A coupling device includes a main body defining a fluid flow passage, and a valve member moveable between an unconnected state and a connected state. The coupling device also includes a magnet coupled to the valve member, and a sensor coupled to the main body, the sensor being configured to sense a change...http://www.google.fr/patents/US7841357?utm_source=gb-gplus-shareBrevet US7841357 - Connection state sensing for coupling device
