Patent ID: 7686233

Claim:
A system for dispensing an anti-traction gel material on a target surface, comprising: a dispensing nozzle having a polymer powder dispensing section and a water stream dispensing section; a polymer powder dispensing system comprising; a polymer particle storage tank comprising a polymer particle powder having a mean particle size distribution in a range of 0.025 mm to 0.400 mm; a jet pump comprising an annular venturi disposed within a body of said jet pump defining a cavity in said jet pump; a powder metering nozzle comprising: an elongated hollow nozzle body having a substantially cylindrical lower section, a substantially conical upper section, and a base section configured to be attached to said jet pump; and a plurality of openings formed in the elongated hollow nozzle body and configured to flow the polymer particle powder from said polymer particular storage tank, through the openings away from the conical upper section and toward the lower section, and towards said annular venturi of said jet pump, wherein said plurality of openings comprises a first plurality of openings formed in a bottom section of the substantially cylindrical lower section, a second plurality of openings formed in a top section of the substantially cylindrical lower section, and a third plurality of openings formed in the substantially conical upper section; wherein a ratio R 1 of a combined surface area of the first and the second plurality of openings to a cross sectional area of said cavity in the jet pump is greater than about 1.5; and wherein a ratio R 2 of a combined surface area of the third plurality of openings to said cross sectional area of said cavity in the jet pump is greater than about 0.25; and a compressed air system that provides motive air to transport the polymer particle powder from the polymer particle powder storage tank to the polymer powder dispensing section of the dispensing nozzle; and a water dispensing system that provides a water stream to the water stream dispensing section of the dispensing nozzle, wherein said water dispensing system, said polymer powder dispensing system and said dispensing nozzle are configured to maintain physical separation of the polymer particle powder and the water stream until the polymer particle powder and the water exit the dispensing nozzle and wherein said dispensing nozzle is further configured to mix the water stream with the polymer particle powder upon exit from said water stream dispensing section and said polymer powder dispensing section of the dispensing nozzle at a ratio of water to powder ranging from 7:1 to 16:1 by weight to form the anti-traction material.