Patent ID: 6250839
Filing Date: 2001-06-26
Classification: A63C,Y10T

Abstract:
A length-adjustable tube, comprising:at least one outer tube;an inner tube, inserted into said at least one outer tube in a telescope-like manner for adjusting the tube length; andan expansion device including an expansion element by means of which said inner tube can be axially clamped in place in said outer tube, wherein:said expansion device defines an area where it can be approximately radially spread apart; andsaid expansion element defines an outer circumference and is provided with at least one flexible friction element in said area used to compensate diameter tolerances between said inner tube and said outer tube, said at least one flexible friction element extending radially past said outer circumference, wherein said at least one flexible friction element is provided, in the axial direction, with a crowned outer contour, which is at least flush at both ends with said outer circumference.