SCREWDRIVER Russian patent published in 1998 - IPC

FIELD: instrument making. SUBSTANCE: screwdriver has an elongated body with a longitudinal through hole, stem with a blade installed in it, having an axial duct communicating with the longitudinal hole of the body. A pusher is installed in the body longitudinal hole on the opposite side of the stem with the blade for restricted helical motion in the body. A rod is positioned between the ends of the stem with the blade and pusher facing each other for longitudinal motion and fixing of the pusher in the axial space, it is spring-loaded by a flexible member relative to it towards the stem with the blade. A torsion bar passes through the axial duct of the stem with the blade and is fixed with one end on the rod, and the other end is flat for fixing the fastener on the blade. The torsion bar may be made in the form of a tube with a flattened end, and longitudinal slots are provided in the pusher, communicating with its cavity and engageable with the tube end. EFFECT: improved design. 3 cl, 4 dwg