US 12,253,101 B2
Self-drilling expanding anchor bolt
Gaisheng Koh, Shanghai (CN); Liang Lu, ZJ (CN); and Linda Xu, Shanghai (CN)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 18/009,627
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Jun. 16, 2021, PCT No. PCT/EP2021/066245
§ 371(c)(1), (2) Date Dec. 9, 2022,
PCT Pub. No. WO2022/002592, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 202010614658.7 (CN), filed on Jun. 30, 2020.
Prior Publication US 2023/0220863 A1, Jul. 13, 2023
Int. Cl. F16B 13/06 (2006.01); F16B 13/00 (2006.01)
CPC F16B 13/065 (2013.01) [F16B 13/002 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A self-drilling expanding anchor bolt and a drilled hole, comprising:
a drill bit for drilling;
an anchor rod connected to the drill bit;
an expanding sleeve surrounding the anchor rod, the anchor rod having an expansion cone at a first end adjoining the drill bit, having a neck region behind and contiguous with the expansion cone, and having a threaded segment at a second end of the neck region remote from the drill bit, the expansion cone expanding the expanding sleeve in a radial direction when the expansion cone is pulled into the expanding sleeve; and
a transition part between the drill bit and the expansion cone of the anchor rod, a maximum diameter of the transition part being smaller than a diameter of the drill bit;
wherein the transition part has a truncated cone shape, with a sloping surface of the truncated cone shape expanding from the expansion cone of the anchor rod towards the drill bit.