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US 6,598,618 B1Granted
Flow regulator
AssigneeP.M.P. Precise Medical Products Ltd.
InventorOfer Shay
Life of this patent
Estimating the term…
Abstract
The invention relates to a variable flow regulator adopted to provide accurate flow rates at low flow and ultra low flow rates. The regulator comprises a wide-range flow regulator for low fluids flow, comprising a housing divided into a first and second chambers by means of an elastic diaphragm. The chamber is provided with a fluid inlet and an outlet connected to a labyrinth path.
Claims28
A wide-range flow regulator for low fluid flows, comprising:
- a housing comprising first and second chambers, said first and second chambers each having an inlet and an outlet, said outlet of said first chamber and said inlet of said second chamber connected by a labyrinth path;
- an at least partly elastic diaphragm separating said first chamber and said second chamber, said diaphragm comprising an outer ring, a central disk, and an intermediate section connecting said outer ring and said central disk, wherein said intermediate section is more flexible than said central disk;
- and
- a discharge tube having an inlet connected to said outlet of said second chamber,
- wherein the central disk of said diaphragm seals the inlet of said discharge tube when there is a change in the pressure differential between said second chamber and said first chamber.
2 more elements
A wide-range flow regulator for low fluid flows, comprising:
- a housing comprising first and second chambers, said first and second chambers each having an inlet and an outlet, said outlet of said first chamber and said inlet of said second chamber connected by a labyrinth path;
- an at least partly elastic diaphragm separating said first chamber and said second chamber;
- a planar spring comprising an outer ring retained in said second chamber, an inner disk configured to press against said diaphragm, and a plurality of curved arms connecting said outer ring and said inner disk;
- and
- a discharge tube having an inlet connected to said outlet of said second chamber;
- wherein said diaphragm seals the inlet of said discharge tube when there is a change in the pressure differential between said second chamber and said first chamber.
3 more elements
A wide-range flow regulator for low fluid flows, comprising:
- a housing comprising first and second chambers, said first and second chambers each having an inlet and an outlet, said outlet of said first chamber and said inlet of said second chamber connected by a labyrinth path, said labyrinth path comprising an open channel disposed on the outer face of a hollow member and confined by the inner face of said housing;
- an at least partly elastic diaphragm separating said first chamber and said second chamber;
- and
- a discharge tube having an inlet connected to said outlet of said second chamber at a distance from said diaphragm;
- wherein said diaphragm seals the inlet of said discharge tube when there is a change in the pressure differential between said second chamber and said first chamber.
2 more elements
Dependencies are inferred from the claim text.