Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1985-11-25
1987-07-28
Echols, Percy W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29129, 301 63PW, 34108, B21B 3100
Patent
active
046823930
ABSTRACT:
A roller for supporting the rotating drum of a clothes drier or similar appliance includes a hub which is molded from a suitable polymer and a rubber tire which fits around and is interlocked with the hub. The tire is of uniform cross-sectional configuration and is stressed so that it remains in intimate contact with the hub rim, even after substantial use. To manufacture the roller, the tire, which is molded in a separate operation, is placed in a mold cavity that is configured to seal against the side walls of the tire and yet permit the tire to expand radially, maintaining the seals along the tire side walls throughout the expansion. Once the mold is closed, a polymer in a plastic state is injected into the region of the cavity surrounded by the tire, there being enough polymer forced into the mold to expand the tire radially against an outer surface of the cavity. The expansion of the tire exceeds the shrinkage that the polymer experiences upon cooling and assuming a rigid state, and as a consequence the tire remains stressed and in intimate contact with the hub.
REFERENCES:
patent: 2665521 (1954-01-01), Ford
patent: 3452798 (1969-07-01), Ravreby
patent: 3578812 (1971-05-01), Taussig et al.
patent: 3849220 (1974-11-01), Suzuki et al.
patent: 3952786 (1976-04-01), Kreling et al.
patent: 4387070 (1983-06-01), Cunard et al.
patent: 4444435 (1984-04-01), Honsa
Arundale, Inc.
Echols Percy W.
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