US20190336989A1 - Low-flow emitter - Google Patents
Low-flow emitter Download PDFInfo
- Publication number
- US20190336989A1 US20190336989A1 US16/511,467 US201916511467A US2019336989A1 US 20190336989 A1 US20190336989 A1 US 20190336989A1 US 201916511467 A US201916511467 A US 201916511467A US 2019336989 A1 US2019336989 A1 US 2019336989A1
- Authority
- US
- United States
- Prior art keywords
- thread
- housing
- thread section
- section
- passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
- B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G25/00—Watering gardens, fields, sports grounds or the like
- A01G25/02—Watering arrangements located above the soil which make use of perforated pipe-lines or pipe-lines with dispensing fittings, e.g. for drip irrigation
- A01G25/023—Dispensing fittings for drip irrigation, e.g. drippers
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Environmental Sciences (AREA)
- Nozzles (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A low-flow emitter includes a first housing and a second housing. The first housing includes a first thread portion, and a first passage defined in the first thread portion. The second housing includes a second thread portion, and a second passage defined in the second thread portion corresponding with the first thread portion in a thread connection. Part of the thread connection between the first and second housings is a loose fitting thread connection. A spiral passage is formed along the loose fitting thread connection between the first and second housings. Water flow rate is able to be controlled by a rotation of the first housing with respect to the second housing.
Description
- This application is a divisional of application Ser. No. 15/195,025, filed on Jun. 28, 2016.
- The present invention relates to a chip emitter, specifically to a low-flow emitter which offers precise control of water flow rate.
- In low-flow irrigation, sometimes known as micro-irrigation, water is delivered to the irrigation area at low and uniform flow rate, thereby conserving water.
- For low-flow emitter, a typical method of flow rate adjustment is controlling the size of an opening through which water passes through to the emitter nozzle. For example, China Publication No “CN202238389” discloses a drip hole formed on a thread emitter core. An emitter sleeve shadowing the drip hole reduces the flow rate. The flow rate can be controlled by the relative overlapping between the emitter sleeve and the drip hole. However, the position of the emitter sleeve is difficult to control precisely.
- In the interest of water conservation, a low-flow emitter having precise adjustment control of flow rate is desired.
- It is therefore one or more aspects to a low-flow emitter with simple structure and convenient manipulation, and the low-flow emitter offers precise flow rate adjustment.
- For one or more aspects of the present invention, a low-flow emitter is disclosed. The low-flow emitter includes a first housing, a second housing, and a spiral passage. The first housing includes a first thread portion, and a first passage formed coaxially with the first thread portion. The first thread portion includes a first thread section. The second housing includes a second thread portion, and a second passage formed coaxially with the second thread portion. The second thread portion includes a third thread section corresponding with the first thread section of the first thread portion of the first housing. The spiral passage is defined between the third thread section of the second thread portion of the second housing and the first thread section of the first thread portion of the first housing, and is communicated with the first and second passages.
- For one or more aspects of the present invention, a low-flow emitter is disclosed. The low-flow emitter includes a first housing, a second housing, and a spiral passage. The first housing includes a first thread portion, and a first passage formed coaxially defined in with the first thread portion; the first thread portion including a first thread section. The second housing includes a second thread portion, and a second passage formed coaxially with defined in the second thread portion; the second thread portion including a third thread section corresponding with the first thread section of the first thread portion of the first housing. The spiral passage is defined between the third thread section of the second thread portion of the second housing and the first thread section of the first thread portion of the first housing, and communicated with the first and second passages.
- In one comprehension of the present invention, the spiral passage of the low-flow emitter will restrain the water flow from the second passage to the first passage, in order to hold the water pressure and realize steady water dispensing. On the other hand, the first and second thread portions are defined a diameter being tapered off, and dimensions of the spiral passage could be adjusted by operating a relative rotation between the first and second housings.
- Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure.
