GB803873A - Rim structure - Google Patents

Abstract

803,873. Wheel rims. GOODYEAR TIRE & RUBBER CO. April 24, 1956 [Oct. 31, 1955], No. 12485/56. Class 144 (2). A rim assembly for tubeless tyres comprises an annular rim base 1 having at one side a tapered tyre bead seat 9 terminating in a radially outwardly extending integral side ring retaining flange 5, a detachable side ring 7 defining an annular chamber 27 with a cylindrical seating 6 on the rim base adjacent the flange 5, an annular gutter 10 around the other side of the rim base 1 receiving a split locking ring 22 which locates and retains on the rim base an endless detachable tapered bead seat ring 12, an annular groove 11 in the rim base 1 adjacent to, but spaced laterally inwardly of, the gutter 10 and defining with the radially inner surface of the bead seat ring 12 an open-sided chamber 21, and a second detachable side ring 24 retained by an integral flange 13 on the detachable bead seat and defining, with a cylindrical seating 15 on the bead seat ring 12 adjacent its flange 13, a second annular chamber 28, there being resilient deformable sealing rings 29, 30, 31 in the chambers 27, 28, 21 respectively which are subjected to axial and radial distortion in the assembled state of the rim thereby to seal the gaps between the rim parts. As shown, the rim base may comprise three rolled and welded sections 2, 3, 4, and the bead seat ring 12 may have a recessed undersurface to provide a shoulder 19 to engage and distort the sealing ring 31 when the ring 12 is moved, on tyre inflation, in bevelled mating engagement with the locking ring 22. To facilitate retention of the sealing rings 29, 30, grooves 8 and 16 may be provided in the seatings 6 and 15 respectively to co-operate with recesses 25, 26 in the 'associated side rings 7, 24 and form the chambers 27, 28. Reference has been directed by the Comptroller to Specifications 744,085 and 770,378.