1. Seat lift for Easy Lift manual wheelchairs
$2.9 Billion manual wheelchair market (2018)
Compact User’s Easy to use voice Stable $ $1000 - $2000
CUSTOMER NEED PRODUCT ATTRIBUTE ENGINEERING SPECIFICATION Convenient elevation and lowering Translation range Translates 6” vertically in < 5 seconds of seat to perform activities Average person exerts < 15 W of elevation Controlled elevation and lowering Translation capacity power; lowers at < 5 in/s Locks elevation and holds user at Gas spring oil chamber locking mechanism Locking mechanism any height within range supports up to 400 lb Can be installed on a wheelchair for Retrofits on top of standard wheelchair seat Wheelchair compatibility extended use size of 18” x 18” User can lean forwards, backwards, Device does not tip over, remains flat on Stability and sideways to perform activities wheelchair seat Lightweight, portable Weight Device weighs < 10 lb
Translation mechanism seat frame gas cylinder supporting pulley system scissor lift gas cylinder rack and pinion bracket
Control interface push button bicycle brake push paddle
Addressing mockup model feedback Next Improving stability of device steps Simplifying and adapting installation process
Citations [1] Steelcase Chair Parts, Steelcase 465 Think Chair Replacement Gas Cylinder, https://www.steelcasechairparts.com/shop/gas-cylinders/steelcase-465-think-chair-replacement-gas-cylinder/, [12] Alter, L., The Vycle is a human powered elevator, https://www.treehugger.com/sustainable-product- (Accessed 10/15/2018). design/vycle-human-powered-elevator.html, (Accessed 10/13/2018).. [2] Felder Machinery Imports, FAT 300 Scissor Lift Table, https://www.feldercanada.com/products/felder-420-421, [13] Allegro Medical, Roho Enhancer Cushion, https://www.allegromedical.com/cushions-covers-backs-c544/roho- (Accessed 10/16/2018). enhancer-cushion- p569261.html?CS_003=9164468&CS_010=1b880b502fc601326343000c298f9c78&gclid=EAIaIQobChMI8Kyqv8KM3gIV [3] AliExpress, Bike Bicycle Lift Ceiling Mounted Hoist Storage Garage Pulley Rack 45 LBS Capacity Durable Metal CluGCh26Cw1NEAQYASABEgIpkPD_BwE#788+569261+03, (Accessed 10/17/2018). Black Lift Assemblies, https://www.aliexpress.com/item/Hot-Sale-Bike-Bicycle-Lift-Ceiling-Mounted-Hoist-Storage- Garage-Hanger-Pulley-Rack-Metal-Black-Lift/32803975101.html, (Accessed 10/16/2018) [14] Uline, Manual Lift Table - Double Scissor , 770 lb, 36 x 20”, https://www.uline.com/Product/Detail/H-1784/Lift- Tables/Manual-Lift-Table-Double-Scissor-770-lb-36-x-20?pricode=WA9216&gadtype=pla&id=H- [4] Kissing and Hanover, Pfaffsilberblau presents with new ZWW Ex wall-mounted rack and pinion jack for use in 1784&gclid=Cj0KCQjw6fvdBRCbARIsABGZ- potentially explosive and hygienically critical areas, vT8jHBmzqKLMsdT1NmdO51aME6KIV_B0PyY7j2lP747xi6aOKgtYjYaAntLEALw_wcB&gclsrc=aw.ds, (Accessed https://www.presseagentur.com/pfaffsb/detail.php?pr_id=1774&lang=en, (Accessed 10/16/2018) 10/13/2018). [5] The Home Depot, Inc., 12 in. Chrom Office Chair Gas Lift Cylinder with 350 lb. Load Rating, [15] Varidesk, Varichair, https://www.varidesk.com/products/standing-desk-chair- https://www.homedepot.com/p/Katu-12-in-Chrome-Office-Chair-Gas-Lift-Cylinder-with-350-lb-Load-Rating-CW- varichair?c3ch=PLA&c3nid=291244552487&gclid=Cj0KCQjw6fvdBRCbARIsABGZ- 80/206856317, (Accessed 10/16/2018). vS6L8qYb92xNKMICQG7p8PQbZf5JuzLaPl2dbCjJj4DN5FXWnQAWlcaAlvHEALw_wcB, (Accessed 10/13/2018). [6] The Bike Shack, Brakes, https://provincetownbikeshack.com/index.php?m=sales, (Accessed 10/16/2018). [16] REI, Avid FR-5 Brake Levers, https://www.rei.com/product/751084/avid-fr-5-brake- levers?CAWELAID=120217890000811067&CAGPSPN=pla&CAAGID=15877513960&CATCI=pla- [7] Sparkfun, Mini Pushbutton Switch, https://www.sparkfun.com/products/97, (Accessed 10/16/2018). 290805469376&cm_mmc=PLA_Google|404_41683|7510840015|none|aa2742d5-1cd5-4c69-a76e- be600ef54b2a|pla-290805469376&lsft=cm_mmc:PLA_Google_LIA|404_41683|7510840015|none|aa2742d5-1cd5- [8] Olenin, G., 2016, “Design of hydraulic scissors lifting platform”, B.S. Thesis, Department of Mechanical 4c69-a76e-be600ef54b2a&kclid=aa2742d5-1cd5-4c69-a76e- Engineering and Productionn Technology, Saimaa University of Applied Sciences. be600ef54b2a&gclid=EAIaIQobChMIm8amuK6M3gIViFmGCh3OTwlSEAQYBCABEgIWDvD_BwE, (Accessed 10/17/2018). [9] Medline, Medline MDS805162 Aluminum Forearm Crutches, Youth, Pack of 2, https://www.amazon.com/Medline-MDS805161-Aluminum-Forearm- [17] Duro-Med, Duro-Med Chair Lift, Chair Assist, Chair Seat Lift Assist Cushion, Black, Crutches/dp/B00083DFPQ?keywords=crutches&qid=1539300633&sr=8-11&ref=sr_1_11&th=1, (Accessed 10/13/2018). https://www.amazon.com/Duro-Med-Chair-Assist-Cushion-Black/dp/B000BO9W5O, (Accessed 10/17/2018). [10] McMaster-Carr, Gas Springs, https://www.mcmaster.com/gas-lifts, (Accessed 10/14/2018). [18] The Betty Mills Company, Apex-Carez Upeasy Seat Assist Standard Manual Lifting Cushion, Navy Blue, 1/EA, https://www.bettymills.com/upeasy-seat-assist-standard-manual-lifting-cushion-navy-blue-1/ea-apex-carex- [11] Duro-Med, DMI Polyfoam Wheelchair Seat Cushion, Standard Foam Seat Cushion for Chairs, rmupe1?utm_source=cpc- https://www.amazon.com/Polyfoam-Wheelchair-Cushion-Standard- strat&utm_medium=cpc&utm_campaign=parts&utm_keyword=INDRMUPE1&utm_content=Medical&gclid=EAIaIQo Pressure/dp/B000FZVTPU?keywords=wheelchair+cushion&qid=1539270810&sr=8-6&ref=sr_1_6, (Accessed bChMIuqmVzcGM3gIVAkwNCh0yLA_xEAkYASABEgK1A_D_BwE, (Accessed 10/17/2018). 10/13/2018).
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