公开(公告)号：US3605547A

公开(公告)日：1971-09-20

申请号：US3605547D

申请日：1969-04-10

Applicant: DAVID I MILLET

Inventor： MILLET DAVID I

IPC: F16B13/08 ,  F16B37/04

CPC classification number: F16B13/0808 ,  F16B37/04 ,  Y10S411/969 ,  Y10T29/49833 ,  Y10T29/49838

Abstract: A SCREW ANCHOR, TO BE ENGAGED BY A BOLT TRAVERSING A WALL, COMPRISES A RIGID BAR ALONGSIDE WHICH A LANYARD IS ENTRAINED THROUGH A HOLE PREFORMED IN THE WALL OR PIERCED IN IT BY AN ENLARGED, POINTED HEAD OF THE BAR, THE LANYARD IS ATTACHED TO THE BAR IN THE VICINITY OF A THREADED TRANSVERSE BORE THEREOF WHICH ALIGNS ITSELF WITH THE PIERCED HOLE WHEN THE BAR IS PULLED FLAT AGAINST THE REMOTE WALL SURFACE AFTER ITS TRAILING END OR FOOT HAS CLEARED THE HOLE, MEANS BEING PROVIDED FOR SWINGING THE BAR OUT OF ALIGNMENT WITH THE LANYARD IN ORDER TO PREVENT ITS FOOT FROM BLOCKING THE PULLBACK.