Patent US4835033A successfully refreshed from Google Patents.
US4835033A
Expired / Lapsed
US
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Armor plate having triangular holes
Assignee: General Dynamics Land Systems Inc
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Filing: 1988-03-01
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Granted: 1989-05-30
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Expires: 2008-03-01
Abstract
Abstract Armor plate (10) is disclosed as including at least one hardened steel plate (14,18) having triangular holes (16,20) arranged in a repeating pattern. Webs (40,42 and 44,46) are located between the triangular holes to provide lightweight armor without any ballistic gaps. The triangular holes (16,20) are shaped and positioned with respect to each other such that the webs (40,42 and 44,46) are generally straight. Each steel plate disclosed has its associated triangular hole (16,20) provided with the same size and shape as each other which are preferably in the shape of equilateral triangles.
Inventors
- 👤 Richard A. Auyer
- 👤 Robert J. Buccellato
- 👤 Ernest N. Petrick
- 👤 Needangalam S. Sridharan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:37
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/023; E; E05; E05G; E05G1/00; E05G1/02; E05G1/024; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
157 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including triangular holes of the same shape arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having webs between the triangular holes to provide lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 2
Dependent Claim
157 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including triangular holes of the same shape arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having webs between the triangular holes to provide lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 3
Dependent Claim
30 words
Armor plate as in claim 1 wherein the triangular holes of the repeating pattern are shaped and positioned with respect to each other such that the webs are generally straight.
Claim 4
Dependent Claim
19 words
Armor plate as in claim 1 or 2 wherein the triangular holes have the same size as each other.
Claim 5
Dependent Claim
21 words
Armor plate as in claim 1 or 2 wherein the triangular holes of the repeating pattern are shaped as equilateral triangles.
Claim 6
Dependent Claim
22 words
Armor plate as in claim 4 wherein the steel plate further includes round mounting holes interrupting the repeating pattern of triangular holes.
Claim 7
Dependent Claim
30 words
Armor plate as in claim 1 or 2 wherein the triangular holes are formed in the repeating pattern in the steel plate before hardening thereof by a heat treating operation.
Claim 8
Dependent Claim
161 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including triangular holes of the same shape and size arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the triangular holes to prevent lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 9
Dependent Claim
161 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including triangular holes of the same shape and size arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the triangular holes to prevent lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 10
Dependent Claim
164 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including holes that are shaped as equilateral triangles and arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the equilateral triangular holes to provide lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having a surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having a surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 11
Dependent Claim
164 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including holes that are shaped as equilateral triangles and arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the equilateral triangular holes to provide lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having a surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having a surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 12
Dependent Claim
173 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including holes that are shaped as equilateral triangles of the same size as each other; said equilateral triangular holes being arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the equilateral triangular holes to provide lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 13
Dependent Claim
173 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including holes that are shaped as equilateral triangles of the same size as each other; said equilateral triangular holes being arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the equilateral triangular holes to provide lightweight armor plate without ballistic gaps; and said hardened steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 14
Dependent Claim
181 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including punched holes that are shaped as equilateral triangles of the same size as each other; said equilateral triangular holes being arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the triangular holes to provide lightweight armor plate without ballistic gaps; the hardened steel plate including round mounting holes; and said hardening steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
Claim 15
Dependent Claim
181 words
Armor plate comprising: a hardened steel plate having oppositely facing planar surfaces and including punched holes that are shaped as equilateral triangles of the same size as each other; said equilateral triangular holes being arranged in a repeating pattern of rows and columns; the triangular holes of each row being alternately rotated 180° with respect to each other and the triangular holes of each column having the same orientation as each other; the hardened steel plate having generally straight webs between the triangular holes to provide lightweight armor plate without ballistic gaps; the hardened steel plate including round mounting holes; and said hardening steel plate being selected from the group consisting of: (a) rolled homogenous armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 50 on the Rockwell C scale; or (b) high hard armor having surface hardness of at least 66 on the Rockwell C scale and having a ductile core with a hardness no greater than about 54 on the Rockwell C scale.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |