Patent ID: 6672812
Filing Date: 2004-01-06
Classification: F16B

Abstract:
A screw comprising a head part, a tapered insert part and a shank part disposed between said head part and said tapered insert part and having a shank axis, said shank part having a first shank segment adjacent to said head part and a second shank segment adjacent to said tapered insert part, said first shank segment having a first radius relative to the shank axis, said second shank segment having a surface that is formed with a screw thread, said screw thread including interconnected thread sections that have a second radius relative to the shank axis and larger than the first radius, said surface of said second shank segment being further formed with at least one projecting element between two neighboring interconnected ones of said thread sections that are proximate to said tapered insert part, said projecting element having a greatest radial dimension with respect to the shank axis that is greater than the first radius and less than the second radius; said two neighboring interconnected ones of said thread sections on said surface of said second shank segment have a third radius relative to the shank axis that is greater than the first radius and less than the second radius, and remaining ones of said thread sections on said surface of said second shank segment have the second radius relative to the shank axis.