US20050169776A1 - Hydraulic gravity ram pump - Google Patents

Hydraulic gravity ram pump Download PDF

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Publication number
US20050169776A1
US20050169776A1 US10/765,979 US76597904A US2005169776A1 US 20050169776 A1 US20050169776 A1 US 20050169776A1 US 76597904 A US76597904 A US 76597904A US 2005169776 A1 US2005169776 A1 US 2005169776A1
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US
United States
Prior art keywords
liquid
piston
passageway
cylinder
reload chamber
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
Application number
US10/765,979
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English (en)
Inventor
Richard McNichol
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US10/765,979 priority Critical patent/US20050169776A1/en
Priority to US10/587,903 priority patent/US7967578B2/en
Priority to EP20050706422 priority patent/EP1714031B1/en
Priority to MXPA06008420A priority patent/MXPA06008420A/es
Priority to AU2005207990A priority patent/AU2005207990B2/en
Priority to DK05706422T priority patent/DK1714031T3/da
Priority to PCT/CA2005/000096 priority patent/WO2005073555A1/en
Priority to CA 2554856 priority patent/CA2554856C/en
Priority to AT05706422T priority patent/ATE451551T1/de
Priority to JP2006549817A priority patent/JP2007519849A/ja
Priority to RU2006130682A priority patent/RU2362050C2/ru
Priority to DE200560018169 priority patent/DE602005018169D1/de
Publication of US20050169776A1 publication Critical patent/US20050169776A1/en
Priority to HK07104319A priority patent/HK1098186A1/xx
Priority to AU2011201523A priority patent/AU2011201523B2/en
Priority to US13/169,243 priority patent/US8535017B2/en
Priority to US13/837,326 priority patent/US9115710B2/en
Priority to US13/965,009 priority patent/US8932030B2/en
Priority to US14/594,023 priority patent/US20150125315A1/en
Priority to US14/833,019 priority patent/US20160186739A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/107—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
    • F04B9/1076—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring with fluid-actuated inlet or outlet valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
    • F04B47/08—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B47/00—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps
    • F04B47/06—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth
    • F04B47/08—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid
    • F04B47/10—Pumps or pumping installations specially adapted for raising fluids from great depths, e.g. well pumps having motor-pump units situated at great depth the motors being actuated by fluid the units or parts thereof being liftable to ground level by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/103—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber
    • F04B9/107—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring

Definitions

  • This invention relates to pumps, and in particular to piston type pumps for pumping liquids to significantly higher elevations and pumps having energy recovery means.
  • a piston type pumping apparatus comprising a vertically oriented cylinder having a top and a bottom with a first passageway for liquid in the cylinder adjacent to the top thereof. There is a second passageway for liquid in the cylinder adjacent to the bottom thereof.
  • a piston is reciprocatingly mounted within the cylinder. The piston has an area against which pressure acts in the direction of movement of the piston.
  • a hollow piston rod is connected to the piston and extends slidably and sealingly through an aperture in the bottom of the cylinder.
  • the piston rod has a smaller area within the reload chamber upon which pressurized fluid in the reload chamber acts in a direction of movement of the piston and piston rod, compared to the area of the piston, whereby liquid in the cylinder acting downwardly on the piston exerts a greater force on the piston than liquid in the reload chamber acting against the piston rod.
  • a fourth passageway for liquid extends from the reload chamber to a source of liquid to be pumped.
  • a second one-way valve in the fourth passageway permits liquid to flow from the source of liquid into the reload chamber and prevents liquid from flowing from the reload chamber towards the source of liquid.
  • There is means for storing pressurized liquid connected to the second passageway for storing pressurized liquid displaced from below the piston, as the piston moves downwardly, and to assist in raising the piston and, accordingly, liquid contained within the piston rod, to pump liquid upwardly and through the first passageway.
  • the means for storing may include a pressurized body of liquid.
  • the pump is a piston pump.
  • the body of liquid may be a vertical column of liquid.
  • the pump may be a rotary pump and the means for storing may include a receiver for pressurized liquid connected to the pump.
  • the invention offers significant advantages compared with conventional pumps for deep wells, pumping out mines and other applications for pumping liquids up relatively high hydraulic heads, such as energy recovery at hydro dams. It allows the use of a pump which requires far less energy input to pump liquids up significant vertical distances because it converts the potential energy of the standing column into kinetic energy. At the same time, it overcomes disadvantages associated with prior art pumps of the general type by increasing its efficiency significantly by comparison. Thus the invention is attractive for commercial applications where prior art devices have not proven to be viable.
  • FIG. 1 is a simplified elevational view, partly in section, of a pumping apparatus according to an embodiment of the invention
  • FIG. 2 is a simplified elevational view, partly in section, of the upper fragment of an alternative embodiment employing a centrifugal pump;
  • FIG. 3 is a graph of the efficiency of the pressure head concept of the pump
  • FIG. 4 is a sectional view of the embodiment of FIG. 1 showing the Force Balance in the pump
  • FIGS. 5 a and 5 b are simplified sectional views showing Pressure Head Concept of a pump and the Power Cylinder Concept of the pump.
  • FIG. 1 shows a piston type pumping apparatus 20 according to an embodiment of the invention.
  • the apparatus is intended to pump liquids, typically water, up relatively great vertical distances, such as from the bottom of a mine to the surface as exemplified by the distance between points 22 and 24 .
  • the system includes a vertically oriented first transfer cylinder 26 having a top 28 , adjacent point 24 , and a bottom 30 .
  • a transfer piston 40 is reciprocatingly mounted within the cylinder and is connected to a vertically oriented, hollow piston rod 42 which extends slidably and sealingly through aperture 44 in the bottom of the cylinder.
  • the piston 40 has an area 29 at the top thereof against which pressurized fluid in the cylinder acts.
  • the passageway 32 is above or adjacent to the uppermost position of the piston and the passageway 34 is below its lowermost position.
  • first one-way valve 41 at the bottom of the piston rod 42 which includes a valve member 43 and a valve seat 45 which extends about a third passageway 47 in bottom 49 of the piston rod. This one-way valve allows liquid to flow into the piston rod, but prevents a reverse flow out the bottom of the piston rod.
  • a reload chamber 46 below the cylinder 26 which is sealed, apart from aperture 48 at top 50 thereof, which slidably and sealingly receives piston rod 42 , and fourth passageway 52 at bottom 54 thereof.
  • the piston rod acts as a piston within the reload chamber.
  • a second one-way valve 56 is located at the passageway 52 and includes a valve member in the form of ball 58 and a valve seat 60 adjacent to the bottom of the reload chamber.
  • This one-way valve allows liquid to flow from a source chamber 70 into the reload chamber 46 , but prevents liquid from flowing from the reload chamber towards the chamber 70 .
  • Chamber 70 contains liquid to be pumped out of passageway 32 at top of the cylinder.
  • the piston 40 has a diameter D1 which is substantially greater than diameter D2 of the piston rod and, accordingly, the piston rod, acting as a piston in the reload chamber, has a significantly smaller area upon which pressurized liquid acts, in the direction of movement of the piston rod and piston 40 , within the reload chamber 46 compared to the cross-sectional area of the piston 40 and the interior of cylinder 26 .
  • the piston is 3′′ in diameter, while the piston rod 42 is 1′′ in diameter. Therefore liquid in the cylinder at a given pressure exerts a much greater force on the piston and piston rod compared to the force exerted upwardly on the piston rod and piston by a similar pressure of liquid in reload chamber 70 .
