PNEUMATIC TIRE BUILDING DRUM Russian patent published in 2003 - IPC

FIELD: tire industry+ADs- tire building drums. SUBSTANCE: proposed tire building drum includes movable parts: sectors, hubs and levers with articulation holes forming kinematic pairs whose members are outer surface of axles and inner surface of bushes of the same radius embracing cylindrical surface of axles. Mounted at interference fit in each articulation hole is cylindrical housing whose inner surface is element of fixed joint with bush. Dry slip bush mounted in housing has thickness of housing wall of (1.5-2)S, where S is thickness of dry slip bush wall. Besides that, cylindrical housing has bead whose side surface is provided with seat made in form of circular bore for receiving dry slip bush. EFFECT: increased service life+ADs- ease in maintenance. 2 cl, 2 dwg