Device for producing a bore in the ground, rotary drive device and rotary seal arrangement

Abstract

A device for producing a bore in the ground includes a spindle comprising a rotary lead-through and a first sealing face configured to be cylindrical. The spindle is configured so as to be rotatably led through a housing via the rotary lead-through. The housing comprises a second sealing face configured to be concentric with respect to the first sealing face. A rotary seal arrangement is configured to seal the rotary lead-through of the spindle through the housing. The rotary seal arrangement comprises a shaft seal configured to act between the first sealing face of the spindle and the second sealing face of the housing. A labyrinth seal is arranged upstream of the shaft seal when viewed from an outside of the housing.

Dependencies are inferred from the claim text.