US20040042907A1 - Ram pump - Google Patents
Ram pump Download PDFInfo
- Publication number
- US20040042907A1 US20040042907A1 US10/650,699 US65069903A US2004042907A1 US 20040042907 A1 US20040042907 A1 US 20040042907A1 US 65069903 A US65069903 A US 65069903A US 2004042907 A1 US2004042907 A1 US 2004042907A1
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- United States
- Prior art keywords
- waste
- valve member
- configuration
- pump
- check valve
- 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
Links
- 239000002699 waste material Substances 0.000 claims abstract description 156
- 239000012530 fluid Substances 0.000 claims abstract description 82
- 230000009969 flowable effect Effects 0.000 claims abstract description 13
- 230000006872 improvement Effects 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 10
- 230000007246 mechanism Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000004048 modification Effects 0.000 abstract description 9
- 238000012986 modification Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000008878 coupling Effects 0.000 description 6
- 238000010168 coupling process Methods 0.000 description 6
- 238000005859 coupling reaction Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 239000004606 Fillers/Extenders Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F7/00—Pumps displacing fluids by using inertia thereof, e.g. by generating vibrations therein
- F04F7/02—Hydraulic rams
Definitions
- the present invention relates to the field of hydraulic ram pumps.
- Hydraulic ram pumps also called water rams or ram pumps
- ram pumps are well-known devices that, using only a source of flowing fluid, can pump said fluid at relatively high pressure.
- known ram pumps can suffer from the need to utilize a large number of precision parts in the valving areas, at commensurate costs, in order to provide reliable, efficient pumping.
- an improved ram pump for use with a fluid source having an initial head.
- the ram pump is of the generally known type that has an intake manifold engagable with the fluid source, the intake manifold defining a waste outlet and a pump outlet therethrough.
- the ram pump is also of the generally known type that has a waste valve member selectively moveable between a waste configuration whereat the fluid source is flowable through the waste outlet and a closed configuration whereat the waste valve member sealingly obstructs flow of the fluid source through the waste outlet.
- the ram pump is of the generally known type that has a check valve member selectively moveable between a ram configuration whereat the check valve member substantially obstructs flow of the fluid source through the pump outlet and a pump configuration whereat the fluid source is flowable through the pump outlet.
- the ram pump is of the type that is generally known to urge the waste valve member towards the closed configuration when the check valve member is in the ram configuration and the waste valve member is in the waste configuration, and when the fluid source is at a first maximum head.
- the ram pump is also of the type that is generally known to urge the check valve member towards the pump configuration when the waste valve member is in the closed configuration and the check valve member is in the ram configuration, and when the fluid source is at a second maximum head.
- the ram pump is still further of the type that is generally known to urge the waste valve member towards the waste configuration when the check valve member is in the pump configuration and the waste valve member is in the closed configuration, and when the fluid source is at a first minimum head.
- the ram pump is yet further of the type that is generally known to urge the check valve member towards the ram configuration when the waste valve member is in the waste configuration and the check valve member is in the pump configuration, and when the fluid source is at a second minimum head.
- the improvement comprises the waste valve member being selectively moveable along a path having a vertical component between the default waste configuration and the closed configuration, with the waste valve member being gravity-biased towards the default waste configuration.
- the check valve member is selectively moveable along a substantially horizontal path between the ram configuration and the pump configuration, with the check valve member being biased towards the ram configuration, wherein the fluid source is substantially horizontally flowable through the pump outlet when the check valve member is in the pump configuration.
- a tubular skirt portion extends in a substantially downward direction from a peripheral portion of the waste valve member.
- the path having a vertical component comprises a substantially vertical axis.
- the intake manifold includes a waste valve body and a manifold casing engagable with the fluid source.
- the manifold casing securely engages a lower end portion of the waste valve body.
- the waste valve body defines in throughpassing relation a waste conduit extending between the lower end portion and an upper end portion of the waste valve body.
- the waste conduit is in fluid communication with the manifold casing substantially adjacent to the lower end portion and in fluid communication with the waste outlet substantially adjacent to the upper end portion of the waste valve body.
- the waste valve body includes an upper bearing mounted substantially adjacent to the upper end portion and a lower bearing mounted substantially adjacent to the lower end portion.
- a longitudinal upper piston portion of the waste valve member extends in a substantially upward direction from a central portion of the waste valve member and engages the upper bearing in throughpassing slidable relation.
- a longitudinal lower piston portion of the waste valve member extends in the substantially downward direction from the central portion of the waste valve member and engages the lower bearing in throughpassing slidable relation.
- a peripheral cushioning member extends transversely from the longitudinal upper piston portion.
- the peripheral cushioning member selectively engages the upper bearing when the waste valve member is in the default waste configuration.
- the substantially horizontal path comprises a substantially horizontal axis.
- the fluid source is substantially unobstructed by the check valve body when the check valve member is in the pump configuration.
- the fluid source is flowable through the pump outlet into a pressure vessel when the check valve member is in the pump configuration.
- the pressure vessel defines a vessel outlet and contains a substantially impermeable bladder membrane that is remotely positioned relative to both the pump outlet and the vessel outlet respectively.
- the bladder membrane encloses a buffer fluid that is elastically pressurized when the check valve member is in the pump configuration.
- the manifold casing, the check valve body, and the waste valve body are each respectively constructed from conventional valving mechanisms.
- FIG. 1 is a side elevational view of an improved ram pump according to a preferred embodiment of the invention showing, in phantom outline, the bladder membrane inside the pressure vessel.
- FIG. 2 is a partially exploded view of the structure of FIG. 1;
- FIG. 3 is an enlarged view of the waste valve body of FIG. 2 showing, in phantom outline, the waste valve member in the waste configuration;
- FIG. 4 is a partially sectional view along sight line 4 - 4 of FIG. 3 with the waste valve member in the closed configuration
- FIG. 5 is an enlarged sectional view of the check valve member of FIG. 2 shown in the ram configuration
- FIG. 6 is an enlarged sectional view of the check valve member of FIG. 2 shown in the pump configuration
- FIG. 7 is a front, bottom perspective partial view of the waste valve member of FIG. 4;
- FIG. 8 is a front, bottom perspective view of an extender according to a preferred embodiment of the invention.
- FIG. 9 is a view of the extender of FIG. 8, in use with the pump of FIG. 1.
