SHAPE OF PROFILE FOR CRANE SECTION Russian patent published in 2013 - IPC B66C23/687 

FIELD: transport.

SUBSTANCE: invention relates to crane section. Crane section comprises lengthwise axis and imaginary contour line extending in crosswise plate, approximately, in reflection symmetry about axis (s) of symmetry. Contour line has circular arc section (k₁) located between axis (s) of symmetry at equal distance from first and second points (S₁ and S₂) of interaction by medium point M and first point S₁, whereto adjoins first rectilinear section in direction of second point S₂ of intersection along tangential line, its imaginary extension in direction of second point S₂ intersects axis of symmetry (s) to make acute angle therewith. Second rectilinear section (g₂) extending from said axis of symmetry to make angle smaller than 90 degrees therewith at first point S₁ inside area enclosed by contour line and to adjoin along tangential line circular arc section (k₁).

EFFECT: perfected crane section.

24 cl, 11 dwg