WO1993011038A1 - Ski a propulsion manuelle - Google Patents

Ski a propulsion manuelle Download PDF

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Publication number
WO1993011038A1
WO1993011038A1 PCT/AU1992/000648 AU9200648W WO9311038A1 WO 1993011038 A1 WO1993011038 A1 WO 1993011038A1 AU 9200648 W AU9200648 W AU 9200648W WO 9311038 A1 WO9311038 A1 WO 9311038A1
Authority
WO
WIPO (PCT)
Prior art keywords
craft
floats
hydrofoil
platform
aquatic
Prior art date
Application number
PCT/AU1992/000648
Other languages
English (en)
Inventor
Anthony John Lane
Original Assignee
Anthony John Lane
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 Anthony John Lane filed Critical Anthony John Lane
Publication of WO1993011038A1 publication Critical patent/WO1993011038A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H16/00—Marine propulsion by muscle power
    • B63H16/08—Other apparatus for converting muscle power into propulsive effort
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/30—Propulsive elements directly acting on water of non-rotary type
    • B63H1/36—Propulsive elements directly acting on water of non-rotary type swinging sideways, e.g. fishtail type

Definitions

  • the specification further states that, preferably, the oscillatory downward force is applied as the user "rocks" from side to side. It is also preferred that a support means be attached to the platform or float(s) so that the user can, in the words of the specification, "easily apply the alternating downward force with his legs to the sides of the platform as required without falling off”.
  • This invention relates to aquatic craft and, in particular, to aquatic craft capable of propulsion by the user or by means of the action of water, wind or the like.
  • Craft such as rowing boats, surf skis, canoes, water bicycles and-paddle boats, all of which are propelled by the user, are well known. However, it is generally necessary to exert considerable physical energy in their propulsion. Moreover, devices such as surfboards and sailboards, which are subject instead to movement by waves and wind are available, but they suffer from being subject to these very elements. Accordingly, they are either unable to move if conditions are not adequate, or alternatively, may be propelled out of control where conditions are excessive.
  • the necessary motion required to impart forward movement is primarily a simple up and down bouncing or push-pull type of motion which can be easily achieved by exerting a downward pressure with the legs and releasing same, utilising the facility of a support rail or the like, rather than a motion characterised by rocking from side to side.
  • the required motion is analogous to the motion required to ride a pogo stick, albeit in a more gentle and fluid way.
  • the present invention has therefore been conceived out of the need to provide a more stable and manoeuvrable craft than previously known, having an easier mode of operation.
  • such a design may incorporate improved safety as well as the ability to be easily dismantled and reassembled to provide ease of transportation and storage. It is therefore an object of the present invention to substantially overcome, or ameliorate, the aforementioned disadvantages.
  • the present invention provides an alternative to previously proposed craft.
  • an aquatic craft capable of manual operation, comprising at least one platform to accommodate a rider and support means associated therewith to allow for the rider to hold on to the craft, the platform being supported, in use, in a substantially horizontal position above the surface of the water by at least two substantially identical floats, or two floats being substantially mirror images of each other, at least one hydrofoil being rigidly attached to the at least two floats and projecting therefrom to facilitate forward propulsion of the craft when an oscillatory downward force is applied to said hydrofoil, so that in use the forward movement of the craft is imparted by a simple up and down bouncing or push-pull motion exerted by the user pushing downwardly with his legs and in turn refraining from such pushing whilst holding on to the support means, said up and down motion not requiring the craft to be rocked from side to side.
  • the preferred form of the invention will comprise just two floats interconnected by means of a single platform. More preferably the craft will comprise just one hydrofoil attached by suitable struts to the underside of each float.
  • the support means is provided in the form of a handle or rail, for example a handrail, releasably attached to the floats or the platform.
  • the handrail will more preferably comprise a substantially horizontal portion located between a pair of downwardly pointing legs or posts which are attached to respective floats at location points ahead of the platform.
  • the craft of the present invention may be controlled merely by weight distribution rather than by the need for rudders or other steering gear.
  • the hydrofoil be made from a single foil element or wing having a width approximately the same as the overall width of the craft. Furthermore the ends of the foil or wing tips may be so shaped as to reduce drag and turbulence, which is otherwise produced as a result of the vortex created by the ends of the wings provided in the aforementioned prior art craft.
  • the craft of the present invention may be readily dismantled and reassembled without the need for tools, to facilitate easy transport and storage.
  • the relative location of the hulls and the bracing thereof is shared between the three spaced apart crossover elements, namely the handrail, the platform and the hydrofoil assembly.
  • individual components may be simply connected allowing for hand assembly.
  • the connection of the platform to the floats may be conveniently achieved by pressing interlocking ridges provided on location lugs associated with the floats into corresponding recesses on the underside of the platform.
  • the hydrofoil assembly as noted above comprises the hydrofoil proper and the two struts for connection of the assembly to respective hulls.
  • the free ends of the struts may be provided with flanges for insertion into correspondingly shaped location slots moulded into the respective undersides of the hulls.
  • Each location slot is preferably angled up into the hull and when the flanges of the strut are fully inserted, an integrally moulded plastic retaining lug is able to engage and lock the strut and hence the foil assembly in place. It may be released by pressure on a lever that flexes a section of the assembly, thereby releasing the retaining lug and allowing removal of the foil assembly.
  • the handrail may be suitably connected to the craft by inserting its lower ends (i.e. the downward posts) into moulded tubes located in each float and tightening, for example, a rotatable cam lock thereabout, in order to fix the hand rail at the desired height.
  • a suitable angle of entry for the posts of the handle that is to say, inclined away from the vertical towards the front of the craft, it is possible to position the hand rail not only at various heights but also forward and backward relative to the expected reach associated with a person for whom the height of the handle is thus set.
  • the invention therefore allows for the craft to be easily disassembled simply by hand (without tools) for transport and storage and reassembled for use also by hand, whilst at the same time providing appropriate adjustment for the handrail position.
  • the components of the craft and particularly the floats and platform may be produced by rotomoulding in 3mm polyethylene.
  • the hydrofoil may be conveniently manufactured by resin injection moulding in rigid self skinning urethane foam, whilst the struts for the hydrofoil assembly may be injection moulded in polyethylene.
  • FIG. 1 shows a perspective view of an embodiment of a craft or ski arrangement according to the invention
  • FIG. 2 is an exploded perspective view of the craft illustrated in Figure 1 ,
  • FIG. 3 is a side view of the craft shown in Figure 1 ,
  • FIG. 4 is a plan view of the craft shown in Figure 1 .
  • FIG. 5 is a front view of the craft shown in Figure 1 .
  • FIG. 6 is a plan view of one of the floats utilised in the craft illustrated in Figures 1 to 5
  • FIG. 7 is a side view of the float shown in Figure 6
  • FIG. 8 is an inverted plan view of the platform utilised in the craft of Figures 1 to 5,
  • FIG. 9 is a side view of the platform illustrated in Figure 8.
  • FIG. 10 is a front view of the hydrofoil utilised in the craft illustrated in Figures 1 to 5,
  • FIG. 11 is a plan view of the hydrofoil shown in Figure 10.
  • FIG. 12 is an end view of the hydrofoil shown in Figure 10
  • FIG. 13 is a side elevation of the wing or hydrofoil support strut utilised in conjunction with the hydrofoil of Figures 10 to 12,
  • FIG. 14 is a plan view of the support strut illustrated in Figure 13,
  • FiG. T5 is an end view of the support strut depicted in FIG 13,
  • FIG. 16 is an inverted plan view of the detail of the recess underneath each float of Figures 6 to 7 for receiving the strut shown in Fig 13 to 15,
  • FIG. 17 is a cross sectional detail of the recess of Figure 16 through B-B
  • FIG. 18 is a cross sectional view of the recess through A-A of Figure 17,
  • FIG. 19 is a cross sectional detail view of the housing provided in the float depicted in Figures 6 to 7 for receiving the handrail, and
  • FIGS. 20 and 21 are cross sectional views through D-D and C-C respectively of Figure 19.
  • the craf 11 comprises two identical floats 12, connected by way of a platform 13, and a hydrofoil assembly 14, itself comprising a foil element 15 and strut elements 16 for attaching the foil 15 to the undersides of floats 12.
  • a support rail generally referenced 17 comprising a horizontal handrail portion 18 and a pair of legs 19, the rail 17 being connected at the lower ends of its legs 19 to each float 12.
  • the craft 11 may be disassembled.
  • the location and bracing of the floats 12 is shared between the three spaced crossover elements being the handle frame 17, the platform 13 and the drive foil assembly 14, therefore reducing individual item connection loads and allowing for hand assembly connections.
  • the connection of the platform 13 is made to the floats 12 by pressing interlocking ridges 20 on the location lugs 21 into corresponding recesses 22 underneath the platform 13.
  • the removal of the platform 13 is facilitated by hand recesses 31 located along the edges thereof for grasping and pulling on the platform 13.
  • the drive foil assembly 14 as a component is affixed to the underside of the floats 12 by means of the struts 16 which are inserted into the location slots 25 in a moulded retainer under each float 12.
  • the strut 16 is provided with flanges 32 along it upper edge for mating engagement with the slots 25.
  • the location slot 25 is angled up into the respective float 12 and when the strut 16 is fully inserted an integral moulded plastic retaining lug 26 engages to lock the strut 16 and hence foil assembly 14 in place. It is released by pressure on a lever 27 that flexes a section of the assembly thereby releasing the retaining lug 26 and allowing removal of the foil assembly 14.
  • the handle frame 17 is connected by inserting the lower ends of the legs 19 thereof into moulded tubes 23 inside the floats 12 and tightening the clamps 24 which work on a cam lock principle as illustrated, in order to fix the handle frame
  • the twin hulled apparatus 11 works on the principle that forward propulsion is achieved by the user simply pushing up and down on the platform 13.
  • twin hulled configuration of this embodiment has the advantage of increased stability and manoeuvrability.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

