Patent ID: 8166995
Filing Date: 2012-05-01
Classification: B60K,F16K,Y10T

Abstract:
1. A process for manufacturing a series of valves for a venting circuit of a liquid tank, these valves having variable ventilation adapted to different specifications and comprising: a) a chamber which comprises openings that allow liquid to penetrate into the chamber above a certain level in the tank and/or in the event of waves in the tank or the tank being turned upside down; b) a cover for the chamber comprising a main ventilation aperture that is susceptible to open into the venting circuit of the tank; and c) a float comprising a body and a needle capable of closing off the main ventilation aperture, said float being able to slide vertically inside the chamber depending on the level of liquid therein, wherein a needle is chosen that is frustoconical-shaped and based on an elastomeric material, wherein the chamber and float are kept the same whatever the specifications, and wherein only the cover, and the dimensions and/or the shape of the main ventilation aperture as a function of these specifications, are varied.