Self-cutting expansion anchor

A self-cutting expansion anchor comprising:

• a shaft having a generally conical portion;
• a sleeve member having a plurality of expandable sections disposed about the shaft;
• and
• a cutting portion protruding from exactly two of the plurality of expandable sections located on generally opposite sides of the shaft;
• wherein the cutting portions and the corresponding expandable sections are unitary members.

A self-cutting expansion anchor system comprising:

• a threaded shaft having a generally conical portion;
• an expansion sleeve member having a driving end and a plurality of expandable sections disposed about the shaft, the expandable sections having an end portion disposed toward the generally conical portion thereof,
• a hardened cutting portion protruding from at least some of the expandable sections of the expansion sleeve member, the hardened cutting portions and the corresponding expandable sections are unitary members;
• a threaded driving sleeve member disposed about the threaded shaft, the driving sleeve member having a driving end disposed toward the driving end of the expansion sleeve member.

A self-cutting expansion anchor comprising:

• a shaft having a generally conical portion;
• a sleeve member having a plurality of expandable sections disposed about the shaft;
• a hardened cutting portion protruding from at least some of the expandable sections of the sleeve member;
• the hardened cutting portions and the corresponding expandable sections being unitary members;
• wherein the expandable sections of the sleeve member are aligned generally axially along the shaft and have an end portion disposed toward the generally conical portion thereof, the cutting portions protruding generally radially from the end portion of the corresponding expandable sections and extending about a circumferential portion of the corresponding expandable sections.

A self-cutting expansion anchor comprising:

• a shaft having a generally conical portion;
• a sleeve member having a plurality of expandable sections disposed about the shaft;
• and
• a cutting portion protruding from exactly two of the plurality of expandable sections located on generally opposite sides of the shaft;
• the sleeve member including at least one expandable section devoid of cutting portions disposed between the expandable sections having cutting portions;
• the cutting portions extending about corresponding circumferential portions of the corresponding expandable sections on generally opposite sides of the shaft, the expandable sections having cutting portions extending axially beyond the expandable sections devoid of cutting portions.

A self-cutting expansion anchor comprising:

• a shaft having a generally conical portion;
• a sleeve member having a plurality of expandable sections disposed about the shaft;
• and
• a cutting portion protruding from exactly two of the plurality of expandable sections located on generally opposite sides of the shaft;
• the expandable sections of the sleeve member aligned generally axially with the shaft and having an end portion disposed toward the generally conical portion thereof, the cutting portions protruding generally radially from the end portion of the corresponding expandable sections.