Patent ID: 6524045
Filing Date: 2003-02-25
Classification: F16B

Abstract:
An anchor comprising:a threaded shank having a head and a mating threaded plug; a tubular spacer located on said threaded shank between said head and said mating threaded plug; and a tubular sleeve located on said threaded shank between said tubular spacer and said mating threaded plug, said mating threaded plug expanding said tubular sleeve upon said mating threaded plug being rotated with respect to said threaded shank so as to move said mating threaded plug axially toward said head of said threaded shank, said tubular sleeve including a rolled up cut-out unitary piece of sheet material comprising: a plurality of expansion legs located on an end of said tubular sleeve closest to said mating threaded plug, said plurality of expansion legs expanding radially upon said mating threaded plug being rotated so as to move axially toward said head of said threaded shank; and an axially compressible sleeve portion, located on an end of said tubular sleeve furthest away from said mating threaded plug and including a shearable portion which allows said axially compressible sleeve portion to be axially shortened after shearing said axially compressible sleeve portion into two pieces and axially compressing said two pieces toward each other upon said mating threaded plug being rotated so as to move axially toward said head of said threaded shank.