# US 8,464,968 B2 · System for the spraying of spray liquid for aircraft windshield, and cockpit provided with such a spraying system

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- Number: US 8,464,968 B2
- Document ID: US8464968B2
- Status: Granted
- Kind: B2
- Application number: 11/763,168
- Filed: 2007-06-14
- Published: 2008-04-17
- Granted: 2013-06-18
- Earliest claimed: 2006-06-26
- Assignees: Airbus Operations GmbH
- Applicants: Amelie Le Louarn; Gilles Chene
- Inventors: Amelie Le Louarn; Gilles Chene
- Web page: https://patentgrep.com/patent/US8464968B2

## CPC

- B64C 1/1476: {Canopies; Windscreens or similar transparent elements}
- B60S 1/481: {the operation of at least part of the liquid supply being controlled by electric means (electrical washing liquid warming-up means B60S1/488)}
- B64C: AEROPLANES; HELICOPTERS
- B60S: SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

A system for spraying liquid (100) for a windshield (111) of an aircraft including a spray-liquid supply circuit (101), a pressurized-gas supply circuit (102) designed to purge the spray-liquid supply circuit, and at least one nozzle (114) disposed downstream from the circuits and designed to spray the spray liquid and pressurized gas on a windshield, characterized in that the system includes an auxiliary means of compression (107) ready to compress gas designed to circulate in the pressurized-gas supply circuit, the auxiliary means of compression being positioned near the nozzle. Also, an aircraft cockpit provided with at least such a spray system.

## Claims

### Claim 1

An aircraft comprising a cockpit having a windshield, and a system for applying spray liquid to the windshield, the system for applying spray liquid comprising:
a spray liquid supply circuit comprising:
a source of pressurized spray liquid;
at least one control valve for controlling a flow of the spray liquid; and
a first piping portion connecting the source of pressurized spray liquid and the at least one control valve;
a pressurized-gas supply circuit comprising:
a tap mounted on a gas container;
at least one check valve; and
an auxiliary compressor connected between the tap and the at least one check valve;
the system for applying spray liquid to an aircraft cockpit windshield further comprising:
a nozzle for applying the spray liquid to the aircraft cockpit windshield; and
a second piping portion connecting the at least one control valve, the at least one check valve, and the nozzle, wherein the pressurized-gas supply circuit delivers gas from the gas container to the second piping portion to purge the second piping portion and the nozzle.

### Claim 2 (depends on 1)

The aircraft of claim 1, wherein the auxiliary compressor is adapted for continuous operation.

### Claim 3 (depends on 1)

The aircraft of claim 1, wherein the tap of the pressurized-gas supply circuit is equipped with a filter.

### Claim 4 (depends on 1)

The aircraft of claim 1, wherein the at least one check valve is adapted to prevent a passage of spray liquid into the pressurized-gas supply circuit.

### Claim 5 (depends on 1)

The aircraft of claim 1, wherein the pressurized-gas supply circuit further comprises a recovery tank connected between the compressor and the at least one check valve, the recovery tank adapted to collect spray liquid flowing from the check valve into the pressurized-gas supply circuit.

### Claim 6 (depends on 1)

The aircraft of claim 1, wherein a pressure of gas flowing in the pressurized-gas supply circuit is lower than a pressure of the spray liquid flowing in the spray-liquid supply circuit.

### Claim 7

An aircraft cockpit having a floor, and aircraft cockpit windshield and a system for applying spray liquid to the aircraft cockpit windshield, the system for applying spray liquid to the aircraft cockpit windshield comprising:
a spray liquid supply circuit comprising:
a source of pressurized spray liquid;
at least one control valve for controlling a flow of the spray liquid; and
a first piping portion connecting the source of pressurized spray liquid an the at least one control valve;
a pressurized-gas supply circuit comprising:
a tap mounted on a gas container;
at least one check valve; and
an auxiliary compressor connected between the tap and the at least one check valve;
the system for applying spray liquid to an aircraft cockpit windshield further comprising:
a nozzle for applying the spray liquid to the aircraft cockpit windshield; and
a second piping portion connecting the at least one control valve, the at least one check valve, and the nozzle, wherein the pressurized-gas supply circuit delivers gas from the gas container to the second piping portion to purge the second piping portion and the nozzle.

### Claim 8 (depends on 7)

The aircraft cockpit according to claim 7, wherein the auxiliary compressor device is positioned beneath the floor of said cockpit.

### Claim 9 (depends on 7)

The aircraft cockpit according to claim 7, wherein the auxiliary compressor device is positioned in said cockpit.