Seal device for ferromagnetic containers

Details Seal device for ferromagnetic containers Seal device for ferromagnetic containers

1993-12-07

1994-10-18

Avila, Stephen P.

Ships

Leak stoppers

Aprons, mats, etc.

B63B 4316

Patent

active

053558243

ABSTRACT:
A temporary seal or patch assembly prevents the escape of contents, e.g., fluids and the like, from within a container having a breach therethrough until the contents can be removed and/or a repair effected. A frame that supports a sealing bladder can be positioned over the breach and the frame is then attached to the container surface, which must be of a ferromagnet material, by using switchable permanent magnets. The permanent magnets are designed to have a first condition that is not attracted to the ferromagnetic surface and a second conditions whereby the magnets are attracted to the surface with sufficient force to support the seal assembly on the surface. Latching devices may be attached to the frame and engage the container surface with hardened pins to prevent the lateral movement of the seal assembly along the container surface from external forces such as fluid drag or gravity.

REFERENCES:
patent: 770078 (1904-09-01), Kruger
patent: 3094964 (1963-06-01), Witten et al.
patent: 3669055 (1972-06-01), Buce
patent: 4161155 (1979-07-01), Cloutier
patent: 5025972 (1991-06-01), Finlan
patent: 5036786 (1991-08-01), Uri
patent: 5165356 (1992-11-01), Williams
patent: 5279092 (1994-01-01), Williamsen et al.

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