US6317895B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety helmet assembly
Assignee: MSA Technology LLC
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Filing: 1999-07-14
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Granted: 2001-11-20
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Expires: 2019-07-14
Abstract
Abstract A safety helmet having a rigid outer shell, a shock absorbing layer inside of the outer shell, and a shield layer fabricated from a strong and lightweight material positioned between the outer shell and the shock absorbing layer. The shield layer is preferably free to move relative to the outer shell in a direction toward the shock absorbing layer.
Inventors
- 👤 Richard A. Erth
- 👤 Layton A. Wise
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:51
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/10
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
64 words
A safety helmet assembly comprising: (a) a rigid outer shell; (b) an unsegmented shock absorbing layer inside of the outer shell (c) a nonflaccid shield layer comprising a plurality of individual sections positioned between the outer shell and the shock absorbing layer, the shield layer being fabricated from a polymeric material having a modulus in the range of approximately 150,000 to approximately 700,000 psi.
Claim 2
Dependent Claim
64 words
A safety helmet assembly comprising: (a) a rigid outer shell; (b) an unsegmented shock absorbing layer inside of the outer shell (c) a nonflaccid shield layer comprising a plurality of individual sections positioned between the outer shell and the shock absorbing layer, the shield layer being fabricated from a polymeric material having a modulus in the range of approximately 150,000 to approximately 700,000 psi.
Claim 3
Dependent Claim
28 words
The safety helmet assembly of claim 1 wherein the shield layer is free to move relative to the outer shell in a direction toward the shock absorbing layer.
Claim 4
Dependent Claim
25 words
The safety helmet assembly of claim 1 wherein the thickness of the shield layer is in the range of approximately 0.015 to approximately 0.040 mil.
Claim 5
Dependent Claim
25 words
The safety helmet assembly of claim 3 wherein the thickness of the shield layer is in the range of approximately 0.025 to approximately 0.035 mil.
Claim 6
Dependent Claim
22 words
The safety helmet assembly of claim 1 wherein the polymeric material has a notched impact strength greater than approximately 0.5 ft. lb./in.
Claim 7
Dependent Claim
13 words
The safety helmet assembly of claim 1 shield layer is fabricated from nylon.
Claim 8
Dependent Claim
16 words
The safety helmet assembly of claim 1 wherein the outer shell layer is fabricated from polyethylene.
Claim 9
Dependent Claim
23 words
The safety helmet assembly of claim 1 wherein the outer shell is fabricated from polyethylene and the shield layer is fabricated from nylon.
Claim 10
Dependent Claim
77 words
A safety helmet assembly comprising: (a) a suspension connected to a rigid outer shell; (b) a shock absorbing layer inside of the outer shell; and (c) a nonflaccid shield layer positioned between the outer shell and the shock absorbing layer, the shield layer comprises a plurality of individual sections with a first section positioned on a first side of the safety helmet assembly and a second section positioned on a second side of the safety helmet assembly.
Claim 11
Dependent Claim
77 words
A safety helmet assembly comprising: (a) a suspension connected to a rigid outer shell; (b) a shock absorbing layer inside of the outer shell; and (c) a nonflaccid shield layer positioned between the outer shell and the shock absorbing layer, the shield layer comprises a plurality of individual sections with a first section positioned on a first side of the safety helmet assembly and a second section positioned on a second side of the safety helmet assembly.
Claim 12
Dependent Claim
17 words
The safety helmet assembly of claim 9 wherein the first and second sections are opposite each other.
Claim 13
Dependent Claim
63 words
The safety helmet assembly of claim 9 wherein the suspension comprises straps connected at the ends thereof to the outer shell, each of the first section and the second section comprising a slot on each lateral end thereof, each of the slots cooperating with one of the straps to removably connect the first section and the second section to the safety helmet assembly.
Claim 14
Dependent Claim
31 words
The safety helmet assembly of claim 11 wherein the shield layer is fabricated from a polymeric material having a modulus in the range of approximately 150,000 to approximately to 700,000 psi.
Claim 15
Dependent Claim
25 words
The safety helmet assembly of claim 11 wherein the thickness of the shield layer is in the range of approximately 0.015 to approximately 0.040 mil.
Claim 16
Dependent Claim
25 words
The safety helmet assembly of claim 11 wherein the thickness of the shield layer is in the range of approximately 0.025 to approximately 0.035 mil.
Claim 17
Dependent Claim
21 words
The safety helmet assembly of claim 11 wherein the polymeric material has a notched impact strength greater than approximately 0.5 ft.lb./in.
Claim 18
Dependent Claim
23 words
The safety helmet assembly of claim 11 wherein the shield layer is fabricated from nylon and the outer shell is fabricated from polyethylene.
Claim 19
Dependent Claim
93 words
A safety helmet assembly comprising: (a) a suspension connected to a rigid outer shell; (b) a shock absorbing layer inside of the outer shell; and (c) a nonflaccid shield layer having a thickness in the range of approximately 0.015 to approximately 0.040 mil, positioned between the outer shell and the shock absorbing layer, the shield layer comprising a first section positioned on a first side of the safety helmet assembly and a second section positioned on a second side of the safety helmet assembly, the first and second sections being opposite each other.
Claim 20
Dependent Claim
93 words
A safety helmet assembly comprising: (a) a suspension connected to a rigid outer shell; (b) a shock absorbing layer inside of the outer shell; and (c) a nonflaccid shield layer having a thickness in the range of approximately 0.015 to approximately 0.040 mil, positioned between the outer shell and the shock absorbing layer, the shield layer comprising a first section positioned on a first side of the safety helmet assembly and a second section positioned on a second side of the safety helmet assembly, the first and second sections being opposite each other.
Claim 21
Dependent Claim
23 words
The safety helmet assembly of claim 17 wherein the shield layer is fabricated from nylon and the outer shell is fabricated from polyethylene.
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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) | 2004-11-19 | 2005-05-21 | 2005-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-19 | 2009-05-21 | 2009-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-19 | 2013-05-21 | 2013-11-20 | $7700.00 | Window Closed / Lapsed |