Patent ID: 7275699

Claim:
A self-contained, mobile foam dispensing system for application of foam insulation around underground piping, wherein the foam is formed by mixing several reactants, the system comprising: a power source operative to provide power to the system; holding tanks, each for storing one of the reactants; temperature control sub-systems including respective chillers operative to chill respective reactants and heaters operative to heat the respective reactants; a mix head nozzle operative to mix the reactants so as to form said foam, the mix head nozzle having an elongated straight cylindrical shape to which an injection hose for dispensing the foam around said piping is clampable, as well as a plurality of orifices oriented to allow mixing of the reactants in a dispense mode of operation; and metering pumps operative to supply the reactants to respective ones of the temperature control sub-systems in stoichiometric proportions and at predetermined pressures.