Abstract: A seat includes a seat portion connected to a base so that it can be supported on the ground. In addition to a front, a rear and two sides, the seat portion has an upwardly inclined portion, an inclined support portion, and a substantially flat horizontal portion. The upwardly inclined portion inclines upwardly from the front of the seat portion to a first intermediate position between the front and rear of the seat portion. The inclined support portion extends between a second intermediate position and the rear of the seat portion. The horizontal portion extends from the first intermediate position to the second intermediate position. The upwardly inclined portion supports the femurs and knees in a position below a person's acetabulum. The horizontal portion receives and holds the ischial bones when the person sits down, and the inclined support portion supports the gluteal muscles and sacra iliac ligaments.

Abstract: A seat member and a chair having the seat member. The seat member includes a forward supporting cushion and an adjacent rear supporting cushion. The rear supporting cushion has a high resistance to resilient deformation and the forward supporting cushion has a low resistance to resilient deformation, the resistance to resilient deformation of each cushion being relative to the other cushion. The cushions can be formed of polyurethane foam and mounted on a base member. An intermediate foam layer can be disposed between the cushions and the base member. A top layer can also be incorporated into the seat member. The top layer can include a layer of polyurethane foam and/or a layer of gel material. A seat member including a layer of gel material, such as a hydrogel or viscoelastic polyurethane gel in a protective outer layer is also described.

Abstract: A variable firmness motorcycle seat that includes a bottom plate, a cushion stuffing placed on the bottom plate and a seat skin that covers the cushion stuffing and is secured to the bottom plate. In order to improve sitting comfort, a portion with a greater firmness than surrounding portions is incorporated into the seat so as to provide riding comfort and prevent permanent seat deformation problems. The location of the greater firmness portion corresponds to the area where seat pressure produced by a rider is greatest.

Abstract: A foam cushion suitable for use such as with a wheelchair provides a combination of general pressure relief and positioning control over legs of a patient possibly otherwise having reduced or impaired motor control skills. A desired leg position is achieved by separating the legs and supporting them in a generally parallel position. Two base pieces have predetermined upper profiles and are glued to an upper support element having integrated cubic elements for pressure relief. Channels between adjacent cubic elements facilitate flexure of the upper element to conform to the contours of the two base pieces. Relatively high ILD foam characteristics and relatively high foam densities combined with the subject structure give good results for support and for product life, including compression fatigue considerations.

Abstract: The invention relates to a seat, particularly a vehicle seat, having a cushion support and a cushion which is supported on the cushion support. The cushion has a seat surface and an edge area surrounding this surface and is composed of a cubical cushion body which encompasses the seat surface and of a foamed-to-shape edge part which rests on the lateral surfaces of the cushion body and fills the edge area. This provides optimal seat pressure distribution and the air-conditioned sitting comfort, while reducing the required proportion of manual work. The cushion support, which accommodates the cushion body as well as the edge part, is constructed in an air-permeable manner and the other hand, the cushion body consists of an air-permeable nonwoven material, while the edge part is manufactured of polyurethane foam or another material having the same characteristics, and is connected with cushion body.

Abstract: A seat having various hardnesses provided with a surface material. The seat is air-permeable, has a tactile feeling of the seat surface and has a hardness capable of supporting the weight of a person who sits thereon. The seat (1) is covered with an air-permeable surface material (2) and has a foamed body having a shape generally corresponding to an external shape of the seat. The foamed body includes a first foamed body (10) as a base of the foamed body and a second foamed body (6) connected integrally with the first foamed body. The first foamed body (10) has ascending parts (12, 13) which are formed on parts of a surface thereof. In the method for manufacturing the seat, the mixture (15) is introduced and layered on the first foamed body (10) and the surface material (2) is placed thereon.