- FIG. 1 there is shown an improved ram pump 20 for use with a fluid source (not shown) having an initial head.
- the ram pump 20 is of a type that has an intake manifold 22 engagable with the fluid source.
- the intake manifold 22 defines a waste outlet 36 and a threaded pump outlet 24 therethrough.
- the ram pump 20 also includes a waste valve member 42 that is selectively moveable between a waste configuration whereat the fluid source is flowable through the waste outlet 36 (as best seen in FIG. 3) and a closed configuration whereat the waste valve member 42 sealingly obstructs flow of the fluid source through the waste outlet 36 (as best seen in FIG. 4).
- the ram pump 20 also includes a check valve member 54 that is selectively moveable between a ram configuration whereat the check valve member 54 substantially obstructs flow of the fluid source through the pump outlet 24 (as best seen in FIG. 5) and a pump configuration whereat the fluid source is flowable through the pump outlet 24 (as best seen in FIG. 6).
- the fluid source is flowable through the pump outlet 24 into a pressure vessel 70 when the check valve member 54 is in the pump configuration.
- the pressure vessel 70 includes a vessel cap member 78 and a hollow vessel body 80 that defines a threaded vessel outlet 72 .
- the hollow vessel body 80 has a closed end 82 and an open end 84 and is in fluid communication with the vessel outlet 72 which is intermediate the closed end 82 and the open end 84 .
- the vessel cap member 78 sealingly and threadingly engages the open end 84 of the vessel body 80 , and in this regard, the open end 84 of the hollow vessel body 80 is provided with threads 86 to sealingly engage, in use, corresponding threads 88 provided on the vessel cap member 78 .
- the vessel cap member 78 has a vessel inlet 79 formed therethrough, and is rigidly connected, by welding or the like, to the manifold casing 26 .
- the vessel inlet 79 of the vessel cap member 78 and the pump outlet 24 of the manifold casing 26 are in fluid communication with one another.
- the pressure vessel 70 contains a substantially impermeable bladder membrane 74 that is positioned within the vessel body 80 adjacent the closed end 82 and remotely positioned relative to both the pump outlet 24 and the vessel outlet 72 respectively.
- the bladder membrane 74 encloses a buffer fluid 76 that is elastically pressurized when the check valve member 54 is in the pump configuration.
- the bladder membrane 74 which is constructed from rubber or a similar elastic material, may be filled with air or any other elastically pressurizable fluid.
- the intake manifold 22 includes a tubular waste valve body 28 and a manifold casing 26 that is engagable with the fluid source adjacent a threaded supply inlet 27 A thereof.
- the manifold casing 26 is in fluid communication with the pump outlet 24 of the intake manifold 22 and has a threaded waste body port 27 B.
- the manifold casing 26 may be formed from a conventional 2′′ tee fitting, constructed out of 316-1 stainless steel and having a 1 ⁇ 4′′ wall thickness.
- the threaded waste body port 27 B of the manifold casing 26 securely, sealingly and threadingly engages a lower end portion 30 of the waste valve body 28 .
- the waste valve body 28 defines in throughpassing relation a waste conduit 32 extending between the lower end portion 30 and an upper end portion 34 of the waste valve body 28 .
- the waste conduit 32 is in fluid communication with the manifold casing 26 substantially adjacent to the lower end portion 30 and in fluid communication with the waste outlet 36 substantially adjacent to the upper end portion 34 of the waste valve body 28 .
- the waste valve body 28 also defines a constricted portion 33 of the waste conduit 32 that is intermediate of the lower end portion 30 and the waste outlet 36 , and has a smaller cross-sectional area than some other portions of the waste conduit 32 .
- the constricted portion 33 has a seat portion 33 A.
- the waste valve body also includes an upper bearing 38 rigidly mounted, by welding or the like, substantially adjacent to the upper end portion 34 and a lower bearing 40 rigidly mounted, by welding or the like, substantially adjacent to the lower end portion 30 .
- a longitudinal upper piston portion 50 of the waste valve member 42 extends in a substantially upward direction “D” from a central portion 48 of the waste valve member 42 .
- the longitudinal upper piston portion 50 extends through the constricted portion 33 of the waste conduit 32 , through the waste outlet 36 , and engages the upper bearing 38 in throughpassing slidable relation.
- the upper piston portion 50 has a threaded upper end portion 51 .
- a longitudinal lower piston portion 52 of the waste valve member 42 extends in the substantially downward direction “C” from the central portion 48 of the waste valve member 42 .
- the longitudinal lower piston portion 52 engages the lower bearing 40 in throughpassing slidable relation.
- the upper and lower piston portions, 50 and 52 move with the waste valve member 42 between the waste and the closed configurations.
- a peripheral cushioning member 60 extends transversely from the longitudinal upper piston portion 50 .
- the peripheral cushioning member 60 includes a conventional nut or fastening member 62 threadingly engaging the threaded upper end portion 51 of the upper piston portion 50 of the waste valve member 42 .
- the peripheral cushioning member 60 also includes a compressible pad member 64 positioned about the upper piston portion 50 and securely engaging the fastening member 62 .
- a reinforcing ring member 66 securely engages the compressible pad member 64 in circumferential relation.
- the waste valve member 42 is selectively moveable, in use, along a path having a vertical component, and preferably along a substantially vertical axis A-A, between the default waste configuration and the closed configuration, such that the waste valve member 42 is gravity-biased towards the lower end portion 30 of the waste valve body 28 and towards the default waste configuration.
- the peripheral cushioning member 60 and more specifically the compressible pad member 64 , selectively engages the upper bearing 38 when the waste valve member 42 is in the default waste configuration.
- a tubular skirt portion 46 extends in a substantially downward direction “C” from a peripheral portion 44 of the waste valve member 42 .
- the tubular skirt portion 46 has a circumference slightly smaller than the base of the peripheral portion 44 , and slightly larger than the constricted portion 33 .
- the peripheral portion 44 securely engages a peripheral O-ring member 45 that sealingly engages the seat portion 33 A when the waste valve member 42 is in the closed configuration.
- the waste valve body 28 and the waste valve member 42 may together be constructed from a 1 1 ⁇ 2′′ nominal OD threaded coupling 100 and a conventional 1 1 ⁇ 4′′ stainless steel gravity-biased check valve 102 , modified as follows: in the provision of the skirt portion 46 ; in the placement of the bearings 38 , 40 ; in the provision of the cushioning member 60 ; and in the provision of the constricted portion 33 .
- the check valve member 54 is selectively moveable, in use, along a substantially horizontal path, and preferably along a substantially horizontal axis B-B, between the ram configuration and the pump configuration.
- the check valve member 54 is spring biased towards the ram configuration by a spring member 58 C.
- the check valve member 54 also includes a check valve body 56 and a valve cap member 58 .
- the spring member 58 C is mounted to the check valve body 56 and to the valve cap member 58 to bias the valve cap member 58 for movement towards the ram configuration.
- the check valve body 56 has a downstream end 57 B, an internally threaded portion 57 A, and a threaded check valve coupling 55 sealingly, threadingly engaged within the internally threaded portion 57 A of the check valve body 56 .
- the check valve body 56 has a check valve seat 59 formed therein, substantially adjacent to the downstream end 57 B.
- the valve cap member 58 has a valve cap 58 A and a stem 58 B, and is mounted to the check valve body 56 .
- valve cap member 58 moves along the substantially horizontal axis B-B between the ram configuration whereat the valve cap 58 A rests on the check valve seat 59 to substantially obstruct flow of the fluid source through the pump outlet 24 and the downstream end 56 B of the check valve body 56 , as best seen in FIG. 5, and the pump configuration whereat the valve cap 58 A is disposed apart from the check valve seat 59 to permit substantially unobstructed fluid flow through the check valve member 54 , as best seen in FIG. 6.
- the check valve member 54 is disposed within the pressure vessel 70 .
- the threaded check valve coupling 55 extends from the internally threaded portion 57 A, through the vessel inlet 79 of the vessel cap member 78 , to securely, sealingly and threadingly engage the pump outlet 24 of the manifold casing 26 .
- the check valve member 54 of the preferred embodiment may be formed from a conventional 1 1 ⁇ 4 check valve, constructed of stainless steel, modified only by the removal of a tubular portion which, as purchased, extends slightly beyond the valve cap 70 when seated, so as to shield the same when in the check valve member is in the pump configuration. With this modification, and as best seen in FIG. 6, the fluid source is substantially horizontally flowable through the pump outlet 24 , and substantially unobstructed by the check valve body 56 , when the check valve member 54 is in the pump configuration.
- manifold casing 26 , the check valve body 54 , and the waste valve body 28 may each respectively be constructed from conventional valving mechanisms.
- the supply inlet 27 of the manifold casing 26 is coupled to the fluid source (not shown), so as to permit flowing water or some other fluid to enter the manifold casing 26 through the supply inlet 27 .
- the valve cap member 58 of the check valve member 54 being biased as aforementioned towards the ram configuration, substantially obstructs the flow of fluid into the pressure vessel 70 , causing fluid to instead flow into the waste valve body 28 , around the waste valve member 42 , which is initially positioned in the waste configuration as shown in FIG. 3, and out of the waste outlet 36 .
- the ram pump 20 is of a type that urges the waste valve member 42 towards the closed configuration when the check valve member 54 is in the ram configuration and the waste valve member 42 is in the waste configuration, and when the fluid source is at a first maximum head, namely, when the fluid source reaches a certain maximum speed through the waste outlet 36 sufficient to overcome the gravity-biasing of the waste valve member 42 towards the waste configuration. That is, the flowing force of said fluid source ultimately (i.e., at the first maximum head) drags the waste valve member 42 to the closed configuration, as best seen in FIG. 4, to sealingly obstruct flow through the waste outlet 36 .
- the momentum of the flowing water (a “water hammer”) from the fluid source causes a temporary increase in pressure within the manifold casing 26 to reach a second maximum head that is sufficient to overcome the bias of the spring member 58 C and permit a charge of water to enter the pressure vessel 70 , and to elastically pressurize the air or other fluid contained within the bladder membrane 74 . That is, the check valve member 54 is urged towards the pump configuration when the waste valve member 42 is in the closed configuration and the check valve member 54 is in the ram configuration, and when the fluid source is at the second maximum head.
- the waste valve member 42 tends to move, under force of gravity, away from the closed configuration and towards the waste configuration, as best seen in FIG. 3, since any drag forces (at the first maximum head) which may have previously caused it to move towards the closed configuration have dissipated and no longer exist, such that flow can again occur through the waste valve body 28 .
- the ram pump 20 urges the waste valve member 42 towards the waste configuration when the check valve member 54 is in the pump configuration and the waste valve member 42 is in the closed configuration, and when the fluid source is at the first minimum head.
- the check valve member 54 is urged towards the ram configuration when the waste valve member 42 is in the waste configuration and the check valve member 54 is in the pump configuration, and when the fluid source is at a second minimum head. That is, flow of the fluid source through the waste outlet 36 results in insufficient pressure within the manifold casing 26 to continue to resist the spring-biasing of the check valve member 54 towards the ram configuration, and therefore, the valve cap 70 in the check valve member 54 naturally returns to the ram configuration, thereby substantially obstructing further flow between the manifold casing 26 and the pressure vessel 70 .
- Adjustments to a stroke length and/or to an effective weight of the waste valve member 42 may need to be made to the ram pump 20 . Adjustments to the stroke length can be achieved simply by manipulation of the fastening member 62 of the cushioning member 60 , and sliding the pad member 64 and the reinforcing ring member 66 accordingly. Adjustments to the effective weight of the waste valve member 42 can be achieved by affixing a suitable weight to the threaded upper end portion 51 of the upper piston portion 50 .
- Nuts could be used. However, in circumstances where the water or other fluid is delivered to the supply inlet 27 at a substantial initial head or pressure, substantial forces may need to be applied to the upper piston portion 50 in order to overcome same. In such case, relatively more massive objects need be used.
- an extender 90 as illustrated in FIG. 8, may be threaded onto the threaded upper end portion 51 of the upper piston portion 50 in the manner illustrated in FIG. 9, to permit larger weights to be employed.
- the relatively high efficiency of the present invention is obtained inter alia through the modification of the check valve member 54 , as aforesaid, which is believed to improve flow characteristics between the manifold casing 26 and the pressure vessel 70 ; through the substantially horizontal orientation of the check valve member 54 along axis B-B; and through the provision of the skirt portion 46 and the constricted portion 33 , which are believed to provide an advantageous swirling flow (not shown) in the waste valve body 28 .
- the relatively high reliability of the present invention is obtained inter alia through the positioning of the upper and lower bearings 38 , 40 and in the provision of the cushion member 60 , which lessens the shock that would otherwise be placed on the waste valve member 42 .
- the use of conventional valving mechanisms, in part, is responsible for the relatively low cost of the structure.
- the vessel outlet 72 may be oriented along an axis that does not even have a vertical component (i.e., that is horizontal).
- the threaded coupling 100 may be provided with or without a constricted upper portion; such a constricted upper portion would serve to accelerate passage of the fluid source through the coupling 100 .
- Another modification that is specifically contemplated by the invention, and one that may be of particular application inter alia where there is a low existing stationary head, is that of a ram pump 20 provided without a pressure vessel 70 , that instead feeds fluid directly from the pump outlet 24 to an end user.
Abstract
An improved ram pump for use with a fluid source having an initial head. The ram pump is of a generally known type and the improvement includes modification of a waste valve member of the ram pump to be selectively moveable along a path having a vertical component between a default waste configuration and a closed configuration. The waste valve member is gravity-biased towards the default waste configuration. The improvement also includes modification of a check valve member of the ram pump to be selectively moveable along a substantially horizontal path between a ram configuration and a pump configuration. The check valve member is biased towards the ram configuration, and the fluid source is substantially horizontally flowable through a pump outlet of the ram pump when the check valve member is in the pump configuration.
Description
- The present invention relates to the field of hydraulic ram pumps.
- Hydraulic ram pumps, also called water rams or ram pumps, are well-known devices that, using only a source of flowing fluid, can pump said fluid at relatively high pressure. However, known ram pumps can suffer from the need to utilize a large number of precision parts in the valving areas, at commensurate costs, in order to provide reliable, efficient pumping. There is a need for a relatively efficient and reliable hydraulic ram pump that is relatively inexpensive to construct.
- In accordance with the present invention there is disclosed an improved ram pump for use with a fluid source having an initial head. The ram pump is of the generally known type that has an intake manifold engagable with the fluid source, the intake manifold defining a waste outlet and a pump outlet therethrough. The ram pump is also of the generally known type that has a waste valve member selectively moveable between a waste configuration whereat the fluid source is flowable through the waste outlet and a closed configuration whereat the waste valve member sealingly obstructs flow of the fluid source through the waste outlet. Further, the ram pump is of the generally known type that has a check valve member selectively moveable between a ram configuration whereat the check valve member substantially obstructs flow of the fluid source through the pump outlet and a pump configuration whereat the fluid source is flowable through the pump outlet. The ram pump is of the type that is generally known to urge the waste valve member towards the closed configuration when the check valve member is in the ram configuration and the waste valve member is in the waste configuration, and when the fluid source is at a first maximum head. The ram pump is also of the type that is generally known to urge the check valve member towards the pump configuration when the waste valve member is in the closed configuration and the check valve member is in the ram configuration, and when the fluid source is at a second maximum head. The ram pump is still further of the type that is generally known to urge the waste valve member towards the waste configuration when the check valve member is in the pump configuration and the waste valve member is in the closed configuration, and when the fluid source is at a first minimum head. The ram pump is yet further of the type that is generally known to urge the check valve member towards the ram configuration when the waste valve member is in the waste configuration and the check valve member is in the pump configuration, and when the fluid source is at a second minimum head. In accordance with the present invention, the improvement comprises the waste valve member being selectively moveable along a path having a vertical component between the default waste configuration and the closed configuration, with the waste valve member being gravity-biased towards the default waste configuration. The check valve member is selectively moveable along a substantially horizontal path between the ram configuration and the pump configuration, with the check valve member being biased towards the ram configuration, wherein the fluid source is substantially horizontally flowable through the pump outlet when the check valve member is in the pump configuration.
- According to a further aspect of the invention, a tubular skirt portion extends in a substantially downward direction from a peripheral portion of the waste valve member.
- According to another aspect of the invention, the path having a vertical component comprises a substantially vertical axis.
- According to a still further aspect of the invention, the intake manifold includes a waste valve body and a manifold casing engagable with the fluid source. The manifold casing securely engages a lower end portion of the waste valve body. The waste valve body defines in throughpassing relation a waste conduit extending between the lower end portion and an upper end portion of the waste valve body. The waste conduit is in fluid communication with the manifold casing substantially adjacent to the lower end portion and in fluid communication with the waste outlet substantially adjacent to the upper end portion of the waste valve body. The waste valve body includes an upper bearing mounted substantially adjacent to the upper end portion and a lower bearing mounted substantially adjacent to the lower end portion. A longitudinal upper piston portion of the waste valve member extends in a substantially upward direction from a central portion of the waste valve member and engages the upper bearing in throughpassing slidable relation. A longitudinal lower piston portion of the waste valve member extends in the substantially downward direction from the central portion of the waste valve member and engages the lower bearing in throughpassing slidable relation.
- According to yet another aspect of the invention, a peripheral cushioning member extends transversely from the longitudinal upper piston portion. The peripheral cushioning member selectively engages the upper bearing when the waste valve member is in the default waste configuration.
- According to a yet further aspect of the preferred embodiment of the invention, the substantially horizontal path comprises a substantially horizontal axis.
- According to another aspect of the preferred embodiment of the invention, the fluid source is substantially unobstructed by the check valve body when the check valve member is in the pump configuration.
- According to yet still another aspect of the preferred embodiment of the invention, the fluid source is flowable through the pump outlet into a pressure vessel when the check valve member is in the pump configuration. The pressure vessel defines a vessel outlet and contains a substantially impermeable bladder membrane that is remotely positioned relative to both the pump outlet and the vessel outlet respectively. The bladder membrane encloses a buffer fluid that is elastically pressurized when the check valve member is in the pump configuration.
- According to a further aspect of the preferred embodiment of the invention, the manifold casing, the check valve body, and the waste valve body are each respectively constructed from conventional valving mechanisms.
- Other advantages, features and characteristics of the present invention, as well as methods of operation and functions of the related elements of the structure, and the combination of parts and economies of manufacture, will become more apparent upon consideration of the following detailed description with reference to the accompanying illustrations, the latter of which is briefly described hereinbelow.
