IMPACT EXPANSION BOLT (VERSIONS) Russian patent published in 2004 - IPC

FIELD: civil engineering. SUBSTANCE: invention relates to expansion bolts designed for fastening outer insulation of any type to concrete part or brickwork. Proposed expansion bolt has body made of high-strength composite material, plastic expansion sleeve, and shell either cylindrical or tapering to front end, on side surface of which splines are made. According to first design version, expansion sleeve is provided with sharpened unidirectional tenons made of flexible material and secured on inner surface of sleeve. Tenons are inclined to side of body movement when expanding the sleeve. According to other design version, body is provided with sharp unidirectional tenons made of flexible material and arranged on expansion part of body, tenons being inclined to side opposite to direction of body movement at expanding the sleeve. EFFECT: improved reliability of adhesion of sleeve and body. 3 cl, 5 dwg