Sky diver boot thread hook, has outer curvature partially lying before insertion slit for thread, and thread-turn down ramp on side turned away from side piece in direction to vertex of outer curvature

摘要

The hook has a plate-shaped base (1) and a side piece (3), where a surface of the base facing the side piece has an outer curvature (13) in the base area turned away from the root area before the side piece. The outer curvature partially lies before an insertion slit (11) for a thread, and a thread-turn down ramp (14) on a side turned away from the side piece in a direction to a vertex of the outer curvature. Partial ramps are formed on the curvature, where part of the base lie between partial ramps.