公开(公告)号：US20210054866A1

公开(公告)日：2021-02-25

申请号：US16963568

申请日：2019-02-28

Applicant: HILTI AKTIENGESELLSCHAFT

Inventor： Frederic POL ,  Roland SCHNEIDER ,  Michael BISCHOF

IPC: F16B33/00 ,  C22C38/44 ,  C22C38/04 ,  C23C8/32 ,  C21D9/00 ,  C21D6/00

Abstract: A method for producing a bimetallic screw with a tip element and a drive element, in which a first blank comprising a steel with 0.07 to 0.14% by weight carbon, 13 to 15% by weight chromium, 1.3 to 1.7% by weight molybdenum, 1.5 to 2.0% by weight nickel and 1.0 to 1.5% by weight manganese is provided and the tip element is made from the first blank. A bimetallic screw with a tip element and a drive element is also provided, the tip element and the drive element having a different material composition, and the tip element comprising at least in some areas a steel with 0.07 to 0.14% by weight carbon, 13 to 15% by weight chromium, 1.3 to 1.7% by weight molybdenum, 1.5 to 2.0% by weight nickel and 1.0 to 1.5% by weight manganese.

公开(公告)号：US20210301853A1

公开(公告)日：2021-09-30

申请号：US17266506

申请日：2019-07-29

Applicant: Hilti Aktiengesellschaft

Inventor： Frederic POL ,  Cristian JIMENEZ ,  Michael ZILTENER ,  Roland SCHNEIDER

IPC: F16B13/14 ,  F16B25/00

Abstract: A method for temporarily releasing a screw anchorage includes unscrewing and removing a primary screw having a thread that is tappingly engaged in a mating thread in an ungrouted hole in a mineral substrate from the ungrouted hole. Subsequently to the unscrewing and removing, a retrofitting screw is screwed into the hole to form an annular gap between the retrofitting screw and the mineral substrate. A hardenable grout is placed in the annular gap and the hardenable grout is hardened in the annular gap.

公开(公告)号：US20210310963A1

公开(公告)日：2021-10-07

申请号：US17263075

申请日：2019-07-15

Applicant: Hilti Aktiengesellschaft

Inventor： Frederic POL ,  Cristian JIMENEZ ,  Michael ZILTENER ,  Roland SCHNEIDER ,  Alexander CLAUS

IPC: G01N21/954 ,  F16B25/00

Abstract: A method for rating a fastener arrangement that includes a mineral substrate having a hole and a screw which is disposed in the hole, includes unscrewing the screw out of the hole, following the unscrewing, optically inspecting the hole for presence or absence of grout in the hole, and rating the hole as satisfactory when grout has been optically detected in the hole and rating the hole as unsatisfactory when grout has not been optically detected in the hole.

公开(公告)号：US20210285848A1

公开(公告)日：2021-09-16

申请号：US17263061

申请日：2019-07-15

Applicant: Hilti Aktiengesellschaft

Inventor： Frederic POL ,  Cristian JIMENEZ ,  Michael ZILTENER ,  Roland SCHNEIDER ,  Alexander CLAUS

IPC: G01M99/00 ,  B25B23/14 ,  F16B25/00

Abstract: A method for rating a screw which is disposed in a hole in a concrete or masonry substrate includes applying a screw torque to the screw, measuring motion data of the screw in response to the applied screw torque, and rating the screw as either satisfactory or unsatisfactory on a basis of the measured motion data.