Patent ID: 8182186
Filing Date: 2012-05-22
Classification: F16B

Abstract:
1. A screw ( 11 ), comprising a shaft ( 12 ); a thread ( 13 ) arranged at least in some areas over a circumference of the shaft ( 12 ) and defining a helix ( 14 ), and elongate cutting bodies ( 26 ; 36 ; 46 ; 56 ; 66 ) made of a material having a hardness greater than the hardness of the thread ( 13 ), the thread ( 13 ) having a plurality of recesses ( 20 , 21 ) for receiving the elongate cutting bodies ( 26 ; 36 ; 46 ; 56 ; 66 ) and oriented along the helix ( 14 ), and the elongate cutting bodies ( 26 ; 36 ; 46 ; 56 ; 66 ) being inclined along a longitudinal extent thereof relative to respective tangents of the helix ( 14 ) so that longitudinal axes ( 27 ; 37 ; 47 ; 57 ; 67 ) of the elongate cutting bodies ( 26 ; 36 ; 46 ; 56 ; 66 ) form with the respective tangents of the helix ( 14 ) an angle (A; B; C; D) different from O°.