LAMINATED WASHER Russian patent published in 2000 - IPC

FIELD: mechanical engineering; fasteners for metal structures. SUBSTANCE: proposed washer has at least two layers in cross section. At least part of section boundary line, on boundary of outer and/or inner of at least one of layers, is made in form of fragment of oblique conical section of straight round cone. Invention provides directivity of strength properties of washer built in by design, with due account of its work in bend and shear, increased efficiency of locking against self-loosening if hardening compound is placed between but body and part owing to creating areas with increased working surfaces and ensures identification of manufacturer. EFFECT: enhanced reliability of fastening. 21 cl, 16 dwg