초록 ▼

A foamed elastomeric seat cushion (10), especially for a wheelchair, has an overall upper part (20) supported by a lower part (30), the lower part rear portion (40) being formed by two like transversely spaced blocks (40a,40b), each block being of sandwich construction with front-to-rear upright lay

A foamed elastomeric seat cushion (10), especially for a wheelchair, has an overall upper part (20) supported by a lower part (30), the lower part rear portion (40) being formed by two like transversely spaced blocks (40a,40b), each block being of sandwich construction with front-to-rear upright layers, and higher density in an intermediate layer than the associated outer layers. These blocks extend forwardly to about the cushion middle, they extend similarly upwardly, they have about equal width with their mutual spacing, and they have layers of about equal thickness. The lower part front portion (50) can be formed with similar blocks (50a,50b), but with transversely directed layers and a smaller block spacing. The upper part can also be of multiple layers (21,22,23) with an increase in density for downwardly successive layers up to no more than the minimum density in the lower part.

대표청구항 ▼

A chair seat cushion made of foamed elastomeric material and bounded by upper, lower, front, rear and two opposed side surfaces, said cushion comprising: an upper part supported by a lower part; said upper part extending continuously to border the whole of said upper surface; said lower part having

A chair seat cushion made of foamed elastomeric material and bounded by upper, lower, front, rear and two opposed side surfaces, said cushion comprising: an upper part supported by a lower part; said upper part extending continuously to border the whole of said upper surface; said lower part having a rear portion formed by two like blocks mutually spaced transversely of said side surfaces; each said block extending to border part of a respective different one of said side surfaces, each said block being of multi-layered construction including at least two layers extending generally parallel with said side surfaces, and with a first one of said two layers in each said block being the furthest layer of its block from the respective side surface and being of less density than the adjoining second one of such two layers.