초록 ▼

The chassis features left and right lateral frames rotatably supporting at their front and rear ends front and rear wheels. The rear wheels are pivoted for steering. First and second connecting members arranged in a cross and lying in a horizontal plane extend between and are attached to the lateral

The chassis features left and right lateral frames rotatably supporting at their front and rear ends front and rear wheels. The rear wheels are pivoted for steering. First and second connecting members arranged in a cross and lying in a horizontal plane extend between and are attached to the lateral frames to confine the movements of the lateral frames into predominantly parallel planes. A third connecting member extends horizontally between and is attached to the lateral frames in a position spaced above the horizontal plane so that when the chassis is viewed from the side at the most only two frame mounting points fall on a straight line. Elastic relative movement between the left and right lateral frames is achieved as a result of the inherent elasticity of the connecting members and in addition resilient mountings at the attachment points of the connecting members to the lateral frames.

대표청구항 ▼

A chassis for invalid wheelchairs including, in combination: (a) left and right lateral frames for rotatably supporting at their forward and rear ends front and rear wheels respectively, said lateral frames lying in spaced generally vertical parallel planes; (b) first and second connecting members a

A chassis for invalid wheelchairs including, in combination: (a) left and right lateral frames for rotatably supporting at their forward and rear ends front and rear wheels respectively, said lateral frames lying in spaced generally vertical parallel planes; (b) first and second connecting members arranged in a cross, lying generally in an horizontal plane between said vertical parallel planes, the extending ends of said members being attached to said lateral frames; and (c) a third connecting member extending horizontally between and attached to said lateral frames in a position spaced above said horizontal plane, said third member being normal to said vertical planes, so that when said chassis is viewed from the side, at the most only two frame mounting points fall on a straight line, said first, second and third connecting members constituting leaf springs providing an elastic connection between the lateral frames permitting slight rotations of the frames in their own planes about an horizontal axis, the attachment points of said members to said lateral frames permitting further elastic relative movements between said lateral frames.