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A blow-molded wheel including an axle retainer assembly. The retainer assembly includes a housing having transverse sleeves that support an axle and a spring biased retainer pin that mounts to an annular groove at the axle. The housing is supported in a cavity formed into a wheel spoke and a bore of

A blow-molded wheel including an axle retainer assembly. The retainer assembly includes a housing having transverse sleeves that support an axle and a spring biased retainer pin that mounts to an annular groove at the axle. The housing is supported in a cavity formed into a wheel spoke and a bore of a wheel hub and is retained upon the shrinkage of the plastic around the housing. An aperture of the pin sleeve facilitates retraction of the pin and release of the wheel from the axle.

대표청구항 ▼

1. A molded plastic wheel adapted to mount to an axle, comprisinga) an annular body that is integrally molded from a first material exhibiting a first density and that includes a hollow hub having an axle bore and a plurality of hollow spokes that radially extend from said hub to a hollow box define

1. A molded plastic wheel adapted to mount to an axle, comprisinga) an annular body that is integrally molded from a first material exhibiting a first density and that includes a hollow hub having an axle bore and a plurality of hollow spokes that radially extend from said hub to a hollow box defined by planar first and second side wall surfaces that extend from said spokes and orthogonal to a peripheral tread surface that extends parallel to said axle bore, wherein hollow cavities of said hub, said spokes and said box communicate with each other; b) retainer means mounted in said axle bore for securing the wheel to the axle and comprising a retainer housing that includes i) an external surface adapted to mount in said axle bore without rotating, ii) a pin bore having first and second open ends and wherein said first open end communicates with said axle bore and said second open end abuts a wall surface displaced from said tread surface, iii) a pin mounted in said pin bore, and iv) a resilient member abutting the displaced wall surface for biasing the pin for reciprocating movement relative to the axle bore; and c) an annular tread piece separately molded from a second material exhibiting a second density different from the first material and having a channel shape with first and second side pieces that project orthogonal to a connecting tread band and wherein said tread piece is mounted over said box such that said tread band overlies said tread surface and said first and second side pieces abut said first and second side wall surfaces.