Tdw Delaware, Inc.

Robert Fulton Hendricks

Joseph Alan Morton

Roger L Poe

Joshua Dean Mitchell

William C Keenan

Aaron M Ritchie

Samuel R Boehning

William J Tefft

Joshua Mitchell

William Keenan

William Tefft

A closure [] for a cylindrical vessel includes at least one holding means [] configured to move the closure into a fully closed state, the holding means having a predetermined actuation force or torque to properly close the closure, the closure including one or both of the following failsafe failure detection features: a mechanical fuse [] having a predetermined load failure force below that of a load failure force of at least one component of the holding means and above that of a predetermined actuation force or torque to properly close the closure; or a block[] sized to at least partially overlap a pressure warning lock hole [] of the closure door when the closure is not in the fully closed state and to fully expose the pressure warning lock hole when the closure is in the fully closed state, thereby permitting insertion of a pressure warning lock [

Vessel closure device with fail safe failure detection means

A pigging device of this disclosure includes a wear indicator configured to visually indicate an amount of material loss of a pipe wall contacting surface. The material loss may be symmetrical or asymmetrical. The pipe wall contacting surface may be any shape suitable, including but not limited to spherical-shaped, cylindrical-shaped, cup-shaped, disc-shaped, conical-shaped, frusto-conical shaped, bowl-shaped, and bullet-shaped. In some embodiments, the pigging device is a pipeline pig such as but not limited to a spherical foam pig, cylindrical-shaped foam pig, or a bullet-shaped foam pig. In other embodiments, the pigging device is a component of a pipeline pig such as but not limited to a cup or disc arranged about a body of the pipeline pig. The pigging device may also be a pigging disc element. The pigging device may be made of any suitable material, including but not limited to an elastomer such as urethane.

Wear indicator for use with pipeline pig components having a pipe wall contacting surface

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Tulsa, OK, United States of America

Robert Fulton Hendricks