Surgical helmet
US5592936A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1995 |
| Grant date | Jan 14, 1997 |
| Priority date | — |
| Expiry date | Aug 28, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62B18/045
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
The disclosed air filtration system filters both entering and exiting air. A primary structural element of the air filtration system is the unitary helmet member, which fits over the user's head. The unitary helmet member includes both a front aperture near the user's forehead and a rear aperture near the upper rear portion of the user's head. The unitary helmet member is blow-molded and therefore simple in construction. An interior channel connects the front aperture to the rear aperture, and a fan located over the rear aperture circulates air between these two apertures. A hood filter and a face shield fit over the unitary helmet member. The hood filter filters air passing through the rear aperture, and further filters air passing through a rear portion of the hood filter. Only the single fan is needed to draw air into the hood filter and remove air from the hood filter. The fan is placed over the rear aperture, thus distributing weight on the upper rear portion of the user's head to reduce stress and fatigue of the user. A secondary filter for added performance may be placed under the hood filter or over the fan inlet surface. A middle aperture located on the unitary helmet memb…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.