Patent ID: 7294204

Claim:
An apparatus for painting traffic marks on a road surface, said apparatus comprising: a trailer unit, comprising a first support and a second support being parallel to each other; and at least one coupling unit to couple said first support to said second support; a gantry unit, comprising: a first Y-axial gantry and a second Y-axial gantry coupled at both ends to said first support and said second support to be parallel with each other, wherein said first X-axial gantry and said second Y-axial gantry each have a Y-axial guide groove and move longitudinally in a direction substantially perpendicular to said first support and said second support; a first connecting rod and a second connecting rod, said first connecting rod coupling a first end of said first Y-axial gantry to a first end of said second Y-axial gantry and a second connecting rod coupling a second end of said first Y-axial gantry to a second end of said second Y-axial gantry; and at least one X-axial gantry having an X-axial guide groove, wherein said X-axial gantry is coupled to said first Y-axial gantry and said second Y-axial gantry to be longitudinally movable in a direction substantially parallel to said first support and said second support along said Y-axial guide groove; a jet unit coupled to said X-axial gantry to be longitudinally movable along said X-axial guide groove, said jet unit having a jet nozzle, a check valve and a jet nozzle rotating unit; a feeding device, comprising: a first feeding unit to move the Y-axial gantry, said first feeding unit comprising: a rack longitudinally provided on said first support and said second support; a pinion to engage said rack; and a first motor having a motor housing coupled to said Y-axial gantry and an output shaft coupled to said pinion to rotate said pinion; a second feeding unit to move the X-axial gantry, said second feeding unit comprising: a Y-axial belt longitudinally provided in said Y-axial gantry; a second motor to rotate said Y-axial belt; and a connecting unit coupled to said Y-axial belt and said X-axial gantry for coupling said Y-axial gantry to said X-axial gantry; a third feeding unit to move said jet unit, said third feeding unit comprising: an X-axial belt longitudinally provided in said X-axial gantry and coupled to said jet unit; a third motor to rotate said X-axial belt; a control unit to control operation of said feeding device and operation of said jet unit; and at least two X-axial wheels and at least two Y-axial wheels placed on a diagonal line of said first support and said second support.