EP3449126A1 - Centerless pump - Google Patents
Centerless pumpInfo
- Publication number
- EP3449126A1 EP3449126A1 EP16900679.8A EP16900679A EP3449126A1 EP 3449126 A1 EP3449126 A1 EP 3449126A1 EP 16900679 A EP16900679 A EP 16900679A EP 3449126 A1 EP3449126 A1 EP 3449126A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- roller guide
- centerless rim
- pump
- centerless
- tube
- 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.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/14212—Pumping with an aspiration and an expulsion action
- A61M5/14232—Roller pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
- F04B43/09—Pumps having electric drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1238—Machines, pumps, or pumping installations having flexible working members having peristaltic action using only one roller as the squeezing element, the roller moving on an arc of a circle during squeezing
Definitions
- the embodiments discussed in the present disclosure relate to a centerless pump.
- peristaltic pumps Some pumps have moving parts, support members, or other components in the middle of the pump.
- One such type of pump includes peristaltic pumps.
- a peristaltic pump a series of rollers compress a tube to force fluid (e.g., a liquid or a gas) through the tube as the rollers progress along different parts of the tube.
- fluid e.g., a liquid or a gas
- One or more embodiments of the present disclosure may include a pump that includes a centerless rim, a first roller guide shaped to roll along the centerless rim such that as the first roller guide is rotated, friction between the first roller guide and the centerless rim causes a corresponding rotation of the centerless rim.
- the pump may also include a second roller guide shaped to roll along the centerless rim, and a plurality of peristaltic rollers coupled to the centerless rim.
- the pump may additionally include a tube housing disposed proximate the plurality of peristaltic rollers, and a tube disposed between the tube housing and the peristaltic rollers such that as the centerless rim is rotated, the peristaltic rollers compress the tube against the tube housing to create negative pressure within the tube.
- Figure 1 A illustrates a first perspective view of an example centerless pump
- Figure IB illustrates a second perspective view of the example centerless pump of Figure 1A
- Figure 2 illustrates a perspective view of an example centerless pump with a motor
- Figure 3A illustrates a first perspective view of an example manual powered centerless pump
- Figure 3B illustrates a second perspective view of the example centerless pump of
- Figure 4 illustrates a perspective view of an example centerless pump with a reservoir
- Figures 5A and 5B illustrate cross-sectional views of a portion of example pumps.
- a centerless pump may include a centerless rim with one or more peristaltic rollers coupled to the centerless rim.
- Rotation of the centerless rim may rotate the peristaltic rollers to compress a tube against a tube housing, thus operating in a peristaltic fashion.
- compression of the tube against the tube housing and the rolling progression of the peristaltic rollers may create a negative pressure within the tube to draw material into the tube behind the peristaltic rollers.
- the rolling progression of the peristaltic rollers may force material in front of the peristaltic rollers out of the tube.
- the centerless pump may additionally include a first roller guide shaped such that the centerless rim rolls along the first roller guide as the centerless rim is rotated. Because of static friction between the centerless rim and the first roller guide, rotation of the first roller guide may result in a corresponding rotation of the centerless rim, thereby rotating the peristaltic rollers.
- the first roller guide may be driven by manual power (e.g., a lever arm) or by motive power (e.g., a motor).
- the centerless pump may additionally include one or more other roller guides to support or otherwise direct the rotational motion of the centerless rim.
- the centerless pump may have a void of material in the middle of the centerless rim, although a point referred to as the "center” may be referenced for ease in discussing operation, relative positions, etc. of the present disclosure.
- the void formed in the centerless pump may be used to house a reservoir of material (e.g., fluid to be pumped by the centerless pump) or a battery, motor, or other components of the centerless pump.
- FIGs 1 A and IB illustrate a first and a second perspective view (respectively) of the same example centerless pump 100 viewed from the first and second perspective views, in accordance with one or more embodiments of the present disclosure.
- the centerless pump 100 may include a centerless rim 105 and a first roller guide 110 (viewable in Figure 1A) shaped and configured such that the centerless rim 105 rolls along the first roller guide 110 as the centerless rim 110 rotates. Because of static friction between the first roller guide 110 and the centerless rim 105, rotation of the first roller guide 110 may cause a corresponding rotation of the centerless rim 105 as the centerless rim 105 rolls along first roller guide 110.
- the centerless rim 105 may be suspended via the first roller guide 110 and one or more other roller guides 115 (e.g., a second roller guide 115a and a third roller guide 115b). As the centerless rim 105 is suspended and the first roller guide 110 is rotated, the centerless rim 105 may rotate about a center point of the centerless rim 105 in a plane that includes the first roller guide 110 and the second and third roller guides 115a and 115b. In these and other embodiments, the first roller guide 110 rolling along the centerless rim 105 may cause the centerless rim 105 to rotate around the center point of the centerless rim 105.
