A reversing valve for a compressed air membrane pump in which an equilibrium state of the main piston in the neutral position, leading to stoppage of the pump, is prevented by disposing the main system piston and the pilot system piston immediately adjacent to one another. ...http://www.google.fr/patents/US20010016169?utm_source=gb-gplus-shareBrevet US20010016169 - REVERSING VALVE FOR A COMPRESSED AIR MEMBRANE PUMP
REVERSING VALVE FOR A COMPRESSED AIR MEMBRANE PUMP
Numéro de demande: 09/143,949 Numéro de publication: US 2001/0016169 A1 Date de dépôt: 31 août 1998 Brevet délivré: US6382934 ( Date de délivrance 7 mai 2002)
