Patent ID: 7861875
Filing Date: 2011-01-04
Classification: B01J,B01L

Abstract:
1. A seal for a tube having a projection coming out of the tube, comprising: upper and lower rigid plates, each having a perimeter and defining first and second openings, wherein said first openings extend to the perimeter of their respective plates; at least one flexible plate having a perimeter and defining first and second openings, wherein said first opening extends to the perimeter of the flexible plate, said flexible plate being sandwiched between the upper and lower rigid plates; wherein said first openings of said upper and lower rigid plates and of said flexible plate are vertically aligned and said second openings of said upper and lower rigid plates and of said flexible plate are vertically aligned; and wherein said upper and lower rigid plates have substantially the same diameter and said flexible plate has a diameter that expands to be larger than the diameter of the upper and lower rigid plates when it is compressed between the upper and lower rigid plates.