| US 7,507,468 B2 | ||
| Laminated visco-elastic support | ||
| Dag Landvik, Saltsjo-Duvnas (Sweden); and Michael B. Allaway, Paris (France) | ||
| Assigned to Tempur-Pedic Management, Inc., Lexington, Ky. (US) | ||
| Filed on Mar. 31, 2003, as Appl. No. 10/403,255. | ||
| Application 10/403255 is a continuation of application No. 09/703893, filed on Nov. 01, 2000, granted, now 6,541,094, filed on Apr. 01, 2003. | ||
| Application 09/703893 is a continuation of application No. 08/458968, filed on Jun. 02, 1995, granted, now 6,159,574, filed on Dec. 12, 2000. | ||
| Claims priority of application No. 9411120.0 (GB), filed on Mar. 06, 1994; and application No. 9411504.5 (GB), filed on Sep. 06, 1994. | ||
| Prior Publication US 2004/0033351 A1, Feb. 19, 2004 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. B32B 3/26 (2006.01) | ||
| U.S. Cl. 428—316.6 [428/71; 428/217; 428/319.3; 428/315.9; 442/221; 442/370] | 27 Claims |
| 1. A layered bed mattress for pressure-relief of a user, the bed mattress comprising:
a first foam layer having a generally planar first support surface adapted to substantially face the user resting upon the
bed mattress and having length and width dimensions sufficient to support a reclining body of an adult user, and a generally
planar second surface opposite the first support surface, the first and second surfaces defining therebetween a substantially
uniform undeflected thickness, the first foam layer comprising visco-elastic foam having a density of no less than 50 kg/m3 and no greater than 120 kg/m3; and
a second foam layer having a generally planar third surface adjacent and substantially facing the second surface of the first
foam layer, the second foam layer having a substantially uniform undeflected thickness greater than that of the first foam
layer.
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