- the first roller guide 110 and/or the second and third roller guides 115a and 115b may be supported by a housing 145 or casing of the centerless pump 100.
- the housing 145 may function as an exoskeleton plate for the centerless rim 105, the first roller guide 110, and the second and third roller guides 115a and 115b.
- an axle of the first roller guide 110 may be coupled to the housing 145 such that the first roller guide 110 may not move with respect to the housing 145 except to rotate about the axle while the centerless rim 105 rotates about its center point.
- an axle of the second and/or third roller guides 115a and 115b may be fixedly coupled to the housing 145 such that the second and/or third roller guides 115a and 115b may not move with respect to the housing 145 except to rotate freely about the axle.
- one end or both ends of an axle may be fixedly coupled to the housing 145.
- the placement of the first roller guide 110 and/or the second and third roller guides 1 15a and 115b with respect to the housing 145 may define, restrict, guide, or otherwise control the rotational path of the centerless rim 105 within the housing 145.
- the first roller guide 110 may be caused to rotate, and because the first roller guide 110 and/or the second and third roller guides 115a and 115b are fixedly coupled to the housing 145, the centerless rim 105 may rotate about the center point of the centerless rim 105 while rolling along the first roller guide 110 and the second and third roller guides 115a and 115b.
- the centerless rim 105 may rotate without contacting any component of the housing 145.
- a profile of the centerless rim 105 may match a profile of the first roller guide 110.
- the first roller guide 110 may have a corresponding convex shape.
- the profile may be selected to provide adequate friction (e.g., to avoid slippage) between the centerless rim 105 and the first roller guide 110. Additionally or alternatively, the profile may be selected to provide support or physical path guidance to the rotation of the centerless rim 105.
- the second and third roller guides 115a and 1 15b may have the same or a similar profile to the first roller guide 110.
- the first roller guide 110 may be driven via manual power drive mechanism or motive power drive mechanism.
- the first roller guide 110 may be coupled to a crank, lever, or other manual mechanism by which a user may cause the first roller guide 110 to rotate to operate the centerless pump 100.
- the first roller guide 110 may be coupled to a motor to rotate the first roller guide 110.
- gears, gearboxes, etc. may be coupled between the drive mechanism and the first roller guide 110.
- one or more planetary gears may be disposed between the drive mechanism and the fist roller guide 110.
- a gearing ratio between the drive mechanism and the first roller guide may include approximately 5: 1 to 1 :5, 1 : 1 to 1 :5, 5: 1 to 1 : 1, 1 : 1 to 1 :3, or 1 : 1 to 1 : 1.5.
- the first roller guide 110 may be coupled to a drive mechanism to drive or otherwise rotate the first roller guide 110.
- the first roller guide 1 10 may be coupled to a crank, lever, or other manual mechanism by which a user may cause the first roller guide 110 to rotate to operate the centerless pump 100 manually.
- the first roller guide 110 may be coupled to a motor to drive the first roller guide 110.
- gears, gearboxes, etc. may be coupled between the drive mechanism and the first roller guide 110.
- one or more planetary gears may be disposed between the drive mechanism and the fist roller guide 110.
- a gearing ratio between the drive mechanism and the first roller guide may include approximately 5: 1 to 1 :5, 1 : 1 to 1 :5, 5: 1 to 1 : 1, 1 : 1 to 1 :3, or 1 : 1 to 1 : 1.5.
- the first roller guide 110 may include keys, teeth, or other features to engage or otherwise lock the first roller guide 110 to an axle or other component of the drive mechanism. Using the keys, teeth, or other features, when the axle or other component of the drive mechanism is rotated, the first roller guide 110 may also rotate. An example of such a feature may be illustrated and/or explained with reference to Figures 5A and 5B.
- either or both of the second or third roller guides 115a and 115b may be driven in addition to the first roller guide 110 being driven.
- the first roller guide 110 and the second roller guide 115a may be driven.
- the first roller guide 110, the second roller guide 115a and the third roller guide 115b may all be driven.
- the first roller guide 110 and the second and third roller guides 115a and 115b may be disposed at various locations around the centerless pump.
- the first roller guide 110 may be disposed between a six o'clock and a three o'clock position
- the second roller guide 115a may be disposed between a six o'clock and a nine o'clock position
- the third roller guide 115b may be disposed between a nine o'clock and a three o'clock position.
- the first roller guide 110 may be disposed at a four o'clock position
- the second roller guide 115a may be disposed at an eight o'clock position
- the third roller guide 115b may be disposed at a twelve o'clock position.
- the roller guides 110, 115a, and 115b may be evenly distributed about the centerless rim 105.
- One or more peristaltic rollers 120 (e.g., the peristaltic rollers 120a-120d) may be coupled to the centerless rim 105.
