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Gymnastic machineRelated Patent Categories: Exercise Devices, Involving User Translation Or Physical Simulation Thereof, Stair ClimbingGymnastic machine description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070032350, Gymnastic machine. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a gymnastic machine. In particular, the present invention relates to a gymnastic machine which includes an epicycloidal mechanism. In more detail, the present invention refers to a gymnastic machine which includes an epicycloidal mechanism capable of connecting together a device capable of producing a resistive load to an organ for the application of a driving load. [0003] 2. Description of the Prior Art [0004] A mechanism is known from document U.S. Pat. No. 6,334,836, in the name of the present Applicant, of general use which, if applied to a machine for gymnastic exercise, may be usefully employed for connecting a member for applying a muscular driving load, generated by the user of the machine, to resistive means opposing the applied muscular load. The mechanism essentially includes: [0005] a satellite member (an externally-toothed wheel) rigidly carrying a first crank, radial, having a head which rotationally connects the application member applying the load to a pin on the satellite member; [0006] a planetary fixed member (an internally toothed wheel); [0007] a second crank which rotationally connects a rotation centre on the satellite member with a fixed centre on the planetary member; and [0008] transmission means, for the coordinated transmission of a relative motion between the satellite member and the planetary member. [0009] The rotation of the first crank produces, simultaneously and in synchronized manner: [0010] the rotational movement of the satellite member around its own centre of rotation; [0011] the revolving movement of the satellite member around the fixed centre of the planetary member; and [0012] the movement of the pin applying the driving load to the satellite member which occurs along a generally elliptical path, concentric with the fixed centre of the planetary member. [0013] In general, the elliptical path described by the application pin for applying the load can be determined completely from the position of the axes of the ellipse. A first axis of the ellipse, in fact, lies permanently on the straight line identified by the alignment condition of three points: that is, by the alignment condition of the fixed centre of the planetary member, with the movable centre of the satellite member, and with the pin of the satellite member in proximity to which the driving load is applied to the self-same satellite member. [0014] The second axis of the ellipse is obviously perpendicular to the first axis, and passes through the fixed centre of the planetary member. [0015] According to the relative phasing of the various members, it is possible to obtain paths for the application pin for applying the muscular load, however oriented in the plane in which the mechanism lies. [0016] For example, if the mechanism is configured in such a way that the condition of alignment of the three above-mentioned points is reached along a horizontal straight line, then the major axis of the ellipse will be exactly on the vertical. Vice versa, if the condition of alignment of such points is along a vertical straight line, then the major axis of the ellipse will be on the horizontal. The condition of alignment along any oblique line whatsoever allows the major axis of the ellipse to be aligned perpendicularly to this oblique line. [0017] The shape of the elliptical path is determined by the distance separating the centre of rotation of the satellite member and the position of the pin applying the load to the self-same satellite member. In fact, if the pin applying the load coincides exactly with the centre of rotation of the satellite member, the elliptical path of the pin decays into a circle. Vice versa, the greater the distance between the centre of rotation of the application pin, the more marked is the difference in length between the axes of the ellipse. With suitable choices for the dimensions of the mechanism, it is even possible to determine elliptical paths so flattened as to be practically assimilable to straight lines traveled in reciprocal motion by the pin applying the load. In such a device, the adjustment of the paths of the pin applying the load is obtained by varying precisely the characteristic distance mentioned above by assigning to the first crank a conformation capable of allowing the pin applying the load to be positioned at the desired distance from the movable centre of the satellite member. [0018] This entails several disadvantages. In the first place, in fact, it is necessary to have a first crank with a rather considerable longitudinal extension. [0019] In fact the crank should possess an extension such as to allow the positioning of the pin within a more or less broad range of positions corresponding to all those possible for the various users, or at least related to the statistically most common among the various types of users who access the gymnastic machine. But a sizeable longitudinal dimension of the first crank implies a consequent proportional geometrical conditioning of the overall dimensional configuration of the machine using the mechanism. [0020] Another disadvantage, furthermore, is represented by the fact that adjustment of the mechanism through variation of the distance of the application pin applying the load, from the centre of the satellite member is an operation feasible only with the machine stationary. SUMMARY OF THE INVENTION [0021] An object of the present invention is to obviate the disadvantages described above through a mechanism of the type mentioned above, of limited dimensions, in which the adjustment of the path of the application pin applying the load is performable during use. [0022] This and other objects of the present invention, which will become apparent hereinafter, are achieved by providing a gymnastic machine including at least one mechanism for connecting an application member for applying a driving load to resistive means opposing said load. The mechanism is provided with a satellite member connected to the load application member by means of a first crank having a pin on the satellite member with a planetary member, with a second crank which rotationally connects a movable rotation centre on the satellite member to a fixed centre on the planetary member and with transmission means for the coordinated transmission of a relative motion between the satellite member and the planetary member. In the mechanism, the rotation of first crank determines, in synchronized manner, the rotational movement of satellite member around its own centre of rotation, the revolving movement of satellite member around the fixed centre of planetary member, and the movement of pin on satellite member along a generally elliptical path concentric with the fixed centre of planetary member. In the machine, the planetary member of mechanism is supported in freely rotatable manner around an axis passing through the fixed centre, actuating means provides for imparting to planetary member an angular rotation around the fixed centre, to which correlatively corresponds a relative angular variation of the first and second cranks, and a corresponding variation in the orientation of the path of the pin on the satellite member. Continue reading about Gymnastic machine... Full patent description for Gymnastic machine Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Gymnastic machine patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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