Patent Application
20200060432
Apparatuses consistent with exemplary embodiments relate to chairs and cushions. More particularly, apparatuses and methods consistent with exemplary embodiments relate to seat cushions embedded or integrated into chairs.
One or more exemplary embodiments provide a contoured seat cushion. More particularly, one or more exemplary embodiments provide a seat cushion with a contour on a bottom side or a top side.
According to an aspect of an exemplary embodiment, a seat cushion is provided. a first cushion comprising a top side and a bottom side. The bottom side or the top side includes a contoured area, the contoured area having a convex or a concave shape.
The contoured area may include a backfill material configured to restore a flat or convex nominal surface, the backfill material having an effective elastic modulus that is less than an elastic modulus of the cushion.
The contoured area may be a second contoured area, and the top side may include the second contoured area, the second contoured area being a depression in the top side of the cushion or being a convex shape.
The first cushion may include a tapered edge or a fillet on a front edge of the top side of the cushion or a tapered edge or a fillet on a rear edge of the top side of the cushion.
The contoured area may be a first contoured area, the bottom side may be the first contoured area, and the first contoured area may have a concave shape.
The cushion may further include a support partially covering the first contoured area, and contoured in substantially a same contour as the first contoured area. The support may fully cover the first contoured area or fully cover the bottom side of the cushion. The support may be one or more from among a rubber, an elastomer, a polymer, a thermoplastic elastomer (TPE) or a silicone material.
The support may be at least ten times stiffer than the first cushion, have an elastic strain limit of greater than twenty percent, or a deflection that is less than 1/20th of a deflection of the cushion.
The cushion may include a second cushion including a second top side and a second bottom side and the contoured area may be a first contoured area, the bottom side may include the first contoured area, and the first contoured area may a concave shape. Moreover, the second top side may include a third contoured area, the third contoured area being a depression in the second top side of the second cushion, and the first cushion is stacked on top of the second cushion.
The first cushion may include two first cushions and the second cushion may include two second cushions. The two first cushions and the two second cushions may be stacked in an order of first cushion, second cushion, first cushion, and second cushion from top to bottom.
The first cushion may include a material including one or more from among foam, polymeric lattices, elastomeric lattices, polymeric honeycombs, and elastomeric honeycombs.
The first cushion maybe formed by a foam molding process and the contoured area may be backfilled with a fill material.
According to an aspect of another exemplary embodiment, a vehicle seat including the cushion of claim 1 is provided.
Other objects, advantages and novel features of the exemplary embodiments will become more apparent from the following detailed description of exemplary embodiments and the accompanying drawings.
The disclosed examples will hereinafter be described in conjunction with the following drawing figures, wherein like numerals denote like elements, and wherein:
A seat cushion will now be described in detail with reference to
It is also understood that where it is stated herein that a first element is “connected to,” “attached to,” “formed on,” or “disposed on” a second element, the first element may be connected directly to, formed directly on or disposed directly on the second element or there may be intervening elements between the first element and the second element, unless it is stated that a first element is “directly” connected to, attached to, formed on, or disposed on the second element. Throughout the disclosure, one or more of the elements disclosed may be combined into a single apparatus or into one or more apparatuses.
Seat cushions may be portable or may be integrated into seats to provide comfort to a seat occupant. The seat cushions may be molded into various forms and may protect an occupant of a seat from discomfort caused by rigid, structural and/or other elements in a seat. Generally, seat cushion inserts include flat surfaces. However, due to the various shapes and sizes of occupants, the non-uniform distribution of an occupant's weight against the seat cushion, and the differences in pressure sensitivity or tolerance of human body anatomical features, it is desirable to provide a seat cushion that compensates for high or low-pressure conditions on the seat cushion. Thus, contouring the cushion in highly pressure sensitive areas that experience a greater force from a seated occupant will provide a more comfortable seat for the occupant, decrease pressure on the occupant's body, and enable a more comfortable and durable seat for the occupant.
Referring to
According to an example, a seat cushion 110 includes a contour on the bottom side of the cushion 107. According to another example, a seat cushion 120 may include a contour on the bottom side and the top side of the cushion 109. According to yet another example, a cross section view of seat cushion 130 shows an example of tapers in the top front 111 and top rear 112 of the seat cushion 130. These tapers help relieve pressure on occupants that may be seated on the seat cushion. Further, legs 106 and 108 are shown to illustrate how the cushions would receive a person sitting on the cushion or in a chair containing the cushion.
The contoured seat cushions may be foam molded by shooting foam into a mold. Moreover, multi-layered seat cushions may be foam molded in separate layers that are shot sequentially or layers created by a single mold with inflatable inserts that are retracted after the foam has set. Alternatively, the layers can be foam molded separately and bonded after being molded.
Referring to
Referring to
In one example, the support 402 may extend so that supports substantially the entire bottom side of the cushion 401 as shown in illustration 410. In another example, the support 403 may extend so that supports substantially the entire contour while leaving the remaining B-side or bottom of the seat cushion 401 uncovered as shown in illustration 420. In yet another example, the support 404 may extend so that it partially covers the contour while leaving remaining part of the contour and the B-side or bottom of the cushion uncovered as shown in illustration 430.
The supports 402-404 may be contoured in substantially the same contour as the contoured area of seat cushion 401. The supports 402-404 may be made of TPE or a silicone material. According to an example, the supports 402-404 may be separately manufactured and then placed in the mold used for foam molding the cushion where foam may then be shot over the supports 402-404. Alternatively, the supports 402-404 may be bonded to the foam.
One or more exemplary embodiments have been described above with reference to the drawings. The exemplary embodiments described above should be considered in a descriptive sense only and not for purposes of limitation. Moreover, the exemplary embodiments may be modified without departing from the spirit and scope of the inventive concept, which is defined by the following claims.
