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US 5,047,108 AGranted
Tire building drum for fabricating high profile type tire carcasses
AssigneeWyko Corporation
InventorMark S. Byerley
Life of this patent
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AssigneeWyko Corporation
InventorMark S. Byerley
Estimating the term…
The invention is directed to radially collapsible tire building drum assembly which is provided with heavy undercut bead assemblies for the fabrication of tire carcasses, particularly those of multiple bead construction as utilized in high profile tires such as required for heavy trucks, earth movers, and aircraft. The foldable bead ring assembly of the present invention is provided with a plurality of circumferential or arcuate ring segments each supported by a drum segment. In the preferred embodiment, alternately disposed ring segments are provided with pivotable end sections which are pivoted out of the way during the drum collapsing operation to provide recesses for receiving outer end portions of adjacent ring segments. Simultaneously, with this reception of the outer end portions of the adjacent ring segments in the recesses the pivoted end sections are received in receptacles behind the adjacent bead ring segments. This intermeshing or folding of the ring segments during the radial collapse of the drum enables the drum to be radially displaced into a fully collapsed state while retaining the bead rings fixedly attached to the drum assembly.
A collapsible tire building drum comprising segmented sleeve means rotatable about an axis of rotation, an elongated cylindrical drum means circumferentially disposed about said sleeve means and comprising a plurality of elongated axially extending drum segments, collapsible means coupled to each of said drum segments and to said sleeve means for collapsing said drum segments toward said axis or expanding said drum segments away from said axis to define the cylindrical drum means, and bead seating ring means supported by opposite longitudinal ends of said drum segments and projecting radially inwardly from the drum segments toward said axis, said ring means each comprising a plurality of curved ring segments disposed in a contiguous end-to-end relationship to one another and with at least one ring segment having an end portion thereof pivotably attached thereto for defining recess means therein of a size sufficient for receiving an outer end portion of a drum segment and its supported ring segment disposed adjacent to said at least one ring segment during the collapsing of said drum segments toward said axis, said supported ring segment having receptacle means therein for receiving the pivotably attached end portion of said at least one ring segment during the collapsing of said drum segments towards said axis.
The collapsible tire building drum as claimed in claim 15, wherein each of said fay surfaces are oriented along two oblique angles, wherein the two angles at each fay surface intersect at substantially the radial center of the ring segments, and wherein the radially innermost oblique angles have a point of intersection located radially outwardly from a point of intersection of the radially outermost oblique angles.
Dependencies are inferred from the claim text.