Anti-siphon device

An anti-siphon device for a fuel storage system, the anti-siphon device comprising:

• a ring concentric with a longitudinal axis and defining an interior opening;
• and
• at least one fin spanning across the interior opening of the ring and having a depth extending away from the ring along the longitudinal axis;
• wherein the interior opening of the ring defines a diameter and wherein the ring abuts an end of a tube having an inner diameter substantially equal to the diameter of the interior opening of the ring such that the ring supports the at least one fin within the tube without substantially narrowing the inner diameter of the tube, thereby minimizing a fluid pressure drop through the tube during refilling;
• wherein the at least one fin extends from the ring to a distal edge, wherein the distal edge defines a semi-circular cut-out when viewed in a direction perpendicular to the longitudinal axis;
• wherein the at least one fin includes a cross section defining an airfoil shape when viewed in a direction perpendicular to the longitudinal axis and perpendicular to the semi-circular cut-out;
• and
• wherein the airfoil shape of the at least one fin includes a first edge, a second edge, and a middle section disposed between the first edge and the second edge, wherein the first edge and the second edge include a thickness between the range of 0.5 mm and 1.0 mm, and the middle section includes a thickness between the range of 0.75 mm and 1.5 mm.

A fuel storage system for a vehicle, the fuel storage system comprising:

• a tank defining an inlet;
• a check valve coupled to the tank and in fluid communication with the inlet of the tank and including an inlet tube, the check valve configured for permitting fuel flow into the tank and preventing fluid flow from the tank;
• a fuel intake tube coupled to the check valve;
• and
• an anti-siphon device disposed between and rotatably positionable relative to the check valve and the fuel intake tube, the anti-siphon device including:
• a ring concentric with a longitudinal axis and defining an interior opening;
• at least one fin spanning across the interior opening of the ring and having a depth extending away from the ring along the longitudinal axis;
• and
• at least one projection extending inward from the ring into the interior opening of the ring;
• wherein the interior opening of the ring defines a diameter and wherein the ring abuts an end of the inlet tube having an inner diameter substantially equal to or smaller than the diameter of the interior opening of the ring such that the ring supports the at least one fin within the inlet tube without substantially narrowing the inner diameter of the inlet tube, thereby minimizing a fluid pressure drop through the inlet tube during refilling;
• and
• wherein the at least one fin and the at least one projection cooperate to prevent passage of an object having an outer diameter of at least 5.0 mm from passing through the interior opening of the ring.

A fuel storage system for a vehicle, the fuel storage system comprising:

• a tank defining an inlet
• a check valve coupled to the tank and in fluid communication with the inlet of the tank and including an inlet tube, the check valve configured for permitting fuel flow into the tank and preventing fluid flow from the tank;
• a fuel intake tube coupled to the check valve;
• and
• an anti-siphon device disposed between and rotatably positionable relative to the check valve and the fuel intake tube, the anti-siphon device including:
• a ring concentric with a longitudinal axis and defining an interior opening;
• and
• at least one fin spanning across the interior opening of the ring and having a depth extending away from the ring along the longitudinal axis;
• wherein the interior opening of the ring defines a diameter and wherein the ring abuts an end of the inlet tube having an inner diameter substantially equal to or smaller than the diameter of the interior opening of the ring such that the ring supports the at least one fin within the inlet tube without substantially narrowing the inner diameter of the inlet tube, thereby minimizing a fluid pressure drop through the inlet tube during refilling;
• and
• wherein the airfoil shape of the at least one fin includes a first edge, a second edge, and a middle section disposed between the first edge and the second edge, wherein the first edge and the second edge include a thickness between the range of 0.5 mm and 1.0 mm, and the middle section includes a thickness between the range of 0.75 mm and 1.5 mm.