Patent ID: 7695349

Claim:
An apparatus for supplying a constant quantity of abrasive for a blasting machine that ejects a mixed fluid of compressed fluid and the abrasive from a blast gun, comprising: an abrasive tank for storing abrasive, and in the abrasive tank further provided, an abrasive supplying conduit for conveying the abrasive, a rotating disk rotatably provided inside the abrasive tank at a position where the rotating disk is immersed in the abrasive stored in the abrasive tank; and a flow path having a gap being capable to rotate the rotating disk in an airtight state, wherein; the flow path is consisted of a gas flow path and a mixed fluid flow path, the gas flow path being provided in the abrasive tank and isolated in an airtight state, the gas flow path feeds gas, the gas being compressed air or external air, the mixed fluid flow path is communicated with the gas flow path, and supplies a mixed fluid of gas for supplying abrasive and the abrasive, to a blast gun, and the rotating disk is provided with a plurality of hole sections and stirrer blades, and wherein the plurality of hole sections are formed, the hole sections being passed through the rotating disk in the thickness direction and having the same volume, and the positions where each hole section is are provided so as to be equally spaced on the rotating disk in a circumferential direction corresponding to a rotating locus passing through the gap of the flow path, and the stirrer blades are protruded from the rotating disk.