Injection molded synthetic wheel

Details Injection molded synthetic wheel Injection molded synthetic wheel

1984-03-14

1987-01-27

Scherbel, David A.

Land vehicles: wheels and axles

Wheel

Compression wheel

301 65, B60B 504

Patent

active

046390464

ABSTRACT:
A wheel of synthetic material for bicycles and the like. The wheel includes a rim, a plurality of spokes, and a hub, and is made in one piece by means of injection molding at the hub. Between each two adjacent spokes, the rim has a wall element which extends in the circumferential direction of the rim, extends from the connection location of each spoke on the rim to the middle of the rim portion between two spokes, and is rheologically designed as a preliminary flow cross-sectional area such that preliminary flows of the synthetic material enter the wall element from both spokes and flow more quickly from the two spoke connection locations to the middle of the rim portion than the two circumferential flows of synthetic material which advance in the remaining rim walls. This prohibits the two circumferential flows in the remaining rim walls from meeting at the middle of the rim portion and forming a cold flow seam which would considerably reduce the strength of the rim at this central rim portion.

REFERENCES:
patent: 680332 (1901-08-01), Kightlinger
patent: 4289186 (1981-09-01), Wilde
Plastics Engineering Handbook--1976, The Society of the Plastics Industry Inc., fourth edition.

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