US4619003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated helmet
Assignee: BELL HELMETS Inc NORWALK CA A CA CORP
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Filing: 1985-11-25
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Granted: 1986-10-28
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Expires: 2005-11-25
Abstract
Abstract A heat resistant helmet composite comprises: (a) an outer dome-shaped shell, (b) an inner liner received in the shell, the liner having an outer dome shaped surface to fit in the shell, and (c) a metal foil sheet extending between the shell and the liner and extending over and adjacent the dome-shaped surface of the liner. Typically, the foil sheet is gathered throughout its major extent, to provide multiple locally overlapping layers of foil that increase the heat transfer resistance between the shell and liner.
Inventors
- 👤 Robert L. Asbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:30
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/10; A42B3/12; A42B3/28; A42B3/285; A42C; A42C5/00; A42C5/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
84 words
In a heat resistant helmet composite, the combination comprising (a) an outer dome-shaped shell, (b) an inner liner received in the shell, the liner having an outer dome shaped surface to fit in the shell, and (c) a metal foil sheet extending between the shell and the liner and extending over and adjacent the dome-shaped surface of the liner, (d) the liner consisting of foamed plastic material, and being substantially thicker than the shell, the foil sheet loosely adherent to said liner outer surface.
Claim 2
Dependent Claim
84 words
In a heat resistant helmet composite, the combination comprising (a) an outer dome-shaped shell, (b) an inner liner received in the shell, the liner having an outer dome shaped surface to fit in the shell, and (c) a metal foil sheet extending between the shell and the liner and extending over and adjacent the dome-shaped surface of the liner, (d) the liner consisting of foamed plastic material, and being substantially thicker than the shell, the foil sheet loosely adherent to said liner outer surface.
Claim 3
Dependent Claim
14 words
The combination of claim 1 wherein said foamed plastic material consists of expanded polystyrene.
Claim 4
Dependent Claim
23 words
The combination of claim 1 wherein said shell consists of hard plastic material, and has an inner surface contacted by the foil sheet.
Claim 5
Dependent Claim
15 words
The combination of claim 3 wherein the shell plastic material consists of high temperature polycarbonate.
Claim 6
Dependent Claim
24 words
The combination of claim 1 wherein said outer liner has fore and aft brims, whereby the helmet has the shape of a fire helmet.
Claim 7
Dependent Claim
88 words
In a heat resistant helmet composite, the combination comprising (a) an outer dome-shaped shell, (b) an inner liner received in the shell, the liner having an outer dome shaped surface to fit in the shell, and (c) a metal foil sheet extending between the shell and the liner and extending over and adjacent the dome-shaped surface of the liner, (d) the foil sheet being gathered throughout its major extent, to provide multiple locally overlapping layers of foil that increase the heat transfer resistance between the shell and liner.
Claim 8
Dependent Claim
88 words
In a heat resistant helmet composite, the combination comprising (a) an outer dome-shaped shell, (b) an inner liner received in the shell, the liner having an outer dome shaped surface to fit in the shell, and (c) a metal foil sheet extending between the shell and the liner and extending over and adjacent the dome-shaped surface of the liner, (d) the foil sheet being gathered throughout its major extent, to provide multiple locally overlapping layers of foil that increase the heat transfer resistance between the shell and liner.
Claim 9
Dependent Claim
23 words
The combination of claim 6 wherein the gathered foil sheet has an edge portion adjacent a looping edge defined by the inner liner.
Claim 10
Dependent Claim
36 words
The combination of claim 7 including an inner dome-shaped shell received in the liner, said inner shell having a rim portion confining said foil sheet edge portion proximate the looping edge defined by the inner liner.
Claim 11
Dependent Claim
27 words
The combination of claim 8 wherein said outer shell defines a looping slot and said inner shell rim protion includes a looping flange receive in said slot.
Claim 12
Dependent Claim
15 words
The combination of claim 8 wherein said inner liner consists of stiff molded plastic material.
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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) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |