Inflatable device with exhausting apertures which vary in density
US6558413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | May 30, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2007/0268
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An inflatable cover is constructed with a base sheet to which is attached an overlaying material sheet in order to form an inflatable structure. There is an opening to admit warmed air into the inflatable structure. A plurality of apertures open through the base sheet, into the inflatable structure for the purpose of exhausting warmed air therefrom, through the base sheet. The plurality of apertures vary in density toward an edge of the base sheet for the purpose of establishing various temperature profiles with respect to the inflatable cover. In a particular embodiment, the density of the apertures increases toward the edges of the base sheet, from the center of the inflatable cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.