Patent ID: 7966908

Claim:
A self-blocking differential for a transportation means, comprising a drive housing, half-axial elements associated with half-axes, said half-axial elements disposed in said housing coaxially to each other, the external surfaces of said half-axial elements provided with helical grooves of opposite spiral directions; at least one closed-loop channel disposed in said housing, said at least one channel has an active branch and a reverse branch joined by two straight-line branches at a right angle, said active, reverse and two straight-line branches have a cross-section; and an odd number of rolling members in the form of balls filling said channel in a chain manner, said balls each has a predetermined diameter fitting into the cross-section of said branches, a portion of said channel is made open for insertion of segments of the balls into the helical grooves; wherein the improvement is characterized in that said channel has a rectangular longitudinal cross-section with rounded external corners and with right angle internal corners.