US 12,018,607 B2
Automatic DEF tank filling system
Brandon Truan, Bloomfield Township, MI (US); and Timothy Hewitt, Bloomfield Township, MI (US)
Assigned to ZOETIC EQUIPMENT GROUP, Clawson, MI (US)
Filed by ZOETIC EQUIPMENT GROUP, Clawson, MI (US)
Filed on May 5, 2022, as Appl. No. 17/737,623.
Claims priority of provisional application 63/184,782, filed on May 5, 2021.
Prior Publication US 2022/0356827 A1, Nov. 10, 2022
Int. Cl. F01N 3/20 (2006.01)
CPC F01N 3/208 (2013.01) [F01N 2610/02 (2013.01); F01N 2610/142 (2013.01); F01N 2610/144 (2013.01); F01N 2610/148 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A fluid filling system for filling a tank comprising:
a source of fluid;
a pump connected to said source of fluid;
a fill hose having a proximal end and a distal end, said proximal end connected to said pump;
at least one first sensor mounted adjacent said distal end, said distal end being adapted for insertion into the tank;
a control unit (CPU) operatively connected to said at least one first sensor and said pump, said at least one first sensor communicating with said a control unit (CPU) to energize said pump when said at least one first sensor fails to sense fluid when said fill hose is inserted into the tank and said a control unit (CPU) deenergizes said pump when said at least one first sensor senses fluid when inserted into the tank;
a second sensor mounted to said fill hose, said a control unit (CPU) operatively connected to said second sensor and said pump, said second sensor communicating with said a control unit (CPU) to energize said pump when said fill hose is in the tank, said a control unit (CPU) deenergizes said pump when said second sensor senses the fill hose is not in the tank;
said second sensor includes a flap pivotally mounted to said fill hose, said second sensor is a reed switch, whereby said flap is adapted to engage the tank and pivot to engage said reed switch, which when engaged senses said fill hose is in the tank and communicates to said a control unit (CPU) that said pump can operate;
whereby said fluid filling system continually fills the tank through said fill hose.