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US 4,064,578 AGranted
Therapeutic cushion
OwnerJunji Yamadainventor
Life of this patent
Estimating the term…
Abstract
A therapeutic seat cushion for use with a chair which comprises a sponge mat layer provided with an underlying slider layer, said sponge mat layer comprising a polymeric foam containing a plurality of projections which extend from the surface of the sponge mat layer and prevent any malfunction in the blood circulation of the body, and said slider layer comprising a fibrous material which is capable of shifting in a lateral direction when a lateral force is applied to the sponge mat layer.
Claims17
A therapeutic seat cushion for use with a chair which comprises:
- a sponge mat layer comprising a polymeric foam including first and second surfaces;
- said first surface contains a plurality of projections which extend from the first surface of the sponge mat layer;
- said second surface being substantially flat;
- and
- a slider layer comprising a fibrous material positioned adjacent to the substantially flat second surface and being readily shiftable relative to said sponge mat layer;
- whereby when a force is applied to said seat cushion by a person positioned on said seat cushion, the relative positioning of the person and the sponge mat layer remains substantially constant relative to each other but shiftable relative to the slider layer thereby facilitating ready and comfortable movement of said person disposed on said seat cushion.
3 more elements
A wheeled chair provided with a therapeutic seat cushion which comprises:
- a sponge mat layer comprising a polymeric foam including first and second surfaces;
- said first surface contains a plurality of projections which extend from the first surface of the sponge mat layer;
- said second surface being substantially flat;
- and
- a slider layer comprising a fibrous material positioned adjacent to the substantially flat second surface and being readily shiftable relative to said sponge mat layer;
- whereby when a lateral force is applied to said seat cushion by a person positioned on said seat cushion, the relative positioning of the person and the sponge mat layer remains substantially constant relative to each other but shiftable relative to the slider layer thereby facilitating ready and comfortable movement of said person disposed on said seat cushion.
3 more elements
Dependencies are inferred from the claim text.