US 12,012,985 B2
Expansion anchor
Xiaolong Chu, Guilin (CN); Xingda Hu, Irving, TX (US); Marc Schaeffer, Altendorf (CH); and Cheng Lin, Jinshawan (CN)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 17/641,344
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Sep. 3, 2020, PCT No. PCT/EP2020/074625
§ 371(c)(1), (2) Date Mar. 8, 2022,
PCT Pub. No. WO2021/047995, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 201910864034.8 (CN), filed on Sep. 12, 2019.
Prior Publication US 2022/0341452 A1, Oct. 27, 2022
Int. Cl. F16B 13/04 (2006.01); F16B 13/06 (2006.01)
CPC F16B 13/068 (2013.01) 9 Claims
OG exemplary drawing
 
1. An expansion anchor, comprising:
a bolt;
a spacer sleeve;
an expansible sleeve;
an expanding member; and
a collar, wherein the collar is disposed between the expansible sleeve and the spacer sleeve;
wherein the bolt is insertable into the spacer sleeve, the collar, and expansible sleeve in sequence and wherein a thread of the bolt at a leading end of the bolt is connected to the expanding member to draw the expanding member into the expansible sleeve and expand the expansible sleeve radially;
wherein the collar is formed by a first material with a first hardness and a second material with a second hardness wherein the first hardness is different from the second hardness;
wherein the first material forms an inner part of the collar and the second material forms an outer part of the collar;
wherein the first hardness of the first material is higher than the second hardness of the second material.