| 摘要 |
A support tube is formed of a length of flexible material that is shaped into a spiraling coil. The coils can be tightened by twisting to form a rigid tube. By twisting and lengthening the coils, the rigid tube can be adjusted as desired to have an appropriate diameter and length. The friction between the overlapped coils secures the tube once tightened. Different materials and modifications to the material, such as an abutment, can be made to customize the spiraling support tube for a desired function. |
