CA1148587A - Sailing device for snow and ice - Google Patents
Sailing device for snow and iceInfo
- Publication number
- CA1148587A CA1148587A CA000403158A CA403158A CA1148587A CA 1148587 A CA1148587 A CA 1148587A CA 000403158 A CA000403158 A CA 000403158A CA 403158 A CA403158 A CA 403158A CA 1148587 A CA1148587 A CA 1148587A
- Authority
- CA
- Canada
- Prior art keywords
- sliding surface
- frame
- sailing device
- periphery
- sailing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B15/00—Other sledges; Ice boats or sailing sledges
- B62B15/001—Other sledges; Ice boats or sailing sledges propelled by sails
- B62B15/002—Other sledges; Ice boats or sailing sledges propelled by sails having skis or runners
Abstract
A B S T R A C T
A sailing device having the mast arrangement to provide steering and propulsion in accord with that in a sailing surfboard is provided with two rear runners and a forward support which is a convex downward sliding surface curving upwardly at the periphery.
A sailing device having the mast arrangement to provide steering and propulsion in accord with that in a sailing surfboard is provided with two rear runners and a forward support which is a convex downward sliding surface curving upwardly at the periphery.
Description
~8S~37 This invention relates to a sailing device for use on snow or ice.
The action of the device is not that of an ice boat but is analogous to that of a sail equipped surfboard. With a sail equipped surfboard, the sail is connected to the board by an articulated mast. The design is such that boom for the sail may be pivotted relative to the axis of the mast to allow selection of the direction of incidence of the wind upon the sail. The articulation of the mast provides the steering. When the mast is tilted forward the board tends to turn out of the wind and when the mast is tilted backward the board tends to turn into the wind.
Attempts have been made to adapt such a device for sailing on ice. Riedel U.S. Patent 4,094,262 shows a frame mounting an articulated mast and having a pivotal sail boom all operating on the same principal as a sail board. A pair of runners similar to ice-boat runners support the rear of the frame or the ice. A forward runner is mounted near the front of the frame and is pivotal relative thereto about an up and down axis. The front runner is castered so that sideways thrusts thereon tend to turn the runner into a fore and off direction. No steering controls are connected to the front runner. It turns in response to the actions of the operator in tilting the mast forward or back.
The Riedel device for sailing on ice has been found to be dangerous for users. Sideways thrusts upon the forward runners create impacts, undesired turning of the front runner and imbalances, all of which tend to upset the balance of the f~
~1~8S87 operator and board and to cause upset and injury. Moreover the Riedel device, because of the relatively narrow runner construction, (and also because of the dangers from the front runner outlined above), is unsuitable for use on snow.
This invention provides a sailing device for use on snow and ice wherein the sail, mast and boom mounting on the frame may be the same as on the Riedel device and indeed, the same as on a sailboard. However, on applicant's device the frame is provided with two rear runners but instead of a third forward runner, is provided with a convex downward surface which curves upward at those portions of its periphery which will face forwardly or to the side relative to the fore and aft axis of the frame. Preferably such upwardly curving contour will exist completely about the periphery with the novel arrangement, the convex downward sliding surface will slide on the snow or ice in any direction under the steering force applied by the forward or rearward tilting of the mast. In operation, sidewise forces on the forward surface are lessened, in comparison to those on the forward runner of Riedel, since such forces from the ice or snow are exerted at a very shallow angle on the convex sliding surface and thus the sliding surface tends to slide over the obstacle rather than to be subjected to a solid impact. Preferably, the two rear runners are designed to have a wide ski type surface for travelling on snow, shaped to provide a central ridge, which acts as a runner on ice and which acts to improve the "tracking"
when on snow or a crust.
Preferably the concave downward surface of the forward sliding support is mounted to allow a limited universal movement ~1~8587 relative to the frame to allow it to tilt more easily to glide over ridges and discontinuities in the snow or ice surface.
Preferably also spring biasing is provided for such universally connected member to tend to return the convex downward member to a median or central position.
The preferred form of the member having the convex downward surface is a wide flat dish which may be of aluminium or plastic or any other suitable material and which resembles, in contour, the saucer-like dish used as a child's sliding toy, on snow, and known as a 'flying saucer'.
