Face piece protection system
US6347401B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 15, 2001 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | May 15, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/029
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A thin protective sheet for covering a face plate on an air mask. This thin sheet can come in many forms. For example, in a first embodiment, the sheet comprises a substantially rectangular thin sheet of plastic having a first edge with two substantially circular cut outs, and a second oppositely spaced edge having two substantially square cut outs and a substantially semi-circular cut out. In addition, there are positioned normal to these two sheets, two parallel spaced substantially flat edges. In the second embodiment of the invention, the sheet is a substantially rectangular thin sheet of plastic having an edge having a series of curves. There is also a second oppositely spaced flat edge and two oppositely spaced substantially flat edges positioned normal to the first edge and the second edge. The third embodiment is oval shaped and is designed to fit around a mask as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.