Abstract: In a pocket-type chain wheel comprising two groups of pockets (3) for chain links (10) of a chain strand which pass through the wheel at an angle ? relative to the wheel axis (8), said groups of pockets (3) being disposed next to and offset from each other, the angle ? is determined exclusively by the material diameter d and the internal width bi of the chain links (10) at a given number of teeth of the wheel in that it is ensured that the contact between the chain links (10) and the pockets (3) is limited to the area of the flanks of the teeth.

Abstract: The invention provides a high-strength steel that has excellent ductile fracture values J integral even at low temperatures, so the risk of the component, which is produced in each case from the steel, breaking is reduced to a minimum even under unfavourable, hard operating conditions. This is achieved in that it contains (in % by weight) 0.08 to 0.25% C, 0.10 to 0.30% Si, 0.80 to 1.60% Mn,=0.020% P,=0.015% S, the sum of the P and S content being=0.030%, 0.40 to 0.80% Cr, 0.30 to 0.50% Mo, 0.70 to 1.20% Ni, 0.020 to 0.060% Al, 0.007 to 0.018% N,=0.15% V,=0.07% Nb, the sum of the V and Nb content being=0.020% and the remainder being iron and inevitable impurities. The steel according to the invention is particularly suitable for the manufacture of high-strength chains.

Abstract: According to the invention, the resistance of the links of a D-profile chain may be increased, whereby the transitions between the flanks (2, 3) and the outer planar bearing surfaces of the links comprise roundings of radius r, which is 0.2 to 0.4 times the value of the separation (A) between the flanks of the chain links.

Abstract: A chain, a chain wheel and a chain transmission for a lifting gear in accordance with the present invention increases the dynamic resistance of a round steel chain that is primarily intended for use in combination with a lifting gear. The chain members (5, 6) are locally deformed plastically in the area of their braces (9, 10) so as to form flat lateral zones (11).

Abstract: According to the invention, the resistance of the links of a D-profile chain may be increased, whereby the transitions between the flanks (2, 3) and the outer planar bearing surfaces of the links comprise roundings of radius r, which is 0.2 to 0.4 times the value of the separation (A) between the flanks of the chain links.

Abstract: The invention relates to a chain, a chain wheel and a chain transmission for lifting gear. The aim of the invention is to increase the dynamic resistance of a round steel chain that is mainly intended for use in combination with lifting gear. To this end, the chain members (5, 6) are locally deformed plastically in the area of their braces (9, 10) in such a manner that they have flat lateral zones (11).