US Patent No. 10,034,808

LOW-AIR-LOSS (LAL) PATIENT SUPPORT APPARATUSES AND METHODS


Patent No. 10,034,808
Issue Date July 31, 2018
Title Low-air-loss (lal) Patient Support Apparatuses And Methods
Inventorship John H. Vrzalik, San Antonio, TX (US)
Bruce Phillips, San Antonio, TX (US)
Kz Hong, San Antonio, TX (US)
Assignee Huntleigh Technology Limited, (GB)

Claim of US Patent No. 10,034,808

1. A mattress for a patient-support apparatus, the mattress comprising:a mattress body comprising an air-impermeable material defining an upper side, a lower side, and two or more inflatable zones, wherein the upper side includes a plurality of openings configured to permit air to escape through the air-impermeable material from the at least two or more inflatable zones, wherein the at least two or more inflatable zones include a first inflatable zone in which a first portion of the plurality of openings are disposed in a first configuration and a second inflatable zone in which a second portion of the plurality of openings are disposed in a second configuration that is different from the first configuration; and
a cover sheet comprising an air-permeable, liquid-impermeable material covering one or more of the openings in the first inflatable zone and in the second inflatable zone, wherein the cover sheet comprises two or more layers, wherein the cover sheet is coupled to the mattress body by a liquid-impermeable welded seam between the cover sheet and the mattress body and the liquid-impermeable welded seam encircles the covered openings; wherein the mattress is configured to couple to a fluid source to provide air to the mattress at a rate sufficient to maintain inflation of the two or more inflatable zones as air escapes through the plurality of openings.