Anchor bolt with a bevelled tooth expansion core to reduce friction
AssigneeSociete De Prospection Et D'Inventions Techniques Spit
InventorsAlain Gauthier, Jean-Paul Barthomeuf
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Abstract
An anchor bolt comprises a fixing rod (1), an expandable sleeve (2) and an expansion core (3) integral in translation with the fixing rod (1), intended to expand the sleeve (2). The sleeve (2) has a plurality of slots (9,9′) widening towards the free end of the sleeve (2), forming a plurality of expansion teeth (18-20) cooperating with the expansion core (3). The inner wall of the edge of the teeth (18-20) is blunt and the thickness of each tooth is bevelled to decrease towards the free end of the sleeve.
Claims6
An anchor bolt, comprising a fixing rod (1), an expandable sleeve (2) mounted on the fixing rod (1) and an expansion core (3) integral with the fixing rod (1) and moveable therewith to expand the sleeve (2), said sleeve (2) including at least one slot (9,9′) with a portion thereof widening towards a free end of the sleeve (2) and thereby forming at least one expansion tooth (18-20) contactable with the expansion core (3), wherein an edge (10) of an entire inner peripheral wall (11) of the tooth (18-20) from the widening portion of the slot terminating at the free end is bevelled and a thickness of the tooth (18-20) decreases towards said free end of the sleeve (2).
Dependencies are inferred from the claim text.