- In the accompanying Figures, which should be expressly understood to be for the purpose of illustration and description only, and are not intended as a definition of the limits of the invention:
- FIG. 1 is a side elevational view of an improved ram pump according to a preferred embodiment of the invention showing, in phantom outline, the bladder membrane inside the pressure vessel.
- FIG. 2 is a partially exploded view of the structure of FIG. 1;
- FIG. 3 is an enlarged view of the waste valve body of FIG. 2 showing, in phantom outline, the waste valve member in the waste configuration;
- FIG. 4 is a partially sectional view along sight line4-4 of FIG. 3 with the waste valve member in the closed configuration;
- FIG. 5 is an enlarged sectional view of the check valve member of FIG. 2 shown in the ram configuration;
- FIG. 6 is an enlarged sectional view of the check valve member of FIG. 2 shown in the pump configuration;
- FIG. 7 is a front, bottom perspective partial view of the waste valve member of FIG. 4;
- FIG. 8 is a front, bottom perspective view of an extender according to a preferred embodiment of the invention; and
- FIG. 9 is a view of the extender of FIG. 8, in use with the pump of FIG. 1.
- Referring now to FIG. 1, there is shown an improved
ram pump 20 for use with a fluid source (not shown) having an initial head. Theram pump 20 is of a type that has anintake manifold 22 engagable with the fluid source. Theintake manifold 22 defines awaste outlet 36 and a threadedpump outlet 24 therethrough. - The
ram pump 20 also includes awaste valve member 42 that is selectively moveable between a waste configuration whereat the fluid source is flowable through the waste outlet 36 (as best seen in FIG. 3) and a closed configuration whereat thewaste valve member 42 sealingly obstructs flow of the fluid source through the waste outlet 36 (as best seen in FIG. 4). - Further, the
ram pump 20 also includes acheck valve member 54 that is selectively moveable between a ram configuration whereat thecheck valve member 54 substantially obstructs flow of the fluid source through the pump outlet 24 (as best seen in FIG. 5) and a pump configuration whereat the fluid source is flowable through the pump outlet 24 (as best seen in FIG. 6). - As best seen in FIGS. 1, 2 and6, the fluid source is flowable through the
pump outlet 24 into apressure vessel 70 when thecheck valve member 54 is in the pump configuration. Thepressure vessel 70 includes avessel cap member 78 and ahollow vessel body 80 that defines a threadedvessel outlet 72. Thehollow vessel body 80 has a closedend 82 and anopen end 84 and is in fluid communication with thevessel outlet 72 which is intermediate the closedend 82 and theopen end 84. Thevessel cap member 78 sealingly and threadingly engages theopen end 84 of thevessel body 80, and in this regard, theopen end 84 of thehollow vessel body 80 is provided withthreads 86 to sealingly engage, in use,corresponding threads 88 provided on thevessel cap member 78. Thevessel cap member 78 has avessel inlet 79 formed therethrough, and is rigidly connected, by welding or the like, to themanifold casing 26. The vessel inlet 79 of thevessel cap member 78 and thepump outlet 24 of themanifold casing 26 are in fluid communication with one another. - The
pressure vessel 70 contains a substantiallyimpermeable bladder membrane 74 that is positioned within thevessel body 80 adjacent the closedend 82 and remotely positioned relative to both thepump outlet 24 and thevessel outlet 72 respectively. Thebladder membrane 74 encloses abuffer fluid 76 that is elastically pressurized when thecheck valve member 54 is in the pump configuration. Thebladder membrane 74, which is constructed from rubber or a similar elastic material, may be filled with air or any other elastically pressurizable fluid. - The
intake manifold 22 includes a tubularwaste valve body 28 and amanifold casing 26 that is engagable with the fluid source adjacent a threadedsupply inlet 27A thereof. Themanifold casing 26 is in fluid communication with thepump outlet 24 of theintake manifold 22 and has a threadedwaste body port 27B. Themanifold casing 26, as shown in the figures, may be formed from a conventional 2″ tee fitting, constructed out of 316-1 stainless steel and having a ¼″ wall thickness. - The threaded
waste body port 27B of themanifold casing 26 securely, sealingly and threadingly engages alower end portion 30 of thewaste valve body 28. Thewaste valve body 28 defines in throughpassing relation awaste conduit 32 extending between thelower end portion 30 and anupper end portion 34 of thewaste valve body 28. Thewaste conduit 32 is in fluid communication with themanifold casing 26 substantially adjacent to thelower end portion 30 and in fluid communication with thewaste outlet 36 substantially adjacent to theupper end portion 34 of thewaste valve body 28. Thewaste valve body 28 also defines aconstricted portion 33 of thewaste conduit 32 that is intermediate of thelower end portion 30 and thewaste outlet 36, and has a smaller cross-sectional area than some other portions of thewaste conduit 32. Theconstricted portion 33 has aseat portion 33A. - The waste valve body also includes an
upper bearing 38 rigidly mounted, by welding or the like, substantially adjacent to theupper end portion 34 and alower bearing 40 rigidly mounted, by welding or the like, substantially adjacent to thelower end portion 30. A longitudinalupper piston portion 50 of thewaste valve member 42 extends in a substantially upward direction “D” from acentral portion 48 of thewaste valve member 42. The longitudinalupper piston portion 50 extends through theconstricted portion 33 of thewaste conduit 32, through thewaste outlet 36, and engages theupper bearing 38 in throughpassing slidable relation. Theupper piston portion 50 has a threadedupper end portion 51. A longitudinallower piston portion 52 of thewaste valve member 42 extends in the substantially downward direction “C” from thecentral portion 48 of thewaste valve member 42. The longitudinallower piston portion 52 engages thelower bearing 40 in throughpassing slidable relation. The upper and lower piston portions, 50 and 52, move with thewaste valve member 42 between the waste and the closed configurations. - A
peripheral cushioning member 60 extends transversely from the longitudinalupper piston portion 50. Theperipheral cushioning member 60 includes a conventional nut or fasteningmember 62 threadingly engaging the threadedupper end portion 51 of theupper piston portion 50 of thewaste valve member 42. Theperipheral cushioning member 60 also includes acompressible pad member 64 positioned about theupper piston portion 50 and securely engaging thefastening member 62. A reinforcingring member 66 securely engages thecompressible pad member 64 in circumferential relation. - As best seen in FIGS. 3 and 4, the
waste valve member 42 is selectively moveable, in use, along a path having a vertical component, and preferably along a substantially vertical axis A-A, between the default waste configuration and the closed configuration, such that thewaste valve member 42 is gravity-biased towards thelower end portion 30 of thewaste valve body 28 and towards the default waste configuration. As best shown in FIG. 3, theperipheral cushioning member 60, and more specifically thecompressible pad member 64, selectively engages theupper bearing 38 when thewaste valve member 42 is in the default waste configuration. - As best seen in FIG. 7, a
