Seat cushion

A wheel chair cushion, comprising:

• a base layer formed of a foam material and having a bottom surface and an upper surface which slopes downwardly with respect to said bottom surface in a front to rear direction;
• an intermediate layer formed of a foam material and secured to the upper surface of said base layer, said intermediate layer having a front edge, a rear edge and two side edges with the rear and two side edges being essentially of the same height, a pair of laterally spaced recesses being formed in said intermediate layer between said two side edges and extending form the front edge toward the rear edge of said second layer;
• a top layer formed of a foam material and secured to the upper surface of said intermediate layer and extending into the recesses formed in said intermediate layer so as to define a pair of depression formed in an upper surface of said seat cushion;
• and
• said base layer being firmer than said top and intermediate layers.

A seat cushion, comprising:

• a first layer having a front edge, a rear edge, a bottom surface and an upper surface;
• a second layer having a front edge, a rear edge, a bottom surface and an upper surface with the bottom surface of said second layer supported by the upper surface of said first layer;
• a third layer having a front edge, a rear edge, a bottom surface and an upper surface with at least a portion of the bottom surface of said third layer supported by the upper surface of said second layer;
• said first, second and third layers being formed of a foam material, and said first layer being formed of a foam material which has different IFD values than said second layer and said second layer being formed of a foam material which has different IFD values than said third layer;
• said first, second and third layers begin dimensioned and arranged such that an upper surface of said seat cushion slopes downwardly in a direction from the front of said seat cushion to the rear of said seat cushion within a range of b 41/2 to 51/2 degrees;
• and
• said first, second and third layers being dimensioned and arranged such that the upper surface of said seat cushion defines a pair of depressions that each originate at the front edge of said seat cushion an extend rearwardly toward the rear edge of said cushion, said depressions being laterally spaced from one another between two side edges of said seat cushion and said second layer has a recesses formed therein which result in the formation of the depression in the uppers surface of said seat cushion, and said rearward most edge of said depressions is positioned less than half of the distance between the front edge and the rear edge of said seat cushion.

A seat cushion, comprising:

• a first layer having a front edge, a rear edge, a bottom surface and an upper surface;
• a second layer having a front edge, a rear edge, a bottom surface and an upper surface with the bottom surface of said second layer supported by the upper surface of said first layer;
• a third layer having a front edge, a rear edge, a bottom surface and an upper surface with at least a portion of the bottom surface of said third layer supported by the upper surface of said second layer;
• said first, second and third layers being formed of a foam material , and said first layer being formed of a foam material which has different IFD values than said second layer and said second layer being formed of a foam material which has different IFD values than said third layer;
• said first, second and third layers being dimensioned and arranged such that an upper surface of said seat cushion, slopes downwardly with resect to a bottom surface of said seat cushion in a direction from a front edge of said seat cushion, and said upper surface of said seat cushion slopes downwardly from a starting location at said front of said seat cushion edge to an ending location at a rear of said seat cushion edge so as to define a wedge shaped seat cushion;
• and
• said first, second and third layers begin dimensioned and arranged such that the upper surface of said seat cushion defines a pair of depressions that each originate at the front edge of said seat cushion and extend rearwardly toward the rear edge of said cushion, and wherein a rearward most edge of each of said depressions is positioned less than half the distance between the front edge and rear edge of said seat cushion, said depressions being laterally spaced from one another to opposite sides of an intermediate portion of the front edge of said seat cushion and between two side edges of said seat cushion.