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MULTIPLE HARDNESS VEHICLE SEAT

IP.com Disclosure Number: IPCOM000031279D
Publication Date: 2004-Sep-20
Document File: 3 page(s) / 37K

Publishing Venue

The IP.com Prior Art Database

Abstract

A seat cushion (including both a seat bottom cushion and a seat back cushion) including a center portion and a pair of side bolsters is provided. The seat cushion is configured to provide varying degrees of hardness. The bolsters have a hardness level different than (and preferably greater than) the hardness level of the center portion. The increased bolster hardness is provided by a coating that is locally applied only to the bolsters. A method of forming such a seat cushion includes the steps of applying a first material (e.g., an elastomer coating) to an area of a mold defining the bolsters, allowing the material to at least partially harden, applying a second material (e.g., a polyurethane foam) to the mold, allowing the second material to cure, and removing the finished seat cushion from the mold.

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MULTIPLE HARDNESS VEHICLE SEAT

Abstract

         A seat cushion (including both a seat bottom cushion and a seat back cushion) including a center portion and a pair of side bolsters is provided. The seat cushion is configured to provide varying degrees of hardness. The bolsters have a hardness level different than (and preferably greater than) the hardness level of the center portion. The increased bolster hardness is provided by a coating that is locally applied only to the bolsters. A method of forming such a seat cushion includes the steps of applying a first material (e.g., an elastomer coating) to an area of a mold defining the bolsters, allowing the material to at least partially harden, applying a second material (e.g., a polyurethane foam) to the mold, allowing the second material to cure, and removing the finished seat cushion from the mold.

Background

         Vehicle seat assemblies generally include a seat portion and a seat back portion. The seat portion and the seat back portion often comprise a seat cushion (e.g., padded member) that is at least partially covered by a trim cover. Seat cushions are often configured to include a center portion and a pair of side bolsters or raised portions. The center portion is configured to support the weight of a seat occupant, and provide comfort for the seat occupant. The side bolsters are configured to laterally support or otherwise stabilize the seat occupant in the center portion. Some seat cushions have a uniform hardness (i.e., the center portion has the same hardness as the side bolsters), but seat cushions in which the side bolsters have an hardness greater than the center portion are desirable since such configurations provide improved stability and/or support of the seat occupant. In addition, such configurations can provide for improved craftsmanship of a vehicle seat by hardening a portion of the seat wherein a cover material may be applied. Accordingly, there is currently a demand to provide seat cushions having increased bolster hardness requirements. Although many efforts have attempted to provide such seat cushions, previous efforts have not been able to provide the desired level of bolster hardness while maintaining the desired hardness level (typically a lower hardness level) at the non-bolster sections. In addition, previous efforts have not been able to provide seat cushions with increased

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bolster hardness levels while remaining both economically efficient and manufacturably simplistic.

Description

         Referring to FIGURE 5, a seat cushion member 10 is shown configured as a vehicle seat cushion and generally includes a first section, shown as center portion 12, and a pair of raised or enhanced sections, shown as bolsters 14, 16. Seat cushion member 10 may be a seat bottom cushion and/or a seat back cushion. Bolsters 14, 16 are positioned along each side of center portion 12 and are configured to stabilize and/or support a vehicle seat occupant. Cushion member 10 is confi...