Patent ID: 9441746
Filing Date: 2016-09-13
CPC Classification: F01D,F01M,F16K,F16N,Y10T

Claim Text:
1. An anti-siphon valve for a tank of fluid, comprising: a body having an inlet, an outlet, and a passage for the fluid, the passage connecting the inlet to the outlet; a moveable cut-off device mating with a seat to close the passage, the cut-off device being normally in a closed position and designed to open the passage in the presence of a pressure difference between the inlet and the outlet that is greater than a positive threshold value; and an auxiliary control mechanism physically engaging with the cut-off device, the auxiliary control mechanism being disposed toward the open position of the passage; wherein the auxiliary control mechanism of the cut-off device is configured to act on the cut-off device only in the opening direction of the passage, so as to enable the cut-off device to open under the effect of the pressure difference independently of the auxiliary control mechanism.