초록 ▼

A wheelchair propelled by rowing action includes a wheelchair frame with a pair of large main rear wheels connected by an axle, a rowing lever pivotally connected to the frame, a steering shaft with a handlebar grip mounted coaxially within the rowing lever and connected by a universal joint to a st

A wheelchair propelled by rowing action includes a wheelchair frame with a pair of large main rear wheels connected by an axle, a rowing lever pivotally connected to the frame, a steering shaft with a handlebar grip mounted coaxially within the rowing lever and connected by a universal joint to a steering linkage connected to caster brackets mounting small front wheels, a pair of ratcheted sprockets mounted on the axle, a pair of sprocket chain segments connected by cables through pulleys to the rowing lever such that pulling and pushing of the rowing lever alternately causes driving engagement of one of the ratchets with the axles for propulsion and causes the other to slip. The leverage exerted by the rowing lever on the ratcheted sprockets is adjustable.

대표청구항 ▼

A wheelchair propelled by rowing action comprising: (a) a wheelchair frame with a wheelchair seat; (b) a pair of laterally spaced main rear wheels affixed to an axle, said axle being rotatably mounted on said frame; (c) at least one steerable front wheel rotatably mounted on a front wheel bracket pi

A wheelchair propelled by rowing action comprising: (a) a wheelchair frame with a wheelchair seat; (b) a pair of laterally spaced main rear wheels affixed to an axle, said axle being rotatably mounted on said frame; (c) at least one steerable front wheel rotatably mounted on a front wheel bracket pivotally connected to said frame; (d) elongated rowing lever means pivotally connected to said frame such that said rowing lever means is capable of reciprocal pivoting movement about a lateral axis of said frame, said lever means including a handle; (e) motion transfer means drivingly engaged between said lever means and said axle such that pivoting motion of said lever means in opposite directions is converted to rotary motion in a single direction which is transferred to said axle to thereby propel said vehicle in a forward direction of said wheelchair; (f) disengageable clutch means coupled between said motion transfer means and said axle and operable when disengaged to cause the slippage of said motion transfer means about said axle in both clockwise and counterclockwise directions; (g) said handle being pivotably to thereby pivot said rowing lever means about a longitudinal axis of said rowing lever means; (h) steering link means operatively connected between said rowing lever means and said front wheel bracket such that pivoting said lever means about said longitudinal axis thereof causing pivoting of said front wheel bracket whereby said vehicle is steered; and (i) said rear wheels being sized and said axle being positioned on said frame directly adjacent to and on opposite sides of said seat to allow propulsion of said wheelchair by an occupant thereof upon disengagement of said clutch means by said occupant manually rotating said rear wheels.