A mechanism for providing selective engagement of spring members to a user manipulatable object in a force feedback interface device. A moveable member included in a force feedback mechanism is moveable in a degree of freedom to transmit forces to the user manipulatable object, such as a joystick handle....http://www.google.fr/patents/US6104382?utm_source=gb-gplus-shareBrevet US6104382 - Force feedback transmission mechanisms
