Personal air filtration apparatus and method
US10159857B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Mar 2, 2016 |
| Grant date | Dec 25, 2018 |
| Priority date | — |
| Expiry date | Jun 24, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2210/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and methods for air filtration are disclosed. The apparatus includes a body and first and second replaceable filters. The body of the apparatus further contains an air-exchange assembly and a filter receiver attached to the air exchange assembly. The air-exchange assembly contains an exhaust tube with an open end and a closed end, two wings on opposite sides of the exhaust tube, and an intake check valve and an exhaust check valve inside the exhaust tube. The first replaceable filter surrounds the filter receiver; and the second replaceable filter is inside the filter receiver. Several apertures and the check valves are strategically disposed in the exhaust tube to achieve optimal air filtration and avoid contamination of a user's exhaust.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.