Nasal filter
US8347885B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 19, 2010 |
| Grant date | Jan 8, 2013 |
| Priority date | — |
| Expiry date | Jul 23, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2210/0618
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A nasal filter includes a main body, a cover, and a filtering medium. The main body has a hollow cylinder, a boss connected to a spherical member, a flange, and a plurality of internal guide vanes. The hollow cylinder has a front and a rear opening. A first threaded portion is formed on the outer surface at the front end portion of the hollow cylinder. A thru hole is formed on the cover and aligns correspondingly to the front opening of the hollow cylinder. A second threaded portion is formed on the inner surface of the cover for mating to the first threaded portion on the hollow cylinder. The filtering medium is held in between the cover and the hollow cylinder and covers the thru hole. A filter pad is further included to provide additional functions. Accordingly, the nasal filter offers air purification and doe not cover the mouth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.