Patent ID: 7628741

Claim:
A device for the exercise of the musculature of the upper arm, the device comprising: telescopically assembled co operating inner and outer tubular elements, each said tubular elements having end closure means at their outer ends; said outer tubular element including an inwardly projecting collar at its inward open end; said inner tubular element provided with an outwardly projecting collar at its inward open end; said collars co operating to prevent the withdrawal of said inner tubular element from said outer tubular element when said tubular elements operate telescopically; said device moveable between a first state in which the telescopic elements are fully extended and a second state in which the telescopic elements are compressible against a bias inside the device to provide a resistance force to rotational movement about the elbow of a forearm in a direction towards an upper arm of the same arm; wherein the device is of a length which allows engagement of one end with a hand of a user and the other end with an upper part of the same arm such that the user can exercise one arm by urging the hand against the upper arm without use of the other arm; wherein said rotational movement extends between the limits of approximately an angle of 90 degrees formed by the forearm and upper arm and a smaller angle between said forearm; said upper arm limited by contact between said forearm and said upper arm and wherein the bias is a compression spring which naturally biases the telescopic elements to their maximum relative extent; wherein, ends of said spring act against said closure means to provide the bias to maximum extent; said maximum extended position is limited by contact between said collars; said end closure means of said outer tubular member comprising an end cap having a threaded sleeve section which mates with a threaded portion at the end of said tubular element and which is removeable to allow access to an interior passage in said device which receives the spring; wherein, the level of force resistance exerted by the device can be adjusted by substituting one biasing spring with another of a different compression resistance; wherein, said end closure means of said inner tubular member is provided with a threaded portion adapted to mate with an external thread on the outside of said inner tubular element; said threaded portion providing adjustment means to enable variation of length between said end closure means; said end closure means of said inner tubular member including a threaded socket; said socket adapted for the attachment of a resilient support pad adapted to fit against the shoulder or hand of a user; said end closure means at the outward end of said outer tubular element is provided with a piston rod extending from said end closure means substantially the length of said outer tubular member.