BOLT Russian patent published in 2001 - IPC

FIELD: mechanical engineering. SUBSTANCE: bolt mounted into threaded opening contains lengthened hollow rod (1) provided with thread on its one end and with additional member (2) made of rod provided with thread on its one end. Internal surface of rod (1) is provided with larger and smaller diameter and coaxial to the external thread. The smaller diameter is at the face end of the rod which is made of member of ratchet connection. The ratchet connection transmits rotary motion from the lengthened hollow rod to the additional member when screwing the bolt. The surface located between surfaces of the internal cavity is made of member of ratchet connection and transmits rotary motion from the lengthened hollow rod to the additional member when unscrewing the bolt. The additional member fits in the lengthened hollow rod in such way that its thread becomes continuation of rod (1) thread in interaction between members of the ratchet connection of the external face end of the lengthened hollow rod and the additional member. The second end of the additional member is made of stepped rod interacting by its side surfaces with stepped surface of rod (1). EFFECT: expanded technological resources. 2 cl, 1 dwg