Engin aquatique (11) pouvant fonctionner manuellement. Cet engin aquatique (11) comprend au moins une plate-forme (13) sur laquelle se place l'utilisateur et une barre de support (18) associée à ladite plate-forme qui permet à l'utilisateur de se tenir sur l'engin (11). En mode d'utilisation, la plate-forme (13) est supportée en position pratiquement horizontale au dessus de la surface de l'eau par au moins deux flotteurs (12) sensiblement identiques. Au moins un aileron porteur (12) est fixé rigidement sur les flotteurs (12) et dépasse de ces derniers pour faciliter la propulsion en avant de l'engin (11) lorsqu'une force oscillatoire descendante s'applique sur ledit aileron porteur (14). En mode d'utilisation, le déplacement vers l'avant de l'engin (11) est provoqué par une sorte de sautillement ou de mouvement du type pousser-tirer qu'effectue l'utilisateur qui pousse verticalement vers le bas ses jambes et bloque ensuite cette poussée tout en se tenant agrippé à la barre (18); le mouvement vers le haut et le bas n'imposant pas à l'engin d'être secoué d'un côté à l'autre.
PCT/AU1992/000648 1991-12-02 1992-12-02 Ski a propulsion manuelle WO1993011038A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPK9812 1991-12-02
AUPK981291 1991-12-02

Publications (1)

Publication Number Publication Date
WO1993011038A1 true WO1993011038A1 (fr) 1993-06-10

Family

ID=3775862

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1992/000648 WO1993011038A1 (fr) 1991-12-02 1992-12-02 Ski a propulsion manuelle

Country Status (1)

Country Link
WO (1) WO1993011038A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2145820A1 (fr) * 2008-07-16 2010-01-20 Gerd Bär GmbH Bateau avec plateforme abaissable pour nageurs
DE102021005559A1 (de) 2021-11-09 2023-05-11 Jan Grebe Wasserfahrzeug mit Handgriffen, mit ein oder mehreren starr miteinander verbundenen Tragflächen unter Wasser, zum Transport eines Menschen über Wasser, welches durch Bewegung dieser Tragflächen durch diesen Menschen vorangetrieben wird und durch die Flügel während der Fahrt einen Auftrieb erzeugt.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU6262469A (en) * 1969-10-21 1971-04-22 Hepatex Ag Watercraft
GB1236194A (en) * 1968-01-30 1971-06-23 Joachim Spangenberg Improvements in or relating to motorless water-borne vehicles
FR2245523A1 (en) * 1973-03-08 1975-04-25 Maillard Pierre Propulsion system for recreational floating device - vertical movement of legs is converted to forwards movement
FR2453774A1 (fr) * 1979-04-09 1980-11-07 Marjanovic Dragoljub Legere embarcation nautique, dont la propulsion s'effectue par oscilations longitudinales
AU6314086A (en) * 1985-09-26 1987-04-02 Siemens Aktiengesellschaft Preventing overloading of central switching system
JPS62286890A (ja) * 1986-06-04 1987-12-12 Takashi Kagawa 小型船舶推進装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1236194A (en) * 1968-01-30 1971-06-23 Joachim Spangenberg Improvements in or relating to motorless water-borne vehicles
AU6262469A (en) * 1969-10-21 1971-04-22 Hepatex Ag Watercraft
FR2245523A1 (en) * 1973-03-08 1975-04-25 Maillard Pierre Propulsion system for recreational floating device - vertical movement of legs is converted to forwards movement
FR2453774A1 (fr) * 1979-04-09 1980-11-07 Marjanovic Dragoljub Legere embarcation nautique, dont la propulsion s'effectue par oscilations longitudinales
AU6314086A (en) * 1985-09-26 1987-04-02 Siemens Aktiengesellschaft Preventing overloading of central switching system
JPS62286890A (ja) * 1986-06-04 1987-12-12 Takashi Kagawa 小型船舶推進装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, M-700, page 102; & JP,A,62 286 890 (TAKASHI KAGAWA), 12 December 1987. *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2145820A1 (fr) * 2008-07-16 2010-01-20 Gerd Bär GmbH Bateau avec plateforme abaissable pour nageurs
DE102021005559A1 (de) 2021-11-09 2023-05-11 Jan Grebe Wasserfahrzeug mit Handgriffen, mit ein oder mehreren starr miteinander verbundenen Tragflächen unter Wasser, zum Transport eines Menschen über Wasser, welches durch Bewegung dieser Tragflächen durch diesen Menschen vorangetrieben wird und durch die Flügel während der Fahrt einen Auftrieb erzeugt.
DE102021005559B4 (de) 2021-11-09 2023-05-25 Jan Grebe Wasserfahrzeug mit Handgriffen, mit ein oder mehreren starr miteinander verbundenen Tragflächen unter Wasser, zum Transport eines Menschen über Wasser, welches durch Bewegung dieser Tragflächen durch diesen Menschen vorangetrieben wird und durch die Flügel während der Fahrt einen Auftrieb erzeugt.

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