The forward sliding support or 'dish' may be attached to the frame so that rotation is not permitted about an up and down (roughly vertical) axis. However the strains on the connection between support and frame and on the frame and on the user are lessened if the saucer is allowed to rotate relative to the frame about a roughly vertical axis.
In addition to the Riedel Patent mentioned above, the following patents were located in a preliminary search and are the closest prior art known to the inventor.
3,794,341 Torok 3,352,567 Swanson 3,436,087 Noland D 194,270 Dunn 3,143,357 Krupnik Such patents, in applicant's opinion are not as relevant as Riedel and do not teach anything relevant to a sailing device of the inventive type.
In drawings which illustrate a preferred embodiment of the invention :
~1~8587 Figure l is a perspective view of a sailing device in accord with the invention, Figure 2 is a vertical cross-section along the lines
The action of the device is not that of an ice boat but is analogous to that of a sail equipped surfboard. With a sail equipped surfboard, the sail is connected to the board by an articulated mast. The design is such that boom for the sail may be pivotted relative to the axis of the mast to allow selection of the direction of incidence of the wind upon the sail. The articulation of the mast provides the steering. When the mast is tilted forward the board tends to turn out of the wind and when the mast is tilted backward the board tends to turn into the wind.
Attempts have been made to adapt such a device for sailing on ice. Riedel U.S. Patent 4,094,262 shows a frame mounting an articulated mast and having a pivotal sail boom all operating on the same principal as a sail board. A pair of runners similar to ice-boat runners support the rear of the frame or the ice. A forward runner is mounted near the front of the frame and is pivotal relative thereto about an up and down axis. The front runner is castered so that sideways thrusts thereon tend to turn the runner into a fore and off direction. No steering controls are connected to the front runner. It turns in response to the actions of the operator in tilting the mast forward or back.
The Riedel device for sailing on ice has been found to be dangerous for users. Sideways thrusts upon the forward runners create impacts, undesired turning of the front runner and imbalances, all of which tend to upset the balance of the f~
~1~8S87 operator and board and to cause upset and injury. Moreover the Riedel device, because of the relatively narrow runner construction, (and also because of the dangers from the front runner outlined above), is unsuitable for use on snow.
This invention provides a sailing device for use on snow and ice wherein the sail, mast and boom mounting on the frame may be the same as on the Riedel device and indeed, the same as on a sailboard. However, on applicant's device the frame is provided with two rear runners but instead of a third forward runner, is provided with a convex downward surface which curves upward at those portions of its periphery which will face forwardly or to the side relative to the fore and aft axis of the frame. Preferably such upwardly curving contour will exist completely about the periphery with the novel arrangement, the convex downward sliding surface will slide on the snow or ice in any direction under the steering force applied by the forward or rearward tilting of the mast. In operation, sidewise forces on the forward surface are lessened, in comparison to those on the forward runner of Riedel, since such forces from the ice or snow are exerted at a very shallow angle on the convex sliding surface and thus the sliding surface tends to slide over the obstacle rather than to be subjected to a solid impact. Preferably, the two rear runners are designed to have a wide ski type surface for travelling on snow, shaped to provide a central ridge, which acts as a runner on ice and which acts to improve the "tracking"
when on snow or a crust.
Preferably the concave downward surface of the forward sliding support is mounted to allow a limited universal movement ~1~8587 relative to the frame to allow it to tilt more easily to glide over ridges and discontinuities in the snow or ice surface.
Preferably also spring biasing is provided for such universally connected member to tend to return the convex downward member to a median or central position.
The preferred form of the member having the convex downward surface is a wide flat dish which may be of aluminium or plastic or any other suitable material and which resembles, in contour, the saucer-like dish used as a child's sliding toy, on snow, and known as a 'flying saucer'.
The forward sliding support or 'dish' may be attached to the frame so that rotation is not permitted about an up and down (roughly vertical) axis. However the strains on the connection between support and frame and on the frame and on the user are lessened if the saucer is allowed to rotate relative to the frame about a roughly vertical axis.
In addition to the Riedel Patent mentioned above, the following patents were located in a preliminary search and are the closest prior art known to the inventor.
3,794,341 Torok 3,352,567 Swanson 3,436,087 Noland D 194,270 Dunn 3,143,357 Krupnik Such patents, in applicant's opinion are not as relevant as Riedel and do not teach anything relevant to a sailing device of the inventive type.
In drawings which illustrate a preferred embodiment of the invention :
~1~8587 Figure l is a perspective view of a sailing device in accord with the invention, Figure 2 is a vertical cross-section along the lines
2-2 of Figure l, Figure 3 is a vertical cross-section along the lines
3-3 of Figure l; and Figure 4 shows a vertical cross-section of an alter-native form of the forward support.
In the drawings, Figure l shows a device in accord with the invention. The frame comprises a platform lO having a plurality of sockets 12 spaced along the longitudinal axis.
A mast mount 14 may be (usually frictionally) fixed in one of the sockets and mast mount 14 is provided with a universal connection 16 so that the mast mey be held in any fore and aft or sideways attitude relative to the platform 10. Means are also provided so that the mast may rotate 360 relative to the platform. Such 360 rotation may be provided for in any of a variety of ways. In the preferred embodiment the universal connection 16 has a bearing 18 above the accordion folds 17 which bearing allows 360 rotation about what is to be the mast axis. Above bearing 18 is provided the extended sleeve 19 which frictionally receives the mast 21. A boom 20 is mounted on the mast (as in a sailing surf board) and the boom, mast and mast mount (or one of them) are designed so that a sail 22 may (here due to bearing 18) be placed any angle relative to the axis of the mast. The mast 21 is inserted to be frictionally received in sleeve 19 to be retained therein by friction although mechani-cal locking means may be provided. All of the specific features 11.48~87 described in this paragraph are part of the well known prior art in the design of sailing surfboards and is similar to what is disclosed in the Riedel device and this invention uses the mast mount, mast, boom and sail in exactly the same manner as these earlier devices. The platform 10 has rigidly attached thereto, a transversely extending bar 24 which may be of wood or metal to mount the side runners 26 and a forwardly extending strut 28 to mount the forward convex downward sliding surface 34. The side runners 26 are preferably not fixedly mounted but are mounted in brackets 30 which are fixed on bar 24 which allow the runners 26 to pivot about a transverse axis relative to the frame. If the device in accord with the invention is to be used on ice only the two runners may be standard ice boat runners of which they are many types including those shown as the rear runners in Riedel. However, if the inventive device is to be used on snow instead of or as well as ice, then the runners 26 should be wide, as shown, to constitute skis and should have a central downwardly projecting and longitudinally extending ridge 30. Thus the ski in cross section (see Figure 3), has one its bottom surface a central downwardly projecting ridge 30 faired on each side into relatively horizontal contours 31 which contours encompass approximately the inner two quarters of the ski. The outer two quarters of the ski 33 are swept gently upwardly. Although this is the preferred arrangement for the skis, it will be understood that the invention is not regarded as limited in this regard. For use on snow surfaces the skis may vary widely from the shape shown and still cooperate with the forward, ~8587 concave downward sliding member, in accord with the intended use of the invention. For use on ice surfaces the ice runners may be combined with skis as in members 26 in the preferred embodiment or may (for use on ice only) be iceboat runners, such as those shown in the Riedel patent referred to.
The forward convex downward sliding support, preferably comprises a surface having an inner downwardly directed surface sloping gently upwardly toward its periphery and adjacent the outer periphery curving more sharply upwardly in a curvature 35 of a smaller radius to provide 360 azimuth in which the dished surface may ride over upward projections in the ice and snowO
The surface 34 is part of di~h 36 and has four upwardly extending braces 38 attached (by welding, brazing or otherwise) at their lower extremities to the dish 34, the braces 38 sloping upwardly toward each other to meet at a horizontal pedestal 40. The forward end of the strut 28 mounts a downwardly projecting bolt or shank 41 as shown, which at its lower end passes through an aperture 42 in the pedestal. Lock nuts or retainer 44 is located on the bolt or shank 41 below the pedestal to retain the dish on the bolt. A compression spring 46 helically extending about the bolt or shank 41 bears upwardly on the forward strut 28 and downwardly on the pedestal 40. The compression spring 46 therefore acts to cushion the shocks between the dish 36 and the strut 28. The compression spring 46 is preferably at top or bottom provided with bearing surfaces spaced from the shank axis so that it biases the dish to central position. The aperture 42 in the pedestal is made larger than that required by the bolt or shank 41 so that the ~1~8587 dish 36 and its pedestal 40 have limited universal movement relative to the bolt 41 and forward strut 28. Due to this arrangement, the dish 36 may tip to various orientations to conform to contours of the ice and snow encountered during use of the device.
Preferably the dish is rotatable about the (approximate) axis of bolt or shank 41. This reduces the strain on the dish 36 and its connection to the strut 28 and reduces the proportion of the force of the impacts of snow and ice on the dish 36 which is transmitted to the frame 10 of the device and to its user. When the dish 36 is connected to be thus rotatable the upward curving periphery must be 360 in a~imuth around the periphery of the dish. If the dish does not rotate and has the same portion of its periphery directed forward at all times then the upturned portion of the periphery need only encompass the forward 180 relative to the fore-and-aft axis of the device. However, an upturn about 360 of periphery is much preferred, since it will sometimes be /i, Jo/LI ~
~ desireable to sail the device in turns which ~ a relative backward movement of the device.
Figure 4 is included to indicate that the dish within the scope of the invention although it will have a downwardly directed annular inner portion 50 and an upwardly curve periphery 52 may have a raised central portion 54 within the scope of the invention.
In use, and with mast and sail mounted, the user stands on platform 10 orienting the sail to drive the device in the wind. To turn the device into the wind, the mast and sail are tilted backward and to turn the device out of the wind the mast and sail are tilted forward. The resultant turns of the device are achieved because the dish 36 is designed to slide with a wide variety of sideways components over the snow and ice. As with a sailing surfboard the user must place his body on the side of the mast toward the wind direction (hence to change sides with each tack) and lean out to compensate for the transverse component of the wind on the sail.
In the drawings, Figure l shows a device in accord with the invention. The frame comprises a platform lO having a plurality of sockets 12 spaced along the longitudinal axis.
A mast mount 14 may be (usually frictionally) fixed in one of the sockets and mast mount 14 is provided with a universal connection 16 so that the mast mey be held in any fore and aft or sideways attitude relative to the platform 10. Means are also provided so that the mast may rotate 360 relative to the platform. Such 360 rotation may be provided for in any of a variety of ways. In the preferred embodiment the universal connection 16 has a bearing 18 above the accordion folds 17 which bearing allows 360 rotation about what is to be the mast axis. Above bearing 18 is provided the extended sleeve 19 which frictionally receives the mast 21. A boom 20 is mounted on the mast (as in a sailing surf board) and the boom, mast and mast mount (or one of them) are designed so that a sail 22 may (here due to bearing 18) be placed any angle relative to the axis of the mast. The mast 21 is inserted to be frictionally received in sleeve 19 to be retained therein by friction although mechani-cal locking means may be provided. All of the specific features 11.48~87 described in this paragraph are part of the well known prior art in the design of sailing surfboards and is similar to what is disclosed in the Riedel device and this invention uses the mast mount, mast, boom and sail in exactly the same manner as these earlier devices. The platform 10 has rigidly attached thereto, a transversely extending bar 24 which may be of wood or metal to mount the side runners 26 and a forwardly extending strut 28 to mount the forward convex downward sliding surface 34. The side runners 26 are preferably not fixedly mounted but are mounted in brackets 30 which are fixed on bar 24 which allow the runners 26 to pivot about a transverse axis relative to the frame. If the device in accord with the invention is to be used on ice only the two runners may be standard ice boat runners of which they are many types including those shown as the rear runners in Riedel. However, if the inventive device is to be used on snow instead of or as well as ice, then the runners 26 should be wide, as shown, to constitute skis and should have a central downwardly projecting and longitudinally extending ridge 30. Thus the ski in cross section (see Figure 3), has one its bottom surface a central downwardly projecting ridge 30 faired on each side into relatively horizontal contours 31 which contours encompass approximately the inner two quarters of the ski. The outer two quarters of the ski 33 are swept gently upwardly. Although this is the preferred arrangement for the skis, it will be understood that the invention is not regarded as limited in this regard. For use on snow surfaces the skis may vary widely from the shape shown and still cooperate with the forward, ~8587 concave downward sliding member, in accord with the intended use of the invention. For use on ice surfaces the ice runners may be combined with skis as in members 26 in the preferred embodiment or may (for use on ice only) be iceboat runners, such as those shown in the Riedel patent referred to.
The forward convex downward sliding support, preferably comprises a surface having an inner downwardly directed surface sloping gently upwardly toward its periphery and adjacent the outer periphery curving more sharply upwardly in a curvature 35 of a smaller radius to provide 360 azimuth in which the dished surface may ride over upward projections in the ice and snowO
The surface 34 is part of di~h 36 and has four upwardly extending braces 38 attached (by welding, brazing or otherwise) at their lower extremities to the dish 34, the braces 38 sloping upwardly toward each other to meet at a horizontal pedestal 40. The forward end of the strut 28 mounts a downwardly projecting bolt or shank 41 as shown, which at its lower end passes through an aperture 42 in the pedestal. Lock nuts or retainer 44 is located on the bolt or shank 41 below the pedestal to retain the dish on the bolt. A compression spring 46 helically extending about the bolt or shank 41 bears upwardly on the forward strut 28 and downwardly on the pedestal 40. The compression spring 46 therefore acts to cushion the shocks between the dish 36 and the strut 28. The compression spring 46 is preferably at top or bottom provided with bearing surfaces spaced from the shank axis so that it biases the dish to central position. The aperture 42 in the pedestal is made larger than that required by the bolt or shank 41 so that the ~1~8587 dish 36 and its pedestal 40 have limited universal movement relative to the bolt 41 and forward strut 28. Due to this arrangement, the dish 36 may tip to various orientations to conform to contours of the ice and snow encountered during use of the device.
Preferably the dish is rotatable about the (approximate) axis of bolt or shank 41. This reduces the strain on the dish 36 and its connection to the strut 28 and reduces the proportion of the force of the impacts of snow and ice on the dish 36 which is transmitted to the frame 10 of the device and to its user. When the dish 36 is connected to be thus rotatable the upward curving periphery must be 360 in a~imuth around the periphery of the dish. If the dish does not rotate and has the same portion of its periphery directed forward at all times then the upturned portion of the periphery need only encompass the forward 180 relative to the fore-and-aft axis of the device. However, an upturn about 360 of periphery is much preferred, since it will sometimes be /i, Jo/LI ~
~ desireable to sail the device in turns which ~ a relative backward movement of the device.
Figure 4 is included to indicate that the dish within the scope of the invention although it will have a downwardly directed annular inner portion 50 and an upwardly curve periphery 52 may have a raised central portion 54 within the scope of the invention.
In use, and with mast and sail mounted, the user stands on platform 10 orienting the sail to drive the device in the wind. To turn the device into the wind, the mast and sail are tilted backward and to turn the device out of the wind the mast and sail are tilted forward. The resultant turns of the device are achieved because the dish 36 is designed to slide with a wide variety of sideways components over the snow and ice. As with a sailing surfboard the user must place his body on the side of the mast toward the wind direction (hence to change sides with each tack) and lean out to compensate for the transverse component of the wind on the sail.
Claims (16)
1. Sailing device comprising :
a frame, means for mounting a mast on said frame on a connection allowing a universal connection between said mast and said frame, a pair of spaced rear runners connected to said frame for supporting it for sliding motion in a primarily longitudinal direction on a surface of snow or ice adjacent one end of said frame, a forward support connected to said frame for supporting it on a surface of snow or ice, said forward support comprising a convex downward sliding surface curving upwardly away from such snow or ice about at least that portion of its periphery which in use will encompass its two forward quadrants.
a frame, means for mounting a mast on said frame on a connection allowing a universal connection between said mast and said frame, a pair of spaced rear runners connected to said frame for supporting it for sliding motion in a primarily longitudinal direction on a surface of snow or ice adjacent one end of said frame, a forward support connected to said frame for supporting it on a surface of snow or ice, said forward support comprising a convex downward sliding surface curving upwardly away from such snow or ice about at least that portion of its periphery which in use will encompass its two forward quadrants.
2. Sailing device as in claim l where said convex downward sliding surface comprises an inner mildly curving area and a surrounding area curving upwardly more sharply toward the periphery.
3. Sailing device as claimed in claim 1 where said sliding surface is substantially circular in plan view.
4. Sailing device as claimed in claim 1 where said sliding surface is mounted to have, at least, limited universal movement relative to said frame.
*Substantially without directional steering contours Cont'd/....
*Substantially without directional steering contours Cont'd/....
5. Sailing device as claimed in claim 2 where said sliding surface is mounted to have at least limited universal movement relative to said frame.
6. Sailing device as claimed in claim 3 where said sliding surface is mounted to have at least limited universal movement relative to said frame.
7. Sailing device as claimed in claim 1 wherein said sliding surface slopes upwardly about its periphery.
Sailing device as claimed in claim 2 wherein said sliding surface slopes upwardly about its periphery.
9. Sailing device as claimed in claim 3 wherein said sliding surface slopes upwardly about its periphery.
10. Sailing device as claimed in claim 4 wherein said sliding surface slopes upwardly about its periphery.
11. Sailing device as claimed in claim 5 wherein said sliding surface slopes upwardly about its periphery.
12. Sailing device as claimed in claim 6 wherein said sliding surface slopes upwardly about its periphery.
13. Sailing device as claimed in claim 3 wherein said sliding surface slopes upwardly about its periphery and said sliding surface is mounted to be pivotal about its circular axis relative to said frame.
14. Sailing device as claimed in claim 6 wherein said sliding surface slopes upwardly about its periphery and said sliding surface is mounted to be pivotal abouts its circular axis relative to said frame.
15. Sailing device as claimed in claims 4,5 or 6 wherein means are provided to resiliently bias said sliding surface Cont'd/...
toward a median orientation relative to the up and down direction of the frame.
toward a median orientation relative to the up and down direction of the frame.
16. Sailing device as claimed in claim 10 wherein means are provided to resiliently bias said sliding surface toward a median orientation relative to the up and down direction of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000403158A CA1148587A (en) | 1982-05-18 | 1982-05-18 | Sailing device for snow and ice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000403158A CA1148587A (en) | 1982-05-18 | 1982-05-18 | Sailing device for snow and ice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1148587A true CA1148587A (en) | 1983-06-21 |
Family
ID=4122800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000403158A Expired CA1148587A (en) | 1982-05-18 | 1982-05-18 | Sailing device for snow and ice |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1148587A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2590535A1 (en) * | 1985-11-28 | 1987-05-29 | Cessou Yves Michel | Articulated land sailed vehicle |
| US4831950A (en) * | 1987-08-28 | 1989-05-23 | Allured Stanley E | Wind propelled apparatus |
| US5277141A (en) * | 1989-02-21 | 1994-01-11 | Karoly Csepregi | Ice and snow surf-board |
-
1982
- 1982-05-18 CA CA000403158A patent/CA1148587A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2590535A1 (en) * | 1985-11-28 | 1987-05-29 | Cessou Yves Michel | Articulated land sailed vehicle |
| US4831950A (en) * | 1987-08-28 | 1989-05-23 | Allured Stanley E | Wind propelled apparatus |
| US5277141A (en) * | 1989-02-21 | 1994-01-11 | Karoly Csepregi | Ice and snow surf-board |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4681333A (en) | Wind propelled land vehicle | |
| US6267392B1 (en) | Snowmobile steering ski | |
| US5249816A (en) | Ski board | |
| EP0634951B1 (en) | Sports conveyance | |
| US4320905A (en) | Vehicle for ice and snow | |
| US5957471A (en) | Snow vehicle | |
| US7500679B2 (en) | Board for supporting front of snow vehicle | |
| US7762564B2 (en) | Ski sledge | |
| US4775161A (en) | Tilt steered sleds | |
| US4289325A (en) | Skateboard | |
| US4014283A (en) | Watercraft, particularly for watersports | |
| US3645347A (en) | Guide means for skis | |
| US7104551B2 (en) | Sliding device for snow sports | |
| IL43131A (en) | Aquatic vehicle | |
| US5277141A (en) | Ice and snow surf-board | |
| AU2001256701A1 (en) | Sliding device for snow sports | |
| CA1148587A (en) | Sailing device for snow and ice | |
| US4165087A (en) | Snow-surface driving vehicle | |
| US5433458A (en) | Dog sled | |
| US5799956A (en) | Two-piece apparatus for sliding on a surface | |
| USRE39012E1 (en) | Snowmobile steering ski | |
| US3646905A (en) | Self-propelled vehicle | |
| US6247984B1 (en) | Steerable towcraft with side fins | |
| US5791957A (en) | Water sports device with elevating disks | |
| US5887538A (en) | Sailboard for a wind powered sailing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |