Electronic micro-pump
AssigneeRexam Dispensing Systems S.A.S.
InventorsJean-Louis Bougamont, Pierre Dumont
Life of this patent
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Abstract
A micropump provided with a cylindrical body (1) containing a measuring chamber (10) defined by a piston (2) and communicating firstly with a tank via an inlet orifice (10a) provided with an inlet valve, and secondly with the outside via an outlet orifice (10b) provided with an outlet valve, the micropump being characterized in that the piston (2) is connected to an external reciprocating actuator, and in that at least one of said valves is constituted by a valve member (3, 6, 7) suitable for being driven in translation by friction contact with said piston (2) successively in one direction and then in the other, and whose stroke inside the chamber (10) is shorter than the stroke of said piston.
Claims12
A micropump comprising a cylindrical body defining a measuring chamber defined by a piston and communicating firstly with a tank via an inlet orifice provided with an inlet valve, and secondly with the outside via an outlet orifice provided with an outlet valve, wherein the piston is connected to an external reciprocating actuator for actuation over a piston stoke, and wherein at least one of said valves comprises a valve member arranged to be driven in translation by friction contact with said piston successively in one direction and then in the other, said valve member having a stroke inside the measuring chamber that is shorter than the stroke of said piston.
Dependencies are inferred from the claim text.