Clean room helmet system
US4901716A · kind A · utility
76Cited by
9References
9Claims
0Family size
Inventors
Key dates
| Filing date | Feb 6, 1989 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Feb 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S128/15
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
There is described a portable and mobile clean room helmet system including a helmet having a removable face shield connected to a battery-powered filtering system for pulling air from within the helmet and exhausting filtered air to the outside environment. The removable face shield contains a plurality of unique flapper valves that allow air to enter the helmet system while at the same time preventing unfiltered air from leaving the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.