Patent ID: 9452510
Filing Date: 2016-09-27
CPC Classification: B25B

Claim Text:
1. A device with supports ( 3 , 4 ) which are capable of being moved with respect to each other and mutually facing inner walls of which have provided on them toothed profiles ( 6 , 7 ) which co-operate in each case with opposed segments ( 31 , 32 ) of a rotatable toothed wheel ( 2 ), by the rotation of which the supports ( 3 , 4 ) are capable of being simultaneously moved in synchronism in opposed directions, the toothed wheel ( 2 ) has a differing tip circle diameter (d) along its periphery, characterized in that the tip circle diameter (d) increases along a segment ( 31 , 32 ) and an effective external diameter (dw) of the toothed wheel ( 2 ) is present between the supports ( 3 , 4 ) in a clamped rotational setting and the effective external diameter (dw) corresponds to a nominal diameter.