LOW PROFILE PUMP WITH THE ABILITY TO BE MOUNTED IN VARIOUS CONFIGURATIONS

Abstract

A pumping system featuring a pump chamber configured with a central portion having a tangential outlet, and configured with a tubular coupling end portion having inwardly flexible rim portions on one side; and a mounting base, having a circular portion with an inner circumferential rim configured to receive and engage the inwardly flexible rim portions of the tubular coupling portion of the pump chamber so as to be rotationally coupled to the pumping chamber so that the pumping chamber may be rotated 360° in relation to the mounting base.

Claims

1-9. (canceled)

10. A pumping system comprising: a mounting base having a circular portion with a circumferential wall configured with at least two slots formed therein; a motor, pump and electronics assembly having a housing with a motor arranged therein, the housing being configured with at least two detents formed thereon; and a switching assembly having a water level sensor configured to respond to a water level and turn the motor on and off, the switching assembly being arranged in the housing of the motor, pump and electronics assembly; the mounting base and the motor, pump and electronics assembly being coupled together using a detent and slot arrangement so that the at least two slots receive the at least two detents for rotationally coupling together the mounting base and the motor, pump and electronics assembly in at least two rotational orientations that differ by 180°, including a first rotational orientation so that the water level sensor is located at a higher height in the housing for providing a higher water level sensing setting, and a second rotational orientation so that the water level sensor is located at a lower height in the housing part for providing a lower water level sensing setting.

11. A pumping system according to claim 10, wherein the at least two slots include two inwardly extending and diametrically opposed slots arranged at 0°, 180°; or 90°, 270°; and at least two detents include two outwardly extending and diametrically opposed detents arranged correspondingly at 0°, 180°; or 90°, 270°.

12. A pumping system according to claim 10, wherein the at least two slots include four inwardly extending slots arranged at 0°, 90°, 180° and 270°; at least two detents include four outwardly extending detents arranged correspondingly at 0°, 90°, 180° and 270°; and. the mounting base and the motor, pump and electronics assembly being coupled together using the detent and slot arrangement so that the four inwardly extending slots receive the four outwardly extending detents for rotationally coupling together the mounting base and the motor, pump and electronics assembly in at least four rotational orientations that differ by 90°.

13. A pumping system according to claim 1, wherein the circumferential wall is, or takes the form of, an inner circumferential wall.

14. A pumping system according to claim 1, wherein the circumferential wall is configured with at least two slotted opening formed therein for receiving the at least two detents for coupling together the mounting base and motor, pump and electronics assembly.

15. A pumping system according to claim 10, wherein the mounting base comprises one or more lower mounting legs with apertures formed therein and configured to be mounted to a surface or workpiece, including via a fastener.

16. A pumping system according to claim 10, wherein the switching assembly comprises a printed circuit board assembly having the water level sensor configured therein, so that in the a first rotational orientation the water level sensor is located at the higher height in the housing for providing the higher water level sensing setting, and in the second rotational orientation the water level sensor is located at the lower height in the housing part for providing the lower water level sensing setting.

17. A pumping system according to claim 10, wherein the pumping system is, or forms part of, a bilge pump.

18. A pumping system according to claim 10, wherein the housing is a two part housing, having a first housing part configured with the at least two detents formed thereon, and having a second housing part configured to receive and contain the motor.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0021] The drawing includes the following Figures, which are not necessarily drawn to scale:

[0022] FIG. 1 shows a top down perspective view of an assembled low profile pump, according to some embodiments of the present invention.

[0023] FIG. 2 shows a bottom up perspective view of the assembled low profile pump shown in FIG. 1, according to some embodiments of the present invention.

[0024] FIG. 3 is an exploded side view of a low profile pump, according to some embodiments of the present invention.

[0025] FIG. 4 is a further exploded side view of the low profile pump in FIG. 3, according to some embodiments of the present invention.

[0026] FIG. 5 is a perspective view of a mounting base that forms part of the low profile pump, according to some embodiments of the present invention.

[0027] FIG. 6 is an exploded top perspective side view of a low profile pump having a motor housing without a switch included, according to some embodiments of the present invention.

[0028] FIG. 7 is an assembled perspective view of a low profile pump shown having a motor housing with a switch included, according to some embodiments of the present invention.

[0029] FIG. 8 includes FIGS. 8a and 8b, where FIG. 8a shows the low profile pump having a motor/pump/electronics assembly configured so that a water level sensor on a Printed Circuit Board Assembly (PCBA) is located for a higher water level sensing setting, according to some embodiments of the present invention; and where FIG. 8b shows the low profile pump having the motor/pump/electronics assembly configured so that the water level sensor on the PCBA is located for a lower water level sensing setting, according to some embodiments of the present invention.

[0030] FIGS. 1-8 are described herein using accompanying reference numerals and lead lines. To reduce clutter in the drawing, similar elements in different Figures are not all labeled with reference labels. Moreover, the embodiments shown in FIGS. 1-5 and FIGS. 6-7 contain many similar elements. In view of this, elements in FIGS. 6-7 that correspond to similar elements shown in FIGS. 1-5 are labeled with similar reference numerals with the addition of 100.

DETAILED DESCRIPTION OF THE INVENTION

[0031] FIGS. 1-5 show a low profile pumping system according to some embodiments of the present invention generally indicated as 10, having four basic parts or components, including a pickup nozzle/scoop generally indicated as 20, a pumping chamber generally indicated as 30, a mounting base generally indicated as 40, a motor/pump/electronics assembly generally indicated as 50 and a switch assembly, circuit or arrangement generally indicated as 60. The low profile pump 10 may take the form of a bilge pump for mounting in the bilge of a boat or vessel for pumping water from the bilge out of the boat or vessel. In FIGS. 1-2, the pump 10 is shown with an optional adapter 12 in dashed lines that may be configured on a discharge port or outlet 34 of the pumping chamber 30 depending on the particular application. For example, the adapter 12 may be configured with suitable hosing (not shown) for use as a conduit for providing the fluid being pumped, e.g., out of the boat or vessel. The mounting base 40 (e.g., see also FIG. 5) may be configured so the pump 10 is mounted or affixed to some surface, e.g., in the bilge of the boat or vessel.

[0032] According to some embodiments of the present invention, the pumping system 10 may include a new and unique combination of a pump chamber 30 and a mounting base 40. The pump chamber 30 may be configured with a central portion 32 having the outlet 34, and also configured with a tubular coupling end portion 36 having inwardly flexible portions 38, each with a respective outwardly extending raised rim 38a; and the mounting base 40 may include a circular portion 42 having one or more inner circumferential rims or walls 42a′, 42a″ with an inner circumferential recess 42c′″ formed therein and configured to receive and engage the outwardly extension raised rims 38a of the inwardly flexible rim portions 38 of the tubular coupling portion 36 of the pump chamber 30, e.g., when the tubular coupling end portion 36 of the pump chamber 30 is pushed into the circular portion 42 of the mounting base 40, so that the pumping chamber 30 is rotationally coupled to the mounting base 40 for 360° rotation.

[0033] The pumping system shown in FIGS. 6-7 includes a similar new and unique combination of a pump chamber 130 and a mounting base 140.

[0034] The embodiments shown in FIGS. 1-5 and 6-7 are now described in further detail.

FIGS. 1-5

[0035] In FIGS. 3-4, the pickup nozzle or scoop 20 forms a first part of the overall pumping system 10 and may include a nozzle or scoop portion 22 and a sliding strainer 24 that can be easily removed for cleaning. In addition to the removable strainer screen 24, the entire pick-up nozzle or scoop portion 22 and its supporting structure can be fully rotated through 360 degrees. The pickup nozzle or scoop 20 also includes an outlet portion 26 that may be coupled to the pumping chamber 30 so that when the pumping chamber 30 is rotated 360° in relation to the mounting base 40, the pickup nozzle or scoop 20 may similarly rotate 360° in relation to the mounting base 40. Alternatively, embodiments are envisioned in which the outlet portion 26 is coupled to the pumping chamber 30 so that when the pumping chamber 30 is rotated 360° in relation to the mounting base 40, the pickup nozzle or scoop 20 does not rotate in relation to the mounting base 40.

[0036] The pumping chamber 30 forms a second part of the overall pumping system 10 and includes the central portion 32 having the outlet 34 as shown, a tubular coupling and axial inlet end portion 33 on its left side as shown to rotationally couple to the outlet portion 26 of the pickup nozzle or scoop 20, and also the tubular coupling end portion 36 having the inwardly flexible portions 38 with the raised rims 38a on its right side as shown. In FIGS. 3-4, the tubular coupling end portion 36 is shown having eight inwardly flexible portions 38, each with a respective raised rims 38a on its right side as shown. (FIGS. 3-4 show one side of the pumping system 10, and four of the eight inwardly flexible portions 38.) However, embodiments are envisioned, and the scope of the invention is intended to include, using fewer than eight inwardly flexible portions 38, or using more than eight inwardly flexible portions 38, within the scope and spirit on the present invention. In effect, the scope of the invention is not intended to be limited to the number of inwardly flexible portions 38 or raised rims 38a. The tubular coupling and axial inlet end portion 33 may form part of a volute portion 39 configured to form part of the pumping chamber 30. By way of example, the tubular coupling and axial inlet end portion 33 of the pumping chamber 30 may be rotationally coupled to the outlet portion 26 of the pickup nozzle or scoop 20 using one or more O-rings (not shown). In addition, the tubular coupling and axial inlet end portion 33 of the pumping chamber 30 may include a raised portion, e.g. similar to the raised rim of the inwardly flexible portions 38, for engaging a corresponding rim or recess portion associated with, or configured in, the outlet portion 26 of the pickup nozzle or scoop 20, e.g., similar to the inner circumferential recess 42c′″ of the mounting base 40.

[0037] The mounting base 40 forms a third part of the overall pumping system 10 that is best shown in FIG. 5. The inner circumferential rim or wall 42a′ may be configured with at least two recessed coupling portions 42b formed or configured therein, as shown, each for receiving a respective outwardly extending, detent, tab or protrusion 54a of a motor housing 54. By way of example, the at least two recessed coupling portions 42b include four recessed coupling portions 42b arranged at 0°, 90°, 180° and 270°, consistent with that shown in FIG. 5. Each recessed coupling portion 42b may include a first recessed portion 42b′, a second recessed portion 42b″, and a third recessed portion 42b′″, consistent with that shown in FIG. 5. In operation, the respective outwardly extending tab or protrusion 54a may be received by the first recessed portion 42b′, rotated clockwise into a position so as to be received by the second recessed portion 42b″, pushed axially into the second recessed portion 42b″ so as to be received by the third recessed portion 42b′″, and rotated clockwise and then pushed axially back into the third recessed portion 42b′″ so as to couple the motor housing 54 to the mounting base 40.

[0038] The present invention is shown having four recessed coupling portions 42b for cooperating with four corresponding outwardly extending, detents, tabs or protrusions 54a; however, embodiments are envisioned, and the scope of the invention is intended to include, using fewer than four recessed coupling portions 42b for cooperating with fewer than four corresponding outwardly extending tab or protrusions 54a, as well as using more than four recessed coupling portions 42b for cooperating with more than four corresponding outwardly extending detents, tabs or protrusions 54a, within the spirit and scope of the present invention. Moreover, the present invention is shown having three recessed portions 42b′, 42b″ and 42b′″, however, embodiments are envisioned, and the scope of the invention is intended to include, using fewer than three recessed portions 42b′, 42b″ and 42b′″ for cooperating with the corresponding outwardly extending detents, tabs or protrusions 54a, as well as using more than three recessed portions 42b′, 42b″ and 42b′″ for cooperating with the corresponding outwardly extending, detents, tabs or protrusions 54a, within the spirit and scope of the present invention.

[0039] The inner circumferential rim or wall 42a″ may be configured with one or more wall portions 42c′, 42c″ formed or configured therein, as shown, each for receiving the outwardly extension raised rims 38a of the inwardly flexible rim portions 38 of the tubular coupling portion 36 of the pump chamber 30. For example, the wall portion 42c′ may be configured as an inwardly sloping surface so as to flex or push the inwardly flexible rim portions 38 as they are pushed axially into the central portion 42 of the mounting base 40. The wall portion 42c″ may be configured as a non-sloping surface so as to allow the inwardly flexible rim portions 38 to move towards the inner circumferential recess 42c′″. In operation, when the outwardly extending raised rims 38a are pushed far enough into the central portion 42 and reach the inner circumferential recess 42c′″, then the inwardly flexible rim portions 38 flex back outwardly into the inner circumferential recess 42c′″, and the outwardly extending raised rims 38a engage the inner circumferential recess 42c′″, so that the pump chamber 30 is rotationally coupled to and free to be rotated 360° in relation to the mounting base 40. Embodiments are envisioned, and the scope of the invention is intended to including, using one wall portions 42c′ or 42c″. For example, only the wall portion 42c′ may be used and configured as the inwardly sloping surface so as to flex or push the inwardly flexible rim portions 38 as they are pushed axially into the central portion 42 of the mounting base 40, and when the outwardly extension raised rims 38a are pushed far enough into the central portion 42 and reach the inner circumferential recess 42c′″, then the inwardly flexible rim portions 38 flex back outwardly, and the outwardly extending raised rims 38a engage the inner circumferential recess 42c′″. Alternatively, only the wall portion 42c″ may be used, configured and dimensioned as a non-sloping surface so as to flex or push the inwardly flexible rim portions 38 as they are pushed axially into the central portion 42 of the mounting base 40, and when the outwardly extending raised rims 38a are pushed far enough into the central portion 42 and reach the inner circumferential recess 42c′″, then the inwardly flexible rim portions 38 flex back outwardly into the inner circumferential recess 42c′″, and the outwardly extending raised rims 38a engage the inner circumferential recess 42c′″. (In effect, in this embodiment, the diameter of the wall portion 42c″ of the central portion 42 would be slightly less than the corresponding diameter of the tubular coupling portion 36 having the inwardly flexible rim portions 38.)

[0040] In addition, FIG. 5 also shows the mounting base 40 having mounting legs 44 and associated apertures 44a that are arranged in a coplanar configuration for attaching or fastening the mounting base 40 on a corresponding flat planar surface (not shown). By way of example, the mounting base 40 may be configured with two mounting members or legs 44, each having an aperture 44a formed or configured therein for mounting the mounting base 40 to a surface (not shown), e.g., via a fastener (not shown). Each mounting member or leg 44 may also have a slot 44b formed or configured therein for receiving the fastener (not shown), e.g., so as to allow the mounting base 40 to be slidably decoupled from the fastener without having to remove the fastener from the surface. Alternatively, embodiments are envisioned in which the two mounting members or legs 44 are only configured with apertures 44a, but no slots 44b, e.g., so the mounting base 40 cannot get free if the fasteners loosen over time.

[0041] Consistent with that shown in FIGS. 3-4. the motor, pump and electronics assembly 50 forms the fourth part of the overall pumping system 10 and may be configured to be mounted in the mounting base 40, e.g., via the aforementioned detent and slot arrangement, so that its impeller 52 extends into the pumping chamber 30. The detent and slot arrangement includes a cooperation between the recessed coupling portions 42b and the outwardly extending detents, tabs or protrusions 54a, e.g., consistent with that set forth above, so that the motor housing 54 of the motor, pump and electronics assembly 50 can couple to the mounting base 40 and the impeller 52 can extend into the pumping chamber 30. In addition, the motor, pump and electronics assembly 50 may include, or take the form of, a two-part housing 54, 56, where the one housing part 54 has the outwardly extending tab or protrusions 54a formed or configured thereon. The two-part housing 54, 56 is configured to receive and contain a motor 58 having a motor shaft 58a for coupling to the impeller 52, as well as suitable electronics 56 for operating the motor 58.

[0042] The motor, pump and electronics assembly 50 also include an assembly 39 for coupling the motor 58 to the housing 54.

[0043] By way of example, the outwardly extending detents, tabs or protrusions 54a may include four outwardly extending detents, tabs or protrusions 54a arranged at 0°, 90°, 180° and 270° for cooperating with the four recessed coupling portions 42b also arranged at 0°, 90°, 180° and 270°, so as to be able to orient the motor, pump and electronics assembly 50 in relation to the mounting base 40 in four rotational orientations. This flexibility allows the user to change the water level sensor setting, consistent with that set forth in relation to FIG. 8 below.

[0044] The pump 10 may also be configured with the switch assembly 60 for turning the motor on/off, as well as one or more other mechanisms 70, e.g., including a level sensor configured to turn the switch on/off depending on some sensed condition. The switch assembly 60 includes a PCBA 62 for controlling the operation of the pump, having a water level sensor circuit 62 configured to sense the high/low water level and turn the pump on/off, consistent with that described in further detail below in relation to FIG. 8. The switch assembly 60 and/or the one or more other mechanisms 70 may be configured with switching functionality consistent with that set forth below.

FIG. 6-7

[0045] According to some embodiments, the present invention may take the form of a pumping system generally indicated as 100 as shown in FIGS. 6-7. The pumping system 100 includes a similar four-part construction, having a pick-up or nozzle or scoop generally indicated as 120, a pumping chamber generally indicated as 130, a mounting base generally indicated as 140 and a motor/pump/electronic assembly 150, which are similar in their overall functionality to elements 20, 30, 40 and 50 shown in FIGS. 1-5.

[0046] By way of example, the pick-up nozzle or scoop 120 may include a nozzle or scoop portion 122 and a removable sliding strainer 124 that can be easily removed from the nozzle or scoop portion 122 for cleaning. In addition to the removable strainer screen 124, the pick-up nozzle or scoop 120 and its associated supporting structure as shown may be configured to be rotated through 360 degrees, consistent with that set forth in relation to the pickup nozzle/scoop 20. The pick-up or nozzle or scoop 120 may also be configured to contain an anti-airlock device or aperture formed therein that prevents trapped air from affecting the pumping operation. For example, to overcome an air lock condition, the pumping system 100 may be configured to release entrapped air, the air may be allowed to “bleed” out to the atmosphere allowing the water to rise and engage the impeller. By way of example, see a related patent application Ser. No. 14/193,210 (911-17.30-1//M-RLE-X0006), filed on 28 Feb. 2014; see another related patent application Ser. No. 14/193,269 (911-17.31-1//M-RLE-X0007), also filed on 28 Feb. 2014; and see still another patent application Ser. No. 13/917,970, (911-17.28-2//M-RLE-X0005), filed 14 Jun. 2013. All three of the aforementioned patent applications discloses a technique for solving the aforementioned air lock problem, are assigned to the assignee of the present application, and are incorporated by reference in their entirety.

[0047] The pumping chamber 130 may include a tangential discharge portion, similar to element 34 shown in FIGS. 1-4 and is configured to receive a volute portion 139. By way of example, the pumping system 100 may be configured using a possible centrifugal design that is built with the ability to have various pieces designed so that flexibility and scalability can be achieved by the selection of a specific volute configuration chosen prior to assembly. This feature greatly improves the ability to provide a pump with specific flow characteristics utilizing a larger number of common components to develop a pump family.

[0048] The pumping system 100 may include additional adapters like element 112 that allows the output configuration to be angled through multiple axes. The possibility of using multiple adapters also allows various final output connections to be made that may include any number of rigid, flexible or semi-flexible devices.

[0049] The discharge or pumping chamber 130 may include an O-ring or other flexible component 137 sealed allowing the unrestricted movement of that joint or a more restricted type movement with the selection of various sealing mechanisms.

[0050] The mounting portion or base 140 may be configured using a bracket type device that may be oriented in many positions depending upon the vertical or horizontal plane that the pumping system 100 may be attached. Usual mounting hardware of various types may be used to attach the pump including but not limited to rivets, various industrial cements, screws, bolts and other fixing devices. As shown, the mounting bracket 140 may be configured to incorporate a corresponding detent and slot arrangement or mechanism to orient the pump motor body, e.g., either without a switch (see FIG. 6) or with a switch assembly, circuit or arrangement 160 (see FIG. 7).

[0051] The switch arrangement 160 may be configured into several possible fixed positions that allow the switching mechanism, if included on the pump motor body, to be oriented as to take advantage of fixed or variable sensor placement, like element 170, allowing for multiple level sensing capabilities that can be manipulated by the user through methods that may include orientation of the motor pump assembly or possible manipulation of the sensor. This flexibility in implementation allows for a variety of level sensing options.

[0052] By way of example, the motor, pump and electronics assembly 150 may include an electrical motor, like element 58, or motor powered by another source of power. The motor pump body may come in various configurations two of which would include the switch arrangement 160 and without the switch arrangement 160 included. The switch arrangement 160 may include the additional mechanisms 170 that may affect the operation of the switch and causing certain functions of the switch to become disabled and replaced by other functions an example of that being a level sense operation of the switch and the possible ability to switch modes by the aforementioned methods to cause a different type of operation such as an automatic turn on timer function that incorporates other power sensing to determine when the pump would continue to operate and when to go back into the cycle of automatic operation repeating the cycle by use of an internal timer or some external trigger. The switch arrangement 160 may include the ability to receive an external trigger that would operate the pump regardless of its primary sense whether that is a timer in the automatic mode or a level sense type feature. Additional tabs 160a or exposed areas may include the description of the function that the pump is operating under which may include high or low or automatic or some other description, picture, symbol or phrase that explains in a visual or tactile manner the intended operation at that time. As certain mechanisms are moved, rotated or manipulated in other orientations, the messaging as described above may change or be exposed to explain the current intended operation.

Other Features, Including Switching and Level Sensing Options

[0053] In addition to that set forth above, the pump according to the present invention may include the following:

[0054] Another ability of this pumping system 100 is the multiple switching options available. In one embodiment, the pump can come as a manual pump utilizing a number of manual or electric or electronic switch arrangements to turn on and off.

