SCREW-TYPE SPACING BRACE Russian patent published in 1994 - IPC

FIELD: weight moving mechanisms. SUBSTANCE: spacing brace has a drive unit with balanced engine, having lowered built-in of blades, and a rotor with a central opening, set on a cylindrical surface of a nut of a percussion-rotation mechanism. The rotor of the engine is in continuous engagement with a striker of the percussion-rotation mechanism. Telescopic arrangement of screws and their different pitch values allow to provide large motion values at small axial dimension of the spacing brace. The spacing brace has a protection from jamming of screws in their drawn together position due to using of the elastic disc 55 and the metallic disc 56, arranged in a cylindrical cavity of one screw 14 with possibility of engagement of the metallic disc with an end of the second screw 13 and of the elastic disc-with a rod, engaging the adjustment screw 53, placed in a threaded hole of the first screw. EFFECT: enhanced structure. 3 cl, 6 dwg