Abstract: A tool for boring has a first shaft for drivingly linking at a first end to a portable rotatable machine. At a second end, the tool has a fastener to which a modular auger section can be drivingly linked. A second shaft of the tool has an outer surface to which a radially inwardly extending edge of a helical flight is attached. A cylindrical collar is attached to a radially outwardly extending peripheral edge of the flight and is mounted radially outwardly of the second shaft. An insulator interposed between the shafts electrically insulates the shafts from each other. The shafts can be unlinked through a shear pin breaking in response to a predetermined amount of relative torque to the shafts.

Abstract: A tool for boring has a first shaft for drivingly linking at a first end to a portable rotatable machine. At a second end, the tool has a fastener to which a modular auger section can be drivingly linked. A second shaft of the tool has an outer surface to which a radially inwardly extending edge of a helical flight is attached. A cylindrical collar is attached to a radially outwardly extending peripheral edge of the flight and is mounted radially outwardly of the second shaft. An insulator interposed between the shafts electrically insulates the shafts from each other. The shafts can be unlinked through a shear pin breaking in response to a predetermined amount of relative torque to the shafts.

Abstract: A bristle strip includes a channel, a mat, staples and nails. The mat is made of a plurality of bristles. The staples penetrate the channel and the mat and one staple is placed within one-half inch of each end of the channel to retain the bristles therein. The nails are inserted in each end of the channel to further ensure retention of the bristles.

Abstract: A bristle strip includes a channel, a mat, staples and nails. The mat is made of a plurality of bristles. The staples penetrate the channel and the mat and one staple is placed within one-half inch of each end of the channel to retain the bristles therein. The nails are inserted in each end of the channel to further ensure retention of the bristles.

Abstract: A bristle strip for rotary brushes comprising a supporting channel in which the closed ends of U-shaped bristles are clamped. The channel is provided with laterally-extending guide members mounted directly thereon that project laterally outwardly beyond its side flanges to guide the strip when it is inserted in a guide track on a rotary drum and to retain it therein.

Abstract: A bristle strip for rotary brushes comprising a supporting channel in which the closed ends of U-shaped bristles are clamped. The channel is provided with laterally-extending guide members mounted directly thereon that project laterally outwardly beyond its side flanges to guide the strip when it is inserted in a guide track on a rotary drum and to retain it therein.

Abstract: A bristle strip for rotary brushes comprising a supporting channel in which the closed ends of the U-shaped bristles are clamped. The channel is provided with laterally-extending guide members mounted directly thereon that project laterally outwardly beyond its side flanges to guide the strip when it is inserted in a guide track on a rotary drum and to retain it therein. Due to the simple nature of the strip it can be produced at a low cost without special tooling.

Abstract: A bristle strip for rotary brushes comprising a supporting channel in which the closed ends of the U-shaped bristles are clamped. The channel is provided with laterally-extending guide members mounted directly thereon that project laterally outwardly beyond its side flanges to guide the strip when it is inserted in a guide track on a rotary drum and to retain it therein. Due to the simple nature of the strip it can be produced at a low cost without special tooling.

Abstract: A bristle strip for rotary brushes comprising a channel in which the closed ends of the U-shaped bristles are clamped. The channel is provided with pairs of opposed slots in its upstanding flanges or sides which receive guide lugs that project laterally outwardly to guide the strip when it is inserted in a guide track on a rotary drum and to retain it therein. Each lug is provided with an indentation for engaging the mat of bristles to hold the lug in a lateral fixed position. Due to the simple nature of the strip it can be produced at a low cost without special tooling.

Abstract: A push broom having a head formed from a bristle strip or strips of the type consisting of a channel with U-shaped bristles extending downwardly therefrom and bent into an oval formation with curved ends. The curved ends receive complemental curved clips which are slipped downwardly over the curved channel ends and are clamped thereto. The clips may have depending flanges which overlap the upper portions of the bristles. A reinforcing member may be inserted and clamped in the oval formation. Also a special strong connection may be provided to connect the handle to the head.

Abstract: A bristle section for rotary brushes comprising a bristle-carrying channel fitting into and retained in a mounting channel which has retaining ears along its length which slide into retaining channels in a receiving and retaining channel on the brush drum. The mounting channel is formed with flanges having flared outer edges so as not to tend to cut the bristles as they bend into contact therewith during rotation of the brush.

Abstract: A helical brush section consisting of a split tubular support or drum. The drum is offset at the split when the brush strip is helically wound thereon with its ends corresponding to the shoulders at the ends of the offset drum. Then the section is subjected to axial pressure to restore the drum to cylindrical form which distorts and flattens the ends of the brush strip inwardly substantially flush with the drum ends. Multiples of this resulting section are adapted to be disposed on a mandrel with their adjacent edges and shoulders in axially-abutting relationship to form a continuous helical rotary brush with a minimum of bristle gaps at the flattened ends of the brush strips.

Abstract: A helical brush section consisting of a split tubular support which is offset at the split longitudinally to provide helical edges terminating in longitudinally extending contact shoulders at its opposed ends. This section has a bristle-carrying strip helically wound thereon. Multiples of this section are adapted to be disposed on a mandrel with their adjacent edges and shoulders in interfitting nesting engagement to form a continuous helical rotary brush.

Abstract: The invention provides an improved rotary broom assemblage of the type wherein a plurality of bristles are mounted upon a tubular core element and rotated by a shaft passing through the core element. The invention provides two pairs of circular plates, mounted in spaced relationship on the shaft, with each pair of plates defining an outwardly opening V-shaped groove within which a split ring fastening element is mounted. The tubular core is provided with an annular outwardly projecting depression in its wall portions adjacent each end of the core which are respectively engageable by a split ring member when expanded by axial movement of one of each pair of circular plates toward the other by fastening bolts.

Abstract: A sweeper brush section comprising a deformed metal channel with a plurality of outwardly-opening cups or sockets at regularly spaced intervals in which are positioned the inner U-shaped ends of tufts or bunches of wire bristles mounted in non-metallic sleeves. These sleeves are pivoted in the respective cups about transverse axis for limited movement to prevent breakage of the bristle wires, especially at the time of the initial impact of the wires with the surface being swept.