[0055] In another embodiment, the pump can come with an included switching arrangement that is electric or electronic in nature that has the ability to turn the pump on and off detecting multiple levels of liquid. The multiple level sense ability can be chosen by the operator and is achieved by orientation of the housing that incorporates the switching mechanism. If the need for a different level sense is needed at a later time manipulation of the housing can change the level pick up sense.

[0056] The switching mechanism may also include a built-in feature that allows the pump to have an additional mode of operation which is a time dependent turn on and utilizing power detection technology, a determination of the whether the pump should stay on or turn off is achieved. This can continue the timing cycle which involves a set time elapse before a momentary turn on of the pump and the power usage technology determines whether there is sufficient drag on certain components which may include an impeller or other moving device that allows for pumping of liquids. This cycle can continue indefinitely or until the device that is causing the interference or saturation of the switch is moved so that the switch sensor no longer detects that and automatically switches into the level sense mode. In lieu of a so-called saturation switch, embodiments are also envisioned in which suitable switching functionality may be implemented using a combination of a reed switch and magnet, according to some embodiments of the present invention.

[0057] Because of the multiple level sense levels that can be achieved, the pumping system according to the present invention is more versatile fitting into various applications that were previously addressed by utilizing different pumps that fit a much more narrow application. Because of the ability to switch between the level sense and the automatic mode, the pumping system according to the present invention may achieve a far broader application schedule and capabilities.

FIG. 8

[0058] FIG. 8a shows the low profile pump having the motor/pump/electronics assembly 50 coupled to the mounting base 40 in a first orientation so that a water level sensor 62a on a PCBA 62 is located for a higher water level sensing setting. By way of example the higher water level sensing setting may be at about 2.5″ above the surface to which the mounting base 40 may be coupled, although the scope of the invention is not intended to be limited to any particular height or dimension.

[0059] In comparison, FIG. 8b shows the low profile pump having the motor/pump/electronics assembly 50 coupled to the mounting base 40 in a second orientation so that the water level sensor 62a on the PCBA 60 is located for a lower water level sensing setting than that shown in FIG. 8a. By way of example the lower water level sensing setting may be at about 1.5″ above the surface to which the mounting base 40 may be coupled, although the scope of the invention is not intended to be limited to any particular height or dimension.

[0060] In operation, the low profile pump 10 affords the user the ability to change the water level sensor setting by removing the motor/pump/electronics assembly 50 from the mounting base 40 consistent with that shown in FIG. 8a, rotating it 180° consistent with that shown in the transition from FIGS. 8a to 8b, and re-coupling the motor/pump/electronics assembly 50 back onto the mounting base 40 consistent with that shown in FIG. 8b, so that the water level sensor 62a on the PCBA 60 is located for a different water level sensing setting.

[0061] In FIGS. 8a and 8b, for the purpose of describing and visualizing the present invention, the water level sensor 62a and the PCBA 62 is being shown in relation to the switch assembly 60, although the water level sensor 62a and the PCBA 62 is understood to be arranged inside the switch assembly.

[0062] Moreover, it is also understood that the higher water level sensing setting will determine the high/low settings for turning on/off the low profile switch, and that the lower water level sensing setting will also determine the high/low settings for turning on/off the low profile switch, which will be different than the high/low settings determined for the higher water level sensing setting. Based on the examples of height provided above, the difference will be about 1″ based on the higher water level sensing setting of about 2.5″ and the lower water level sensing setting of about 1.5″.

LIST OF SOME POSSIBLE APPLICATIONS

[0063] The present invention has many possible applications, e.g., that may include the following:

[0064] Condensate pumping,

[0065] Air conditioner water movement,

[0066] Dehumidifier water movement,

[0067] Humidifier water movement,

[0068] Industrial water movement,

[0069] Low area water removal,

[0070] Tight quarters water removal,

[0071] Bilge pumping,

[0072] Closed compartment water removal,

[0073] Small boat casual water removal, and

[0074] Certain sump type pump operations.

The Scope of the Invention

[0075] It should be understood that, unless stated otherwise herein, any of the features, characteristics, alternatives or modifications described regarding a particular embodiment herein may also be applied, used, or incorporated with any other embodiment described herein. Also, the drawings herein are not drawn to scale.

[0076] Although the present invention is described by way of example in relation to a centrifugal pump, the scope of the invention is intended to include using the same in relation to other types or kinds of pumps either now known or later developed in the future.

[0077] Although the invention has been described and illustrated with respect to exemplary embodiments thereof, the foregoing and various other additions and omissions may be made therein and thereto without departing from the spirit and scope of the present invention.