tubular skirt portion 46 extends in a substantially downward direction “C” from aperipheral portion 44 of thewaste valve member 42. Thetubular skirt portion 46 has a circumference slightly smaller than the base of theperipheral portion 44, and slightly larger than the constrictedportion 33. As best shown in FIG. 4, theperipheral portion 44 securely engages a peripheral O-ring member 45 that sealingly engages theseat portion 33A when thewaste valve member 42 is in the closed configuration. - It will be appreciated by persons of ordinary skill in the art that the
waste valve body 28 and thewaste valve member 42, as best seen in FIGS. 3 and 4, may together be constructed from a 1 ½″ nominal OD threadedcoupling 100 and a conventional 1 ¼″ stainless steel gravity-biasedcheck valve 102, modified as follows: in the provision of theskirt portion 46; in the placement of thebearings member 60; and in the provision of theconstricted portion 33. - As best seen in FIGS. 5 and 6, the
check valve member 54 is selectively moveable, in use, along a substantially horizontal path, and preferably along a substantially horizontal axis B-B, between the ram configuration and the pump configuration. Thecheck valve member 54 is spring biased towards the ram configuration by aspring member 58C. Thecheck valve member 54 also includes acheck valve body 56 and avalve cap member 58. Thespring member 58C is mounted to thecheck valve body 56 and to thevalve cap member 58 to bias thevalve cap member 58 for movement towards the ram configuration. - The
check valve body 56 has adownstream end 57B, an internally threadedportion 57A, and a threadedcheck valve coupling 55 sealingly, threadingly engaged within the internally threadedportion 57A of thecheck valve body 56. Thecheck valve body 56 has acheck valve seat 59 formed therein, substantially adjacent to thedownstream end 57B. Thevalve cap member 58 has avalve cap 58A and astem 58B, and is mounted to thecheck valve body 56. In use, thevalve cap member 58 moves along the substantially horizontal axis B-B between the ram configuration whereat thevalve cap 58A rests on thecheck valve seat 59 to substantially obstruct flow of the fluid source through thepump outlet 24 and the downstream end 56B of thecheck valve body 56, as best seen in FIG. 5, and the pump configuration whereat thevalve cap 58A is disposed apart from thecheck valve seat 59 to permit substantially unobstructed fluid flow through thecheck valve member 54, as best seen in FIG. 6. - In use, the
check valve member 54 is disposed within thepressure vessel 70. The threadedcheck valve coupling 55 extends from the internally threadedportion 57A, through thevessel inlet 79 of thevessel cap member 78, to securely, sealingly and threadingly engage thepump outlet 24 of themanifold casing 26. It will be noted that thecheck valve member 54 of the preferred embodiment may be formed from a conventional 1 ¼ check valve, constructed of stainless steel, modified only by the removal of a tubular portion which, as purchased, extends slightly beyond thevalve cap 70 when seated, so as to shield the same when in the check valve member is in the pump configuration. With this modification, and as best seen in FIG. 6, the fluid source is substantially horizontally flowable through thepump outlet 24, and substantially unobstructed by thecheck valve body 56, when thecheck valve member 54 is in the pump configuration. - As such, it will be appreciated from the foregoing that the
manifold casing 26, thecheck valve body 54, and thewaste valve body 28 may each respectively be constructed from conventional valving mechanisms. - In use, the supply inlet27 of the
manifold casing 26 is coupled to the fluid source (not shown), so as to permit flowing water or some other fluid to enter themanifold casing 26 through the supply inlet 27. Thevalve cap member 58 of thecheck valve member 54, being biased as aforementioned towards the ram configuration, substantially obstructs the flow of fluid into thepressure vessel 70, causing fluid to instead flow into thewaste valve body 28, around thewaste valve member 42, which is initially positioned in the waste configuration as shown in FIG. 3, and out of thewaste outlet 36. Theram pump 20 is of a type that urges thewaste valve member 42 towards the closed configuration when thecheck valve member 54 is in the ram configuration and thewaste valve member 42 is in the waste configuration, and when the fluid source is at a first maximum head, namely, when the fluid source reaches a certain maximum speed through thewaste outlet 36 sufficient to overcome the gravity-biasing of thewaste valve member 42 towards the waste configuration. That is, the flowing force of said fluid source ultimately (i.e., at the first maximum head) drags thewaste valve member 42 to the closed configuration, as best seen in FIG. 4, to sealingly obstruct flow through thewaste outlet 36. - Thereafter, the momentum of the flowing water (a “water hammer”) from the fluid source causes a temporary increase in pressure within the
manifold casing 26 to reach a second maximum head that is sufficient to overcome the bias of thespring member 58C and permit a charge of water to enter thepressure vessel 70, and to elastically pressurize the air or other fluid contained within thebladder membrane 74. That is, thecheck valve member 54 is urged towards the pump configuration when thewaste valve member 42 is in the closed configuration and thecheck valve member 54 is in the ram configuration, and when the fluid source is at the second maximum head. - Next, at a first minimum head, once the pressure between the
manifold casing 26 and thepressure vessel 70 has substantially equalized, thewaste valve member 42 tends to move, under force of gravity, away from the closed configuration and towards the waste configuration, as best seen in FIG. 3, since any drag forces (at the first maximum head) which may have previously caused it to move towards the closed configuration have dissipated and no longer exist, such that flow can again occur through thewaste valve body 28. To put it another way, theram pump 20 urges thewaste valve member 42 towards the waste configuration when thecheck valve member 54 is in the pump configuration and thewaste valve member 42 is in the closed configuration, and when the fluid source is at the first minimum head. - To complete the cycle, the
check valve member 54 is urged towards the ram configuration when thewaste valve member 42 is in the waste configuration and thecheck valve member 54 is in the pump configuration, and when the fluid source is at a second minimum head. That is, flow of the fluid source through thewaste outlet 36 results in insufficient pressure within themanifold casing 26 to continue to resist the spring-biasing of thecheck valve member 54 towards the ram configuration, and therefore, thevalve cap 70 in thecheck valve member 54 naturally returns to the ram configuration, thereby substantially obstructing further flow between themanifold casing 26 and thepressure vessel 70. - Over time, and with repeated cycles of the
