Respirator filter canister
US8262782B2 · kind B2 · utility
5Cited by
13References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 2007 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Jul 1, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/1225
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A gas mask filter canister of varying shapes is filled by orienting the a fill opening to face upwardly, introducing into the fill opening a particulate filter material, and vibrating the filter canister at a frequency and amplitude, and for a time until a predetermined packing density is reached. The invention can be used to fill elliptical or other odd shaped filter canisters having a concave profiles to conform closely to the curvature of the wearer's face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.