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US 4,451,093 AGranted
Tool for scarifying concrete
OwnerRobert Perezinventor
Life of this patent
Estimating the term…
Abstract
Presented is a tool adapted for use in rupturing the surface of smooth concrete so as to provide a roughened surface. This process is commonly known as "scarifying" concrete. The tool comprises a bit adapted to be mounted in a conventional roto-hammer or other type actuating mechanism that provides a reciprocating and/or rotating motion, the bit being provided with a multiplicity of carbide tips which are driven repeatedly into the concrete surface to effect scarifying thereof.
Claims8
A tool for scarifying concrete comprising:
- (a) a main body having a working face thereof defined by an outer periphery and adapted to face in the direction of a concrete surface requiring scarifying;
- and
- (b) a plurality of elongated carbide tips symmetrical about a longitudinal axis and embedded and brazed in said main body and having free end portions projecting from the working face thereof, said free end portions terminating in flat end faces angularly disposed to said longitudinal axis, each of said carbide tips embedded in said body at an angle to said working face whereby said free end portions lie within the outer periphery of said working face.
A tool for scarifying concrete comprising:
- (a) a main body having a working face thereof defined by an outer periphery and adapted to face in the direction of a concrete surface requiring scarifying;
- and
- (b) a plurality of elongated carbide tips symmetrical about a longitudinal axis and embedded in said main body and having free end portions projecting from the working face thereof, each of said carbide tips embedded in said body at an angle to said working face whereby said free end portions lie within the outer periphery of said working face;
- (c) said carbide tips being cylindrical in configuration so as to present a plurality of arcuate cutting edges to the surface of the concrete to be scarified, whereby upon wear occuring on said arcuate cutting edges, the cylindrical carbide tips may be rotated about their longitudinal axis to present unworn arcuate cutting edges to the surface of the concrete to be scarified;
- (d) said carbide tips embedded in said main body being arranged in rows, with the carbide tips of one row being angularly disposed to the carbide tips of the opposite row.
2 more elements
A tool for scarifying concrete comprising:
- (a) a main body having a working face thereof defined by an outer periphery and adapted to face in the direction of a concrete surface requiring scarifying;
- and
- (b) a plurality of elongated carbide tips symmetrical about a longitudinal axis and embedded in said main body and having free end portions projecting from the working face thereof, each of said carbide tips embedded in said body at an angle to said working face whereby said free end portions lie within the outer periphery of said working face;
- (c) said carbide tips being elongated and quadrilateral in cross section whereby a plurality of edges of said carbide tip are presented to the surface of the concrete to be scarified;
- (d) said carbide tips being arranged in a series of rows with all of the carbide tips of all rows inclined in the same direction.
2 more elements
A tool for scarifying concrete comprising:
- (a) a main body having a working face thereof defined by an outer periphery and adapted to face in the direction of a concrete surface requiring scarifying;
- and
- (b) a plurality of elongated carbide tips symmetrical about a longitudinal axis and embedded in said main body and having free end portions projecting from the working face thereof, each of said carbide tips embedded in said body at an angle to said working face whereby said free end portions lie within the outer periphery of said working face;
- (c) said carbide tips being elongated and quadrilateral in cross section whereby a plurality of edges of said carbide tip are presented to the surface of the concrete to be scarified;
- (d) said carbide tips being arranged in a plurality of rows, with the carbide tips of one row being angularly disposed with respect to the carbide tips of an adjacent row.
2 more elements
A tool for scarifying concrete comprising:
- (a) a main body having a working face thereof defined by an outer periphery and adapted to face in the direction of a concrete surface requiring scarifying;
- and
- (b) a plurality of elongated carbide tips symmetrical about a longitudinal axis and embedded in said main body and having free end portions projecting from the working face thereof, each of said carbide tips embedded in said body at an angle to said working face whereby said free end portions lie within the outer periphery of said working face;
- (c) said carbide tips being cylindrical in configuration so as to present a plurality of arcuate cutting edges to the surface of the concrete to be scarified, whereby upon wear occuring on said arcuate cutting edges, the cylindrical carbide tips may be rotated about their longitudinal axis to present unworn arcuate cutting edges to the surface of the concrete to be scarified;
- (d) said carbide tips being arranged in a plurality of rows, the carbide tips of one row being inclined toward a peripheral portion of said main body, a second row of said carbide tips being inclined toward a peripheral portion of said main body diametrically opposite to said first mentioned peripheral portion;
- and the remaining carbide tips being arranged in a row between said first and second carbide tip rows, with the end carbide tip of said intermediate row of carbide tips being angularly disposed to one another and inclined toward diametrically opposed peripheral portions of said main body.
3 more elements
Dependencies are inferred from the claim text.