| 摘要 |
AN APPARATUS (100) FOR INJECTING A FLUID SUBSTANCE INTO CRACK IS DISCLOSED. THE APPARATUS (100) INCLUDES A HOUSING (102) HAVING AN INTERNAL CAVITY. AT LEAST A PORTION OF THE HOUSING (102) IS AT LEAST PARTIALLY TRANSPARENT. THE APPARATUS (100) ALSO INCLUDES A SUBSTANTIALLY PLATE-LIKE MEMBER (124) DISPOSED WITHIN THE INTERNAL CAVITY OF THE HOUSING. THE PERIPHERY OF THE PLATE-LIKE MEMBER (124) CONTACTS ONE OR MORE INTERNAL SURFACES OF THE HOUSING DEFINING THE INTERNAL CAVITY. IT ALSO INCLUDES MEANS FOR FLUIDLY COMMUNICATING THE FLUID SUBSTANCE BETWEEN ONE SIDE OF THE PLATE-LIKE MEMBER AND THE CRACK. FURTHER, THE APPARATUS (100) HAS MEANS FOR BIASING THE PLATE-LIKE MEMBER IN A FIRST DIRECTION WITHIN THE HOUSING. THE-PLATE LIKE MEMBER AND THE BIASING MEANS ARE RESPONSIVE TO PRESSURE CREATED BY THE FLUID SUBSTANCE IN FLUID COMMUNICATION WITH THE CRACK AND THE PLATE-LIKE MEMBER. THE PLATE-LIKE MEMBER IS ABLE TO MOVE IN AN OPPOSITE DIRECTION WHEN THE PRESSURE EXERTED AGAINTS THE PLATE-LIKE MEMBER EXCEEDS A PREDETERMINED MINIMUM PRESSURE. STILL FURTHER, AT LEAST A PORTION OF THE PLATE-LIKE MEMBER IS VISIBLE THROUGH THE AT LEAST PARTIALLY TRANSPARENT PORTION OF THE HOUSING TO INDICATE THE PRESSURE EXERTED BY THE FLUID SUBSTANCE AGAINTS THE PLATE-LIKE MEMBER.FIG. 1
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