초록 ▼

A take-apart wheel rim and disc assembly for use in a safety tire and wheel assembly which includes a pneumatic tubeless tire. The wheel includes an inboard rim part, a wheel mounting disc having an outer marginal flange telescoped into and secured to the inboard rim part, the disc flange having an

A take-apart wheel rim and disc assembly for use in a safety tire and wheel assembly which includes a pneumatic tubeless tire. The wheel includes an inboard rim part, a wheel mounting disc having an outer marginal flange telescoped into and secured to the inboard rim part, the disc flange having an outer surface protruding axially outboard beyond and clear of the inboard rim part. An outboard rim part telescopically received from an axially outboard direction over the disc flange, an O-ring seal disposed between the disc and opposing surfaces of the inboard and outboard rim parts, and a clamp ring for axially clamping the outboard and inboard rim parts together with the O-ring captured in compression between the disc and the opposing surfaces of the rim parts to seal against air leakage. The disc has an air bleed vent structure outboard of the O-ring and normally sealed from the tire cavity by the O-ring. The clamp ring and associated fasteners engage and exert clamping stress on the outboard rim part over a range of relative movement therebetween in the axial direction relative to the inboard rim part which is sufficient to permit loss of sealing pressure at the O-ring prior to loss of clamping engagement to thereby permit air leakage past the O-ring through the air bleed vent structure to atmosphere within the range of relative movement.

대표청구항 ▼

A wheel rim and disc assembly for use in a safety tire and wheel assembly which includes a pneumatic tubeless tire, said wheel rim and disc assembly comprising: an inboard rim part including a rim base and an inboard tire bead retaining flange integrally carried at an inboard edge of said rim part,

A wheel rim and disc assembly for use in a safety tire and wheel assembly which includes a pneumatic tubeless tire, said wheel rim and disc assembly comprising: an inboard rim part including a rim base and an inboard tire bead retaining flange integrally carried at an inboard edge of said rim part, said inboard rim part having a cylindrical band terminating at an outboard free edge of said rim base remote from said inboard flange of said inboard rim part, a wheel mounting disc having a central wheel mounting portion and an outer marginal flange telescoped into and secured to said cylindrical band, said disc flange having an outer surface protruding axially outboard beyond and clear of said inboard rim part free edge, an outboard rim part comprising demountable flange means including a cylindrical hoop adapted to be telescopically received from an axially outboard direction over said disc flange outer surface and an outboard tire bead retaining flange integrally projecting from an outboard edge of said hoop, said hoop terminating at an inboard free edge, annular resilient sealing means disposed between said outer surface of said outer marginal flange of said disc, said inboard free edge of said hoop of said outboard rim part and said rim base band free edge of said inboard rim part, and means for axially clamping said outboard rim part on said inboard rim part with said sealing means being captured in compression between said free edges and said outer surface of said disc flange so as to seal against air leakage from the internal cavity of a tire mounted on said wheel rim and disc assembly, said disc having air bleed means outboard of said sealing means and normally sealed from the tire cavity by said sealing means, said clamping means being constructed and adapted to engage and exert clamping stress on said outboard rim part over a range of relative movement therebetween in the axial direction of said inboard rim part which is sufficient to permit loss of sealing pressure at said sealing means prior to loss of clamping engagement at said clamping means to thereby permit air leakage past said sealing means through said air bleed means to atmosphere within said range or relative movement, said outer surface of said disc flange comprising a generally cylindrical first sealing surface, said outboard free edge of said rim part having a second sealing surface inclined radially inwardly and in an inboard direction relative to the wheel axis, and said outboard rim part inboard edge having a third sealing surface inclined radially inwardly in an outboard direction relative to the wheel axis, said first, second and third sealing surfaces when juxtaposed to sealably compress said sealing means thereby defining an annular cavity which in radial cross-section generally defines a triangle, said sealing means being bodily movable along said first sealing surface axially of said wheel assembly by tire internal cavity air pressure upon mutual separation of said second and third sealing surfaces in response to said relative separational movement of said rim parts.