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Ez-Scoop 2010

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--- DO IT YOURSELF ENTRY --------- PURPOSE: To create a do-it-yourself prosthetic for individuals with upper limb amputation and/or disabilities to use to play lacrosse. Originally developed as part of the Engineering Design and Communication (EDC) class at Northwestern University, The EZ-Scoop 2010 is do-it-yourself prosthetic that enables individuals with upper limb amputation and/or disabilities to catch, throw, scoop, cradle, and check a ball while playing lacrosse. The device consists of two pieces that fit over the user’s stumps. The top hand attachment goes on the dominate hand and the prosthetic allows the stick to rotate and slide with controlled frictional resistance, while the other hand holds the stick fixed into place those axes to allow for control, but also has a stiff wrist joint to allow some slight motion. To create the top hand (main cuff): Measure out a 7.5 by 7.5 inch sheet of thermoplastic then measure out the two 1 inch slates each being 6 inches long and 2.25 inches apart. Using an electric saw, cut the thermoplastic so that just the slats and what is to become the ring remain. Using a heat gun, melt the thermoplastic so it is moldable but not too flimsy—2.25-inch diameter tube can be used to help mold the cut out into a cylindrical shape and then the ends pinched together to make secure seam. Next a wooden block is inserted into the middle of the newly formed attachment. Using a milling machine, drill a hole of a diameter slightly larger than that of the lacrosse stick. The hole should go through both sides of the attachment; additionally, the path of the hole should be perpendicular to the path of the slats. To create the bottom hand (main cuff): Repeat steps 2-6 from the top hand cuff instructions on a 7.5 square inch of thermoplastic then cut another piece of thermoplastic that is 2 by 7.5 inches. This piece is molded using steps from 4-6 from the top hand main cuff instructions. Steps 7 and 8 are performed on the small piece of the bottom hand main cuff then the small piece is placed on the lacrosse stick and the material around the top hole is heated. Using gloved hands, mold the top hole material around the stick so that the stick cannot route and can move only with great force. To create the conical caps and connect them to the larger tubes: Heat a 4-inch piece of thermoplastic until it is completely clear and very flimsy then drape the thermoplastic over a wax paper covered tennis ball and allow it to semi-cool. Heat the edges of the large tube and the newly draped thermoplastic and pinch them securely together. While the material is still heated the edges can be cut off and the caps are left to cool. To create the hinge and elastic strip pairing: Use a power drill to drill two small holes on each of the tube match the measurements of the spring hinge then attach the hinge using eighth inch rivets. Using the rivets, attach the elastic strap to both ends of the large tube so that the elastic strip is parallel to the hinge. To create the athletic nylon sleeve: cut a 7 by 12 inch piece of fabric for each large tube. Sew the fabric together at the edge of the two 6 inch sides and sew the fabric together vertically in three more places to create two pockets of 1 inch width (these pockets fit the two slats). Finally, space the Velcro straps equally sewing the straps onto the athletic nylon sleeve. Instructions for use: The top hand attachment goes on the dominate hand. With the Velcro straps undone, slide the cuff onto the arm with the slats over the wider side of the arm. Tighten the Velcro straps until the cuff is unable to shift but not so tight that the user is comfortable. MATERIALS: Athletic nylon (a 15 square foot of nylon fabric produces 23 sets of prosthetics); 18 by 24 inch sheet of low temperature thermoplastic that is .125-inch thick (produces 5 sets of prosthetics, quantity 2); 1 foot by 1 inch cinching Velcro strap (quantity 4); 37 foot roll of elastic (sufficient to make 75 sets of prosthetics); wooden wedge; wax paper; tennis ball; sewing kit; and a self-closing stainless steel .6875 inch long hinge with eighth inch rivets. TOOLS: Gloves, scissors or a cutting implement, measuring tape, glue gun, electric saw, milling machine, power drill. SKILLS REQUIRED: Knowledge and experience using electric power tools, and sewing skills. TITLE: EZ-Scoop2010. WEBSITE: RecTech Wiki. REF: http://wiki.rectech.org/index.php/EZ-Scoop2010.

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as of: 
06/02/2012
Ez-Scoop 2010