Oil seal ring of synthetic resin having angularly displaced injection point
AssigneeNtn Corporation
InventorKozo Kakehi
Life of this patent
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Abstract
A seal ring having uniform dimensions and uniform composition over the entire length thereof. This is achieved by properly positioning the injection point for injecting a material when injection-molding the seal ring. More specifically, the injection point is angularly displaced from the center of the entire length of the seal ring by .+-.1.degree. to .+-.30.degree..
Claims3
An oil seal ring of a synthetic resin having two separate, opposite ends and formed by injection-molding a synthetic resin, said seal ring having an injection point for injecting a material located at a position angularly displaced by .+-.1.degree. to .+-.30.degree. from the center of the entire length of said seal ring.
Dependencies are inferred from the claim text.