  • the means 80 for storing pressurized liquid 82 connected to the second passageway 34 .
  • This means 80 stores pressurized liquid recovered from chamber 90 in the cylinder 26 below the piston 40 .
  • the means includes a column of liquid 92 extending from passageway 34 to a point 94 at the top of the column.
  • the column in this example is formed by an annular jacket 96 extending about the cylinder 26 and a conduit 98 extending to discharge end 100 of a second, power cylinder 102 .
  • the column can be pressurized by a remotely located power cylinder or by using a body of liquid (water), located at a higher elevation, as a pressure head.
  • the cylinder 102 has a piston 104 reciprocatingly mounted therein.
  • the liquid 82 occupies chamber 106 on side 108 of the piston which faces discharge end 100 of the cylinder.
  • Chamber 110 on the opposite side of the piston is vented to atmosphere through passageway 112 .
  • the cylinder 26 is filled with liquid, typically water, above the piston 40 .
  • chamber 90 is filled with water along with the jacket 96 and chamber 106 of the second cylinder 102 .
  • piston rod 42 is filled with water or other liquid along with the reload chamber 46 and the source chamber 70 .
  • the piston is in the lowermost position as shown in FIG. 1 . This is required to prime the pump.
  • the piston rod 114 is then moved to the left, from the point of view of FIG. 1 , typically by a motor or engine with a crank mechanism or a pneumatic or hydraulic device, although this could be done in other ways.
  • This displaces liquid 82 from the cylinder 102 downwardly through the column 92 , through the second passageway 34 into the chamber 90 where it acts upwardly against the bottom of piston 40 and pushes the piston upwards in the cylinder 26 .
  • the piston rod 42 is pushed upwardly along with the piston and thereby reduces pressure in reload chamber 46 , since the volume occupied by the piston rod in the reload chamber is reduced as the piston rod moves upwardly.
  • One-way valve 41 prevents liquid from flowing from the piston rod into the reload chamber, but the reduced pressure within the reload chamber causes ball 58 to rise off of its seat 60 , such that liquid flows from chamber 70 into the reload chamber.
  • the piston rod 42 is forced downwardly into the reload chamber 46 .
  • This increases pressure in the reload chamber and keeps the ball 58 against valve seat 60 to prevent liquid from flowing back into the source chamber 70 through the passageway 52 .
  • the liquid in the reload chamber is thus forced upwardly into the piston rod 42 by raising valve member 43 off of valve seat 45 .
  • a portion of the liquid in reload chamber 46 which had flowed into the reload chamber from the source chamber as the piston was previously raised, moves from the reload chamber into the piston rod and refills the cylinder 26 above the piston 40 as the piston moves downwardly towards its lowermost position shown in FIG. 1 .
  • the piston 104 in the cylinder 102 is then pushed again to the left, from the point of view of FIG. 1 , and again raises the piston 40 .
  • a volume of liquid equal to the volume of liquid which moved into the piston rod 42 from the reload chamber 46 , as the piston 40 previously moved downwards, is then discharged from passageway 32 as the piston 40 approaches its uppermost position and piston 102 approaches its position closest to the discharge end 100 of cylinder 102 .
  • the pump apparatus described above is capable of pumping liquid from point 22 to point 32 as described above.
  • the apparatus is capable of pumping liquid against a significant hydraulic head, such as experienced in pumping water from the bottom of a mine, without requiring a pump with a high hydraulic head output.
  • liquid in column 92 acts upwardly against the bottom of the piston 40 and assists the movement of the piston 104 towards the left, from the point of view of FIG. 1 .
  • the piston 40 is moved downwardly by the weight of liquid in cylinder 26 above the piston, it moves the liquid in chamber 90 upwardly, increasing its hydraulic head and building up its potential energy.
  • potential energy represented by the liquid in column 92 extending to cylinder 102 .
  • the cylinder 102 should be placed as high as possible for the maximum recovery of the energy. It should be understood that the position of cylinder 102 could be different than shown in FIG. 1 . It could be, for example, oriented vertically.
  • the terms “left” and “right” used above in relation to the cylinder, piston and piston rod are to assist in understanding the invention and are not intended to cover all possible orientations of the invention.
  • FIG. 2 shows a pumping apparatus 20 . 1 which is generally similar to the apparatus shown in FIG. 1 with like parts having like numbers with the addition of “ 0 . 1 ”. It is herein described only with respect to the differences between the two embodiments. Only the upper portion of the apparatus is shown, the reload chamber and source chamber being omitted because they are identical to the first embodiment.
  • passageway 34 . 1 is fitted with a one-way valve 120 which permits liquid to flow from chamber 90 . 1 into conduit 122 , but prevents liquid from flowing in the opposite direction.
  • the conduit 122 is connected to a receiver 124 which may be similar in structure to a hydraulic accumulator, for example, and is capable of storing pressurized hydraulic fluid. When the piston 40 . 1 is moved downwardly by the liquid in cylinder 26 . 1 , it is forced into the receiver 124 .
  • a hydraulic conduit 126 which connects the receiver to a centrifugal pump 128 which is connected to passageway 130 in the cylinder 26 . 1 below the piston 40 . 1 via a conduit 132 .
  • pump 128 is started to pump liquid from the receiver 124 into the chamber 90 . 1 to lift the piston 40 . 1 .
