Expansion anchor
AssigneeHilti Aktiengesellschaft
InventorsXiaolong Chu, Xingda Hu, Marc Schaeffer, Cheng Lin
Life of this patent
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Abstract
An expansion anchor includes a bolt, a spacer sleeve, an expansible sleeve, an expanding member, and a collar where the collar is disposed between the expansible sleeve and the spacer sleeve. The bolt is insertable into the spacer sleeve, the collar, and expansible sleeve in sequence and 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. The collar is formed by a first material with a first hardness and a second material with a second hardness where the first hardness is different from the second hardness.
Claims9
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.
Dependencies are inferred from the claim text.