- the peristaltic rollers 120 may be coupled to the centerless rim 105 such that as the centerless rim 105 rotates, the peristaltic rollers 120a-120d may follow the trajectory of rotation of the centerless rim 105, tracing a generally circular path.
- the peristaltic rollers 120a-120d may be bolted or otherwise coupled to the centerless rim 105 via an axle such that the peristaltic rollers may rotate about the axle as they follow the trajectory of rotation of the centerless rim 105.
- peristaltic roller 120 is able to rotate around the axle, static friction between the peristaltic roller 120 and the tube 130 may cause the peristaltic roller 120 to rotate about the axle 135 as it moves along the tube 130 during rotation of the centerless rim 105 creating a pumping action in the tube 130.
- pumping action may be caused by the peristaltic rollers creating negative pressure in the tube 130 behind the peristaltic roller 120 and/or by the peristaltic roller 120 forcing material in the tube out of the tube 130.
- a tube housing 125 and a tube 130 may be disposed proximate the centerless rim 105 and the peristaltic rollers 120a-120d.
- the tube 130 may be disposed between the tube housing 125 and the peristaltic rollers 120.
- the tube housing 125 may have a shape generally matching a portion of the circular trajectory traced by the peristaltic rollers 120.
- the tube 130 may be disposed proximate the tube housing 125 and the peristaltic rollers 120 such that as the centerless rim 105 is rotated causing the peristaltic rollers 120 to follow the circular path, the peristaltic rollers 120 may compress the tube 130 against the tube housing 125.
- the peristaltic rollers 120 may generate a negative pressure within the tube 130 behind the peristaltic rollers 120. Additionally or alternatively, the peristaltic rollers 120 may force material within the tube 130 ahead of the peristaltic rollers 120 out of the tube 130 in the direction that the peristaltic rollers 120 are progressing.
- the distance between the peristaltic rollers 120, the width and/or diameters of the peristaltic rollers 120, and/or the number of peristaltic rollers may be varied.
- the amount of material pumped through the tube 130 for a give rotation of the centerless rim 105 may be varied. For example, if the centerless rim 105 is twenty inches in diameter and four peristaltic rollers 120 that are two inches in diameter and three-quarters of an inch wide, one rotation of the centerless rim 120 may pump approximately eight fluid ounces. As an additional example, if four fluid ounces were desired, eight rollers may be used.
- parameters of the tube 130 may also be varied, such as the diameter of the tube 130.
- the tube 130 may include a flexible and compressible material with elastic properties such that the tube 130 may return to its original shape after being compressed by the peristaltic rollers 120.
- the tube 130 may be made of a polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), silicone rubber, fluoropolymer, nitrile rubber (BR), synthetic rubber, chlorosulfonated polyethylene synthetic rubber (CSM), silicone, ethylene propylene diene monomer (EPDM) rubber, EPDM + polypropylene, polyurethane, natural rubber, etc., or any combinations thereof.
- PTFE polytetrafluoroethylene
- PVC polyvinyl chloride
- silicone rubber fluoropolymer
- BR nitrile rubber
- CSM chlorosulfonated polyethylene synthetic rubber
- silicone ethylene propylene diene monomer
- EPDM + polypropylene polyurethane, natural rubber, etc., or any combinations thereof.
- the tube housing 125 and/or the peristaltic rollers 120 may be sufficiently rigid to allow the tube 130 to be compressed between the tube housing 125 and the peristaltic rollers 120.
- the tube housing 125 and/or the peristaltic rollers 120 may be made of a material and/or a finish that may provide a surface sufficiently smooth to prevent or avoid puncture of the tube 130. Additionally or alternatively, the finish of the tube housing 125 and/or the peristaltic rollers 120 may be selected to minimize or reduce wear on the tube 130.
- the peristaltic rollers 120 may be a polyurethane or some other polymer material.
- a centerless plate 140 may be coupled to the centerless rim 105, and the peristaltic rollers may be coupled to the centerless rim 105 via the centerless plate 140.
- an axle 135 e.g., the axles 135a-135d
- the peristaltic roller 120 may be coupled to a face of the centerless plate 140 opposite the centerless rim.
- the face of the centerless plate 140 may include a protrusion or other feature to which the peristaltic roller 120 may be coupled.
- the axle 135 may include a bolt, rod, post, screw, or other connecting device.
- the axle 135 may be utilized to couple the peristaltic roller 120 directly to the centerless rim 105, for example, without the centerless plate 140.
- the centerless plate 140 may be approximately the same or a similar size and/or the same or a similar shape as the centerless rim 105 such that a void of material in the centerless rim 105 may be comparable in size and/or position to a void in material of the centerless plate 140.
- the centerless pump 100 may include a reservoir coupled to the tube 130.
