Fluid pump without non-return valves
First Claim
1. A fluid micropump, comprising:
- a micropump body;
a displacer which is adapted to be positioned at a first and at a second end position by means of a drive, said displacer and said pump body being implemented such that a pump chamber is defined therebetween, and said pump chamber being adapted to be fluid-connected to an inlet via a first opening and to an outlet via a second opening, which openings are not provided with check valves; and
an elastic buffer bordering on said pump chamber;
said displacer closing said first opening when it occupies said first end position and leaving said first opening free when it occupies said second end position; and
said buffer being sufficiently elastic so as to be deformed by an abrupt movement of said displacer to form a buffer volume, and sufficiently resilient to provide pumping action subsequent to its deformation.
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0 Petitions
Accused Products
Abstract
A fluid pump has a pump body and a displacer which is adapted to be positioned at a first and at a second end position by means of a drive, the displacer and the pump body being implemented such that a pump chamber is defined therebetween, and the pump chamber being adapted to be fluid-connected to an inlet and to an outlet via a first opening and a second opening which are not provided with check valves. An elastic buffer bordering on the pump chamber is provided. The displacer is implemented in the form of a plate which is secured to the pump body, and the pump body is provided with a recess defining the pump chamber. The drive acts on the displacer substantially in the area of the first opening. The displacer closes the first opening when it occupies its first end position and leaves the first opening free when it occupies its second end position. The drive means moves the displacer so abruptly from the second to the first end position that a deformation of the buffer means is caused by the movement of the displacer.
138 Citations
30 Claims
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1. A fluid micropump, comprising:
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a micropump body;
a displacer which is adapted to be positioned at a first and at a second end position by means of a drive, said displacer and said pump body being implemented such that a pump chamber is defined therebetween, and said pump chamber being adapted to be fluid-connected to an inlet via a first opening and to an outlet via a second opening, which openings are not provided with check valves; and
an elastic buffer bordering on said pump chamber;
said displacer closing said first opening when it occupies said first end position and leaving said first opening free when it occupies said second end position; and
said buffer being sufficiently elastic so as to be deformed by an abrupt movement of said displacer to form a buffer volume, and sufficiently resilient to provide pumping action subsequent to its deformation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A method of micropumping a fluid, said method comprising the steps of:
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providing;
a micropump body and a displacer defining a micropump chamber, with said micropump chamber being fluid-connected to an inlet via a first opening and to an outlet via a second opening, which openings are not provided with check valves; and
an elastic buffer bordering on said micropump chamber;
driving said displacer from a first end position in which said first opening is closed to a second end position in which said opening is free, with the movement of said displacer being sufficiently abrupt to deform said elastic buffer; and
permitting said elastic buffer to relax to provide a pumping action.
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30. A method of pumping a fluid, said method comprising the steps of:
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providing;
a pump body and a displacer defining a pump chamber, with said pump chamber being fluid-connected to an inlet via a first opening and to an outlet via a second opening, which openings are not provided with check valves; and
an elastic buffer bordering on said pump chamber;
said displacer having a first side substantially facing toward said first opening and a second side substantially facing opposite to said first opening,driving said displacer at a location on said second side and substantially in the area of said first opening from a first end position in which said first opening is closed to a second end position in which said opening is free, said movement being sufficiently abrupt to deform said elastic buffer; and
permitting said elastic buffer to relax to provide a pumping action.
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Specification