Dust removal apparatus for a concrete saw

• US 5,167,215 A
• Filed: 10/11/1991
• Issued: 12/01/1992
• Est. Priority Date: 10/11/1991
• Status: Expired due to Fees

• Current Assignee: Equipment Development Company Incorporated
• Original Assignee: Equipment Development Company Incorporated
• Inventors: Harding, Edward M. Jr.
• Primary Examiner(s): Kisliuk, Bruce M.
• Assistant Examiner(s): MARLOTT, JOHN
• Application Number:
  US07/774,808
• Time in Patent Office: 417 Days
• Field of Search: 125/12, 125/13.01, 125/13.02, 125/13.03, 125/14, 125/15, 51/268, 51/270, 51/272, 51/273, 51/174, 51/176, 51/177, 83/100, 83/168, 144/252 R, 144/252 A, 30/124, 30/391
• US Class Current: 125/13.01
• CPC Class Codes: B23D 59/006 for removing or collecting chips
• CPC Class Codes: B23Q 11/0046 by sucking
• CPC Class Codes: Y10T 83/207 By suction means
• CPC Class Codes: Y10T 83/242 With means to clean work or tool

Abstract

A concrete saw mounted on a wheeled housing for making a substantially linear cut in the surface of a masonry slab is provided with a dust removal apparatus. The dust removal apparatus includes a blade guard partially surrounding the circular blade mounted for rotation on the side of the wheeled housing and a pivotally mounted funnel mounted on the blade guard. The funnel is telescopically mounted on a portion of the blade guard and extends between the blade guard and the slab being cut. A bottom edge of the funnel is provided with a rounded bearing surface so that it rides on the surface of the slab. A vacuum machine is connected to an exhaust duct of the funnel so that concrete dust generated during the making of a cut is continuously exhausted through the funnel and a flexible hose to the vacuum machine as a cut is being made.

Claims

1. 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.

2. The dust removal apparatus of claim 1 wherein said exhaust duct extends through said end wall.

3. The dust removal apparatus of claim 2 wherein a longitudinal axis of the exhaust duct is disposed substantially tangentially to the edge of the circular blade.

4. The dust removal apparatus of claim 3 wherein the bottom edge of the funnel means has a rounded bearing surface for engaging the surface of the workpiece.

5. The dust removal apparatus of claim 4 further including a vacuum source connected to said exhaust duct.

6. Dust removal apparatus for a concrete saw, said concrete 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 transverse 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 inside of said blade guard about an axis thereon a predetermined distance away from a rotational axis of said circular blade and extending from said blade guard to the surface of said workpiece, said funnel means having a rounded bottom edge which rests on and follows the contour of the surface of the workpiece to thereby pivot the funnel means about said axis,

said funnel means further having bifurcated input end which straddles the circular blade and further including an exhaust duct through a wall 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.

7. The dust removal apparatus of claim 6 wherein said rounded bottom edge is located at a rear end of said funnel means.

8. The dust removal apparatus of claim 6 wherein said rounded bottom edge is located to the rear of said bifurcated input end of said funnel means.