Patent US3705558A successfully refreshed from Google Patents.
US3705558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armor
Assignee: Motors Liquidation Co
•
Filing: 1963-04-24
•
Granted: 1972-12-12
•
Expires: 1983-04-24
Abstract
Abstract 1. A lightweight armor plate comprising a mass of sintered hard substantially spherical ceramic balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, and means for rigidly supporting said balls in said pyramidal relationship.
Inventors
- 👤 John A Mcdougal
- 👤 Karl Schwartzwalder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:12
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0421; F41H5/0492; Y; Y10; Y10S; Y10S428/00; Y10S428/911; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
43 words
A lightweight armor plate comprising a mass of sintered hard substantially spherical ceramic balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, and means for rigidly supporting said balls in said pyramidal relationship.
Claim 2
Dependent Claim
43 words
A lightweight armor plate comprising a mass of sintered hard substantially spherical ceramic balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, and means for rigidly supporting said balls in said pyramidal relationship.
Claim 3
Dependent Claim
71 words
A lightweight armor plate comprising a layer of sintered hard substantially spherical ceramic balls arranged in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls which is adapted to fragmentize a projectile on impact therewith, said balls being rigidly supported in said pyramidal relationship, said layer being attached to a tough ductile energy absorbing backup layer adapted to prevent penetration by the projectile fragments.
Claim 4
Dependent Claim
71 words
A lightweight armor plate comprising a layer of sintered hard substantially spherical ceramic balls arranged in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls which is adapted to fragmentize a projectile on impact therewith, said balls being rigidly supported in said pyramidal relationship, said layer being attached to a tough ductile energy absorbing backup layer adapted to prevent penetration by the projectile fragments.
Claim 5
Dependent Claim
50 words
An integral lightweight armor plate comprising a rigid layer of sintered hard alumina adapted to fragmentize a projectile on impact therewith interposed between and bonded to a pair of aluminum layers, one of said aluminum layers being adapted to backup said alumina layer and prevent penetration by the projectile fragments.
Claim 6
Dependent Claim
50 words
An integral lightweight armor plate comprising a rigid layer of sintered hard alumina adapted to fragmentize a projectile on impact therewith interposed between and bonded to a pair of aluminum layers, one of said aluminum layers being adapted to backup said alumina layer and prevent penetration by the projectile fragments.
Claim 7
Dependent Claim
52 words
A lightweight armor plate comprising a mass of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, said balls being cast in a matrix of aluminum and backed up by a layer of aluminum of substantial thickness.
Claim 8
Dependent Claim
52 words
A lightweight armor plate comprising a mass of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, said balls being cast in a matrix of aluminum and backed up by a layer of aluminum of substantial thickness.
Claim 9
Dependent Claim
89 words
A lightweight armor plate comprising a mass of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each of said balls is in contact substantially with at leasT three other balls, means for rigidly supporting said balls in said pyramidal relationship, and a backup layer of a ductile energy absorbing material secured thereto, said alumina balls being operative on impact with a projectile to fragmentize the projectile and said backup layer being effective to absorb the energy of the projectile fragments and prevent their penetration thereof.
Claim 10
Dependent Claim
89 words
A lightweight armor plate comprising a mass of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each of said balls is in contact substantially with at leasT three other balls, means for rigidly supporting said balls in said pyramidal relationship, and a backup layer of a ductile energy absorbing material secured thereto, said alumina balls being operative on impact with a projectile to fragmentize the projectile and said backup layer being effective to absorb the energy of the projectile fragments and prevent their penetration thereof.
Claim 11
Dependent Claim
67 words
A lightweight armor plate comprising a frontal projectile fragmentizing mass including at least two layers of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, means enveloping said balls and rigidly supporting them in said pyramidal relationship, and a projectile fragment retaining backup layer of a ductile energy absorbing material secured thereto.
Claim 12
Dependent Claim
67 words
A lightweight armor plate comprising a frontal projectile fragmentizing mass including at least two layers of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, means enveloping said balls and rigidly supporting them in said pyramidal relationship, and a projectile fragment retaining backup layer of a ductile energy absorbing material secured thereto.
Claim 13
Dependent Claim
71 words
A lightweight armor plate comprising a frontal projectile fragmentizing mass including at least two layers of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, a metal coating over said balls supporting them in said pyramidal relationship, and a projectile retaining backup layer of a ductile energy absorbing material adhesively secured to said metal coated mass.
Claim 14
Dependent Claim
71 words
A lightweight armor plate comprising a frontal projectile fragmentizing mass including at least two layers of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, a metal coating over said balls supporting them in said pyramidal relationship, and a projectile retaining backup layer of a ductile energy absorbing material adhesively secured to said metal coated mass.
Claim 15
Dependent Claim
68 words
A lightweight armor plate comprising a frontal projectile fragmentizing mass including at least two layers of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, a matrix of tough synthetic resin material supporting said balls in said pyramidal relationship, and a projectile retaining backup layer of a ductile energy absorbing material secured thereto.
Claim 16
Dependent Claim
68 words
A lightweight armor plate comprising a frontal projectile fragmentizing mass including at least two layers of sintered hard substantially spherical alumina balls disposed in contacting pyramidal relationship whereby each ball is in contact substantially with at least three other balls, a matrix of tough synthetic resin material supporting said balls in said pyramidal relationship, and a projectile retaining backup layer of a ductile energy absorbing material secured thereto.
References Cited (Backward Citations)
DE365140C
Cited
GB190817224A
Cited
US952877A
Cited
US1463498A
Cited
CH227168A
Cited
US2738297A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |