Low-pressure and low-energy self-regulating valve
US-10254770-B2 · Apr 9, 2019 · US
Low-pressure and low-energy self-regulating valve
US10761545B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10761545-B2 |
| Application number | US-201916376574-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 5, 2019 |
| Priority date | Nov 20, 2015 |
| Publication date | Sep 1, 2020 |
| Grant date | Sep 1, 2020 |
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- Title
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Abstract
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A passive, self-regulating valve includes a static pressure chamber and an elastically collapsible tube supported within the static pressure chamber. The elastically collapsible tube is defined by a geometry that determines an activation pressure of the valve. The passive, self-regulating valve also includes a flow restrictor in fluid communication with the elastically collapsible tube inside the static pressure chamber, as well as piping connecting a source of pressurized liquid both to the flow restrictor and to an opening into the static pressure chamber. The piping enables the flow restrictor to control flow rate of the pressurized liquid through the valve independent of the activation pressure of the valve. In a preferred embodiment, the flow restrictor is a needle valve.
First claim
Opening claim text (preview).
What is claimed is: 1. A passive, self-regulating valve comprising: a static pressure chamber; an elastically collapsible tube supported within the static pressure chamber, the elastically collapsible tube being defined by a geometry that determines an activation pressure of the valve; a flow restrictor in fluid communication with the elastically collapsible tube inside the static pressure chamber; and piping connecting a source of pressurized liquid both to the flow restrictor and to an opening into the static pressure chamber, the piping enabling flow restrictor to control flow rate of the pressurized liquid through the valve independent of the activation pressure of the valve. 2. The passive, self-regulating valve of claim 1 , wherein the flow restrictor is a needle valve. 3. The passive, self-regulating valve of claim 1 , wherein the flow restrictor is a tortuous path, an orifice, or other flow restrictor. 4. The passive, self-regulating valve of claim 1 , wherein the geometry of the collapsible tube includes an inner diameter in a range of approximately 0.6-1.3 cm. 5. The passive, self-regulating valve of claim 4 , wherein the inner diameter is approximately 0.6 cm. 6. The passive, self-regulating valve of claim 1 , wherein the geometry of the elastically collapsible tube includes a wall thickness in a range of approximately 0.8-2.4 mm. 7. The passive, self-regulating valve of claim 6 , wherein the wall thickness is approximately 2.4 mm. 8. The passive, self-regulating valve of claim 1 , wherein the geometry of the elastically collapsible tube includes an inner diameter of approximately 0.6 cm and a wall thickness of approximately 2.4 mm. 9. The passive, self-regulating valve of claim 1 , wherein the geometry of the elastically collapsible tube includes a length in a range of approximately 22-122 cm. 10. The passive, self-regulating valve of claim 9 , wherein the length is approximately 23 cm. 11. The passive, self-regulating valve of claim 1 , wherein the elastically collapsible tube is formed using Penrose rubber. 12. The passive, self-regulating valve of claim 1 , wherein the elastically collapsible tube is formed of Latex or Silastic rubber. 13. The passive, self-regulating valve of claim 1 , wherein the valve is characterized by a normalized activation pressure of approximately 3. 14. The passive, self-regulating valve of claim 1 , wherein the valve is characterized by a normalized activation pressure of approximately 3.3.
Assignees
Inventors
Classifications
Valves therefor · CPC title
Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation · CPC title
- G05D7/0113Primary
the sensing element acting as a valve · CPC title
Buffers therefor · CPC title
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- What does patent US10761545B2 cover?
- A passive, self-regulating valve includes a static pressure chamber and an elastically collapsible tube supported within the static pressure chamber. The elastically collapsible tube is defined by a geometry that determines an activation pressure of the valve. The passive, self-regulating valve also includes a flow restrictor in fluid communication with the elastically collapsible tube inside t…
- Who is the assignee on this patent?
- Massachusetts Inst Technology, Jain Irrigation Systems Ltd
- What technology area does this patent fall under?
- Primary CPC classification G05D7/0113. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 01 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).