Land vehicles – Ski or skate appliance or attachment – Wind sail for propelling or braking skier or skater
Patent
1982-04-19
1984-12-25
Mitchell, David M.
Land vehicles
Ski or skate appliance or attachment
Wind sail for propelling or braking skier or skater
114 39, 114 43, A63C 300
Patent
active
044899572
DESCRIPTION:
BRIEF SUMMARY
The present invention refers to a tool for sailing with skates, skis, roller-skates or corresponding gears. The tool is intended to be used together with a mast equipped with boom and sail (rig), preferably a to-day generally occuring wind-surfing sail.
Tools for skate and ski sailing are well-known. In the simplest case such a tool consists of a sail which is stretched over crossed tubes of metal or bamboo. The disadvantage of this way of sailing is that the sailor must carry the weight of the sail with his hands and back. This limits the sailor's possibility of sheeting the sail. In sailing with ice yachts the said is arranged on a skeleton which is provided with runners. The sail is sheetable. The disadvantage of this way of sailing is, however, that the sailor must invest large sums in skeleton and sail.
Recently, wind surfing has become a very popular sport. However, the wind-surfers cannot practice the sport in wintertime.
The present invention aims at providing a tool which permits not only skate sailing but also ski sailing, roller-skate sailing, skate board sailing etc. by using a conventional wind-surfing sail with mast and boom as used in the wind-surfing sport. As distinct from the skeleton of ice yachts as mentioned by way of introduction, the tool has to be cheap and easy to transport to and from the place of the sailing. Furthermore, the tool is to be used for carrying the wind-surfing sail at a place situated between the sailor's legs at the same time as the sailor has to be able to move his legs independently of each other and rather unhampered by the tool. The mast of the wind-surfing sail, thus being affixed to the tool, has to be capable of swinging unhindered to both sides and has also to be capable of tilting forward and backward. Also, the mast has to be rotatable about its longitudinal axis.
The characteristics of the invention are a carrier bar, fastening points movable in the longitudinal direction of the carrier bar for connection at the sailor's feet or a corresponding point, centering means for controlling the position of the fastening points along the carrier bar so that the centre of the carrier bar is always substantially half-way between the fastening points, and a holder articulately mounted at the centre of the carrier bar for fastening a sail-carrying mast.
The invention will be described more in detail with reference to the attached drawing in which:
FIG. 1 is an exploded view of the tool according to the present invention,
FIG. 2 shows the tool mounted for skate sailing, and
FIG. 3 is a detail view of an embodiment of a centering member included in the tool.
In FIG. 1 a carrier bar 1 is shown in the form of a piece of tube having flattened end portions 2, 3. In either flattened end portion there is a through opening 4 and 5, respectively. In the middle of the carrier bar there are two aligned openings 6, 7 which are at right angles to the longitudinal axis of the carrier bar. A pivot pin in the form of a bolt 8 which is threaded only in the front end thereof is put through the openings 6 and 7. Thereupon, the pivot pin has threaded on to it in turn a bushing 9 of rubber or plastic, a sleeve 10, another bushing 11 of plastic or rubber, and a nut 12. At its bottom the sleeve 10 has two aligned openings through which the pivot pin is threaded. The bushings 9 and 11 each have a through opening through which the pivot pin extends. By means of the nut 12 the bushing 11 is then tightened against the sleeve 10 which in turn tightens the bushing 9 against the peripheral surface of the carrier bar. The nut is tightened only so firmly that the sleeve 10 may rotate about the pivot pin 8.
Before a conventional wind-surfing sail is used together with the tool according to the present invention the universal joint conventionally present at the mast foot of the wind-surfing sail must first be removed. The sail is stretched tight between the mast top and the mast foot by means of a sleeve 14 inserted in the foot 13 of the mast and provided with holes 15 into which means for stretching
REFERENCES:
patent: 2213754 (1940-09-01), Thirring
patent: 3349741 (1967-10-01), Herbst
patent: 3487800 (1970-01-01), Schweitzer
patent: 3996873 (1976-12-01), Weghorn
patent: 4037553 (1977-07-01), Marker
patent: 4311324 (1982-01-01), Fries
Eslinger Lewis H.
Mitchell David M.
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