improved ram pump 20 as aforesaid, pressure in the air or other fluid contained within thebladder membrane 74, and pressure on any water or other fluid within thepressure vessel 70, will build until it is sufficient to expel such water or other fluid through thevessel outlet 72 against any stationary head that may exist, or until it matches the instantaneous pressure created by the water hammer. The pressure in thebuffer fluid 76 may also act as a steady exhausting force to remove fluid from thevessel body 80 at a substantially more uniform rate than any rate at which it may be supplied from themanifold casing 26 through thepump outlet 24. That is, an intermittent flow of fluid may be converted by thebladder membrane 74 and thebuffer fluid 76 into a more uniform and constant stream. - Depending, inter alia, upon the initial head of the water supplied to the supply inlet27, and the stationary head which needs to be overcome before water or other fluid can be expelled through the
vessel outlet 72, adjustments to a stroke length and/or to an effective weight of thewaste valve member 42, such as are known to persons of ordinary skill in the art, may need to be made to theram pump 20. Adjustments to the stroke length can be achieved simply by manipulation of thefastening member 62 of the cushioningmember 60, and sliding thepad member 64 and the reinforcingring member 66 accordingly. Adjustments to the effective weight of thewaste valve member 42 can be achieved by affixing a suitable weight to the threadedupper end portion 51 of theupper piston portion 50. Nuts, for example, could be used. However, in circumstances where the water or other fluid is delivered to the supply inlet 27 at a substantial initial head or pressure, substantial forces may need to be applied to theupper piston portion 50 in order to overcome same. In such case, relatively more massive objects need be used. For this purpose, anextender 90, as illustrated in FIG. 8, may be threaded onto the threadedupper end portion 51 of theupper piston portion 50 in the manner illustrated in FIG. 9, to permit larger weights to be employed. - Without intending to be bound by theory, the relatively high efficiency of the present invention is obtained inter alia through the modification of the
check valve member 54, as aforesaid, which is believed to improve flow characteristics between themanifold casing 26 and thepressure vessel 70; through the substantially horizontal orientation of thecheck valve member 54 along axis B-B; and through the provision of theskirt portion 46 and theconstricted portion 33, which are believed to provide an advantageous swirling flow (not shown) in thewaste valve body 28. Similarly, without intending to be bound by theory, the relatively high reliability of the present invention is obtained inter alia through the positioning of the upper andlower bearings cushion member 60, which lessens the shock that would otherwise be placed on thewaste valve member 42. The use of conventional valving mechanisms, in part, is responsible for the relatively low cost of the structure. - Of course, various modifications may be made to the present invention without departing from its spirit or scope. Accordingly, the present invention should be understood as being limited only by the accompanying claims, purposively construed. An example of one such modification is the replacement of the
vessel cap member 78 with a cap plate (not shown) that may be rigidly connected, by welding or the like, directly to the threadedcheck valve coupling 55. In such a modification, the cap plate and thevessel body 80 might also be adapted to securely and sealingly engage one another by way of a clamp member (not shown). Likewise, it will be appreciated that thevessel outlet 72, although shown in the accompanying figures to have a substantially vertical axis, may be oriented along an axis that does not even have a vertical component (i.e., that is horizontal). As well, and as best seen in FIG. 4, the threadedcoupling 100 may be provided with or without a constricted upper portion; such a constricted upper portion would serve to accelerate passage of the fluid source through thecoupling 100. Another modification that is specifically contemplated by the invention, and one that may be of particular application inter alia where there is a low existing stationary head, is that of aram pump 20 provided without apressure vessel 70, that instead feeds fluid directly from thepump outlet 24 to an end user. In light of the various exemplary modifications and alterations outlined above which do not depart from the spirit or scope of the invention, it should once again be noted that the present invention is limited only by the accompanying claims.
Claims (16)
1. An improved ram pump for use with a fluid source having an initial head, said ram pump being of the generally known type having:
a) an intake manifold engagable with said fluid source, said intake manifold defining a waste outlet and a pump outlet therethrough;
b) a waste valve member selectively moveable between a waste configuration whereat said fluid source is flowable through said waste outlet and a closed configuration whereat said waste valve member sealingly obstructs flow of said fluid source through said waste outlet; and
c) a check valve member selectively moveable between a ram configuration whereat said check valve member substantially obstructs flow of said fluid source through said pump outlet and a pump configuration whereat said fluid source is flowable through said pump outlet;
wherein said ram pump is generally known to urge:
d) said waste valve member towards said closed configuration when said check valve member is in said ram configuration and said waste valve member is in said waste configuration, and when said fluid source is at a first maximum head;
e) said check valve member towards said pump configuration when said waste valve member is in said closed configuration and said check valve member is in said ram configuration, and when said fluid source is at a second maximum head;
f) said waste valve member towards said waste configuration when said check valve member is in said pump configuration and said waste valve member is in said closed configuration, and when said fluid source is at a first minimum head; and
g) said check valve member towards said ram configuration when said waste valve member is in said waste configuration and said check valve member is in said pump configuration, and when said fluid source is at a second minimum head;
wherein the improvement comprises:
h) said waste valve member being selectively moveable along a path having a vertical component between said default waste configuration and said closed configuration, with said waste valve member being gravity-biased towards said default waste configuration; and
i) said check valve member being selectively moveable along a substantially horizontal path between said ram configuration and said pump configuration, with said check valve member being biased towards said ram configuration, wherein said fluid source is substantially horizontally flowable through said pump outlet when said check valve member is in said pump configuration.
2. An improved ram pump according to claim 1 , wherein a tubular skirt portion extends in a substantially downward direction from a peripheral portion of said waste valve member.
3. An improved ram pump according to claim 2 , wherein said path having a vertical component comprises a substantially vertical axis.
4. An improved ram pump according to claim 3 , wherein said intake manifold includes a waste valve body and a manifold casing engagable with said fluid source, with said manifold casing securely engaging a lower end portion of said waste valve body, said waste valve body defining in throughpassing relation a waste conduit extending between said lower end portion and an upper end portion of said waste valve body, said waste conduit being in fluid communication with said manifold casing substantially adjacent to said lower end portion and in fluid communication with said waste outlet substantially adjacent to said upper end portion of said waste valve body, and wherein said waste valve body includes an upper bearing mounted substantially adjacent to said upper end portion and a lower bearing mounted substantially adjacent to said lower end portion, with a longitudinal upper piston portion of said waste valve member extending in a substantially upward direction from a central portion of said waste valve member and engaging said upper bearing in throughpassing slidable relation, and with a longitudinal lower piston portion of said waste valve member extending in said substantially downward direction from said central portion of said waste valve member and engaging said lower bearing in throughpassing slidable relation.
5. An improved ram pump according to claim 4 , wherein a peripheral cushioning member extends transversely from said longitudinal upper piston portion, with said peripheral cushioning member selectively engaging said upper bearing when said waste valve member is in said default waste configuration.
6. An improved ram pump according to claim 5 , wherein said waste valve body defines a constricted portion of said waste conduit that is intermediate of said lower end portion and said waste outlet, said constricted portion having a seat portion, and wherein said peripheral portion securely engages a peripheral O-ring member that sealingly engages said seat portion when said waste valve member is in said closed configuration.
7. An improved ram pump according to claim 6 , wherein said substantially horizontal path comprises a substantially horizontal axis.
8. An improved ram pump according to claim 7 , wherein said check valve member is spring biased towards said ram configuration.
9. An improved ram pump according to claim 8 , wherein said check valve member comprises a check valve body and a valve cap member, said check valve body securely engaging said intake manifold substantially adjacent to said pump outlet, and wherein said valve cap member substantially obstructs flow of said fluid source through said pump outlet when said check valve member is in said ram configuration.
10. An improved ram pump according to claim 9 , wherein said fluid source is substantially unobstructed by said check valve body when said check valve member is in said pump configuration.
11. An improved ram pump according to claim 10 , wherein said lower end portion of said waste valve body sealingly and threadingly engages said manifold casing.
12. An improved ram pump according to claim 11 , wherein said check valve body sealingly and threadingly engages said intake manifold substantially adjacent to said pump outlet.
13. An improved ram pump according to claim 12 , wherein said upper piston portion has a threaded upper end portion, and wherein said peripheral cushioning member comprises a fastening member threadingly engaging said threaded upper end portion, a compressible pad member positioned about said upper piston portion and securely engaging said fastening member, and a reinforcing ring member securely engaging said compressible pad member, with said compressible pad member selectively engaging said upper bearing when said waste valve member is in said default waste configuration.
14. An improved ram pump according to claim 13 , wherein said fluid source is flowable through said pump outlet into a pressure vessel when said check valve member is in said pump configuration, said pressure vessel defining a vessel outlet and containing a substantially impermeable bladder membrane that is remotely positioned relative to both said pump outlet and said vessel outlet respectively, with said bladder membrane enclosing a buffer fluid that is elastically pressurized when said check valve member is in said pump configuration.
15. An improved ram pump according to claim 14 , wherein said pressure vessel comprises a hollow vessel body and a vessel cap member, said hollow vessel body having a closed end and an open end and being in fluid communication with said vessel outlet, with said bladder membrane positioned within the vessel body adjacent said closed end, and with said vessel cap member sealingly and threadingly engaging said open end of said vessel body, and wherein said vessel cap member securely engages said intake manifold substantially adjacent to said pump outlet.
16. An improved ram pump according to claim 15 , wherein said manifold casing, said check valve body, and said waste valve body are each respectively constructed from conventional valving mechanisms.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/650,699 US20040042907A1 (en) | 2002-08-30 | 2003-08-29 | Ram pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US40701302P | 2002-08-30 | 2002-08-30 | |
US10/650,699 US20040042907A1 (en) | 2002-08-30 | 2003-08-29 | Ram pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20040042907A1 true US20040042907A1 (en) | 2004-03-04 |
Family
ID=32069666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/650,699 Abandoned US20040042907A1 (en) | 2002-08-30 | 2003-08-29 | Ram pump |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040042907A1 (en) |
CA (1) | CA2439052A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140060620A1 (en) * | 2012-08-31 | 2014-03-06 | Tennessee Valley Authority | Solar photovoltaic panel cooling system and method |
WO2022129948A1 (en) | 2020-12-18 | 2022-06-23 | HydroHammer Limited | Electronic ram pump controller |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4296A (en) * | 1845-12-06 | Water-ram | ||
US123098A (en) * | 1872-01-30 | Improvement in steam or air brakes | ||
US1148982A (en) * | 1911-12-14 | 1915-08-03 | William Nicholas | Hydraulic ram. |
US4911613A (en) * | 1988-10-24 | 1990-03-27 | Larry A. Cox | Hydraulic ram-type water pump |
US5514110A (en) * | 1993-03-22 | 1996-05-07 | Teh; Eutiquio L. | Automatic flow control device |
-
2003
- 2003-08-29 US US10/650,699 patent/US20040042907A1/en not_active Abandoned
- 2003-08-29 CA CA002439052A patent/CA2439052A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4296A (en) * | 1845-12-06 | Water-ram | ||
US123098A (en) * | 1872-01-30 | Improvement in steam or air brakes | ||
US1148982A (en) * | 1911-12-14 | 1915-08-03 | William Nicholas | Hydraulic ram. |
US4911613A (en) * | 1988-10-24 | 1990-03-27 | Larry A. Cox | Hydraulic ram-type water pump |
US5514110A (en) * | 1993-03-22 | 1996-05-07 | Teh; Eutiquio L. | Automatic flow control device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140060620A1 (en) * | 2012-08-31 | 2014-03-06 | Tennessee Valley Authority | Solar photovoltaic panel cooling system and method |
WO2022129948A1 (en) | 2020-12-18 | 2022-06-23 | HydroHammer Limited | Electronic ram pump controller |
Also Published As
Publication number | Publication date |
---|---|
CA2439052A1 (en) | 2004-02-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: W&B RAM PUMPS INC, CANADA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WHITEHOUSE, RONALD F;REEL/FRAME:014447/0903 Effective date: 20030827 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |