THREADED JOINT Russian patent published in 2012 - IPC F16B39/00 

FIELD: machine building.

SUBSTANCE: proposed joint has tightening threaded element with hole receiving locking element, nut, spring washer and body to be tightened. Nut seat has saw teeth with inclined top wall and vertical cut made along radius on site with larger-diameter equal to or slightly exceeding that of spring washer. Width of inclined top wall of saw teeth equals height of spring washer while tooth vertical cut equals Vt.=gs.=1.618 mm, where gs. is golden section from 1 mm. Spring washer features vertical or skewed cut made over its entire thickness while left and right ends of said washer have angles of sharpening directed in opposite sides relative to each other. Said angles equal incidence angle between tooth top wall and its vertical cut. Their heights are equal but smaller than that of spring washer by golden section from 1 mm. Circular way similar to that of saw teeth ob nut seat is made on body to be tightened. Top and bottom faces of spring washer left and right ends are parallel.

EFFECT: increased friction forces, higher reliability.

2 dwg