Dust removal apparatus for a concrete saw

Dust removal apparatus for a concrete saw, said concentrate saw including a wheeled housing for rolling on the surface of a workpiece to be cut, and a circular blade rotatably mounted on a sidewall of the housing for making a substantially linear cut in the workpiece as the wheeled housing traverses a linear path, comprising:

• a blade guard having a top wall covering an upper edge of the blade and parallel sidewalls straddling the sidewalls of the circular blade, said blade guard being rigidly secured to said side of said wheeled housing;
• and
• funnel means pivotably mounted about an axis on said blade guard and extending from said blade guard to the surface of said workpiece, said funnel means being telescopically disposed in a portion of the blade guard and having a bottom edge which rests on and follows the contour of the surface of the workpiece to thereby pivot the funnel means about said axis and telescope the funnel means with respect to the blade guard, said funnel means including an exhaust duct through a wall thereof, wherein a portion of the top wall of the blade guard has a circular curvature which is substantially concentric with the edge of the circular blade, and said funnel means further comprises,
• an end wall having the same circular curvature as the top wall portion of the blade guard which lies over the top wall portion and moves parallel thereto as the funnel means pivots about said axis, and
• sector-shaped sidewalls extending between said axis and said end wall, said sector-shaped sidewalls being substantially parallel to the sidewalls of the blade guard and surrounding portions thereof,
• said funnel means collecting masonry dust from said workpiece generated by the circular blade as the linear cut is made and directing the masonry dust toward a vacuum source through said exhaust duct.