-
FIG. 1 is a perspective view showing a low-flow emitter in accordance to a first embodiment of the present invention; -
FIG. 2 . is an explosion in accordance toFIG. 1 ; -
FIG. 3 . is a cross-sectional profile showing a first housing in accordance toFIG. 1 ; -
FIG. 4 is a cross-sectional profile showing a second housing in accordance toFIG. 1 ; -
FIG. 5 is a cross-sectional profile in accordance toFIG. 1 ; -
FIG. 6 is a cross-sectional profile showing the low-flow emitter in accordance to a second embodiment of the present invention; -
FIG. 7 is a perspective view showing the low-flow emitter in accordance to a third embodiment of the present invention; -
FIG. 8 is an explosion in accordance toFIG. 7 ; -
FIG. 9 is a cross-sectional profile showing a first housing in accordance toFIG. 7 ; -
FIG. 10 is a cross-sectional profile showing a second housing in accordance toFIG. 7 ; -
FIG. 11 is a cross-sectional profile in accordance toFIG. 7 ; -
FIG. 12 is a cross-sectional profile showing an explosion of the low-flow emitter in accordance to a fourth embodiment of the present invention; and -
FIG. 13 is a cross-sectional profile in accordance toFIG. 12 . - The present invention relates to a low-flow emitter 10 (10 a-10 c). The low-
flow emitter 10 includes a first housing 20 (20 a-20 c), a second housing 30 (30 a-30 c), and a spiral passage 12 (12 a, 12 b). The low-flow emitter 10 (10 a-10 c) according to the embodiments of the present invention will be described with reference to the drawings. Repeated description thereof may be omitted. -
FIGS. 1 through 4 pertain to a first embodiment of the invention. - The
first housing 20, referring toFIGS. 1 and 3 , includes anend member 21, acircumference member 22, atubular head 211, afirst passage 25, an exterior thread bore 23, and afirst thread portion 26. A top of thecircumference member 22 borders a periphery of theend member 21. Thetubular head 211 extends from an exterior face of theend member 21. Thefirst passage 25 is coaxially formed in thetubular head 211. Theexterior thread bore 23 is formed from an interior face of theend member 21, and coaxially corresponds with thetubular head 211. Thefirst thread portion 26 is formed in the exterior thread bore 23. - The
first thread portion 26 includes afirst thread section 261 and asecond thread section 262 connected with each other. Thefirst thread section 261 defines a major diameter d1 which increases gradually in a direction away from thefirst passage 25. Therefore, thefirst thread section 261 is tapered off Thesecond thread section 262 is generally straight. A distance from thefirst thread section 261 to thefirst passage 25 is less than that from thesecond thread section 262 to thefirst passage 25. Each of the first and thesecond thread sections first thread section 261 equals to that of thesecond thread section 262. - The
second housing 30, referring toFIGS. 2 and 4 , includes aconnection base 31, aflange 32, anexterior thread axle 33, asecond passage 35, anorifice 351, and asecond thread portion 36. Theconnection base 31 is adapted for connecting with an irrigation pipe (not illustrated). Theflange 32 connects to a top of theconnection base 31. Thesecond passage 35 is coaxially formed on thesecond housing 30 and extends from a bottom end of theconnection base 31. Thesecond passage 35 communicates outwardly via theorifice 351. Theexterior thread axle 33 extends from theflange 32 in a direction away from theflange 32. Thesecond thread portion 36 is formed on an exterior periphery of thethread axle 33. Theorifice 351 is radially formed on theexterior thread axle 33. - The
second thread portion 36 includes athird thread section 361 and afourth thread section 362 connected with each other. Thethird thread section 361 defines a minor diameter d2 which gradually reduces in a direction away from theflange 32, which means it also gradually increases in a direction away from thefirst passage 25. Therefore, thethird thread section 361 tapers off. Thethird thread section 361 of thesecond thread portion 36 corresponds to thefirst thread section 261 of thefirst thread portion 26; thefourth thread section 362 of thesecond thread portion 36 corresponds to thesecond thread section 262 of thefirst thread portion 26. A distance from thethird thread section 361 to theflange 32 is greater than that from thefourth thread section 362 to theflange 32. Each of the third and thefourth thread sections third thread section 361 is less than the crest height H2 of thefourth thread section 362. The crest height H2 of thefourth thread section 362 generally equals to the thread depth D of thesecond thread section 262 of thefirst housing 20. The crest height H1 of thethird thread section 361 is less than the thread depth D of thefirst thread section 261 of thefirst housing 20. - During assembly, referring to
FIG. 5 , thesecond thread portion 36 engages thefirst thread portion 26 to enable thesecond housing 30 connect thefirst housing 20 until theflange 32 of thesecond housing 30 retains against an end of the exterior thread bore 23. After completion of the assembly, thethird thread section 361 of thesecond housing 30 engages thefirst thread section 261 of thefirst housing 20 while thefourth thread section 362 of thesecond housing 30 engages thesecond thread section 262 of thefirst housing 20. - The
spiral passage 12 is formed between the crest of thethird thread section 361 and the root of thefirst thread section 261 due to the crest height H1 of thethird thread section 361 being less than the thread depth D of thefirst thread section 261. An end of thespiral passage 12 communicates with thefirst passage 25 of thefirst housing 20. An opposite end of thespiral passage 12 communicates with thesecond passage 35 of thesecond housing 30 via theorifice 351. The water flows from thesecond passage 35 through theorifice 351 to thespiral passage 12, and then enters thefirst passage 25 for water distribution. - The
first thread portion 26 of thefirst housing 20 and thesecond thread portion 36 of thesecond housing 30 are tapered off. Dimensions of thespiral passage 12 is able to adjust by a rotation of thefirst housing 20. During the adjustment rotation, thefourth thread section 362 of thesecond thread portion 36 of thesecond housing 30 tightly engages thesecond thread section 262 of thefirst thread portion 26 of thefirst housing 20, thereby preventing disengagement between the first andsecond housings - In an alternative embodiment (not illustrated), the crest height the
first thread section 261 of thefirst housing 20 is less than the thread depth of thethird thread section 361 of thesecond housing 30, and thespiral passage 12 is formed between the crest of the first thread section of the first housing and the root of the third thread section of the second housing. - In an alternative embodiment (not illustrated), the first and
second housings first housing 20 connects the water source while thesecond housing 30 offers water dispensing. In this case, the water flows from thefirst passage 25 into thespiral passage 12, and then goes into thesecond passage 35 through theorifice 351 for water dispensing. - In an alternative embodiment (not illustrated), a distance from the
first thread section 261 to thefirst passage 25 is greater than that from thesecond thread section 262 to thefirst passage 25. A distance from thethird thread section 361 to theflange 32 is smaller than that from thefourth thread section 362 to theflange 32. An optional water sealing member is disposed on the flange. Upon assembly, the water sealing member presses against an interior wall of the circumference member. -
FIG. 6 pertains to a low-flow emitter 10 a according to a second embodiment of the invention, which is similar to the first embodiment in that thefirst housing 20 a includes afirst thread portion 26 a having afirst thread section 261 a, thesecond housing 30 a includes asecond thread portion 36 a having athird thread section 361 a, and aspiral passage 12 a is formed between the first andthird thread sections - The low-flow emitter is specially adapted for hanging irrigation where water flows through a
first passage 25 a in a downward manner. It should be comprehended that the second and fourth thread sections are omitted in the case. -
FIGS. 7 to 11 pertain to a third embodiment of the invention. A low-flow emitter 10 b includes afirst housing 20 b, asecond housing 30 b, and aspiral passage 12 b. - The
first housing 20 b, referringFIGS. 7 to 9 , includes anend member 21 b, acircumference member 22 b, an abuttingface 24 b, fourfirst passages 25 b, an exterior thread bore 23 b aninterior thread axle 29 b, and afirst thread portion 26 b. A top of thecircumference member 22 b borders a periphery of theend member 21 b. The abuttingface 24 b is formed from an interior face of theend member 21 b and adjacent to thecircumference member 22 b. The fourfirst passages 25 b are formed on theend member 21 b. The exterior thread bore 23 b extends from an interior face of theend member 21 b. Theinterior thread axle 29 b is coaxially arranged through the exterior thread bore 23 b. - The
first thread portion 26 b includes afirst thread section 261 b and asecond thread section 262 b. Thefirst thread section 261 b is arranged on theinterior thread axle 29 b, and thesecond thread section 262 b is coaxially arranged on the exterior thread bore 23 b. Thefirst thread section 261 b defines a minor diameter d3 which gradually reduces in a direction away from thefirst passages 25 b. Therefore, thefirst thread section 261 b is tapered off. - The
second housing 30 b, referringFIGS. 8 and 10 , includes aconnection base 31 b, aflange 32 b, asecond passage 35 b, an interior thread bore 39 b, anexterior thread axle 64, and asecond thread portion 36 b. Theconnection base 31 b is adapted for connecting with an irrigation pipe (not illustrated). Theflange 32 b connects to a top of theconnection base 31 b. Thesecond passage 35 b is coaxially formed on thesecond housing 30 b and extends from an end of theconnection base 31 b. The interior thread bore 39 b is coaxially formed in theexterior thread axle 64, and extends from an opposite end of theconnection base 31 b and toward theflange 32 b to communicate with thesecond passage 35 b. - The
second thread portion 36 b includes athird thread section 361 b and afourth thread section 362 b. Thethird thread section 361 b is arranged on the interior thread bore 39 b. Thefourth thread section 362 b is coaxially arranged on theexterior thread axle 64 and extends from theflange 32 b. Thethird thread section 361 b defines an diameter d4 which gradually increases in a direction away from theflange 32 b, which means it also gradually reduces in a direction away from thefirst passage 25 b. Therefore, thethird thread section 361 b is tapered off. - During assembly, referring to
FIG. 11 , thesecond thread portion 36 b engages with thefirst thread portion 26 b to enable thesecond housing 30 b connect thefirst housing 20 b until theflange 32 b of thesecond housing 30 b retains against the abuttingface 24 b, where an end of the interior thread bore 39 b stops. After completion of the assembly, thethird thread section 361 b of thesecond housing 30 b engages thefirst thread section 261 b of thefirst housing 20 b while thefourth thread section 362 b of thesecond housing 30 b engages thesecond thread section 262 b of thefirst housing 20 b. A predetermined gap is formed between thethird thread section 361 b and thefirst thread section 261 b. - The
spiral passage 12 b is formed between thethird thread section 361 b and thefirst thread section 261 b due to the predetermined gap. An end of thespiral passage 12 b communicates with thefirst passage 25 b of thefirst housing 20 b. An opposite end of thespiral passage 12 b communicates with thesecond passage 35 b of thesecond housing 30 b. Therefore, the water flows from thesecond passage 35 b to thespiral passage 12 b, and then goes into thefirst passage 25 b for water distribution. - The
first thread section 261 b of thefirst housing 20 b and thethird thread section 361 b of thesecond housing 30 b are tapered off. Dimensions of thespiral passage 12 b is able to adjust by a rotation of thefirst housing 20 b without disengagement between the first andsecond housings -
FIGS. 12 to 13 pertain to a low-flow emitter 10 c according to a fourth embodiment of the invention, which is similar to the first embodiment in that thefirst housing 20 c includes afirst thread portion 26 c, thesecond housing 30 c includes asecond thread portion 36 c, and a spiral passage is formed between the first thread portion and the second thread portion. - A
first thread section 261 c and asecond thread section 262 c are formed on afirst thread portion 26 c of thefirst housing 20 c and are connected with each other; athird thread section 361 c and afourth thread section 362 c are formed on afirst thread portion 36 c of thesecond housing 30 c and are not connected with each other. Twoorifices 351 c are oppositely and radially formed on thesecond thread portion 36 c. Each of theorifices 351 c are arranged between the third andfourth thread sections thread section 361 c from thefourth thread section 362 c. For more debris-resistant water flow, the first andthird thread sections third thread sections fourth thread sections - It should be apparent that a loose fitting thread connection between the first and second housings forms a spiral passage, creating an impeding flow path to adjust the water flow. On the other hand, a tight fitting thread connection part between the first and second housings enables secure engagement of the two housings. In addition, the first and second thread portions are defined a diameter being tapered off, user is able to adjust dimensions of the spiral passage by rotating the first housing relative to second housings.
