A suction wand assembly includes a suction wand connected to a valve assembly. The valve assembly includes a pressable button or similar device for allowing a user to regulate suction force through the suction wand. The valve assembly optionally includes a locking mechanism for holding the valve in a...http://www.google.fr/patents/US8012141?utm_source=gb-gplus-shareBrevet US8012141 - Suction wand
