Foldable protective head enclosure
Abstract
Abstract A PROTECTIVE HOOD FOR THE HEAD HAS A FRONT WINDOW FORMED FROM A SHEET OF FLEXIBLE PLASTIC PROVIDED WITH A CENTRAL OUTLET OPENING IN FRONT OF THE MOUTH AND INLET OPENINGS AT ECH SIDE OF THE CENTRAL OPENING. SECURED TO THE WINDOW IN AN OUTLET VALVE SURROUNDED BY A BREATHING TUBE THAT EXTENDS REARWARDLY FOR INSERTION IN THE MOUTH. EACH INLET OPENING IS CLOSED BY A FILTER, AND A COVER HAS AN UPRIGHT BODY SPACED BEHIND THE FILTERS AND VALVE AND ALSO HAS FORWARDLY EXTENDING WALLS SEALED TO THE INNER SURFACE OF THE WINDOW AROUND THE OPENINGS AS A GROUP. THIS COVER BODY IS PROVIDED WITH AN OPENING THROUGH WHICH THE BREATHING TUBE EXTENDS, AND THE TUBE HAS A LATERAL INLET OPENING BETWEEN THE COVER BODY AND THE WINDOW FOR ESTABLISHING COMMUNICATION BETWEEN THE INSIDE OF THE TUBE AND THE AIR DUCT FORMED BY THE COVER. AT OPPOSITE SIDES OF THE TUBE OPENING IN THE COVER IT HAS HINGED PORTIONS TO PERMIT THE COVER AND WINDOW TO BE FOLDED REARWARDLY ON OPPOSITE SIDES OF THE BREATHING TUBE WHEN NOT IN USE.
Inventors
- 👤 Harry W Austin
- 👤 John C Miller
- 👤 Rutherford B Snyder Jr
- 👤 John W Neidhart
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |