Abstract: An embeddable breakaway utility pole comprises separate upper and lower aluminum pole pieces, wherein the lower pole piece is to be embedded below ground surface. The upper and lower pole pieces are interconnected by a weld which defines a breakaway zone enabling the upper pole piece to break off the lower pole piece in response to vehicular impact. The weld can be connected to a backer ring which provides a guide surface that axially aligns the pole pieces. Alternatively, the pole can be formed of a single pole piece which is welded between its ends to form a weakened region that defines the breakaway zone.

Abstract: An embeddable breakaway utility pole comprises separate upper and lower aluminum pole pieces, wherein the lower pole piece is to be embedded below ground surface. The upper and lower pole pieces are interconnected by a weld which defines a breakaway zone enabling the upper pole piece to break off the lower pole piece in response to vehicular impact. The weld can be connected to a backer ring which provides a guide surface that axially aligns the pole pieces. Alternatively, the pole can be formed of a single pole piece which is welded between its ends to form a weakened region that defines the breakaway zone.

Abstract: An embeddable breakaway utility pole comprises separate upper and lower aluminum pole pieces, wherein the lower pole piece is to be embedded below ground surface. The upper and lower pole pieces are interconnected by a weld which defines a breakaway zone enabling the upper pole piece to break off the lower pole piece in response to vehicular impact. The weld can be connected to a backer ring which provides a guide surface that axially aligns the pole pieces. Alternatively, the pole can be formed of a single pole piece which is welded between its ends to form a weakened region that defines the breakaway zone.

Abstract: A cutting assembly includes a holder and a cutting tool body mounted in a bore of the holder, and a retainer sleeve for retaining the tool body axially within the bore while permitting the tool body to rotate freely about a longitudinal axis thereof. The retainer sleeve includes inwardly bent tongues which engage a groove formed in a shank of the tool body. The retainer sleeve is configured to facilitate the escape of fines from the groove during a cutting operation.

Abstract: A cutting assembly includes a holder and a cutting tool body mounted in a bore of the holder, and a retainer sleeve for retaining the tool body axially within the bore while permitting the tool body to rotate freely about a longitudinal axis thereof. The retainer sleeve includes inwardly bent tongues which engage a groove formed in a shank of the tool body. The retainer sleeve is configured to facilitate the escape of fines from the groove during a cutting operation.

Abstract: A cutter tool comprises a tool holder, a cutting bit mounted in a bore of the tool holder, and a washer disposed between the tool holder and the cutting bit. The washer is a conical (Belleville) washer which makes annular line contact with a shoulder of the cutting bit, and with an edge of the bore of the tool holder, in order to effectively seal-out fines from the bore.