US6658671B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective helmet
Assignee: Mips AB
•
Filing: 1999-12-21
•
Granted: 2003-12-09
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Expires: 2019-12-21
Abstract
Abstract A protective helmet ( 1 ) has an outer shell ( 2 ) and an inner shell ( 3 ), the outer shell being displaceable relative to the inner shell by means of at last one sliding layer ( 4 ) arranged between the the outer shell and the inner shell. In the edge region of the helmet, the outer shell and the inner shell are interconnected by means of members ( 5 ), for absorbing energy on displacement of the outer shell on the inner shell. In this way, impact energy from an oblique impact against the helmet can be absorbed during displacement between the outer shell and the inner shell.
Inventors
- 👤 Hans von Holst
- 👤 Peter Halldin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:14
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/062; A42B3/063; A42B3/064; A42B3/10; A42B3/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
139 words
Protective helmet in which, between an outer shell ( 2 ) and an inner shell ( 3 ) arranged inside the latter, there is a sliding layer ( 4 ) for making possible displacement of the outer shell relative to the inner shell in the event of an oblique impact against the protective helmet, the protective helmet having connecting members ( 5 ), which interconnect the outer shell and the inner shell, characterized in that the outer shell ( 2 ) is of the hard type and is harder in the radial direction of the helmet than the inner shell ( 3 ), in that the connecting member ( 5 ) comprise of an energy absorbing connecting member ( 5 ) which is deformable, whereby impact energy is absorbed during displacement between the outer shell and the inner shell.
Claim 2
Dependent Claim
139 words
Protective helmet in which, between an outer shell ( 2 ) and an inner shell ( 3 ) arranged inside the latter, there is a sliding layer ( 4 ) for making possible displacement of the outer shell relative to the inner shell in the event of an oblique impact against the protective helmet, the protective helmet having connecting members ( 5 ), which interconnect the outer shell and the inner shell, characterized in that the outer shell ( 2 ) is of the hard type and is harder in the radial direction of the helmet than the inner shell ( 3 ), in that the connecting member ( 5 ) comprise of an energy absorbing connecting member ( 5 ) which is deformable, whereby impact energy is absorbed during displacement between the outer shell and the inner shell.
Claim 3
Dependent Claim
44 words
Protective helmet according to claim 1 , characterized in that the outer shell ( 2 ) and the inner shell ( 3 ) are connected to each other with at least one connecting member ( 5 ) at the edge portion of the helmet.
Claim 4
Dependent Claim
22 words
Protective helmet according to claim 1 , characterized in that the connecting member/members ( 5 ) comprise of deformable strips of plastic.
Claim 5
Dependent Claim
28 words
Protective helmet according to claim 1 , characterized in that the connecting member/members ( 5 ) is/are arranged against the outside of the outer shell ( 2 ).
Claim 6
Dependent Claim
38 words
Protective helmet according to claim 1 , characterized in that the outside ( 3 ″) of the inner shell ( 3 ) is made of a harder material than the rest of the inner shell ( 3 ′).
Claim 7
Dependent Claim
21 words
Protective helmet according to claim 1 , characterized in that the material in the sliding layer ( 4 ) is oil.
Claim 8
Dependent Claim
21 words
Protective helmet according to claim 1 , characterized in that the material in the sliding layer ( 4 ) is microspheres.
Claim 9
Dependent Claim
21 words
Protective helmet according to claim 1 , characterized in that the material in the sliding layer ( 4 ) is Teflon.
Claim 10
Dependent Claim
25 words
Protective helmet according to claim 1 , characterized in that the connecting member/members ( 5 ) is/are arranged in the outer shell ( 2 ).
Claim 11
Dependent Claim
25 words
Protective helmet according to claim 1 , characterized in that the connecting member/members ( 5 ) is/are arranged in the inner shell ( 3 ).
Claim 12
Dependent Claim
51 words
Protective helmet according to claim 1 , characterized in that the inner shell ( 3 ) is constructed from a harder outer layer ( 3 ″) and a softer inner layer ( 3 ′), where the connecting member/members ( 5 ) is/are attached in the harder outer layer ( 3 ″).
Claim 13
Dependent Claim
25 words
Protective helmet according to claim 1 , characterized in that the thickness of the sliding layer ( 4 ) is within the range 0.1-5 mm.
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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) | 2006-12-08 | 2007-06-09 | 2007-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-12-08 | 2011-06-09 | 2011-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-12-08 | 2015-06-09 | 2015-12-09 | $7700.00 | Window Closed / Lapsed |