1989-01-25
1990-12-11
Crow, Stephen R.
Undertaking
272 1B, A63B 6906
Patent
active
049764233
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a rowing device, especially a rowing device to be fastened on a wind surf board, comprising a framework, a fixed seat fastened to the framework and a foot support unit movable in the framework longitudinally with respect to the seat, which foot support unit is provided with detachable rowlock supports.
Conventional racing rowing boats employ, in relation to the hull of the boat, a fixed foot support, fixed rowlock supports and a movable seat. The drawback of a construction like this is that owing to the movements of the rower, the boat must be made long and the centre of gravity of the boat changes continuously, making its running properties worse. The rower also unnecessarily consumes energy to surmount the inertia of the upper part of his body.
To solve these problems, a construction has been suggested where the seat is fixed and the foot support as well as the rowlock supports are movable with respect to the seat. A racing rowing boat like this is known e.g. from GB patent application No. GB A 2 099 773. From German Offenlegungsschrift No. DOS 3 016 857 again, it is known to fasten such a rowing device on a wind surf board or a surf board, whereby the wind surf board can simply be made to a "rowing boat", fitting excellently e.g. for exercise purposes.
The drawback of such an exerciser is, however, that it can only be used during periods when it is possible to row outside.
SUMMARY OF THE INVENTION
The object of the present invention is to provide a rowing device of the type described at the beginning, which is suitable to be used all the year round so that it can be used as an independent rowing exerciser and in summertime, it can be connected to e.g. a wind surf board, whereby it becomes a "rowing boat of racing model" as described above. This possibility to combine is reached in the way described herein.
By means of a combined rowing device and rowing exerciser of the invention, it is possible to make use of already existing wind surf boards, whereby it is easy to effect a "rowing boat" suitable for e.g. exercise, and by means of this device, it is, on the other hand, possible to practice rowing as a versatile form of exercise all the year round, which makes it unnecessary to a have a separate rowing exerciser.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following, the invention is described in more detail with reference to the examples according to the enclosed drawings, where
FIG. 1 shows the basic structure of a rowing device of the invention from above,
FIG. 2 shows the basic structure of the rowing device from the side,
FIG. 3 shows the rowing device of the invention changed into an independent rowing exerciser,
FIG. 3a shows the fastening of the pump cylinder of the rowing exerciser according to FIG. 3 in more detail,
FIG. 4 shows a perspective view of a second embodiment of the rowing exerciser, and
FIG. 5 shows a perspective view of a third embodiment of the rowing exerciser.
DETAILED DISCUSSION
In all figures, the same reference numerals are used for the same parts. The basic structure of the rowing device shown in the FIGS. 1 and 2 comprises a framework 1, below which there are plastic or rubber feet 1a to be brought into contact with the base, which feet also can be of suction pad type to be fastened on a wind surf board. To the framework is fastened a foot support unit 2 moving along the framework by means of rollers 3. The foot support unit 2 is formed by two cross-tubes 4 and by one or two middle tubes 5 combining them. To the middle tube 5 are fastened foot supports 6, which are adjustable in the longitudinal direction and to which the rower fastens his feet e.g. by means of a strap. To each end of each cross-tube 4 are fastened two rollers 3 against the framework, by means of which rollers the foot support unit 2 slides along the framework 1. At one end of the framework, there is a fixed seat 7 with a back board 7a for the rower. The cross-tubes 4 of the foot support unit 2 are formed so that their ends 4a project outside the
REFERENCES:
patent: 1536256 (1925-05-01), Calzetti
patent: 2278591 (1942-04-01), Sak
patent: 3266801 (1966-08-01), Johnson
patent: 4477071 (1984-10-01), Brown et al.
patent: 4618140 (1986-10-01), Brown
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