Patent ID: 7156133

Claim:
Apparatus for controllably delivering foam producing liquid from a chamber of a supply tank, upwardly and into a chamber of a holding tank of a fire truck for replenishment of foam producing liquid in the holding tank, said fire truck having a pressurized air source and said supply tank having a threaded spout, comprising: a cap having internal threads mateable with the threads of the supply tank spout; an air hose connectable at one end to the fire truck pressurized air source and passing through and being connected to the cap; a pressure regulator connected to the air hose at a middle portion of said air hose; a control valve connected to and between the pressure regulator and the cap; a fill hose connected to and passing through the cap, said fill hose having a length sufficient for extending from adjacent the ground upwardly and into communication with the chamber of the fire truck holding tank chamber; and a liquid level sensing, signaling element connectable to the control valve and connectable in liquid communication with the holding tank chamber of the fire truck, said sensing and signaling element having first and second set points and being adapted to respectively open and close the control valve in response to changing liquid levels in the holding tank chamber, said sensing and signaling element additionally being adapted to close the control valve in response to the absence of fluid entering the holding tank chamber from the supply tank.