nozzle and fastening means, characterized in that the motor (5) drives an axial pump rotor (6), which is arranged in a constriction (3) of the housing is, the narrowest cross section (4) of this constriction approximately coincides with the cross section of the outlet nozzle (8), which is followed by the constriction (3), and wherein the motor, pump rotor, constriction element and outlet nozzle are surrounded by a housing (1), the width of which approximately coincides with the width of the outlet nozzle (8). 2. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Breite der Austrittsdüse (8) wesentlich grösser ist als die Höhe.2. countercurrent swimming device according to claim 1, characterized in that the width of the outlet nozzle (8) is substantially larger than the height. 3. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Breite der Austrittsdüse (8) etwa der Körperbreite eines Schwimmers entspricht.3. countercurrent swimming device according to claim 1, characterized in that the width of the outlet nozzle (8) corresponds approximately to the body width of a swimmer. 4. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass zur Höhenverstellung zwei Rohre vorgesehen sind, die im Gehäuse geführt werden.4. countercurrent swimming device according to claim 1, characterized in that two tubes are provided for height adjustment, which are guided in the housing. 5. Gegenstromschwimmgerät nach Anspruch 4, dadurch gekennzeichnet, dass der zur Beckenwand weisende vertikale Teil des Gerätegehäuses (1) so weit eingezogen ist, dass die Rohre (22) längs der vertikal verlaufenden Kanten geführt werden.5. countercurrent swimming device according to claim 4, characterized in that the vertical part of the device housing (1) facing the pool wall is drawn in so far that the tubes (22) are guided along the vertically extending edges. 6. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass das Gehäuse (1) gegen die Schwimmbadwand mit einer Vorrichtung (23) abgestützt ist, die eine Verschwenkung der Austrittsdüse um eine horizontale Achse zulässt.6. countercurrent swimming device according to claim 1, characterized in that the housing (1) is supported against the swimming pool wall with a device (23) which allows the outlet nozzle to pivot about a horizontal axis. 7. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Austrittsdüse (50) aus einem umsteckbaren Element (50') gebildet wird, das an einen Stutzen (51) anschlicsst, dessen Austrittsfläche einen Winkel von ca. 45° mit der Horizontalen bildet.7. countercurrent swimming device according to claim 1, characterized in that the outlet nozzle (50) from a removable element (50 ') is formed, which connects to a nozzle (51) whose outlet surface forms an angle of approximately 45 ° with the horizontal. 8. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass die Motorachse (7) bei auf den Propeller gesehen rechts laufendem Motor (5) von der Austrittsdüse (8) aus gesehen, bezogen auf die Gehäusemittelebene (24) links versetzt ist.8. countercurrent swimming device according to claim 1, characterized in that the motor axis (7) when seen on the propeller running right motor (5) from the outlet nozzle (8) seen from the housing center plane (24) is offset to the left. 9. Gegenstromschwimmgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Schalter des Motors durch einen Elektromagneten betätigt wird, der den Schaltimpuls von einem Schallverstärker erhält, welcher bei Schallfrequenzen im Bereich zwischen 15.000 Hz und 25.000 Hz einen Schaltimpuls erzeugt.9. countercurrent swimming device according to claim 1, characterized in that the switch of the motor is actuated by an electromagnet which receives the switching pulse from a sound amplifier, which generates a switching pulse at sound frequencies in the range between 15,000 Hz and 25,000 Hz. 10. Gegenstromschwimmgerät nach Anspruch 1 bzw. Anspruch 4, dadurch gekennzeichnet, dass der abgekröpfte Rohrbereich 21' parallel und unmittelbar über dem Beckenrand (40) verläuft.10. countercurrent swimming device according to claim 1 or claim 4, characterized in that the bent tube portion 21 'runs parallel and directly above the pool edge (40).
EP80102038A 1979-04-17 1980-04-16 Counter-current swimming apparatus Expired EP0017973B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2863/79 1979-04-17
AT0286379A AT375130B (en) 1979-04-17 1979-04-17 COUNTERFLOW POOL

Publications (3)

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EP0017973A2 true EP0017973A2 (en) 1980-10-29
EP0017973A3 EP0017973A3 (en) 1980-12-10
EP0017973B1 EP0017973B1 (en) 1984-11-28

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EP80102038A Expired EP0017973B1 (en) 1979-04-17 1980-04-16 Counter-current swimming apparatus

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US (1) US4352215A (en)
EP (1) EP0017973B1 (en)
AT (1) AT375130B (en)
DE (1) DE3069690D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3653275A1 (en) * 2018-11-13 2020-05-20 van Loon, Jan Counter-current swimming device

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* Cited by examiner, † Cited by third party
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US4561133A (en) * 1983-04-14 1985-12-31 Karsten Laing Jet stream device
US4665572A (en) * 1985-11-01 1987-05-19 Peter Davidson Swimming pool therapy apparatus
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Also Published As

Publication number Publication date
EP0017973A3 (en) 1980-12-10
ATA286379A (en) 1983-11-15
AT375130B (en) 1984-07-10
DE3069690D1 (en) 1985-01-10
EP0017973B1 (en) 1984-11-28
US4352215A (en) 1982-10-05

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