Ski pole

Abstract

The invention is directed to a ski pole comprising a longitudinal shaft. The shaft includes a cross-section that comprises: a first part including a curved first portion arranged symmetric about a cross-sectional centerline (CL) of the shaft, and a second part including a second portion arranged symmetric about the cross-sectional centerline. Wherein the first part is connected to the second part by side parts including side portions, each side part comprises a first end connected to an end of the first part and a second end connected to an end of the second par, each connection between the side parts and the first and second parts forms a corner, such that there are total four corners in the cross-section of the shaft.

1 . A ski pole comprising a longitudinal shaft, the shaft includes a cross-section that comprises:
 a first part including a curved first portion arranged symmetric about a cross-sectional centerline of the shaft, and   a second part including a second portion arranged symmetric about the cross-sectional centerline,   wherein the first part is connected to the second part by side parts including side portions, each side part comprises a first end connected to an end of the first part and a second end connected to an end of the second part (4), each connection between the side parts and the first and second parts forms a corner, such that there are total four corners in the cross-section of the shaft.   
     
     
         2 . The ski pole according to  claim 1 , 
 wherein the curved first portion is a circular arc defined by an angle θ and forms part of a circumference of a circle with radius.   
     
     
         3 . The ski pole according to  claim 2 , 
 wherein the angle θ is less than 180 degrees.   
     
     
         4 . The ski pole according to  claim 2 , 
 wherein a length of the second portion is equal to or less than the radius of the curved first portion.   
     
     
         5 . The ski pole according to  claim 2 , wherein a length of the circular arc is 3 times the radius, and the length of the second portion is one time the radius. 
     
     
         6 . The ski pole according to  claim 2 , wherein the curved first portion and each of the four corners are located on or at an outer circumference of the circle with the radius. 
     
     
         7 . The ski pole according to  claim 1 , 
 wherein the second part (4) and each of the side parts are slightly curved portions.   
     
     
         8 . The ski pole according to  claim 1 , wherein the second part (4) and side parts are straight portions. 
     
     
         9 . The ski pole according to  claim 8 , wherein the shaft comprises a top end and a bottom end, wherein the radius is gradually decreasing from the top end towards the bottom end. 
     
     
         10 . The ski pole according to  claim 9 , 
 wherein the top end of the shaft comprises a cross-section according to any one of  claims 1-8 , and the bottom end is provided with a circular cross section.   
     
     
         11 . The ski pole according to  claim 10 , 
 wherein the cross-sectional shape of the top end of the shaft gradually changes towards the cross-sectional shape of the bottom while moving towards the bottom end.   
     
     
         12 . The ski pole according to  claim 11 , 
 wherein at a distance from the bottom end of the shaft the shaft is provided with a section with a slightly distorted diameter compared to the section immediately preceding and following said distorted diameter section of the shaft.