US 9,810,254 B2
Expansion bolt
Andreas Eckstein, Landsberg am Lech (DE); Mathias Goldt, Feldkirch (AT); Marc Schaeffer, Feldkirch-Nofels (AT); Arjen Detmer Dijkhuis, Feldkirch (AT); and Joerg Appl, Buchs (CH)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 14/412,391
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed Jun. 25, 2013, PCT No. PCT/EP2013/063192
§ 371(c)(1), (2) Date Dec. 31, 2014,
PCT Pub. No. WO2014/005876, PCT Pub. Date Jan. 9, 2014.
Claims priority of application No. 10 2012 211 418 (DE), filed on Jul. 2, 2012.
Prior Publication US 2015/0135511 A1, May 21, 2015
Int. Cl. F16B 13/06 (2006.01); F16B 31/02 (2006.01)
CPC F16B 31/027 (2013.01) [F16B 13/065 (2013.01); F16B 31/028 (2013.01); Y10T 29/4994 (2015.01)] 9 Claims
OG exemplary drawing
1. A method for setting an expansion anchor including an anchor bolt having an expansion section; an expansion sleeve surrounding the anchor bolt and expandable by retracting the expansion section; a spring element situated on the anchor bolt and tensionable by inserting the anchor bolt into a bore hole, the spring element capable of retracing the expansion section of the anchor bolt into the expansion sleeve when tension is subsequently released; and an indicator element indicating when a setpoint tension of the spring element is reached, the method comprising:
providing the bore hole in a substrate;
driving the expansion sleeve of the expansion anchor into the bore hole by applying axial forces to the anchor bolt;
tensioning the spring element of the expansion anchor to the setpoint tension by applying axial forces to the anchor bolt, the indicator element indicating when the setpoint tension is reached; and
retracting the expansion section of the anchor bolt into the expansion sleeve by energy stored in the spring element, so that the expansion sleeve expands radially and anchors the expansion anchor in the bore hole.