US3685512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hood with improved air inlet
Assignee: Bullard Co
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Filing: 1970-09-08
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Granted: 1972-08-22
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Expires: 1990-09-08
Abstract
Abstract A head and face protective enclosure for use by those working in contaminated environments. An inlet fitting for admitting respiration air to the enclosure located at the rear of the enclosure. A rearward extending air inlet projection that has a bottom wall formed with an opening for the air inlet fitting. The opening is positioned inside of the edge of the bottom wall so that the fitting is protected by the walls of the air inlet projection from impact by falling objects.
Inventors
- 👤 Herbert A Raschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:15
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
In a head enclosure of the type including a rigid crown portion for overlying the head of a wearer, an outwardly flaring rigid flange around the lower region of the crown portion, and a rigid face and neck protecting portion surrounding the flange and depending substantially vertically therefrom, the improvement comprising means projecting rearwardly from said face and neck protecting portion for defining an air inlet to the head enclosure, said means including upper and lower horizontal spaced apart walls integral with and projecting generally perpendicularly from said face and neck protecting portion, said lower wall defining an air inlet opening therethrough, said opening being disposed sufficiently interior of the outer extremity of said lower wall to define a margin so that an air conduit can be connected in depending relation of said lower wall in communication with said opening and reside totally within the outer extremities of said walls.
Claim 2
Dependent Claim
150 words
In a head enclosure of the type including a rigid crown portion for overlying the head of a wearer, an outwardly flaring rigid flange around the lower region of the crown portion, and a rigid face and neck protecting portion surrounding the flange and depending substantially vertically therefrom, the improvement comprising means projecting rearwardly from said face and neck protecting portion for defining an air inlet to the head enclosure, said means including upper and lower horizontal spaced apart walls integral with and projecting generally perpendicularly from said face and neck protecting portion, said lower wall defining an air inlet opening therethrough, said opening being disposed sufficiently interior of the outer extremity of said lower wall to define a margin so that an air conduit can be connected in depending relation of said lower wall in communication with said opening and reside totally within the outer extremities of said walls.
Claim 3
Dependent Claim
36 words
A head enclosure according to claim 1 wherein said upper wall is disposed in vertical alignment with said outwardly flaring flange so that said upper wall projects smoothly in a discontinuity-free manner from said head enclosure.
Claim 4
Dependent Claim
56 words
A head enclosure according to claim 1 wherein said air inlet defining means is disposed rearwardly of the front-to-back mid-point of said enclosure, said air inlet defining means including a generally vertical sidewall extending between said upper and lower walls, the forward extremity of said side wall being tangent to said face and neck protecting portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |