All-Terrain Wheelchair

摘要

An all-terrain wheelchair includes a rigid and easy-to-assemble frame. The frame has a seating area with armrests toward the rear of the frame and an adjustable footrest area toward the front of the frame. Attached to the rear axle of the frame and outside the seating area are found two large rear wheels of a sufficient width to provide flotation over soft surfaces. Attached to the front axle of the frame in front of the footrest area is a single large wheel of a sufficient width to provide flotation over soft surfaces. An ergonomically designed push handle is found at the upper rear of the frame behind the seating area, which allows an assistant to propel the chair forward or pull it backward. The frame in front of the front wheel forms a pull handle, which allows an assistant to pull the chair forward or push it backward. A locking brake mechanism is attached to the rear axle to prevent a rear wheel from travel and render the wheelchair motionless when necessary.

主权项

1. A wheelchair comprising:
a frame comprising of a plurality of interconnected hollow tubes of rigid and lightweight material, said tubing forming at least a left portion, a right portion, a fore portion, an aft portion, a front axle, at least one rear axle, at least one pushing handle located proximate to said aft portion connected horizontally between the left portion of the frame and the right portion of the frame, a pulling handle at the fore portion of the frame and at least one crossbrace located proximate to said fore portion and sandwiched between the left portion of the frame and the right portion of the frame; two rear wheels of sufficient width to allow floatation on non-paved surfaces, said wheels rotationally mounted at the aft portion of the frame on at least one rear axle; at least one front wheel of sufficient width to allow floatation on non-paved surfaces, said wheel rotationally mounted at the fore portion of the frame on a front axle and sandwiched between the left portion of the frame and the right portion of the frame; a seating surface sandwiched between and supported by the left portion of the frame and the right portion of the frame and near the aft portion of the frame; a footrest sandwiched between and supported by the left portion of the frame and the right portion of the frame and the crossbrace, said footrest located behind the front wheel and; a backrest sandwiched between and supported by the left portion of the frame and the right portion of the frame.