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  Weightlifting apparatus for pronation and supination exercisesUSPTO Application #: 20080026920Title: Weightlifting apparatus for pronation and supination exercises Abstract: A weightlifting apparatus is operative to continuously provide and adjust a force resistant to a torque produced by an exerciser that performs supination of biceps simultaneously with other exercise motions or pronation of triceps simultaneously with other exercise motions. (end of abstract)
Agent: Law Office Of Y. Kateshov - Scarsdale, NY, US Inventor: Annaniy Berenshteyn USPTO Applicaton #: 20080026920 - Class: 482106 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20080026920. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF INVENTION [0001]1. Field of the Invention [0002]The present invention relates to a weightlifting apparatus operative to provide a continuous adjustable resistant force to a muscle-generated force produced by an exerciser that performs supination of biceps simultaneously with other exercise motions or pronation of triceps simultaneously with other exercise motions. [0003]2. Discussion of the Prior Art [0004]Weightlifting apparatus for performing simultaneously two exercise motions are well known in prior art. A typical structure representative of these apparatus includes a bar with rotatably attached handles and changeable weights which are suspended on the opposite ends of the bar. The structure is configured to allow an exerciser to simultaneously perform, for example, flexing and supination of biceps or extension and pronation of triceps, wherein the supination motion is characterized by turning the palm upward, whereas the pronation motion is performed by turning palm downward. Typically, such a structure is operative to generate a controllable force resistant only to a force generated by flexing/extending motion, but not to a torque generated by supination/pronation motion. Accordingly, muscle development controlled by the supination and/or pronation motions may be not as effective as desired. [0005]Another type of the known weightlifting devices operative to simultaneously perform the supination/pronation exercises in combination with other exercises is operative to utilize weightlifting resistance to, for example, simultaneously perform biceps flexing biceps supination exercises. While the resistance to flexing motion is provided by using changeable weights, which can be easily selected from a very wide range to correspond to the muscle development level of the exerciser, the resistance to supination is caused by friction between the rotatable and not-rotatable parts of a handle assembly. Such a structure does not provide for an easy adjustment of resistance. Moreover, the adjustments range from near-zero to locking is very small and cannot be consistently reproduced, since there is no quantifiable indication of actual resistance. The level of resistance in such an apparatus is dependent on geometrical tolerances, the surface finishes and wears resistance of the involved parts and, therefore, may vary greatly from one apparatuses to the other or during usable life of the same apparatus. Another disadvantage of these apparatus is determined by the fact that if the motion is stopped, for example, at the point where the direction is changed from lifting to lowering the apparatus, a friction force provides no resistance to the supination motion of muscles. Also, a force resistant to a torque, which is generated during supination motion, is generated only when the exerciser lifts the apparatus, but not when the apparatus is being lowered, since during that part of the motion (to the starting position) the hands of the exerciser are exposed to pronation resistance. As a result, the intended muscles are loaded only during 50% of the exercise motion. [0006]Still in another example of known apparatus for simultaneously performing two exercise motions, a spring-loaded supination/pronation motion unit is operative to generate a variable resistant depending whether a spring is in a contracted state or an expanded state during an exercise. However, it is a constant resistant force that is particularly beneficial the desired muscle development. In thus configured apparatus, during early stages of the lifting operation, a force created by the spring is directed through the center of rotation of both rotatable handles and totally equals to its normal component, whereas the tangential component is equal to zero. When the positions of the rotatable handles changes during the exercise, the spring force no longer passes through the center of both of the rotatable handles. During the rotational motion of the handles the normal component of the resultant force is gradually decreasing and the tangential component is increasing until the handles are rotated at 90.degree. from the initial position. At this point the resultant force is equal to its tangential component, and the normal component is equal to zero. The resistance to be overcome by the muscles during the supination or pronation motion depends only upon the tangential component responsible for the generation of the resistant torque. Since this component constantly changes, the apparatus does not provide for constant resistance which, as discussed above, is critical to the muscle development. Yet another type of known apparatus for simultaneously performing two exercise motions, which utilize weightlifting resistance to multiple motions, allows performing only one or a very limited number of exercises and has a complex structure. Furthermore, the motion trajectory is strictly restricted by the device. [0007]A need, therefore, exists for a weightlifting apparatus that allows the development of muscles by carrying out at least two exercise motions simultaneously under consistent, continuous and adjustable load. BRIEF DESCRIPTION OF THE DRAWINGS [0008]The above and other features and advantages of the disclosed apparatus will become more readily apparent from a specific description accompanied by the following drawings, in which: [0009]FIG. 1 is a perspective view of a weightlifting apparatus configured in accordance with one embodiment of the invention; [0010]FIG. 2 is a longitudinal view of the weightlifting apparatus of FIG. 1; [0011]FIG. 3 is a top plan view of the weightlifting apparatus of FIG. 1; [0012]FIG. 4 is a partial sectional view of the left portion of the weightlifting apparatus, which is set for supination exercise motion; [0013]FIG. 5 is a partial sectional view of the left portion of the weightlifting apparatus of FIG. 1, which is set for pronation exercise motion; [0014]FIG. 6 is a sectional view taken along the line A-A of FIG. 2; [0015]FIG. 7 is a sectional view taken along the line B-B of FIG. 2; [0016]FIG. 8 is a perspective view the weightlifting apparatus configured in accordance with a further embodiment of the invention; [0017]FIG. 9 is a perspective view of the weightlifting apparatus of FIG. 8 set for simultaneously performing a combination of supination and flexing exercises; [0018]FIG. 10 is a perspective view the weightlifting apparatus configured in accordance with still another embodiment of the invention; and [0019]FIG. 11 is a perspective view of still of the weightlifting apparatus of FIG. 10 set for simultaneously performing a combination of pronation and flexing exercises. SPECIFIC DESCRIPTION [0020]Reference will now be made in detail to several embodiments of the invention that are illustrated in the accompanying drawings. Wherever possible, same or similar reference numerals are used in the drawings and the description to refer to the same or like parts or steps. The drawings are in simplified form and are not to precise scale. For purposes of convenience and clarity only, directional terms, such as top, bottom, up and down may be used with respect to the drawings. These and similar directional terms should not be construed to limit the scope of the invention in any manner. The words "connect," "couple," and similar terms with their inflectional morphemes do not necessarily denote direct and immediate connections, but also include connections through mediate elements or devices. [0021]Referring to FIG. 1, a weightlifting apparatus 20 is configured in accordance with a first embodiment of the invention and operative to simultaneously perform at least two different exercises involving flexing and supination motions as well as extending and pronation motions. Accordingly, apparatus 20 is configured with two operatively interconnected units including a muscle flexing/extending assembly and a muscle supination/pronation assembly. Continue reading... Full patent description for Weightlifting apparatus for pronation and supination exercises Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Weightlifting apparatus for pronation and supination exercises 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. 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