초록 ▼

A center of gravity wheelchair with an articulated chassis front and rear caster wheels, in which the main wheels and front and rear caster wheels are arranged in a diamond pattern, and the main wheels and rear caster wheel are carried by a subframe to form a bogie system, with the seat and front ca

A center of gravity wheelchair with an articulated chassis front and rear caster wheels, in which the main wheels and front and rear caster wheels are arranged in a diamond pattern, and the main wheels and rear caster wheel are carried by a subframe to form a bogie system, with the seat and front caster wheel carried by a seat frame assembly articulated with respect to the subframe through a pivoted link arrangement, whereby the seat may be moved forward relative to the main wheels, with a spring and damper connected between the subframe and seat frame assembly to minimize the tendancy for the front caster wheel to lift off the ground when the main wheels are strongly propelled and to provide a shock absorbing structure for traversing rough ground. The diamond pattern provided by the wheels prevents lateral drift of the wheel chair when traversing sloping surfaces, and the articulated frame permits easier curb climbing.

대표청구항 ▼

A center of gravity wheelchair, comprising: an articulated chassis having a subframe to which is mounted a pair of main wheels and a rear caster wheel, and a seat frame assembly carrying a seat and a front caster wheel and connected to the subframe for movement relative thereto between a first posit

A center of gravity wheelchair, comprising: an articulated chassis having a subframe to which is mounted a pair of main wheels and a rear caster wheel, and a seat frame assembly carrying a seat and a front caster wheel and connected to the subframe for movement relative thereto between a first position with the seat positioned over the main wheels and a second position forwardly of the main wheels to facilitate curb climbing; said main wheels and front and rear caster wheels being arranged in a diamond pattern whereby lateral drift of the wheelchair is minimized while traversing sloping surfaces; and resiliently yieldable means connected between the subframe and seat frame assembly to minimize the tendency for the front caster wheel to lift off the ground when the main wheels are strongly propelled, and to provide shock absorption when traversing rough ground.