US4035846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable pressure compensated helmet stabilization system
Assignee: United States Department of the Navy
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Filing: 1976-08-17
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Granted: 1977-07-19
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Expires: 1996-08-17
Abstract
Abstract An inflatable stabilization system located within a rigid helmet shell. Theystem is constructed of an inflatable bladder having a manifold located in the nape area of the helmet with four curved ducts branching off to extend forwardly over the occipital and crown areas of the wearer. The bladder is attached to the helmet shell by hook and pile fastener strips. A pressure difference sensor controls bladder pressure to maintain a desired pressure difference between the bladder and ambient pressure. When a cloth hat or liner is used with the helmet, the bladder is located between the hat and the helmet shell.
Inventors
- 👤 Craig S. Jencks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:21
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/121; A42B3/122
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A helmet stabilization system, comprising: a helmet shell; a chin strap secured at each end to said shell for pressing the head of the wearer in said shell; an inflatable member disposed within said shell for opposing the forces imposed on the head of the wearer by said chin strap; a first plurality of fasteners releasably fastening said member to within said shell; a source of pressurized fluid; and pressure compensating valve means operatively connected between said source and said member for passing the pressurized fluid therethrough according to the variation from a preset value of the pressure difference between that of said member and the ambient pressure.
Claim 2
Dependent Claim
108 words
A helmet stabilization system, comprising: a helmet shell; a chin strap secured at each end to said shell for pressing the head of the wearer in said shell; an inflatable member disposed within said shell for opposing the forces imposed on the head of the wearer by said chin strap; a first plurality of fasteners releasably fastening said member to within said shell; a source of pressurized fluid; and pressure compensating valve means operatively connected between said source and said member for passing the pressurized fluid therethrough according to the variation from a preset value of the pressure difference between that of said member and the ambient pressure.
Claim 3
Dependent Claim
91 words
A helmet stabilization system, comprising: a helmet shell; an inflatable member disposed within said shell; a suspension disposed adjacent to said member; a first plurality of fasteners releasably fastening said member to said shell; a second plurality of fasteners releasably fastening said suspension to said shell; a source of pressurized fluid; and pressure compensating valve means operatively connected between said source and said member for passing the pressurized fluid therethrough according to the variation from a preset value of the pressure difference between that of said member and the ambient pressure.
Claim 4
Dependent Claim
91 words
A helmet stabilization system, comprising: a helmet shell; an inflatable member disposed within said shell; a suspension disposed adjacent to said member; a first plurality of fasteners releasably fastening said member to said shell; a second plurality of fasteners releasably fastening said suspension to said shell; a source of pressurized fluid; and pressure compensating valve means operatively connected between said source and said member for passing the pressurized fluid therethrough according to the variation from a preset value of the pressure difference between that of said member and the ambient pressure.
Claim 5
Dependent Claim
37 words
A helmet, comprising: a helmet shell; an inflatable member disposed within said shell; and pressure compensating means connected to said member for maintaining a constant pressure difference between the pressure within said member and the ambient pressure.
Claim 6
Dependent Claim
37 words
A helmet, comprising: a helmet shell; an inflatable member disposed within said shell; and pressure compensating means connected to said member for maintaining a constant pressure difference between the pressure within said member and the ambient pressure.
Claim 7
Dependent Claim
64 words
A helmet as defined in claim 3 wherein said pressure compensating means comprises: a first valve formed to receive pressurized fluid and connected to said member; and pressure difference sensing means connected to said first valve for operating said first valve according to the variation from a first preset value of the pressure difference between the pressure within said member and the ambient pressure.
Claim 8
Dependent Claim
41 words
A helmet as defined in claim 4 wherein said pressure compensating means further comprises: pressure relief valve means connected to said member for maintaining the difference between the pressure within said member and the ambient pressure below a second preset value.
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) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |