# US 10,480,916 B1 · Low-observable projectile

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- Number: US 10,480,916 B1
- Document ID: US10480916B1
- Status: Granted
- Kind: B1
- Application number: 15/698,543
- Filed: 2017-09-07
- Granted: 2019-11-19
- Earliest claimed: 2017-09-07
- Applicants: Gregory Saltz
- Inventors: Gregory Saltz
- Web page: https://patentgrep.com/patent/US10480916B1

## CPC

- F42B 12/80: Coatings
- F42B 5/02: Cartridges, i.e. cases with charge and missile
- F42B 5/045: of telescopic type (F42B5/184 takes precedence)
- F42B 6/006: {Projectiles for electromagnetic or plasma guns}
- F42B 12/76: of the casing
- F42B 14/06: Sub-calibre projectiles having sabots; Sabots therefor
- F42B 14/064: {Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base}
- F42B 14/068: {Sabots characterised by the material (F42B14/067 takes precedence)}
- F42B 15/34: Protection against overheating or radiation, e.g. heat shields; Additional cooling arrangements {(thermal protection fitted in or to cosmonautic vehicles B64G1/58)}
- F42B 15/00: Self-propelled projectiles or missiles, e.g. rockets; Guided missiles (F42B10/00, F42B12/00, F42B14/00 take precedence; for practice or training F42B8/12; rocket torpedoes F42B17/00; marine torpedoes F42B19/00; cosmonautic vehicles B64G; jet-propulsion plants F02K)
- F42B: EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION (explosive compositions C06B; fuzes F42C; blasting F42D)

## Abstract

A radar-absorbing material projectile system including a projectile with an outer layer of radar-absorbing material (RAM). A carrier or armature is disposed around the projectile, protecting the layer of RAM during the firing sequence. In some embodiments the carrier is a discarding carrier which falls away after firing, rendering the projectile low-observable with regard to radar detection due to the layer of RAM.

## Claims

### Claim 1

A projectile system comprising:
a projectile including an exterior layer of radar-absorbing material fully covering an exterior surface of the projectile; and
a carrier disposed around the projectile configured to provide a thermally insulating barrier preventing any portion of the radar-absorbing layer being burned off during firing of the projectile system and configured to detach and fall away from the projectile after firing of the projectile system while leaving the layer of radar-absorbing material intact, whereby the projectile is low-observable for radar detection after firing.

### Claim 2 (depends on 1)

The projectile system of claim 1 further comprising a casing disposed around the carrier and configured to be held within a barrel prior to firing of the projectile.

### Claim 3 (depends on 1)

The projectile system of claim 1, wherein the radar-absorbing material is iron ball paint including microspheres, the iron ball paint applied to the surface of the projectile such that the iron ball paint is radar-absorbing.

### Claim 4 (depends on 3)

The projectile system of claim 3, wherein the iron ball paint has an inner first layer and an outer second layer.

### Claim 5 (depends on 4)

The projectile system of claim 4, wherein the first layer has a higher density of microspheres than the second layer.

### Claim 6 (depends on 1)

The projectile system of claim 1, wherein the projectile is non-powered.

### Claim 7 (depends on 6)

The projectile system of claim 6, wherein the projectile includes at least one flight control element.

### Claim 8 (depends on 1)

The projectile system of claim 1, wherein the carrier comprises a thermally insulative material.

### Claim 9 (depends on 8)

The projectile system of claim 8, wherein the thermally insulative material comprises at least one of manganese, polyurethane, polytetrafluoroethylene, and aerogel.

### Claim 10 (depends on 1)

The projectile system of claim 1, wherein the carrier comprises a metal alloy.

### Claim 11 (depends on 1)

The projectile system of claim 1, wherein the carrier is configured to include at least one low-observable characteristic.

### Claim 12 (depends on 1)

The projectile system of claim 1, wherein the carrier completely encases the projectile.

### Claim 13 (depends on 1)

The projectile system of claim 1, wherein the carrier partially encases the projectile.

### Claim 14 (depends on 1)

The projectile system of claim 1, wherein the carrier is a sabot-type discarding carrier.