A controllable damper for resisting movement between two relatively moveable members includes a first member and a second member coupled for relative movement having a working space between them, and a controllable medium retaining structure, for example, an absorbent matrix, to hold a controllable medium...http://www.google.fr/patents/US6202806?utm_source=gb-gplus-shareBrevet US6202806 - Controllable device having a matrix medium retaining structure
Controllable device having a matrix medium retaining structure