  • the fact that the liquid in the receiver 124 was pressurized during the previous downward movement of piston 40 . 1 reduces the work required from pump 128 to assist in raising the piston.
  • this apparatus operates in a manner analogous to the embodiment of FIG. 1 , but uses the receiver to store pressurized hydraulic fluid instead of utilizing a physical, vertical hydraulic head as in the previous embodiment.
  • a centrifugal pump 128 is employed instead of the piston pump comprising cylinder 102 and piston 104 of the previous embodiment. Otherwise this apparatus operates in a similar manner.
  • FIGS. 1 through 5 Referring to FIGS. 1 through 5 :
  • FIG. 3 Attached as FIG. 3 is a performance curve for the pressure head concept showing the efficiency against the ratio A 2 /A 1 Also included as Table 1 are the calculations from which FIG. 3 is drawn showing the absolute numeric variations as parameters are changed.
  • TABLE 1 Efficiency vs A2/A1 A2/A1 P2/P1 0.4 0.5 0.6 0.7 0.8 0.82 1.5 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 1.8 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 2.0 41.4% 0.0% 0.0% 0.0% 0.0% 0.0% 2.5 31.6% 45.7% 0.0% 0.0% 0.0% 3.0 25.5% 37.2% 53.3% 0.0% 0.0% 0.0% 4.0 18.5% 27.1% 39.3% 59.1% 0.0% 0.0% 5.0 14.5% 21.3% 31.2% 47.1% 0.0% 0.0% 7.5 9.4% 13.9% 20.5% 31.3% 53.7% 61.1% 10 6.9% 10.3% 15.3% 23.5% 40.2% 45.8% Optimum 26.6% 315.% 36.0% 40.7% 46
  • the curves demonstrate that a pump could approach an efficiency of up to 61% if used in applications where a very high pressure head is available and the power water can be discharged at a very low level, both compared to the height of the standing column.
  • Efficient pump designs have a high A 2 /A 1 ratio indicating that the volume of water discharged from the standing column is greater than the volume of water used on the power side of the transfer piston. This feature indicates that the pump may be attractive in lifting water from a well or de-watering a mine as long as there is a convenient source of suitable power water; i.e. compatible with the water to be lifted and having a very high head.
  • a pressure head pump could be attractive in some run-of-the-river hydro applications if a suitable source of power water is convenient.
  • the curves indicate that the higher the A 2 /A 1 ratio the more efficient the pump, and the lower the accelerations the more efficient the pump.
  • Efficient pressure head concept pumps move a greater volume of process water per stroke than the volume of power water required. This again is a direct result of the high ratios of A 2 /A 1 This means that the power water could be released to join the process water and still allow effective pumping to occur. Conversely, pumps with low ratios of A 2 /A 1 but with a large amount of power water and a lower head can move smaller amounts of process water up greater heights. They will expend more power water than the process water they move. This process is similar to the classic hydraulic ram principle where a large amount of fluid at a low pressure head is used to transfer a small amount of fluid up a higher elevation.
  • a different embodiment of the pump utilizes a bladder similar to a pressure tank in a water system or a packer similar to a drill hole packer that houses the water in the power cylinder that is pressurized by air or hydraulic pressure and then the pressure lowered and again repressurized. This allows the use of the pump without expending the power fluid.
  • FIG. 5 shows the two main embodiments of the pump.
  • FIG. 5A describes the pressure head concept showing how the liquid, generally water, stored at a higher elevation 83 supplies excess pressure for the power stroke 85 and reduced pressure 87 when point 89 is used for the power fluid release.
  • FIG. 5B shows the power cylinder concept where the excess pressure is generated by the power cylinder 102 and the recovery stroke is augmented by the creation of a vacuum when piston 104 is withdrawn from the column of power fluid.
  • valves were manipulated to calculate the efficiency of various pressure head arrangements. The manipulation required:
  • the ratio A 2 /A 1 must be high.
  • the power water in a pressure head style pump must be released very low relative to the height of the standing column.
  • the power column must be very tall relative to the standing column.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US10/765,979 2004-01-29 2004-01-29 Hydraulic gravity ram pump Abandoned US20050169776A1 (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
US10/765,979 US20050169776A1 (en) 2004-01-29 2004-01-29 Hydraulic gravity ram pump
JP2006549817A JP2007519849A (ja) 2004-01-29 2005-01-27 水圧式ラムポンプ
RU2006130682A RU2362050C2 (ru) 2004-01-29 2005-01-27 Гидравлический плунжерный насос
MXPA06008420A MXPA06008420A (es) 2004-01-29 2005-01-27 Bomba de ariete hidraulico.
AU2005207990A AU2005207990B2 (en) 2004-01-29 2005-01-27 Hydraulic ram pump
DK05706422T DK1714031T3 (da) 2004-01-29 2005-01-27 Hydraulisk stempelpumpe
PCT/CA2005/000096 WO2005073555A1 (en) 2004-01-29 2005-01-27 Hydraulic ram pump
CA 2554856 CA2554856C (en) 2004-01-29 2005-01-27 Hydraulic ram pump
AT05706422T ATE451551T1 (de) 2004-01-29 2005-01-27 Hydraulikzylinderpumpe
US10/587,903 US7967578B2 (en) 2004-01-29 2005-01-27 Hydraulic gravity ram pump
EP20050706422 EP1714031B1 (en) 2004-01-29 2005-01-27 Hydraulic ram pump
DE200560018169 DE602005018169D1 (de) 2004-01-29 2005-01-27 Hydraulikzylinderpumpe
HK07104319A HK1098186A1 (en) 2004-01-29 2007-04-24 Hydraulic ram pump
AU2011201523A AU2011201523B2 (en) 2004-01-29 2011-04-05 Hydraulic ram pump
US13/169,243 US8535017B2 (en) 2004-01-29 2011-06-27 Hydraulic gravity ramp pump
US13/837,326 US9115710B2 (en) 2004-01-29 2013-03-15 Coaxial pumping apparatus with internal power fluid column
US13/965,009 US8932030B2 (en) 2004-01-29 2013-08-12 Hydraulic gravity ram pump
US14/594,023 US20150125315A1 (en) 2004-01-29 2015-01-09 Hydraulic gravity ram pump
US14/833,019 US20160186739A1 (en) 2004-01-29 2015-08-21 Coaxial pumping apparatus with internal power fluid column

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/765,979 US20050169776A1 (en) 2004-01-29 2004-01-29 Hydraulic gravity ram pump

Related Child Applications (3)

Application Number Title Priority Date Filing Date
PCT/CA2005/000096 Continuation-In-Part WO2005073555A1 (en) 2004-01-29 2005-01-27 Hydraulic ram pump
US10/587,903 Continuation-In-Part US7967578B2 (en) 2004-01-29 2005-01-27 Hydraulic gravity ram pump
US11/587,903 Continuation-In-Part US8107123B2 (en) 2004-04-30 2005-03-29 Tone correction apparatus, mobile terminal, image capturing apparatus, mobile phone, tone correction method and program for improve local contrast in bright and dark regions

Publications (1)

Publication Number Publication Date
US20050169776A1 true US20050169776A1 (en) 2005-08-04

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ID=34807574

Family Applications (5)

Application Number Title Priority Date Filing Date
US10/765,979 Abandoned US20050169776A1 (en) 2004-01-29 2004-01-29 Hydraulic gravity ram pump
US10/587,903 Active 2026-06-04 US7967578B2 (en) 2004-01-29 2005-01-27 Hydraulic gravity ram pump
US13/169,243 Expired - Lifetime US8535017B2 (en) 2004-01-29 2011-06-27 Hydraulic gravity ramp pump
US13/965,009 Expired - Lifetime US8932030B2 (en) 2004-01-29 2013-08-12 Hydraulic gravity ram pump
US14/594,023 Abandoned US20150125315A1 (en) 2004-01-29 2015-01-09 Hydraulic gravity ram pump

Family Applications After (4)

Application Number Title Priority Date Filing Date
US10/587,903 Active 2026-06-04 US7967578B2 (en) 2004-01-29 2005-01-27 Hydraulic gravity ram pump
US13/169,243 Expired - Lifetime US8535017B2 (en) 2004-01-29 2011-06-27 Hydraulic gravity ramp pump
US13/965,009 Expired - Lifetime US8932030B2 (en) 2004-01-29 2013-08-12 Hydraulic gravity ram pump
US14/594,023 Abandoned US20150125315A1 (en) 2004-01-29 2015-01-09 Hydraulic gravity ram pump

Country Status (12)

Country Link
US (5) US20050169776A1 (es)
EP (1) EP1714031B1 (es)
JP (1) JP2007519849A (es)
AT (1) ATE451551T1 (es)
AU (2) AU2005207990B2 (es)
CA (1) CA2554856C (es)
DE (1) DE602005018169D1 (es)
DK (1) DK1714031T3 (es)
HK (1) HK1098186A1 (es)
MX (1) MXPA06008420A (es)
RU (1) RU2362050C2 (es)
WO (1) WO2005073555A1 (es)

Cited By (12)

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US20080219869A1 (en) * 2007-01-30 2008-09-11 Norm Fisher Coaxial pumping apparatus with internal power fluid column
WO2008128483A2 (en) 2007-04-18 2008-10-30 Pavel Simka Heat pump system and method for pumping liquids
US8535017B2 (en) 2004-01-29 2013-09-17 Richard Frederick McNichol Hydraulic gravity ramp pump
US20130302182A1 (en) * 2010-10-08 2013-11-14 Thomas C.B. Smith Pumping apparatus and methods
US20130327033A1 (en) * 2008-04-09 2013-12-12 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US9115710B2 (en) 2004-01-29 2015-08-25 Richard F. McNichol Coaxial pumping apparatus with internal power fluid column
EP2435701A4 (en) * 2009-05-27 2017-05-24 Impact Technology Systems AS Apparatus employing pressure transients for transporting fluids
US9803442B2 (en) 2010-06-17 2017-10-31 Impact Technology Systems As Method employing pressure transients in hydrocarbon recovery operations
US9863225B2 (en) 2011-12-19 2018-01-09 Impact Technology Systems As Method and system for impact pressure generation
US20180373453A1 (en) * 2017-06-27 2018-12-27 Western Digital Technologies, Inc. Methods of using embedded disconnected circuits in magnetic storage media of data storage devices
WO2019018565A1 (en) * 2017-07-18 2019-01-24 Daniel E. Altman HYDRAULIC PUMPING SYSTEM
CN113623197A (zh) * 2021-09-06 2021-11-09 谢雄伟 一种变频水泵

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Publication number Priority date Publication date Assignee Title
CN102207067A (zh) * 2011-05-04 2011-10-05 全栋(南京)太阳能光伏有限公司 推进式清水泵
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US8932030B2 (en) 2015-01-13
US20110255997A1 (en) 2011-10-20
CA2554856C (en) 2009-12-15
EP1714031B1 (en) 2009-12-09
RU2362050C2 (ru) 2009-07-20
EP1714031A4 (en) 2007-04-18
US20070172364A1 (en) 2007-07-26
ATE451551T1 (de) 2009-12-15
AU2005207990A1 (en) 2005-08-11
US20150125315A1 (en) 2015-05-07
JP2007519849A (ja) 2007-07-19
CA2554856A1 (en) 2005-08-11
US7967578B2 (en) 2011-06-28
AU2011201523A1 (en) 2011-04-28
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US8535017B2 (en) 2013-09-17
US20130323086A1 (en) 2013-12-05
EP1714031A1 (en) 2006-10-25
DE602005018169D1 (de) 2010-01-21
WO2005073555A1 (en) 2005-08-11
MXPA06008420A (es) 2006-12-14

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