US4908877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballistic helmet body
Assignee: Gentex Corp
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Filing: 1988-01-21
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Granted: 1990-03-20
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Expires: 2008-01-21
Abstract
Abstract A ballistic helmet body made up of a plurality of plies formed from flat hexagonal blanks of ballistic fabric. Before being formed to the shape of the helmet body each blank is slit along lines extending from spaced points around the periphery thereof toward the center to form a generally circular central area and a plurality of contiguous segments extending outwardly from the central area. When the blanks are formed to the shape of the helmet body, adjacent segments overlap over first portions to leave second portions which do not overlap. As successive plies are laid up they are relatively oriented so that second portions of one ply are covered by first portions of another ply.
Inventors
- 👤 Milton R. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:24
CPC Classifications
A; A42; A42B; A42B3/00; A42B3/04; A42B3/06; A42B3/062; A42B3/063; A42C; A42C2/00; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C70/228; B29C70/28; B29C70/30; B29C70/34; B29C70/345; F; F41; F41H; F41H1/00; F41H1/04; F41H1/08; B29C2793/00; B29C2793/0081; B29L; B29L2031/00; B29L2031/48; B29L2031/4807; B29L2031/4814; B29L2031/4821; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0524; Y10T83/0538; Y10T83/0548; Y10T83/0558
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
142 words
A ballistic helmet body including in combination a plurality of plies of ballistic material, each of said plies being formed from a flat hexagonal blank of ballistic fabric having slits extending from spaced locations around the periphery thereof toward the center to form a central generally circular area and a plurality of contiguous segments extending from said central area, the edges of adjacent segments of said blanks abutting along said slits, adjacent segments of each of said plies overlapping to provide each ply with first portions which overlap and with second portions which do not overlap, successive plies being oriented relative to each other so that second portions of one ply are covered by first portions of another ply, said plurality of plies including a number of plies which decrease in size from the outer surface toward the inside of said body.
Claim 2
Dependent Claim
142 words
A ballistic helmet body including in combination a plurality of plies of ballistic material, each of said plies being formed from a flat hexagonal blank of ballistic fabric having slits extending from spaced locations around the periphery thereof toward the center to form a central generally circular area and a plurality of contiguous segments extending from said central area, the edges of adjacent segments of said blanks abutting along said slits, adjacent segments of each of said plies overlapping to provide each ply with first portions which overlap and with second portions which do not overlap, successive plies being oriented relative to each other so that second portions of one ply are covered by first portions of another ply, said plurality of plies including a number of plies which decrease in size from the outer surface toward the inside of said body.
Claim 3
Dependent Claim
172 words
A ballistic helmet body including in combination a plurality of plies of ballistic material, each of said plies being formed from a flat hexagonal blank of ballistic fabric having slits extending from spaced locations around the periphery thereof toward the center to form a central generally circular area and a plurality of contiguous segments extending from said central area, the edges of adjacent segments of said blanks abutting along said slits, adjacent segments of each of said plies overlapping to provide each ply with first portions which overlap and with second portions which do not overlap, successive plies being oriented relative to each other so that second portions of one ply are covered by first portions of another ply, said plurality of plies including a number of first relatively large plies and a number of second relatively small plies, each of said second plies being sandwiched between a pair of first plies, said number of second plies including plies which decrease in size from the outside to the inside of said body.
Claim 4
Dependent Claim
172 words
A ballistic helmet body including in combination a plurality of plies of ballistic material, each of said plies being formed from a flat hexagonal blank of ballistic fabric having slits extending from spaced locations around the periphery thereof toward the center to form a central generally circular area and a plurality of contiguous segments extending from said central area, the edges of adjacent segments of said blanks abutting along said slits, adjacent segments of each of said plies overlapping to provide each ply with first portions which overlap and with second portions which do not overlap, successive plies being oriented relative to each other so that second portions of one ply are covered by first portions of another ply, said plurality of plies including a number of first relatively large plies and a number of second relatively small plies, each of said second plies being sandwiched between a pair of first plies, said number of second plies including plies which decrease in size from the outside to the inside of said body.
Claim 5
Dependent Claim
25 words
A ballistic helmet as in claim 2 in which the portions of one ply are staggered with relation to the portions of an adjacent ply.
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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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |