Insulation seal for inspection holes

Details Insulation seal for inspection holes Insulation seal for inspection holes

1989-12-11

1991-05-14

Marcus, Stephen

Bottles and jars

Closures

Stopper type

220352, 220661, 220DIG19, 138 89, 138 90, B65D 3900

Patent

active

050148664

ABSTRACT:
A simplified installation method is provided in this improved insulation seal for inspection holes. The sealing assembly consists of a compressible elastomeric flanged hollow sleeve which is first inserted into the inspection hole. A rigid metal cup-shaped plug then inserted into the sleeve forms tight weatherproof seals in downward and outward directions against the insulation jacket. No special installing tools are needed and the seal is adaptable to severely corrugated, or other non-flat, insulation jackets. Primary exposure of the metal plug protects the assembly against sand blasting and other external wear. The seal is easily removed for reuse upon later inspections.

REFERENCES:
patent: 3073473 (1963-01-01), Davidson
patent: 3207184 (1965-09-01), Lambert
patent: 3451583 (1969-06-01), Lee, II
patent: 3658096 (1972-04-01), Higuera
patent: 3827462 (1974-08-01), Celesta
patent: 3828968 (1974-08-01), Kask
patent: 3964339 (1976-06-01), Antonio et al.
patent: 4091842 (1978-05-01), Greenawalt et al.
patent: 4170247 (1979-10-01), Bates

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