- the reservoir may be configured to hold a fluid material and may be coupled to the tube 130 such that the fluid material may be drawn through the tube 130 via operation of the centerless pump 100 (e.g., via rotation of the peristaltic rollers 120 with respect to the tube 130).
- the centerless pump 100 may include dispensing component coupled to an end of the tube 130 opposite an end of the tube 130 coupled to the reservoir.
- the dispensing component may include a nozzle or other component or device configured to facilitate dispensing of the material from the tube 130. For example, as the peristaltic rollers 120 compress the tube 130, negative pressure within the tube 130 may draw fluid from the reservoir into the tube 130. Additionally or alternatively, the peristaltic rollers 120 may force the fluid out of the tube 130 via the dispensing component.
- the centerless pump 100 may be utilized in any of a variety of settings.
- the centerless pump 100 may be utilized to dispense a fluid such as a consumer fluid that may include soap, lotion, shampoo, syrup, honey, etc.
- the centerless pump 100 may be utilized in medical circumstances, such as the delivery of intravenous fluids, dialysis, etc.
- the centerless pump 100 may be advantageous because any fluid flowing through the tube 130 touches only the tube 130 and does not touch any other pump components (e.g., the peristaltic rollers 120, the first roller guide 110, or the centerless rim 105).
- the centerless pump 100 may be advantageous because a void is formed in the middle of the centerless pump 100 that may be used to store anything associated with the centerless pump 100, such as a reservoir of fluid, a motor, a battery, fuel, etc. Additionally, a gear reduction approach may be utilized to make a small, lightweight direct current (DC) motor viable as an alternative to conventional alternating current (AC) powered pumps. Such a feature may make the centerless pump 100 highly portable and easily powered by alternative sources of power such as solar power. The centerless pump 100 may be beneficial in field hospitals or other remote locations where AC power may be unavailable or unreliable and where continuous pumping may be important (e.g., dialysis machines at a field hospital or dialysis machines during transportation).
- DC direct current
- AC alternating current
- the centerless pump 100 may include more or fewer elements than those illustrated or described in the present disclosure.
- the centerless pump 100 may include a reservoir, a motor, or a battery.
- the centerless pump 100 may include fewer than three roller guides, or fewer than four peristaltic rollers.
- FIG 2 illustrates a perspective view of an example centerless pump 200 with a motor 220, in accordance with one or more embodiments of the present disclosure.
- the centerless pump 200 may be similar or analogous to the centerless pump 100 of Figures 1A and IB, and may include a centerless rim 205 (which may be similar or analogous to the centerless rim 105 of Figures 1A and IB) and a first roller guide 210 (which may be similar or analogous to the first roller guide 110 of Figures 1A and IB).
- the motor 220 may be disposed in the void of the centerless rim 205, in some embodiments.
- the motor 220 may receive power from a power source 230 to drive the motor.
- the motor 220 may be directly coupled to the first roller guide 210 (e.g., an output shaft of the motor 220 may be used as an axle that the first roller guide 210 is keyed to such that the output shaft and the first roller guide 210 move as a unitary body).
- a belt 240 or other mechanism may be coupled to the motor 220 and the first roller guide 210 to couple the motor 220 to the first roller guide 200 and to drive the first roller guide 210 when the motor rotates.
- the motor 220 may include an output gear, output shaft, etc.
- the belt 240 may be coupled, either directly or indirectly, to the first roller guide 210.
- the first roller guide 210 may be keyed to an axle such that the axle and the first roller guide 210 move as a single body, and the axle may include a gear or portion that engages with the belt 240. Powering the motor 220 may thus rotate the belt 240, which may drive the first roller guide 210. Driving the first roller guide 210 may cause a corresponding rotation of the centerless rim 205 as the first roller guide 210 rolls along the centerless rim 205.
- the motor 220 may include any device, system, or component configured to provide motive force to the first roller guide 210.
- the motor 220 may include an electric motor such as a direct current (DC) motor, an alternating current (AC) motor, a brush motor, a brushless motor, a shunt wound motor, a separately excited motor, a series wound motor, a compound wound motor, a permanent magnet motor, a servomotor, an induction motor, a synchronous motor, a linear induction motor, a synchronous linear motor, etc.
- the motor 220 may include a fuel consuming engine, such as a four stroke engine, a diesel engine, a two stroke engine, a Wankel engine, an Atkinson engine, a gnome rotary engine, etc.
- the motor 220 may include a small, high-speed, high-efficiency DC electric motor that may rotate at speeds greater than six thousand rotations per minute (RPM).
- RPM six thousand rotations per minute
- the power source 230 may include any device, system, or component configured to provide power or fuel to the motor 220.
