Category: Indoor Environment∨g=

Falls Recovery Lifting Device

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---- PROTOTYPE --------- PURPOSE: To design a device for an individual with mobility disabilities to provide a safe and reliable means to return to his wheelchair after a fall. The Falls Recovery Lifting Device consists of a hydraulic jack, an aluminum base, and stand with a 22 inch attached seat. The jack is a three-ton, long-ram bottle jack, normally used in cranes and engine hoists, which travels vertically by manually pumping a one-piece handle. When the chair is pumped to the desired height, the consumer can easily perform a sliding or standing transfer from the device back into his wheelchair. One hundred and twenty pumps can cause the ram to travel its full height. Releasing the value on the side of the base and pushing down on the ram manually returns the jack. The base is constructed from 2 by 2 inch square aluminum tubing and ½ inch thick solid aluminum plate. The jack is secured to the top portion of the base with a 5/8 inch machine bolt. The bottom portion of the base consists of a 30 by 12 inch plate, bolted to two 30 inch long square tubes. Two 2 inch radius non-rotating wheels are attached to the ends of the tubes making the device easy to move. The device can be picked up by the legs and moved like a wheelbarrow. The seat is constructed from a commercial heavy plastic chair, attached to two sections of 1 inch diameter steel conduit. The conduit is bent to support the seat of the chair and also bend over the back of the chair to form overhead hand grips. The grips are used by the consumer for support when sliding from the ground onto the seat, and during the lift. The seat is connected to the bottle jack via a piece of 2 inch square tubing. The square tubing has a 1 inch clearance hole that fits the top of the lift piston, which allows the seat apparatus to be detached at any time. A track, constructed from two ¾ by ¾ inch aluminum square tubes and mounted behind the chair, prevents the seat from rotating during use. A 2 inch radius non-rotating wheel is attached to the back of the chair to slide on the column of the jack while being guided by the track. The track is secured to L-brackets on the bottom and top of the jack. Cost of parts for the device was about $615. TITLE: Falls Recovery Lifting Device. JOURNAL: NSF 2006 Engineering Senior Design Projects to Aid Persons with Disabilities. REF: Chapter 7: pp. 74-75. PAGES: 3 with cover. 2006.


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