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US 6,669,056 B2Granted
Foaming device
AssigneeGuala Dispensing S.P.A.
InventorMaurizio Bistolfi
Life of this patent
Estimating the term…
Abstract
A foaming device, capable of generating foam by mixing a volume of air with a quantity of liquid, optionally connected to a tank of the liquid and provided with valves for controlling the flow of air and liquid, comprises an air chamber enclosed in a resiliently deformable diaphragm, and a liquid chamber. The diaphragm is shaped in such a way as to produce an increasing rate of flow of expelled air during deformation by an air piston.
Claims58
A foaming device capable of generating foam by mixing a volume of air with a quantity of liquid, the device being connectable to a tank of the liquid and comprising:
- a resiliently deformable diaphragm enclosing an air chamber capable of containing the volume of air that is to be mixed with the quantity of liquid, the resiliently deformable diaphragm being capable of changing from a rest configuration of the device to a deformed configuration of compression of the device for expulsion of the volume of air;
- a liquid chamber capable of containing the quantity of liquid that is to be mixed with the volume of air, the liquid chamber being capable of changing from a rest configuration of the device, in which it defines maximum volume, to the deformed configuration of maximum compression of the device in which it defines a minimum volume, wherein
- the resiliently deformable diaphragm is shaped in such a way as to bring about, an increasing rate of flow of expelled air from the air chamber as the device changes from the rest configuration to the deformed configuration of compression.
Dependencies are inferred from the claim text.