- the power source 230 may include a single-use battery (e.g., zinc-carbon or alkaline batteries), a rechargeable battery (e.g., a lead-acid battery, a nickel-cadmium battery, a lithium-ion battery, etc.), a solar cell, a fossil-fuel consuming generator, a reservoir of fuel (e.g., a reservoir of fossil fuel such as gasoline), a fuel-cell, etc., or any combinations thereof.
- the power source 230 may be coupled to the motor 220, such as electrically coupled or fluidically coupled.
- the centerless pump 200 may include more or fewer elements than those illustrated or described in the present disclosure.
- the motor 220 may be directly coupled to the first roller guide 210.
- the centerless pump 200 may include fewer than three roller guides, or fewer than four peristaltic rollers.
- Figures 3 A and 3B illustrate a first and a second perspective view (respectively) of the same example manual powered centerless pump 300 viewed from the first and the second perspective views.
- the centerless pump 300 may be similar or analogous to the centerless pump 100 of Figures 1A and IB.
- the centerless pump 300 may include a first centerless rim 305 (which may be similar or analogous to the centerless rim 105 of Figures 1A and IB), a first roller guide 310 (which may be similar or analogous to the first roller guide 110 of Figures 1A and IB), second and third roller guides 315a and 315b (which may be similar or analogous to the second and third roller guides 115a and 115b of Figures 1A and IB), peristaltic rollers 320a-320d (which may be similar or analogous to the peristaltic rollers 120a-120d of Figures 1A and IB), a tube housing 325 (which may be similar or analogous to the tube housing 125 of Figures 1 A and IB), and a tube 330 (which may be similar or analogous to the tube 130 of Figures 1A and IB).
- a first centerless rim 305 which may be similar or analogous to the centerless rim 105 of Figures 1A and IB
- the centerless pump 300 may include a second centerless rim 335, a fourth roller guide 340, and fifth and sixth roller guides 345a and 345b.
- the fourth roller guide 340 and the fifth and sixth roller guides 345a and 345b may be shaped and configured to roll along the second centerless rim 335.
- the second centerless rim 335 may be similar or analogous to the first centerless rim 305, such as the same or similarly sized and/or the same or similarly positioned with respect to an axis of rotation.
- the second centerless rim 335 may be suspended by the fourth roller guide 340 and the fifth and sixth roller guides 345a and 345b.
- the second centerless rim 335 may rotate about a center point of the second centerless rim 335 in a generally circular path defined by the fourth roller guide 340 and the fifth and sixth roller guides 345a and 345b.
- the first centerless rim 305 is in a first plane and the second centerless rim 335 is in a second plane, and the first and the second planes may be generally parallel. Additionally or alternatively, the center point of the first centerless rim 305 may be in the first plane and the center point of the second centerless rim 335 may be in the second plane.
- the center points of each of the first centerless rim 305 and the second centerless rim 335 may lie generally on a single line that is generally perpendicular to the first and the second planes.
- the single line may be the axis of rotation for the first centerless rim 305 and the second centerless rim 335.
- a cylindrical-shaped void may be common to the first centerless rim 305 and the second centerless rim 335.
- the first roller guide 310 may be mechanically coupled to the fourth roller guide 340.
- a series of mechanical components may form the mechanical coupling between the first roller guide 310 and the fourth roller guide 340.
- one-way bearings 350 may be part of the mechanical coupling between the first roller guide 310 and the fourth roller guide 340.
- the one-way bearings 350 may couple the first roller guide 310 and the fourth roller guide 340 such that as the fourth roller guide 340 rotates in one direction, the first roller guide 310 also rotates in that same direction, but as the fourth roller guide 340 rotates in the other direction, the first roller guide 310 is unaffected.
- rotation of the fourth roller guide 340 in a counter-clockwise direction may cause a corresponding counter-clockwise rotation of the first roller guide 310, while rotation of the fourth roller guide 340 in a clockwise direction may have no effect on the first roller guide 310.
- a component that may form part of the mechanical coupling between the first roller guide 310 and the fourth roller guide 340 includes gears or gearboxes such as the first planetary gear 355a and the second planetary gear 355b.
- a planetary gear may be utilized to maintain the axis of rotation between the fourth roller guide 340 and the first roller guide 310 while gaining a mechanical advantage (or disadvantage). For example, if a target gearing ratio is 1 : 1 between rotations of the second centerless rim 335 and the first centerless rim 305, no planetary gears may be utilized.
- gearing ratio e.g., 5: 1 to 1 :5, 1 : 1 to 1 :5, 5: 1 to 1 : 1, 1 : 1 to 1 :3, or 1 : 1 to 1 : 1.5
- one or more planetary gears may be utilized to accomplish the target gearing ratio.
- the pump 300 may include a pump housing 365.
- one or more components of the mechanical coupling between the first roller guide 310 and the fourth roller guide 340 may be supported by the pump housing 365.
