Patent ID: 8429900

Claim:
A motor vehicle-mounted container for storing a urea-water solution, comprising: a container having an interior space into which liquid is fed, wherein said container is provided with an upwardly disposed wall for a liquid tight closure of said interior space; a filling device for feeding liquid into said interior space; a withdrawal device for removing liquid from said interior space, wherein a free space is provided between a maximum liquid level at a maximum filling state in said interior space of said container, and an inner side of said upwardly disposed wall, wherein said free space corresponds to an increase in volume of a liquid that has frozen in said interior space; a heating means integrated into at least one of a base of the container and into a lateral wall of the container, such that said heating means is completely embedded in and surrounded by at least one of a material of the base and a material of the lateral wall of the container; insulation material on an outer side of the container, said insulation material having heating means integrated therein, whereby said insulation material and said integrated heating means form a structural unit disposed only on an outer side of the base of the container; and a pressure equalizing device comprising a line and at least one connector, said at least one connector disposed in at least one of a base of the container and into a lateral wall of the container, wherein said at least one connector does not project into the interior space of the container, and wherein the line is mounted within at least one of a base of the container, a lateral wall of the container, or the insulation material or externally to said container, wherein said pressure equalizing device is configured to operate between the base of the container and said upwardly disposed container wall, wherein said pressure equalizing device is configured to become active if the contents of the container are partially or entirely frozen and to provide an equalization between pressure in a region of said container near said base thereof, and a pressure existing over said liquid level.