Patent ID: 8413962
Filing Date: 2013-04-09
Classification: F16L

Abstract:
1. A device for moving a working means in the ground, comprising a rod assembly having at least one projection or recess, a push-pull unit for generating a linear movement of the rod assembly, at least one coupling means rotatable about an axis of rotation for establishing a drive connection between the push-pull unit and the rod assembly, wherein the coupling means is configured to engage the at least one projection or recess of the rod assembly such that the coupling means transmits a first feed force from the push-pull unit to the rod assembly via a first contact area of the coupling means, wherein the coupling means is configured to engage the at least one projection or recess of the rod assembly such that the coupling means transmits a counter force opposite to the first feed force from the push-pull unit to the rod assembly via a second contact area of the coupling means, wherein the counter force opposite to the first feed force generates a torque acting on the coupling means, which torque presses the second contact area of the coupling means with a contact force against the rod assembly, wherein the coupling means establishes a non-positive connection between the push-pull unit and the rod assembly by the contact force and transmits a second feed force to the rod assembly via this non-positive connection, and wherein at least a part of the first and second feed force acting on the rod assembly causes the linear movement of the rod assembly.