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Title: Seal device for ferromagnetic containers

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.
 [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
Regents of University of California, Office of Technology (Alameda, CA) LANL
Patent Number(s):
US 5355824
Contract Number:
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
seal; device; ferromagnetic; containers; temporary; patch; assembly; prevents; escape; contents; fluids; container; breach; therethrough; removed; repair; effected; frame; supports; sealing; bladder; positioned; attached; surface; ferromagnet; material; switchable; permanent; magnets; designed; condition; attracted; conditions; whereby; sufficient; force; support; latching; devices; engage; hardened; pins; prevent; lateral; movement; external; forces; fluid; drag; gravity; conditions whereby; seal assembly; permanent magnet; permanent magnets; lateral movement; ferromagnetic surface; seal device; sufficient force; external forces; temporary seal; assembly prevents; /114/