초록 ▼

The present invention is an improved tubular device for carrying liquids or gases that is resistant to leakage following a puncture. In its preferred form, the tubular device employs two or more concentrically mounted tube elements that are adapted to move relative to one another following puncture

The present invention is an improved tubular device for carrying liquids or gases that is resistant to leakage following a puncture. In its preferred form, the tubular device employs two or more concentrically mounted tube elements that are adapted to move relative to one another following puncture and removal of the puncturing device. This relative movement creates a discontinuous opening through the device that is resistant to fluid leakage. The device may likewise be constructed to cause at least one of the puncture holes to contract, thus further limiting fluid loss. The device of the present invention is particularly useful as an implantable device, such as a vascular graft.

대표청구항 ▼

[ The invention claimed is:] [1.] A tube resistant to leakage when punctured comprisinga first tube element having a length;a second element having a length;the second element placed over the first tube element with an interference fit between the first tube element and the second element;wherein th

[ The invention claimed is:] [1.] A tube resistant to leakage when punctured comprisinga first tube element having a length;a second element having a length;the second element placed over the first tube element with an interference fit between the first tube element and the second element;wherein the first tube element and second element are adapted to move relative to one another when a diagonal puncture is place through the tube with a needle creating a misalignment of a hole through the first tube element and a hole in the second element when the needle is removed;wherein when in an interference fit between the first tube element and the second element, the first tube element has a stress applied along its length different from a stress applied to the second element along its length; andwherein the first tube element and the second element each has a natural resting state of stress along its length; and the first tube element is stretched from its natural state of stress and the second element is compressed from its natural state of stress.