USH883H
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective mask
Assignee: United States Department of the Army
•
Filing: 1990-01-16
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Granted: 1991-02-05
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Expires: 2010-01-16
Abstract
Abstract A protective mask is provided, which contains the eyes, nose and mouth, crising a protruding lens so as to provide increased peripheral vision and preferably a nose cup which is shaped to provide a channel for passing defogging air to the lens, and peripheral areas of the mask which fold inward to form the seal.
Inventors
- 👤 Malcolm E. Little
- 👤 Robert P. Wagner
- 👤 William W. McCullough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:27
CPC Classifications
A; A62; A62B; A62B18/00; A62B18/08; A62B18/082; A62B18/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
42 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, and voice transmission wherein the lens protrude so as to provide increased peripheral vision.
Claim 2
Dependent Claim
42 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, and voice transmission wherein the lens protrude so as to provide increased peripheral vision.
Claim 3
Dependent Claim
21 words
The mask of claim 1 wherein said mask is fitted with detachable prescription lens mounted on the inside of the mask.
Claim 4
Dependent Claim
23 words
The mask of claim 1 wherein said mask is fitted with lens having an inside surface with a spherical radius of 41.165 mm.
Claim 5
Dependent Claim
23 words
The mask of claim 1 wherein said mask is fitted with lens having an outside surface with a spherical radius of 42.4 mm.
Claim 6
Dependent Claim
19 words
The mask of claim 1 wherein said mask is fitted with lens variable in thickness over the entire surface.
Claim 7
Dependent Claim
24 words
The mask of claim 1 wherein said mask is fitted with lens having a thickness at the optical center of about 0.118" (3 mm).
Claim 8
Dependent Claim
19 words
The mask of claim 1 wherein said mask is fitted with a primary lens mounted by a crimp ring.
Claim 9
Dependent Claim
19 words
The mask of claim 1 wherein the lens area is contoured in the inside to position detachable corrective lenses.
Claim 10
Dependent Claim
43 words
The mask of claim 1 wherein optimum field-of-view, optical compatibility, and stereoacuity are obtained by combining a high radius of about 42 mm spherical radius surface with a cylindrical flange of about 55 mm radius used for clamping the lens to the mask.
Claim 11
Dependent Claim
26 words
The mask of claim 1 wherein lens are mounted with the optical centers at about 64 mm apart and about 20 mm from the exit pupil.
Claim 12
Dependent Claim
36 words
The mask of claim 1 wherein the elastomer around the lens is sufficiently resilient so as to permit the lens to move relatively easily in all directions to provide easy optical center adjustment and enhanced compatibility.
Claim 13
Dependent Claim
51 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, voice transmission, and wherein a nose cup is provided which is shaped to provide a channel to pass defogging air to the lens.
Claim 14
Dependent Claim
51 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, voice transmission, and wherein a nose cup is provided which is shaped to provide a channel to pass defogging air to the lens.
Claim 15
Dependent Claim
38 words
The mask of claim 12 wherein the nose cup is fitted with one or more exit valves to move air from the lens area, and direct it to the mouth cavity of a wearer for inhalation and exhalation.
Claim 16
Dependent Claim
43 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, voice transmission, and wherein peripheral areas of the mask fold inward to form the seal.
Claim 17
Dependent Claim
43 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, voice transmission, and wherein peripheral areas of the mask fold inward to form the seal.
Claim 18
Dependent Claim
21 words
The mask of claim 14 wherein the peripheral area of the mask around the chin is formed into a chin rest.
Claim 19
Dependent Claim
63 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, voice transmission, and wherein a nose cup is provided which is shaped to provide a channel to pass defogging air to the lens, and peripheral areas of the mask fold inward to form the seal.
Claim 20
Dependent Claim
63 words
A protective mask comprising: an elastomeric face piece designed to enclose the eyes, nose and mouth of a wearer, a plurality of openings for lens, inhalation filter, exhalation, voice transmission, and wherein a nose cup is provided which is shaped to provide a channel to pass defogging air to the lens, and peripheral areas of the mask fold inward to form the seal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |