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Tire and wheel rim assemblies

  • US 4,351,382 A
  • Filed: 12/02/1980
  • Issued: 09/28/1982
  • Est. Priority Date: 12/06/1979
  • Status: Expired due to Term
First Claim
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1. A tire and wheel rim assembly comprising a tire having a tread portion connected at each edge to a respective one of a pair of sidewalls each terminating at its radially inner edge in an annular tire bead, each tire bead having a substantially inextensible bead reinforcement and a one-piece wheel rim having a tire fitting well between a pair of axially spaced bead seats on each of which a respective one of said tire beads is seated, each bead seat being tapered at an angle of about 5°

  • in an axially and radially outwards direction with respect to the rotational axis of said rim and terminating at its radially outer edge in a respective tire bead retaining flange, one of said bead seats being substantially straight and having adjacent to the axially inner edge thereof an abutment extending circumferentially around said bead seat, said abutment being substantially continuous and having a height of at least 2.2 mm and a maximum diameter not greater than the minimum diameter of said bead reinforcement to allow fitment of said tire by passage of the associated tire bead outwards over said abutment and a generally radially extending axially outwardly directed abutment face to engage the toe of said associated tire bead, said abutment face having a maximum radial dimension with respect to the width and the taper angle of the adjacent bead seat such that under the action of road generated forces rotation of said tire bead about said abutment is effected to retain said tire bead at said bead seat.

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