There is disclosed a hanging device including a hanger, a stationary connector, a rotational connector, and a tool-connecting element. The rotational connector is connected to a first portion of the tool-connecting element. A tool can be connected to an opposite second portion of the tool-connecting...http://www.google.fr/patents/US7264213?utm_source=gb-gplus-shareBrevet US7264213 - Hanging device for tool
