Patent ID: 6835036
Filing Date: 2004-12-28
Classification: F16B

Abstract:
An expansion anchor comprising:a stud having threads including a root, a land, and a taper extending between said root and said land; and a helical member threadingly engageable with said threads, said helical member having a leading edge; wherein said helical member is movable between an unexpanded position and an expanded position, wherein in the expanded position said leading edge is forced radially outwardly by said land, and said helical member includes a body and a finger thinner than said body, said finger having said leading edge, and wherein a root contacting surface of said body has an axial length of less than a corresponding axial length of said root, and said finger having an axial length of less than an axial length of said taper, and an angle with respect to said land substantially complementary with an angle of said taper with respect to said land.