Crushable plug

Abstract

The present invention relates to a plug ( 1 ) comprising at least two discrete glass discs ( 2 ), wherein there is provided between the glass discs a liquid ( 3 ) which contributes to load uptake and load distribution, and a pin-/claw device ( 4 ) is arranged to be pressed in a radial direction into at least one of the glass discs ( 2 ). A distinctive feature of the plug is that it does not include a functional drainage system, and the pin-/claw device ( 4 ) is arranged such that on activation there occurs a pressure leakage through the glass disc ( 2 ). Also suggested according to the invention is a volume compensator/constant pressure regulator ( 20, 21, 22; 23; 24 ).

1 . A plug ( 1 ) comprising at least two discrete glass discs ( 2 ), wherein there is provided between the glass discs a liquid ( 3 ) which contributes to load uptake and load distribution, and a pin-/claw device ( 4 ) is arranged to be pressed in a radial or axial direction into at least one of the glass discs ( 2 ),
 characterized in that the plug does not include a functional drainage system, and the pin-/claw device ( 4 ) is arranged such that on activation there occurs a pressure leakage through the glass disc ( 2 ).   
     
     
         2 . A plug ( 1 ) according to  claim 1 , wherein the plug comprises a volume compensator/constant pressure regulator ( 20 ). 
     
     
         3 . A plug ( 1 ) according to  claim 2 , wherein the volume compensator/constant pressure regulator ( 20 ) is in communication with a volume in which the liquid ( 3 ) is contained. 
     
     
         4 . A plug ( 1 ) according to  claim 3 , wherein the volume compensator/constant pressure regulator ( 20 ) comprises a piston- ( 21 ) and spring arrangement ( 22 ). 
     
     
         5 . A plug ( 1 ) according to  claim 3 , wherein the volume compensator/constant pressure regulator ( 20 ) comprises a pressurized metal bellows ( 23 ). 
     
     
         6 . A plug ( 1 ) according to  claim 3 , wherein the volume compensator constant pressure regulator ( 20 ) comprises a gas-filled balloon. 
     
     
         7 . A plug ( 1 ) comprising at least two discrete glass discs ( 2 ), wherein there is provided between the glass discs a liquid ( 3 ) which contributes to load uptake and load distribution, and a pin-/claw device ( 4 ) is arranged to be pressed in a radial or axial direction into at least one of the glass discs ( 2 ), and a drainage system for evacuation of the liquid ( 3 ) on crushing,
 characterized in that the plug ( 1 ) includes a volume compensator/constant pressure regulator ( 20 ).   
     
     
         8 . Plug ( 1 ) according to  claim 6 , wherein the volume compensator/constant pressure regulator ( 20 ) is in communication with a volume in which the liquid ( 3 ) is contained. 
     
     
         9 . A plug ( 1 ) according to  claim 7 , wherein the volume compensator/constant pressure regulator ( 20 ) comprises a piston- ( 21 ) and spring arrangement ( 22 ). 
     
     
         10 . A plug ( 1 ) according to  claim 7 , wherein the volume compensator/constant pressure regulator ( 20 ) comprises a pressurized metal bellows ( 23 ). 
     
     
         11 . A plug ( 1 ) according to  claim 7 , wherein the volume compensator/constant pressure regulator ( 20 ) comprises a gas-filled balloon, bubble, sphere, or the like ( 24 ). 
     
     
         12 . A plug ( 1 ) comprising at least two discrete glass discs ( 2 ), wherein there is provided between the glass discs a liquid ( 3 ) which contributes to load uptake and load distribution, and a pin-/claw device ( 4 ) arranged to be pressed in a radial or axial direction into at least one of the glass discs ( 2 ),
 characterized in that the plug does not include a functional drainage system and does not include a volume compensator/constant pressure regulator, wherein the liquid ( 3 ) is pressurized to a predetermined pressure, and the pin-/claw device ( 4 ) is arranged such that on activation there occurs a pressure leakage through the glass disc ( 2 ).