LAMINATED WASHER Russian patent published in 2000 - IPC

FIELD: mechanical engineering; fasteners for metal structures. SUBSTANCE: in proposed laminated washer which has at least two layers in cross section, at least part of section boundary line, on boundary of face and/or rear side of at least one of layers and/or on at least one of tops of at least one of section layers, is made in form of fragment and/or combination of fragments of oblique conical section of straight round cone. Invention provides directivity of strength properties of washer with due account of its work in bend and shear, increased efficiency of locking against self-loosening if hardening compound mass is placed between nut body and part and ensures identification of manufacturer. EFFECT: enhanced reliability of fastening. 24 cl, 21 dwg