| 摘要 |
A load limiting device (10) is described for a tank used for storing liquid fuels, of the type comprising a hollow tubular body (12) which forms a tube that can be connected to the load mouth of the tank. On the inner wall of the tube (12), a shutter (16) is hinged, configured to assume a first operative fuel loading position, wherein it lies on a plane substantially parallel to the vertical axis (A) of the tube (12), a second operative closed position, wherein it is horizontally positioned to completely obstruct the tube (12), and at least one third partial opening position, wherein it permits the passage of a limited flow of fuel. The shutter (16) is operatively connected to a float (24), externally arranged with respect to the tube (12) and hinged on the outer wall of the tube (12) by means of one or more arms (26). At least one cam element (30) is made integral with the shutter (16), element (30) provided with one or more notches (32, 32') adapted to cooperate with the shaped ends (34, 36) of one or more lever elements (38, 40) driven by at least one of the arms (26) of the float (24), so to maintain the shutter (16) in one or more of the aforesaid predefined operative positions during one same functioning cycle.
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