- an axle common to the first roller guide 310 and the fourth roller guide 340 may be coupled to the pump housing 365.
- one or more of the planetary gears 355a and 355b may be supported by the pump housing 365.
- an outer casing of the planetary gears or other gear box, or an annular gear of the planetary gears may be coupled to the pump housing 365.
- Supporting the mechanical coupling between the first roller guide 310 and the fourth roller guide 340 may in turn support the first roller guide 310 and/or the fourth roller guide 340.
- the first roller guide 310 and the fourth roller guide 340 may rotate about a common single axis while otherwise remaining in a fixed position.
- the mechanical coupling between the first roller guide 310 and the fourth roller guide 340 may be a direct coupling.
- a single axle may be shared between the first roller guide 310 and the fourth roller guide 340.
- either of the first roller guide 310 and the fourth roller guide 340 may be keyed to the axle such that the roller guide and the axle move as a single body and the other may be coupled to the axle via one-way bearings or other similar ratcheting mechanism.
- a rotation in one direction of the fourth roller guide 340 may cause a corresponding and equal rotation of the first roller guide 310 in the same direction, but as the fourth roller guide 340 rotates in the other direction, the first roller guide 310 may be unaffected.
- a common axle 360 may be shared between the second roller guide 315a and the fifth roller guide 345a.
- the common axle 360 may be generally parallel to the axis of rotation of the first centerless rim 305 and/or the second centerless rim 335.
- the common axle 360 may be fixedly coupled to a pump housing 365.
- the pump housing 365 may function as an exoskeleton plate for the first centerless rim 305 and/or the second centerless rim 335. Stated another way, the pump housing 365 may support the common axle 360 such that the second roller guide 315a and the fifth roller guide 345a may rotate about the common axle 360 while otherwise remaining in a fixed position.
- first centerless rim 305 and the second centerless rim 335 may rotate about their respective center points while rolling along the second roller guide 315a and the fifth roller guide 345a, respectively.
- the second roller guide 315a and/or the fifth roller guide 345a may include bearings, lubrication, and/or other features to facilitate the rotation of the second roller guide 315a and/or the fifth roller guide 345a about the common axle 360.
- the common axle 360 may be coupled to the pump housing 365 on one side (e.g., the side proximate the second centerless rim 335) or on both sides.
- the third roller guide 315b and the sixth roller guide 345b may be supported by an analogous or similar common axle.
- one or more of the axles or support members for roller guides of the centerless pump 300 may be spring -loaded or otherwise biased towards a respective centerless rim.
- the axle 360 may be disposed within a slot in the pump housing 365, the slot extending from the second centerless rim 335 and away from the second centerless rim 335.
- the axle 360 may be spring-loaded in the slot such that the second roller guide 315a provides an outward force against the second centerless rim 335.
- the axle 360 may be spring-loaded to pull the second roller guide 315a towards the first centerless rim 305 and/or to pull the fifth roller guide 345a towards the second centerless rim 335.
- a spring or other biasing member may increase the friction between the roller guide and the respective centerless rim. Additionally or alternatively, using a spring or other biasing member may allow for removal of the centerless rim by compressing the roller guide against the spring or other biasing member to release the centerless rim from the roller guide. Such a biasing feature may be applicable to any embodiments of the present disclosure (e.g., that illustrated in Figures 1 A/IB, 2, 4, and/or 5).
- the centerless pump 300 may additionally include a lever arm 370, handle, ratchet arm, or other driving mechanism coupled to the second centerless rim 335.
- the lever arm 370 may be welded, bolted, or otherwise directly coupled to the second centerless rim 335 at a position such as a ten o'clock position. Pulling the lever arm 370 may cause a corresponding rotation of the second centerless rim 335 about the center point of the second centerless rim 335.
- the lever arm 370 may be manually pulled in a downward motion. As the lever arm 370 is pulled down, the second centerless rim 335 may rotate about the center point of the second centerless rim 335. The rotation of the second centerless rim 335 may in turn cause rotation of the fourth roller guide 340 as the fourth roller guide 340 rolls along the second centerless rim 335.
- the mechanical coupling between the fourth roller guide 340 and the first roller guide 310 may cause a corresponding rotation in the first roller guide 310 when the fourth roller guide 340 is rotated.
- Rotation of the first roller guide 310 may cause a corresponding rotation of the fist centerless rim 305 about its center point as the first roller guide 310 rolls along the first centerless rim 305.
- Rotation of the first centerless rim 305 may cause the peristaltic rollers 320a-320d to roll along a generally circular path defined by the perimeter of the first centerless rim 305.
- the tube 330 may be compressed against the tube housing 325, creating a negative pressure in the tube 330 behind the peristaltic rollers 320a-320d. Additionally or alternatively, any material in the tube 330 may be pushed out of the tube 330 by the peristaltic rollers 320a-320d.
