METHOD OF BOLT MANUFACTURE AND BOLT Russian patent published in 2003 - IPC

FIELD: hardware, particularly, lock bolt. SUBSTANCE: lock bolt has head and shank. Head is made in form of separate bodies of revolution with annular grooves. Shank is made in form of separate parallel rods and locking members. Rods are located between locking members and form left-hand and right-hand guides. Left-hand guide is made of two rods, and right-hand guide of one or two rods. Bodies of revolution are kinematically connected by means of annular grooves to left-hand guide and installed for motion along the latter and turning round its axis. EFFECT: higher resistance to breakage. 2 cl, 4 dwg