Cast power brush

In a rotary power driven high speed, heavyduty municipal sweeping brush element having a working surface that is flat or disc shaped and provided with means for attaching the brush to a rotary heavy duty source of power,

• said brush element containing a multiplicity of bristles having medial bends therein formed into a plurality of tufts containing a plurality of bristles, each tuft being surrounded by a mechanical restraining means so that a bight is formed in each of the tufts above said restraining means and so that the major portion of the bristles extend below said restraining means to perform the sweeping function, and a back for said brush and a positioning means for said tufts comprising a body of a fiberglass filled and reinforced substantially inflexible high impact thermoset polyester resin having a notched izod impact strength greater than 2 foot-pounds per inch and a Shore D hardness greater than 50 cast around said tufts so that said bight is embedded in said resin with its upper end closer to the top surface of said brush back than to the bottom surface thereof and with said restraining means being closer to the bottom surface of said back than to the top surface thereof and at least substantially completely embedded in the body of said resin.