초록 ▼

A dispensing system comprising first and second collapsible storage containers, a pump and a pressure responsive selector coupled to both of the storage containers and to the intake side of the pump. The selector includes a valve movable between a first position in which the selector provides commun

A dispensing system comprising first and second collapsible storage containers, a pump and a pressure responsive selector coupled to both of the storage containers and to the intake side of the pump. The selector includes a valve movable between a first position in which the selector provides communication between the first storage container and the pump and blocks communication between the second storage container and the pump and a second position in which the selector provides communication between the second collapsible container and the pump and blocks communication between the first collapsible container and the pump. An actuator is responsive to the pressure drop at the selector resulting from the collapse of one of the collapsible containers for moving the valve from one of its positions to the other of its positions.

대표청구항 ▼

A dispensing system with automatic storage means selection, said dispensing system comprising: first storage means for storing a liquid to be dispensed; second storage means for storing a liquid to be dispensed, each of said storage means being essentially closed to the atmosphere at least when such

A dispensing system with automatic storage means selection, said dispensing system comprising: first storage means for storing a liquid to be dispensed; second storage means for storing a liquid to be dispensed, each of said storage means being essentially closed to the atmosphere at least when such storage means has at least some of the liquid removed therefrom; a pump having an intake side and a discharge side; a pressure responsive selector coupled to both of said storage means and the intake side of said pump; said selector including linearly reciprocable valve means movable between a first position in which the selector provides communication between said first storage means and said pump and blocks communication between said second storage means and said pump and a second position in which the selector provides communication between said second storage means and said pump and blocks communication between said first storage means and said pump; and pressure responsive actuator means responsive to the pressure drop at the selector resulting from at least the partial arrest of the liquid flow from the storage means supplying liquid to the selector for moving the valve means from one of said positions to the other of said positions whereby liquid can be supplied from the other of said storage means through the selector to the pump and the storage means which previously supplied liquid to the selector can be replaced.