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Extendable swing arm assembly for a treadmillRelated Patent Categories: Exercise Devices, Involving User Translation Or Physical Simulation Thereof, Treadmill For Foot TravelExtendable swing arm assembly for a treadmill description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060128532, Extendable swing arm assembly for a treadmill. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] 1. Fields of the Invention [0002] The present invention relates to a rocker arm for an electric treadmill, and more particularly, to a device which adjusts to the curvature of the natural swing of the arms of the treadmill's user and, therefore, makes a synchronic movement. [0003] 2. Description of the Prior Art [0004] Many commercially available electric treadmills are provided with two rocker arms swingable backward and forward along with both arms of the operator and fitted to an upright frame, a base frame or a handrail. Even, a resistant element is added to the rocker arms so that the operator can exercise the arm muscle while walking. These disclosures can be seen in U.S. Pat. Nos. 5,460,586, 5,527,245, 5,688,209, 5,431,612, 5,207,622, 5,860,894, 5,709,632, etc. [0005] The rocker arms of the above-mentioned disclosures are swung in parabolic form since they are composed of a single element in combination with a single pivotal point. This point is evidently contrary to the natural exercise mode of the human body so that the user feels uncomfortably during the exercise session when he holds the rocker arms. SUMMARY OF THE INVENTION [0006] It is a primary object of the present invention to remove the above-mentioned drawbacks and to provide a rocker arm for an electric treadmill whose movement path corresponds to the natural swing curvature of the user's hands in order to reach the expected exercise effect. [0007] It's another object of the present invention to provide a rocker arm for an electric treadmill which is provided with a resistance element (e.g. balance weight, small-type hydraulic cylinder unit, etc.) in order to make full use of the rocker arms. BRIEF DESCRIPTION OF THE DRAWINGS [0008] The accomplishment of this and other objects of the invention will become apparent from the following description and its accompanying drawings of which: [0009] FIG. 1 is a schematic drawing of a preferred embodiment of the invention; [0010] FIG. 2 is a schematic drawing of an extendable swing arm assembly for a treadmill; [0011] FIG. 3 is a schematic drawing of the extendable swing arm assembly with its swing arm in extended position; [0012] FIG. 4 is a perspective exploded view of an angled support in accordance with the invention; and [0013] FIG. 5 is a schematic drawing of another preferred embodiment of the extendable swing arm assembly. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT [0014] Referring to FIGS. 1, 2 and 3, an extendable swing arm assembly for a treadmill 10 includes an upright frame 12, a base frame 14, a front support 16 and a rear support 18. The upright frame 12 has an electronic console 20 and two arm supports 22 at both sides thereof. A running band surrounds the base frame 14 for an in-place rotation. In addition, the treadmill 10 has two mounting tubes 24 in each of which one extendable swing arm assembly 30 is received. Both hands of the operator can hold on the extendable swing arm assemblies 30 for a forward and backward movement. Both extendable swing arm assemblies 30 have the same configuration and each include an angled support 31 with an extension arm 311, a swing arm 32 with a handle 321, a mounting yoke 33 with a supporting rod 331, and a resistance element 34. The middle part of the angled support 31 is pivotally attached to the mounting yoke 33. The swing arm 32 is inserted from an open end of the angled support 31 into the angled support 31 and preloaded by a spring 312 so that the swing arm 32 moves in an extended and retracted position. Moreover, the supporting rod 331 at the bottom of the mounting yoke 33 is inserted into the mounting tubes 24. The resistance element 34 is pivoted at the rear end of the extension arm 311 and a base 332 of the supporting rod 331. [0015] The above described mounting tube 24 is installed at the internal side of the upright frame 12 of the treadmill 10. So it can determine the position of the extendable swing arm assembly 30 and have the pivotal movement in proper direction. [0016] By use of the swinging design of the angled support 31 and the swing arm 32, the movement path of the extendable swing arm assembly 30 corresponds to the swinging curvature of user's arms. So the expected effect is reached. [0017] In order to prevent the swing arm 32 from drawing out of the angled support 31, a metal cap 35 is installed inside the near end of the angled support 31. [0018] When the swing arm 32 is moved to bring the basic angled support 31 in rotation, a tappet 341 of the resistance element 34 will be extended. In this way, the movement of the operator will be hindered to reach the effect of training his muscles. Meanwhile, the spring 312 inside the angled support 31 is pulled in an extended position. When the force acting on the swinging arm 32 disappears, the spring 312 will return to its original state and is located within the angled support 31. [0019] The resistance element 34 is constructed as spring, hydraulic cylinder, preloaded hydraulic cylinder, etc. with the resisting function. [0020] Also, the invention utilizes the swing arm 32 or the handle 321. One or more heavy objects can hang on them (not shown). So it can bring an additional resistance to the movement so as to reach a better training effect on the muscle. Continue reading about Extendable swing arm assembly for a treadmill... Full patent description for Extendable swing arm assembly for a treadmill Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Extendable swing arm assembly for a treadmill 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. Start now! - Receive info on patent apps like Extendable swing arm assembly for a treadmill or other areas of interest. ### Previous Patent Application: Training apparatus Next Patent Application: Magnetic dampening unit for an exercise gym apparatus Industry Class: Exercise devices ### FreshPatents.com Support Thank you for viewing the Extendable swing arm assembly for a treadmill patent info. 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