A coupling assembly includes a female unit and a male unit which is removably connected with the female unit. A valve unit is located in the female unit and includes a core with two flexible disks on two ends thereof. A flange extends radially outward from a lower end of the core and is rested on a support...http://www.google.fr/patents/US20090167018?utm_source=gb-gplus-shareBrevet US20090167018 - Coupling assembly with a core unit therein
Numéro de demande: 12/003,410 Numéro de publication: US 2009/0167018 A1 Date de dépôt: 26 déc. 2007 Brevet délivré: US7757704 ( Date de délivrance 20 juil. 2010)