- The preceding description is meant to be illustrative of preferred embodiments and should not be construed as limiting the scope of the present invention. Various modifications, which would be readily apparent to one skilled in the art, are intended to be within the scope of the present invention. Accordingly, the only limitations to the scope of the present invention are set forth in the following claims appended hereto.
Claims (13)
1. A low-flow emitter comprising:
a first housing including a thread bore and a first thread portion, the first thread portion is formed on the thread bore; the first thread portion including a first thread section and a second thread section;
a second housing including a thread axle and a second thread portion, the second thread portion is formed on the thread axle; the second thread portion including a third thread section corresponding with the first thread section of the first thread portion of the first housing, and a fourth thread section corresponding with the second thread section of the first thread portion of the first housing; the second housing connecting the first housing while the fourth thread section of the second thread portion of the second housing engaging with the second thread section of the first thread portion of the first housing;
a spiral passage defined between the third thread section of the second thread portion of the second housing and the first thread section of the first thread portion of the first housing;
a first passage formed on the first housing and communicating with the spiral passage; and
a second passage formed on the second housing and communicating with the spiral passage, and the spiral passage via an orifice radially formed on the second thread portion;
wherein the thread bore defines a diameter which increases in a direction away from the first passage;
wherein the thread axle defines a diameter which increases in a direction away from the first passage;
wherein the water flows from the second passage through the orifice to the spiral passage, and then enters the first passage for water distribution.
2. The low-flow emitter as claimed in claim 1 , wherein the thread bore defines an end communicating with the first passage.
3. The low-flow emitter as claimed in claim 1 , wherein the first and second thread sections are formed on the first thread portion of the first housing and connected with each other; the third and fourth thread sections are formed on the second thread portion of the second housing and connected with each other.
4. The low-flow emitter as claimed in claim 3 , wherein the third thread section of the second housing defines a crest with a crest height, and the first thread section of the first housing defines a root with a thread depth; the crest height of the third thread section of the second housing is less than the thread depth of the first thread section of the first housing, and the spiral passage is formed between the crest of the third thread section of the second housing and the root of the first thread section of the first housing.
5. The low-flow emitter as claimed in claim 4 , wherein the thread depth of the first thread section of the first housing equals to a thread depth of the second thread section of the first housing; the thread depth of the second thread section of the first housing equals to a height of a crest of the fourth thread section of the second housing.
6. The low-flow emitter as claimed in claim 1 , wherein the third thread section of the second housing defines a crest with a crest height, and the first thread section of the first housing defines a root with a thread depth; the crest height of the third thread section of the second housing is less than the thread depth of the first thread section of the first housing, and the spiral passage is formed between the crest of the third thread section of the second housing and the root of the first thread section of the first housing.
7. The low-flow emitter as claimed in claim 6 , wherein the thread depth of the first thread section of the first housing equals to a thread depth of the second thread section of the first housing; the thread depth of the second thread section of the first housing equals to a height of a crest of the fourth thread section of the second housing.
8. The low-flow emitter as claimed in claim 1 , wherein the first housing includes an end member, a circumference member bordering a periphery of the end member, a tubular head extending from an exterior face of the periphery of the end member in a direction away from the end member, and the thread bore extending from an interior face of the periphery of the end member in a direction away from the end member; the first passage is formed in the tubular head.
9. The low-flow emitter as claimed in claim 8 . wherein the second housing includes a flange retaining against an end of the thread bore of the first housing; the second thread portion extends from the flange in a direction away from the flange.
10. The low-flow emitter as claimed in claim 9 , wherein the width of the spiral passage is adjusted by rotation of the first housing, whereupon the second thread section of the first thread portion of the first housing move relative to the fourth thread section of the second thread portion.
11. The low-flow emitter as claimed in claim 1 , wherein the second housing includes a flange retaining against an end of the thread bore of the first housing; the second thread portion extends from the flange in a direction away from the flange.
