Patent ID: 6099080
Filing Date: 2000-08-08
Classification: E01C

Abstract:
A dry cutting and grooving apparatus for pavement, comprising:a body having a front end;a drive disposed in the body;a rotatable blade for cutting or grooving, operatively connected to be driven by the drive wherein the blade is rotatable in a direction to scrape out and bring up a pavement layer toward a front end of the body;a housing covering all of the blade except a lower-end portion;a scavenging assembly for scavenging dust and chips brought up by the blade and disposed in the body, the scavenging assembly having a combination of an air supply assembly and a suction device, the air supply assembly being disposed to feed pressurized air to the blade at an upstream end of the housing, and the suction device being disposed to suck air dust and chips from a downstream end of the housing;an air flow passage disposed in the blade, communicating with the air supply assembly, to discharge air from the blade;wherein the blade member further comprises a pair of base plates, each blade having an outer periphery and one or more cutting tips on the outer periphery, wherein the base plates define an interval therebetween in which the air flow passage is disposed, and wherein the air flow passage has at least one opening disposed in the outer periphery of the blade membera shaft operatively connected to the drive and carrying the blade member fixed thereto, wherein the shaft further comprises an air flow passage communicating the air supply assembly with the air passage in the blade member; andwherein said shaft further comprises a swivel joint at one end communicating the air flow passage of the shaft with the air supply assembly.