Closure plug for castings

Details Closure plug for castings Closure plug for castings

1988-06-10

1989-03-28

Hall, George T.

Receptacles

Closures

Removable closure retained by adhesive or fusion means

220307, 220233, 220DIG19, B65D 4304, B65D 4308

Patent

active

048156299

ABSTRACT:
A two-element plug having an elastomeric body and a nonsealing retainer molded within the elastomeric body, the retainer having gripping edges which springingly engage portions of the hole walls to maintain the plug body in place, even against a rough as-cast surface having a draft angle. Discontinuities are formed in the gripping edge periphery through the use of scallops and the gripping edge periphery extends beyond the elastomeric periphery to promote better engagement of the walls of the aperture. When used with noncircular holes having rounded corner portions, the retainer is truncated in the corner portions.

REFERENCES:
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patent: 3146748 (1964-09-01), Knocke
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patent: 3269582 (1966-08-01), Knocke
patent: 3448772 (1969-06-01), Delamater
patent: 3451583 (1969-06-01), Lee, II
patent: 3578027 (1971-05-01), Zoffi
patent: 4202463 (1980-05-01), Mogler
patent: 4287996 (1981-09-01), Wanderer
patent: 4736865 (1988-04-01), Rericha

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