Ostomy appliance
US6135986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1999 |
| Grant date | Oct 24, 2000 |
| Priority date | — |
| Expiry date | Oct 7, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F5/441
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ostomy appliance comprising a front wall and a rear wall of flexible material, the rear wall having an opening into the bag by which waste material can enter the bag and one of the walls has one or more vents through which gas may escape from the bag and having a filter covering said vent, said filter comprising an elongated, substantially flat filter body of a porous filter material interposed between gas and liquid impervious walls which are sealed to the body along its longitudinal side edges; gas inlet and outlet openings being provided in communication with the filter material adjacent to its respective longitudinal end regions, wherein both of the gas and liquid impervious walls are sealed to the upper end lower surfaces of the filter body, the arrangement being so that in use gas flows longitudinally through the filter from the inlet opening to the outlet opening, such gas flow being by a hydrophobic sheet, PA0 wherein the inlet opening is covered with a microporous oleophobic membrane and wherein a foam material is placed between the front wall and the rear wall and covering the inlet opening of the vent shows improved resistance against wetting and blocking of the filte…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.