- a stop or other feature may constrain how far downward the lever arm 370 may travel, in turn, constraining how far the second centerless rim 335 may rotate in a counter-clockwise direction.
- the lever arm 370 may then be pushed upwards, or may be biased by a spring or other biasing member to return to a home position (e.g., the ten o'clock position).
- An additional stop or other feature may constrain how far upward the lever arm 370 may travel to return to the home position.
- the fourth roller guide 340 may prevent any corresponding rotation of the first roller guide 310 in a clockwise direction.
- one way bearings or another ratchet-like mechanisms may be utilized to allow the first roller guide 310 to move freely when the fourth roller guide 340 turns in a clockwise direction, while engaging the fourth roller guide 340 with the first roller guide 310 as the fourth roller guide 340 turns in a counter-clockwise direction.
- a first end of the tube 330 may be coupled to a reservoir of material.
- the reservoir may contain a fluid material and may be disposed within the cylindrically shaped void in the middle of the first centerless rim 305 and the second centerless rim 335.
- a nozzle 375 may be coupled to a second end of the tube 330 to facilitate dispensing of the material from the tube 330.
- the nozzle 375 may take a shape or form to direct the exiting flow of material from the tube 330.
- the nozzle 375 may be shaped and/or configured to allow for dispensing of the material from the tube 330 in a receiving container 380, such as a bottle.
- the centerless pump 300 may include more or fewer elements than those illustrated or described in the present disclosure.
- the centerless pump 300 may include a reservoir in the void in the middle of the pump 300.
- the centerless pump 300 may include fewer than three roller guides for either the first centerless rim 305 or the second centerless rim 335, or may include fewer than four peristaltic rollers.
- FIG 4 illustrates a perspective view of an example centerless pump 400 with a reservoir 410, in accordance with one or more embodiments of the present disclosure.
- the centerless pump 400 may be analogous or similar to the centerless pump 100 of Figures 1A and IB.
- the centerless pump 400 may include a void in the middle of the centerless pump.
- a reservoir 410 of material may be stored in the void.
- the centerless pump may maintain a smaller footprint than other traditional pumps.
- Such a space savings may be advantageous in settings in which space may be valuable, such as in a store, in a surgical suite, in a cargo aircraft (e.g., to resupply a field hospital), or in a space shuttle bay.
- the centerless pump 400 may include more or fewer elements than those illustrated or described in the present disclosure.
- the centerless pump 400 may include fewer than three roller guides, or fewer than four peristaltic rollers.
- Figures 5A and 5B illustrate cross-sectional views of a portion of example pumps 500a and 500b, and the pumps 50a and 50b may illustrate example profiles and/or form factors for centerless rims (e.g., a concave centerless rim 505a in Figure 5A and a convex centerless rim 505b in Figure 5B) and roller guides (e.g., a convex roller guide 510a in Figure 5A and a concave roller guide 510b in Figure 5B).
- centerless rims e.g., a concave centerless rim 505a in Figure 5A and a convex centerless rim 505b in Figure 5B
- roller guides e.g., a convex roller guide 510a in Figure 5A and a concave roller guide 510b in Figure 5B.
- the first roller guides 510a and 510b may include a shape or profile that matches a corresponding shape or profile of the centerless rims 505a and 505b, respectively.
- the first roller guide 510a may include a convex shape and the centerless rim 505a may include a concave shape, as illustrated in Figure 6A.
- the first roller guide 510b may include a concave shape and the centerless rim 505b may include a convex shape, as illustrated in Figure 5B. While the remaining description may be described with reference to Figure 5A, the disclosure is equally applicable to Figure 5B.
- Static friction between the first roller guide 510a and the centerless rim 505a may drive the centerless rim 505a with minimal frictional losses and minimal scrubbing on an outer surface of first roller guide 510a.
- the surface area between the first roller guide 510a and the centerless rim 505a may be maximized, thus reducing slippage between the first roller guide 510a and the centerless rim 505a.
- a first roller guide assembly 511a may include first oneway bearings 512.
- a first bridging driven shaft 513a may include a driven shaft with a key 514.
- the key 514 may lock the first roller guide 510a with the first bridging driven shaft 513a such that the first bridging driven shaft 513a and the first roller guide 510a move as a single body (e.g., when the first bridging driven shaft 513a rotates, the first roller guide 510a also rotates).
- the key 514 when the first bridging driven shaft 513a is rotated, static friction between the interior of the centerless rim 505a and the first roller guide 510a may rotate the centerless rim 505a.
- the first roller guide 510a may function as an input gear and the interior of the centerless rim 505a may function as an output gear, thus, constituting a first stage of gear reduction.
- the gear reduction may include a ratio of between approximately forty to one and two to one.
- the pumps 500a and/or 500b may include more or fewer elements than those illustrated and described in the present disclosure.
- the first roller guide 510a and/or the centerless rim 505a may take any shape, form or profile.
- the centerless pump may be very small in size (e.g., the centerless rim may be less than ten inches, less than five inches, or less than one inch in diameter) such that small volumes (e.g., milliliters or less) may be pumped.
- the centerless pump may be very large in size (e.g., the centerless rim may be tens of feet in diameter) such that large volumes (e.g., gallons, or tens of gallons) may be pumped.
- any disjunctive word or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms.
- the phrase “A or B” should be understood to include the possibilities of "A” or “B” or “A and B.”
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Hematology (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Anesthesiology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Reciprocating Pumps (AREA)
- External Artificial Organs (AREA)
- Massaging Devices (AREA)
- Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US2016/029398 WO2017188939A1 (en) | 2016-04-26 | 2016-04-26 | Centerless pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3449126A1 true EP3449126A1 (en) | 2019-03-06 |
EP3449126A4 EP3449126A4 (en) | 2019-11-27 |
Family
ID=60159864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16900679.8A Withdrawn EP3449126A4 (en) | 2016-04-26 | 2016-04-26 | Centerless pump |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP3449126A4 (en) |
JP (1) | JP6594569B2 (en) |
KR (1) | KR20190002565A (en) |
CN (1) | CN109416037A (en) |
AU (1) | AU2016405300B2 (en) |
CA (1) | CA3022353A1 (en) |
WO (1) | WO2017188939A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110315432B (en) * | 2019-07-10 | 2020-08-07 | 山东职业学院 | Centerless cylindrical forming grinding wheel dressing device |
CN113499507B (en) * | 2021-07-14 | 2022-09-23 | 巨翊科技(上海)有限公司 | Automatic clamp and mechanism for infusion tube |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2987004A (en) * | 1955-07-29 | 1961-06-06 | Jerome L Murray | Fluid pressure device |
DE3114127C2 (en) * | 1981-04-08 | 1984-06-07 | Fresenius AG, 6380 Bad Homburg | Roll pumps for medical purposes |
US4878622A (en) * | 1988-06-17 | 1989-11-07 | Ransburg Corporation | Peristaltic voltage block |
KR100473242B1 (en) * | 2001-07-18 | 2005-03-08 | 세이코 엡슨 가부시키가이샤 | Tube pump |
CN2584865Y (en) * | 2002-11-01 | 2003-11-05 | 杜明德 | Liquid automatic supply device |
JP4690034B2 (en) * | 2004-12-28 | 2011-06-01 | エスアイアイ・プリンテック株式会社 | Tube pump, inkjet recording apparatus, and ink supply method |
US8292604B2 (en) * | 2009-05-01 | 2012-10-23 | Xerox Corporation | Peristaltic pump |
US8790096B2 (en) * | 2009-05-06 | 2014-07-29 | Alcon Research, Ltd. | Multiple segmented peristaltic pump and cassette |
DE102010000592B3 (en) * | 2010-03-01 | 2011-06-16 | Ulrich Gmbh & Co. Kg | Peristaltic pump with planetary gear |
US8747084B2 (en) * | 2010-07-21 | 2014-06-10 | Aperia Technologies, Inc. | Peristaltic pump |
AU2012297028B2 (en) * | 2011-08-17 | 2016-06-30 | Société des Produits Nestlé S.A. | Linear peristaltic pump |
CN202851317U (en) * | 2012-10-23 | 2013-04-03 | 南京中竞科电子科技有限公司 | Miniature peristaltic pump for automatic liquid injection |
-
2016
- 2016-04-26 EP EP16900679.8A patent/EP3449126A4/en not_active Withdrawn
- 2016-04-26 CN CN201680087153.1A patent/CN109416037A/en active Pending
- 2016-04-26 AU AU2016405300A patent/AU2016405300B2/en not_active Ceased
- 2016-04-26 KR KR1020187034067A patent/KR20190002565A/en not_active Application Discontinuation
- 2016-04-26 CA CA3022353A patent/CA3022353A1/en not_active Abandoned
- 2016-04-26 JP JP2018555898A patent/JP6594569B2/en not_active Expired - Fee Related
- 2016-04-26 WO PCT/US2016/029398 patent/WO2017188939A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
AU2016405300B2 (en) | 2020-06-18 |
CA3022353A1 (en) | 2017-11-02 |
CN109416037A (en) | 2019-03-01 |
JP2019515174A (en) | 2019-06-06 |
JP6594569B2 (en) | 2019-10-23 |
WO2017188939A1 (en) | 2017-11-02 |
EP3449126A4 (en) | 2019-11-27 |
KR20190002565A (en) | 2019-01-08 |
AU2016405300A1 (en) | 2018-11-22 |
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