US 12,290,203 B2
Pressure profiling device, particularly for dispensing units of pressurized liquids
Diego Andreis, Milan (IT); Francesco Butera, Arese (IT); and Filippo Lucetti, Carrara (IT)
Assigned to DOLPHIN FLUIDICS S.R.L., Corsico (IT)
Filed by DOLPHIN FLUIDICS S.R.L., Corsico (IT)
Filed on Oct. 26, 2021, as Appl. No. 17/510,480.
Claims priority of application No. 102020000028625 (IT), filed on Nov. 26, 2020.
Prior Publication US 2022/0160165 A1, May 26, 2022
Int. Cl. A47J 31/52 (2006.01); A47J 31/46 (2006.01)
CPC A47J 31/5255 (2018.08) [A47J 31/461 (2018.08); A47J 31/468 (2018.08); A47J 31/469 (2018.08); A47J 31/5251 (2018.08)] 10 Claims
OG exemplary drawing
 
1. A pressure profiling device, comprising:
a pump,
a delivery duct, and
a bypass duct,
wherein:
the pump is adapted to generate a flow of a pressurized liquid at an outlet side of the pump;
the outlet side of the pump is connected to the delivery duct;
the delivery duct comprises a three-way hydraulic fitting and a restriction, where the restriction is arranged between the outlet side of the pump and the three-way hydraulic fitting, and the restriction is configured to impose a reduction in flow rate of liquid leaving the pump;
the delivery duct is configured, downstream of a first outlet of the three-way hydraulic fitting, to connect to at least one dispensing unit of said liquid;
a first end of the bypass duct is connected to a second outlet of the three-way hydraulic fitting, and a second end of the bypass duct is connected to an inlet side of the pump;
the three-way hydraulic fitting is configured to divert a first part of said liquid leaving said pump into the bypass duct, while a remaining second part of said liquid continues on said delivery duct; and
the bypass duct comprises a proportional valve, wherein said proportional valve is configured to vary the flow rate of said first part of said liquid diverted in said bypass duct as a function of the degree of opening of said proportional valve so as to vary the pressure of the remaining second part of said liquid.