1987-12-23
1989-05-02
Apley, Richard J.
Undertaking
18832218, A63B 2100
Patent
active
048261564
DESCRIPTION:
BRIEF SUMMARY
The present invention has for object an exerciser comprising at least one movable element on which acts the user for moving it against the action of an antagonistic force.
Such exercisers are known per se. In these apparatus, the antagonistic force which is opposed to the forces applied by the user is produced either by a spring or by a piston moving in a chamber and producing, by means of this movement, a compression of the air contained therein.
In the two cases, this antagonistic force is not constant and increases with the displacement of the movable member on which acts the user of the apparatus.
Now, such a variation of the antagonistic force against which acts the user of the apparatus is not always desirable, on the contrary. One has attempted to remove this drawback while realizing apparatus the antagonistic force of which is produced by counterweights, but this arrangement is not convenient and cumbersome.
The object of the present invention is to furnish an apparatus of the above mentioned type in which the antagonistic force against which acts the user of the apparatus remains substantially constant during the operation.
This object is reached owing to means defined in claim 1.
The drawing shows, by way of example, one embodiment of the object of the invention and modifications.
FIG. 1 is a perspective view of an exerciser.
FIG. 2 is an elevational view, to a larger scale and with a sectional portion, of the apparatus according to FIG. 1.
FIG. 3 is a lateral view thereof, with a partial section, to the scale of FIG. 2.
FIG. 4 is a sectional view on the broken line IV--IV of FIG. 3, to a larger scale.
FIG. 5 is a sectional view on the line V--V of FIG. 4, to a larger scale, some portions being broken, and
FIGS. 6 to 9 are sectional views of a detail of four modifications.
The apparatus represented in FIGS. 1 to 5 comprises a vertical column 1, of square section, which can be secured to a wall, comprising, at its basis, a seat 2 on which is seated the user, and carrying, above this seat, a padded portion 3, constituting a back. The column 1 is mounted on a basis member 4, resting on the ground, provided with a transversal member 5 constituting a foot-rest.
The apparatus comprises, moving in the column 1, a cylinder 6 provided with rollers 7 arranged diagonally, as specially shown in FIG. 4, guiding the cylinder 6 in its displacements in the column 1. This cylinder is rigid with two control arms 8 which are gripped by the user of the apparatus when it is seated on the seat 2 and that he moves downwardly. These two arms 8 are articulated on forks 9 which are themselves secured to the cylinder 6 and which moves themselves in slits 10 provided in the lateral walls of the column 1. The articulation of the arms 8 on the forks 9 is arranged in such a way as to permit the orientation of the arms 8 being adjustable on about 90.degree. in the sense of the arrow 11 of FIG. 4, and being blockable in this position.
The basis 6a (FIG. 5) of the cylinder 6 is provided with an aperture through which passes a rectilinear tube 12 opening in the room provided by the cylinder 6, secured to a mounting member 13 itself secured to the bottom, designated by 14, of the column 1 and which is connected by a duct 15, to a compressor 16 located under the seat 2. This compressor permits to create in the tube 12 and the room 6 a pressure which is higher than the atmospheric pressure. A duct 17 passes through the basis 4 and ends to a manometer 18 (FIG. 1) situated above the rest-foots 5 which permits to the user of the apparatus to know the pressure reigning in the room 6. The tightness between the bottom 6a and the tube 12 is obtained by an annular gasket and by an oil bath 19 situated in the bottom of the room.
The pressure reigning in the room has for effect to oppose itself to the downwards displacements of the cylinder 6 by a force which is function on the one hand of the said pressure and on the other hand of the section of the tube 12. When the cylinder 6 is moved downwardly, the penetration of the tube 12 inside the ro
REFERENCES:
patent: 3696894 (1972-10-01), Brady et al.
patent: 4290600 (1981-09-01), Kobel
patent: 4353547 (1982-10-01), Jenkinson
Apley Richard J.
Bahr Robert W.
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