Dual collar tank cap locking device

A dual collar tank cap blocking device providing a means for the attachment of a lockable blocking device to block a tank fill-port cap from being removed from a tank fill-port nipple, the dual collar tank cap blocking device comprises:

• a) a first collar to partially or fully surround the circumference of the tank fill-port nipple;
• b) the first collar comprising a first means for attachment to attach the first collar to the tank fill-port nipple, resulting in a tight, rigid, and non-movable condition of the first collar around the tank fill port nipple;
• c) the first collar comprising a second means for attachment enabling a secure and removable attachment of the first collar to a lockable blocking device shackle, the first collar second means for attachment position and configuration requires the lockable blocking device shackle to be;
• I) positioned in a first plane, the first plane being perpendicular to a second plane, the second plane being a transverse plane that is parallel with the top surface of the fill port cap, the fill port cap resides in the first plane, the portion of the lockable blocking device shackle protruding through the first collar second means for attachment being higher in altitude than the lowest portion of the fill port cap top surface;
• and
• II) positioned wherein the lockable blocking device cannot interfere with or block the opening of a pressure relief device that may be centered in the top surface of the fill port cap even in the event the lockable blocking device is making contact with the fill port cap top surface, the position of the lockable blocking device shackle being;
• i) in a third plane and orientated lengthwise aligned and non-parallel aligned when compared to the second plane, the third plane being positioned at a degrees angle difference than the angle of the top surface of the fill port cap, the third plane angle of the shackle requiring the distance of separation from the shackle to the outer edge of the top surface of the fill port cap to be substantially less than the distance of separation from the shackle to the center of the fill port cap;
• or
• ii) no more than twenty percent of the fill port cap diameter away from the fill port cap outer edge;
• or
• iii) in a third plane and orientated lengthwise aligned and non-parallel aligned when compared to the second plane, the third plane being positioned at a degrees angle difference than the angle of the top surface of the fill port cap, the third plane angle of the shackle requiring the distance of separation from the shackle to the outer edge of the top surface of the fill port cap to be substantially less than the distance of separation from the shackle to the center of the fill port cap, and no more than twenty percent of the fill port cap diameter away from the fill port cap outer edge;
• d) a second collar that partially covers or fully covers a portion of, or all of the circumference of the first collar, the second collar length extending in the direction of the first collar length, the second collar covers and blocks the removal of the first collar first means for attachment to the tank fill-port nipple, and the second collar being secured in position by attachment to the lockable blocking device;
• and
• with the first collar first means for attachment attached to the tank fill-port nipple, the second collar mounted around the first collar, the first collar second means for attachment and the second collar attached to the lockable blocking device, and the lockable blocking device in the locked position;
• i) the second collar maintains a confined position covering and preventing the removal of the first collar first means for attachment to the tank fill-port nipple, therefore, securely maintaining the position of the first collar on the tank fill-port nipple;
• and
• ii) the tank fill-port cap is blocked from removal from the fill port of the fill port nipple, and the fill port cap pressure relief device if provided, is not obstructed from operation.