De-icing spraying apparatus

Claim 1

In de-icing spraying apparatus a spray nozzle support structure comprising: a. a first section of pipe having a first plurality of spray nozzles spaced from each other along its length, b. a first support section for said first section of pipe symmetrically designed with reference to its vertical axis, c. a second section of pipe having a second plurality of spray nozzles spaced from each other along its length, d. a wing boom support seCtion for said second section of pipe, e. hinge means between said wing boom support section and said first support section to permit limited vertical and horizontal pivotal movement of said wing boom section in relation to said first section, f. resilient support means to provide resilient support for said wing boom section during said limited vertical and horizontal pivotal movement and including a first and a second flexible support cable each having a first end attached to said wing boom support section, a second end of the first cable being connected to an upper portion of the first support section on one side of said longitudinal axis and a second end of said second cable being connected to an upper portion of the first support section on the opposite side of said longitudinal axis, g. said wing boom support section comprising a first elongate boom section and a second elongate boom section with a hinge portion therebetween, said second section of pipe being in two parts with a first part supported, in use, by the first elongate boom section and a second of said two parts supported, in use, by the second elongate boom section with said first and second elongate boom sections colinear, a flexible length of pipe interconnecting said two parts, said hinge portion permitting said second elongate boom section to be folded to a position in which it is substantially parallel to the first elongate boom section when not in said colinear use position, said hinge means permitting the wing boom section to be then folded to a storage position substantially at right angles to said co-linear use position, h. wherein the pipes of said structure are connected to receive spraying chemical from a hydraulic system including filter means for said chemical and including two diaphragm pumps to supply chemical to said filter means, i. a coated suction gallery unit for supplying chemical to said two diaphragm pumps and said filter means including a coated filter unit and a filter element delivery unit connected to the output of said coated filter unit, j. said first section of pipe being connected through a first hydraulic control valve to a first output of said filter element delivery unit, said first part of said second section of pipe being connected through a second hydraulic control valve to a second output of said filter element delivery unit, said filter element delivery unit being connected to the output of said coated filter unit through a remote control valve unit to facilitate pre-setting of the apparatus and remote control, in use, from the cab of an operating vehicle, and k. wherein said coated suction gallery unit is provided with a tank suction valve and a self-filling suction valve to facilitate filling of a chemical storage tank on a vehicle associated with the spraying apparatus from a main storage tank external to the vehicle.