Patent US4028739A successfully refreshed from Google Patents.
US4028739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated helmet with selected weight distribution
Assignee: United States Department of the Navy
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Filing: 1976-07-02
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Granted: 1977-06-14
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Expires: 1996-07-02
Abstract
Abstract An improved, lightweight helmet and visor assembly suitable for use in higherformance aircraft during flight and ejection, if necessary, of the pilot. A plurality of holes are formed in the forward area of the crown region of the helmet shell beneath a visor guard and along the side edges of the visor guard to relocate the center of gravity of the helmet, reduce the aerodynamic pressure of windblast during ejection, increase stability during high acceleration, increase ventilation and cooling, and increase comfort to the pilot while maintaining the structural integrity of the helmet.
Inventors
- 👤 Richard L. Bell
- 👤 Matthew J. Lamb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:40
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/18; A42B3/22; A42B3/228; A42B3/28; A62; A62B; A62B18/00; A62B18/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
87 words
A helmet comprising: a helmet shell having a plurality of holes in the frontal region thereof; first and second spacing means mounted on either side of the front of said helmet shell, each of said spacing means being provided with at least one aperture for permitting the flow of air therethrough; a visor guard mounted on said first and second spacing means and covering said plurality of holes; and a visor located at the front of said helmet and mounted on said first and second spacing means.
Claim 2
Dependent Claim
87 words
A helmet comprising: a helmet shell having a plurality of holes in the frontal region thereof; first and second spacing means mounted on either side of the front of said helmet shell, each of said spacing means being provided with at least one aperture for permitting the flow of air therethrough; a visor guard mounted on said first and second spacing means and covering said plurality of holes; and a visor located at the front of said helmet and mounted on said first and second spacing means.
Claim 3
Dependent Claim
18 words
A helmet as defined in claim 1 further comprising: a cloth hat suspension disposed inside said helmet shell.
Claim 4
Dependent Claim
20 words
A helmet as defined in claim 1 wherein said first and second spacing means comprise a pair of visor tracks.
Claim 5
Dependent Claim
13 words
A helmet as defined in claim 3 wherein said visor tracks are arcuate.
Claim 6
Dependent Claim
29 words
A helmet as defined in claim 1 wherein said helmet shell has in the frontal region thereof a plurality of holes offset and spaced with respect to each other.
Claim 7
Dependent Claim
74 words
A helmet comprising: a helmet shell having a plurality of holes restricted to within the forward area of the crown region thereof; a pair of visor tracks mounted on said helmet shell on either side of said forward area; a visor guard mounted on said helmet shell in fixed relation thereto and covering said plurality of holes; and a visor located at the front of said helmet and slidably mounted on said visor tracks.
Claim 8
Dependent Claim
74 words
A helmet comprising: a helmet shell having a plurality of holes restricted to within the forward area of the crown region thereof; a pair of visor tracks mounted on said helmet shell on either side of said forward area; a visor guard mounted on said helmet shell in fixed relation thereto and covering said plurality of holes; and a visor located at the front of said helmet and slidably mounted on said visor tracks.
Claim 9
Dependent Claim
18 words
A helmet as defined in claim 6 further comprising: a cloth hat suspension disposed inside said helmet shell.
Claim 10
Dependent Claim
29 words
A helmet as defined in claim 6 wherein said helmet shell has in the frontal region thereof a plurality of holes offset and spaced with respect to each other.
Claim 11
Dependent Claim
54 words
A helmet comprising: a helmet shell; a pair of visor tracks mounted on either side of the front of said helmet shell, each of said tracks being provided with at least one aperture permitting flow of air therethrough; and a visor located at the front of said helmet and mounted on said visor tracks.
Claim 12
Dependent Claim
54 words
A helmet comprising: a helmet shell; a pair of visor tracks mounted on either side of the front of said helmet shell, each of said tracks being provided with at least one aperture permitting flow of air therethrough; and a visor located at the front of said helmet and mounted on said visor tracks.
Claim 13
Dependent Claim
18 words
A helmet as defined in claim 9 further comprising: a cloth hat suspension disposed inside said helmet shell.
Claim 14
Dependent Claim
154 words
A helmet comprising: a helmet shell having a plurality of holes in the frontal region thereof; first and second spacing means mounted on either side of the front of said helmet shell, each of said spacing means being provided with at least one aperture for permitting the flow of air therethrough; a visor guard fixedly mounted on said first and second spacing means and covering said plurality of holes, and having a slot aligned parallel to said first and second spacing means and intermediate the ends of said visor guard; a visor configured to be insertable between said visor guard and said helmet shell slidably mounted on said first and second spacing means between a retracted position between said visor guard and said helmet shell, and an extended position below said visor guard; and locking means, slidable in said slot and fixedly mounted to said visor, for locking said visor in the position desired.
Claim 15
Dependent Claim
154 words
A helmet comprising: a helmet shell having a plurality of holes in the frontal region thereof; first and second spacing means mounted on either side of the front of said helmet shell, each of said spacing means being provided with at least one aperture for permitting the flow of air therethrough; a visor guard fixedly mounted on said first and second spacing means and covering said plurality of holes, and having a slot aligned parallel to said first and second spacing means and intermediate the ends of said visor guard; a visor configured to be insertable between said visor guard and said helmet shell slidably mounted on said first and second spacing means between a retracted position between said visor guard and said helmet shell, and an extended position below said visor guard; and locking means, slidable in said slot and fixedly mounted to said visor, for locking said visor in the position desired.
Claim 16
Dependent Claim
18 words
A helmet as defined in claim 11 further comprising: a cloth hat suspension disposed inside said helmet shell.
Claim 17
Dependent Claim
28 words
A helmet as defined in claim 11 wherein said helmet has in the frontal region thereof a plurality of holes offset and spaced with respect to each other.
Claim 18
Dependent Claim
20 words
A helmet as defined in claim 11 wherein said first and second spacing means comprise a pair of visor tracks.
Claim 19
Dependent Claim
13 words
A helmet as defined in claim 14 wherein said visor tracks are arcuate.
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) | 1980-06-13 | 1980-12-13 | 1981-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-13 | 1984-12-13 | 1985-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-13 | 1988-12-13 | 1989-06-14 | $7700.00 | Window Closed / Lapsed |