Patent ID: 8267113
Filing Date: 2012-09-18
Classification: B60K,F16K,Y10T

Abstract:
1. A safety valve for the venting circuit of a liquid tank, comprising: a chamber provided with a cover, which extends at least partly into the liquid tank and is connected via a venting aperture to the venting circuit; a float, which can slide vertically inside the chamber and close off the venting aperture in a high position; a wall which divides the chamber into a lower portion in which the float slides and an upper portion which connects with the venting circuit, the wall being a moveable wall and having the venting aperture, the moveable wall being configured to move upwards and away from the float so as to establish fluid communication between the lower portion and the upper portion through the venting aperture when a rising pressure in the liquid tank rises above a predetermined threshold, the moveable wall being non uniform and including a central portion and a peripheral portion, the central portion having a different structure and/or geometry than the peripheral portion, the central portion being an injection molded part made of a thermoplastic and the peripheral portion being a diaphragm made of an elastomer; and an aperture stop integral either with the moveable wall or with the cover and extending either upwards or downwards, respectively, in the upper portion of the chamber to position the central portion of the moveable wall away from the cover when the moveable wall is in a high position.