12. The low-flow emitter as claimed in claim 11 , wherein the width of the spiral passage is adjusted by rotation of the first housing, whereupon the second thread section of the first thread portion of the first housing move relative to the fourth thread section of the second thread portion.
13. The low-flow emitter as claimed in claim 1 , wherein the width of the spiral passage is adjusted by rotation of the first housing, whereupon the second thread section of the first thread portion of the first housing move relative to the fourth thread section of the second thread portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/511,467 US20190336989A1 (en) | 2016-06-28 | 2019-07-15 | Low-flow emitter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/195,025 US10464081B2 (en) | 2016-06-28 | 2016-06-28 | Low-flow emitter |
US16/511,467 US20190336989A1 (en) | 2016-06-28 | 2019-07-15 | Low-flow emitter |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/195,025 Division US10464081B2 (en) | 2016-06-28 | 2016-06-28 | Low-flow emitter |
Publications (1)
Publication Number | Publication Date |
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US20190336989A1 true US20190336989A1 (en) | 2019-11-07 |
Family
ID=60674924
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/195,025 Active 2036-10-09 US10464081B2 (en) | 2016-06-28 | 2016-06-28 | Low-flow emitter |
US16/511,467 Abandoned US20190336989A1 (en) | 2016-06-28 | 2019-07-15 | Low-flow emitter |
US16/574,577 Abandoned US20200009587A1 (en) | 2016-06-28 | 2019-09-18 | Low-flow emitter |
US16/574,758 Abandoned US20200009588A1 (en) | 2016-06-28 | 2019-09-18 | Low-flow emitter |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/195,025 Active 2036-10-09 US10464081B2 (en) | 2016-06-28 | 2016-06-28 | Low-flow emitter |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/574,577 Abandoned US20200009587A1 (en) | 2016-06-28 | 2019-09-18 | Low-flow emitter |
US16/574,758 Abandoned US20200009588A1 (en) | 2016-06-28 | 2019-09-18 | Low-flow emitter |
Country Status (1)
Country | Link |
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US (4) | US10464081B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107420587A (en) * | 2017-06-28 | 2017-12-01 | 恺霖卫浴科技(厦门)有限公司 | A kind of flow control assembly and gondola water faucet |
US11441699B2 (en) * | 2018-11-20 | 2022-09-13 | John Faiczak | Differential pressure loss valve |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US982106A (en) * | 1908-12-11 | 1911-01-17 | John Edward Thornycroft | Liquid-sprayer. |
US1108728A (en) * | 1912-10-07 | 1914-08-25 | Alexander Ewing | Liquid-fuel burner. |
FR885826A (en) | 1942-05-15 | 1943-09-27 | Refining and homogenization of pasty or semi-liquid materials | |
US2783094A (en) | 1953-11-04 | 1957-02-26 | Ulchek Tool Company | Plastic hose nozzle |
US2723879A (en) * | 1954-04-26 | 1955-11-15 | John C Martin | Water control and distributor device |
US4044991A (en) * | 1975-10-06 | 1977-08-30 | Consolidated Controls Corporation | High energy loss fluid flow control device |
US4722481A (en) * | 1986-05-05 | 1988-02-02 | Jack Lemkin | Adjustable drip emitter |
US6981689B2 (en) | 2004-04-08 | 2006-01-03 | Gueorgui Milev Mihaylov | Hybrid flow metering valve |
CN202238389U (en) | 2011-09-08 | 2012-05-30 | 甘肃大禹节水集团股份有限公司 | Adjustable-flow threaded water dropper |
-
2016
- 2016-06-28 US US15/195,025 patent/US10464081B2/en active Active
-
2019
- 2019-07-15 US US16/511,467 patent/US20190336989A1/en not_active Abandoned
- 2019-09-18 US US16/574,577 patent/US20200009587A1/en not_active Abandoned
- 2019-09-18 US US16/574,758 patent/US20200009588A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US10464081B2 (en) | 2019-11-05 |
US20170367275A1 (en) | 2017-12-28 |
US20200009587A1 (en) | 2020-01-09 |
US20200009588A1 (en) | 2020-01-09 |
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