Cable tie

A fastening device, comprising:

• a flexible, elongated strap having longitudinally opposed first and second end portions and a body portion therebetween, the body portion having opposed first and second broad sides and strap teeth on each of the first and second broad sides;
• a head disposed at the first end portion, the head having (a) a perimeter wall surrounding an opening, and (b) a movable pawl extending from the perimeter wall into the opening, the movable pawl having at least one pawl tooth, the perimeter wall including an abutment portion opposite the movable pawl, the abutment portion including
• an abutment tooth opposite the movable pawl;
• and a tail disposed at the second end portion,
• wherein the opening is dimensioned to accommodate insertion, tail first, of the strap through the opening,
• wherein the strap teeth on the first broad side and the at least one pawl tooth are respectively configured for engagement therebetween, upon the tail-first insertion of the strap through the opening,
• wherein the strap teeth on the second broad side and the abutment tooth are respectively configured for engagement therebetween, upon the tail-first insertion of the strap through the opening, and
• wherein at least one of the strap teeth on the second broad side has a working surface that, upon the tail-first insertion of the strap through the opening, inclines in a direction of insertion as the working surface of the at least one of the strap teeth on the second broad side extends away from the second broad side, for mating engagement with the abutment tooth;
• wherein the abutment tooth is located within an extent of the at least one pawl tooth.

A fastening device, comprising:

• a flexible, elongated strap having longitudinally opposed first and second end portions and a body portion therebetween, the body portion having opposed first and second broad sides and strap teeth on each of the first and second broad sides;
• a head disposed at the first end portion, the head having (a) a perimeter wall surrounding an opening, the opening having only a single entry and only a single exit, and (b) a movable pawl extending from the perimeter wall into the opening, the movable pawl having at least one pawl tooth, the perimeter wall including an abutment portion opposite the movable pawl, the abutment portion including an abutment tooth opposite the movable pawl;
• and
• a tail disposed at the second end portion,
• wherein the opening is dimensioned to accommodate insertion, tail first, of the strap through the single entry of the opening,
• wherein the strap teeth on the first broad side and the at least one pawl tooth are respectively configured for engagement therebetween, upon the tail-first insertion of the strap through the single entry of the opening,
• wherein the strap teeth on the second broad side and the abutment tooth are respectively configured for engagement therebetween, upon the tail-first insertion of the strap through the single entry of the opening, and
• wherein the abutment tooth has a working surface inclined in a direction opposite a direction of insertion as the working surface of the abutment tooth extends away from the abutment portion,
• wherein the abutment tooth is located within an extent of the at least one pawl tooth.

A fastening device, comprising:

• a flexible, elongated strap having longitudinally opposed first and second end portions and a body portion therebetween, the body portion having opposed first and second broad sides and strap teeth on each of the first and second broad sides;
• a head disposed at the first end portion, the head having (a) a perimeter wall surrounding an opening, and (b) a movable pawl extending from the perimeter wall into the opening, the movable pawl having at least one pawl tooth, the perimeter wall including an abutment portion opposite the movable pawl, the abutment portion including
• an abutment tooth opposite the movable pawl;
• and a tail disposed at the second end portion,
• wherein the opening is dimensioned to accommodate insertion, tail first, of the strap through the opening,
• wherein the strap teeth on the first broad side and the at least one pawl tooth are respectively configured for engagement therebetween, upon the tail-first insertion of the strap through the opening,
• wherein the strap teeth on the second broad side and the abutment tooth are respectively configured for engagement therebetween, upon the tail-first insertion of the strap through the opening, and
• wherein at least one of the strap teeth on the second broad side has a working surface that, upon the tail-first insertion of the strap through the opening, inclines in a direction of insertion as the working surface of the at least one of the strap teeth on the second broad side extends away from the second broad side, for mating engagement with the abutment tooth;
• wherein the strap teeth on the first broad side are offset from the strap teeth on the second broad side by one half of a tooth length of a strap tooth of the strap teeth on the first or second broad side.