# US 4,391,002 A · Water-closet for vehicles, particularly motor coaches

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- Number: US 4,391,002 A
- Document ID: US4391002A
- Status: Granted
- Kind: A
- Application number: 06/172,197
- Filed: 1980-11-13
- Granted: 1983-07-05
- Earliest claimed: 1979-07-26
- Assignees: Karl Kassbohrer Fahrzeugwerke GmbH
- Inventors: Ernst Marti
- Web page: https://patentgrep.com/patent/US4391002A

## CPC

- C02F 3/1242: {Small compact installations for use in homes, apartment blocks, hotels or the like}
- B60R 15/04: Toilet facilities {(in railway vehicles B61D35/005)}
- Y02W 10/10: Biological treatment of water, waste water, or sewage
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)
- B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- Y02W: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT

## Abstract

An aerating system for faecal matter collected in a container in a vehicle which includes a pressurized air system for operating brakes, doors, ventilation flaps and the like. The pressurized air system includes a tank and a compressor which operates continuously during operation of the vehicle engine and a regulator which exhausts excess air to a bypass duct when the tank is at its operating pressure. A tube connects the container to the bypass duct so that faecal matter in the container is substantially continuously aerated during vehicle engine operation.

## Claims

### Claim 1

In a water-closet for a vehicle including a completely closed sewage container for receiving faecal matter and sewage therein, said vehicle having a pressurized air supply system for operating brakes, doors, ventilation flaps and the like, said system including a compressor operable continuously during operation of the vehicle engine to supply pressurized air to a pressure tank, a pressure regulator for controlling the air pressure in the pressure tank, and a bypass duct connected to the regulator for exhausting excess air from the system when the pressure tank is at its operating pressure, the improvement comprising a tube extending into the container to a point close to the bottom of the container and connected to the bypass duct of the pressurized air supply system to continuously supply aerating air to said container during operation of the vehicle engine and when the pressure tank is at its operating pressure and to substantially continuously aerate faecal matter in said container during vehicle engine operation.

### Claim 2 (depends on 1)

The water-closet of claim 1, wherein the bypass duct is provided with a relief port for controllably reducing the air pressure supplied to the sewage container.

### Claim 3 (depends on 1)

The water closet of claim 1, which further includes a fan connected to said container by an intake duct and to the atmosphere by an exhaust duct for ventilating said container.

### Claim 4 (depends on 1)

The water-closet of claim 1 wherein said container is adapted to be heated by the cooling water of said vehicle engine.