×

MICROPUMP AND METHOD FOR MANUFACTURING THEREOF

  • US 20110021990A1
  • Filed: 10/02/2009
  • Published: 01/27/2011
  • Est. Priority Date: 07/23/2009
  • Status: Abandoned Application
First Claim
Patent Images

1. A micropump comprising a pump housing (1, 50, 80, 501) containing at least one piston chamber (1

  • , 52, 84, 504), at least one piston (2, 53, 83, 503) arranged to be linearly actuable to move back and forth inside the chamber, the micropump having at least one inlet port (13i, 60i, 86i, 550i) and at least one outlet port (15o, 60o, 86o, 550o) arranged so that a fluid can be sucked through the inlet port into the chamber during an instroke of the piston and expelled from the chamber through the outlet port during an outstroke of the piston, the pump further including a valve system, characterized in that the valve system comprises, on the one hand, at least one gasket (10, 57, 85, 570) that is shaped to define at least three cavities (12, 12a, 12b, 57i, 57o, 57a, 85a, 85i, 85o, 510i, 510o, 520) connected respectively to the piston chamber, the inlet port and the outlet port of the pump, and on the other hand, a valve switching element (16, 51, 80, 501) mounted on the gasket to allow relative movement between the gasket and the valve switching element, at least one groove (17, 67, 90, 517) or other recess (317) being arranged on the valve switching element such that, during piston instrokes, said groove or recess moves along or across a part of the gasket that is adjacent to the cavities connected respectively to the piston chamber and the inlet port of the pump, thereby creating a first communication allowing leakage between said cavities so that fluid is sucked into the piston chamber during a piston instroke, while, during piston outstrokes, said groove or recess moves along or across a part of the gasket that is adjacent to the cavities connected respectively to the piston chamber and the outlet port of the pump, thereby creating a second communication allowing leakage between said cavities so that fluid is expelled out of the piston chamber through the outlet port during a piston outstroke.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×