Apparatus for dispensing grit material

Claim 1

IN AN ATTACHMENT FOR A LAND VEHICLE HAVING TRACTION DRIVE MEMBERS, APPARATUS FOR DISPENSING GRIT MATERIAL, THE APPARATUS INCLUDING A RESERVOIR FOR GRIT MATERIAL MOUNTED ON THE VEHICLE, A CYLINDRICAL HOUSING EXTENDING FROM SAID RESERVOIR, A HORIZONTAL SCREW CONVEYOR WITHIN SAID CYLINDRICAL HOUSING, A PORTION OF SAID SCREW CONVEYOR EXTENDING INTO SAID RESERVOIR, POWER MEANS CONNECTED TO SAID SCREW CONVEYOR FOR ACTUATING THE LATTER AND MOVING THE GRIT MATERIAL LONGITUDINALLY THROUGH SAID HOUSING, A MANIFOLD ISSUING FROM THE TERMINAL OF SAID HOUSING REMOTE FROM SAID RESERVOIR FOR DELIVERING GRIT MATERIAL TO THE LOCUS OF THE TRACTION DRIVE MEMBERS, THE SCREW CONVEYOR EXTENDING WITHIN SAID CYLINDRICAL HOUSING TO A POINT PROXIMATE SAID MANIFOLD, DISCHARGE NOZZLES CONNECTED TO THE MANIFOLD TERMINALS, GAS PRESSURE MEANS IN COMMUNICATION WITH SAID MANIFOLD ADJACENT SAID DISCHARGE NOZZLES FOR FACILITATING EMISSION OF THE GRIT MATERIAL, SOLENOID VALVES IN SPACED RELATION TO THE TERMINALS OF THE MANIFOLD FOR CONTROLLING THE PRESSURE OF THE GRIT MATERIAL EMITTED THROUGH THE DISCHARGE NOZZLES, AND MEANS FOR ACTUATING SAID SOLENOID VALVES.