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Drum for tire assembly

  • US 6,000,454 A
  • Filed: 12/08/1995
  • Issued: 12/14/1999
  • Est. Priority Date: 12/19/1994
  • Status: Expired due to Fees
First Claim
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1. Drum for building a tire, having a central shaft mountable on a mandrel holder, comprised of:

  • two plates mounted at axially spaced positions and slidable on the central shaft relative to each other;

    on each plate, a group of rods, each rod having on one side an axis of articulation and on the other side a head, the axis of articulation of each rod of a group being mounted on the respective plate in such a way that said axes of articulation are all included in the same plane perpendicular to the axis of said central shaft, and equidistant from said central shaft;

    means for controlling the pivoting of said rods around their axis of articulation, between a retracted position and a building position, said building position of the rods in each of the plates being symmetrical from one plate to the other;

    in each group, a sleeve covering all of the rods of said group, each sleeve being anchored on a respective plate so that the rods are enclosed in the sleeve and in such a way as to define, for said group, an airtight enclosure; and

    means to selectively connect each enclosure to a vacuum source.

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