US20030113220A1 - Eccentric device peristaltic pump - Google Patents
Eccentric device peristaltic pump Download PDFInfo
- Publication number
- US20030113220A1 US20030113220A1 US10/023,390 US2339001A US2003113220A1 US 20030113220 A1 US20030113220 A1 US 20030113220A1 US 2339001 A US2339001 A US 2339001A US 2003113220 A1 US2003113220 A1 US 2003113220A1
- Authority
- US
- United States
- Prior art keywords
- pump
- backing plate
- orbiter
- tubing
- loop
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- 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
- F04B43/123—Machines, pumps, or pumping installations having flexible working members having peristaltic action using an excenter as the squeezing element
Definitions
- the present invention relates to peristaltic pumps for use in surgery, especially ophthalmic surgery. More particularly, the present invention is directed to an eccentrically driven peristaltic pump.
- Prior art peristaltic pumps typically consist of a series of evenly spaced rollers which engage a length of tubing.
- the rollers pinch the tubing against a fixed surface or stretch the aspiration tubing, such that the flow is pinched-off.
- the rollers or pump head continues to rotate, displacing a discrete quantity of fluid in a peristaltic fashion and in the direction of rotation. It has been said that the peristaltic pump head “milks” the fluid through the aspiration tubing via repeated compressions.
- the peristaltic pump regulates aspiration flow rate by controlling the speed of the rotation of the pump head.
- the speed, or numbers of revolutions per minute of the pump head is increased.
- Increasing the speed of the pump head causes a larger number of discrete quantities of fluid to be displaced in a given period of time.
- Each revolution of the pump head displaces a constant volume of fluid.
- Known peristaltic pump heads typically include a plurality of rollers collectively rotatable about a central axis. Such a construction requires many moving parts. This in turn, leads to complexity and expense in the manufacturing process, as well as the potential for each moving part to break-down.
- FIG. 1 is a front elevation of a pump cartridge in accordance with one aspect of the present invention
- FIG. 2 is a partial side elevation of FIG. 1 taken along line 2 - 2 ;
- FIG. 3 is a partial front elevation of a peristaltic pump in accordance with the present invention.
- FIG. 5 is a partial front elevation of a peristaltic pump, including surgical tubing in accordance with the present invention.
- FIG. 6 is a partial side elevation of FIG. 5 taking along line 6 - 6 .
- the backing plate or surface 14 surrounds the loop of tubing 16 .
- fluid is pumped through tubing 16 from inlet 20 in the direction of arrow 22 , and the pumped fluid exists at outlet 24 in the direction of arrow 26 to be collected in a bag or reservoir (not shown).
- Pump cartridge 10 requires at least a 360° loop of tubing, and preferably the 540° loop of tubing 16 shown in FIGS. 1 and 2. It will be appreciated that while a 360° loop of tubing is required for operation of the pump, more of less than the preferred 540° of looped tubing may also be used.
- FIG. 3 illustrates a peristaltic pump in accordance with the present invention.
- Peristaltic pump 30 includes a housing 32 , a 360° backing plate (formed by a combination of surface 14 and arcuate portion 34 .
- Arcuate portion 34 is preferably attached to the housing as shown.
- peristaltic pump 30 includes an orbiter 36 for eccentrically orbiting within the backing plate as indicated by arrow 38 .
- the arc of surface 35 should be centered about a center of the orbit of orbiter 36 as shown by arrow 39 .
- Orbiter 36 includes a centrally mounted bearing 40 that orbits in a radius about arrow 38 as indicated by dashed lines representing bearing 40 .
- FIG. 4 is a side elevation of the pump of FIG. 3.
- bearing 40 is attached to collar 42 , in an off-set manner, with drive shaft 44 , such that orbiter 36 will rotate or orbit in an eccentric fashion relative to arcuate portion 34 which forms a portion of the backing plate.
- bearing 40 is attached to collar 42 such that orbiter 36 orbits rather than rotates. That is to say, the point indicated by arrow 46 will always remain at the top or apex of orbiter 36 . This is desirable to reduce the need for lubricants between orbiter 36 and tubing 16 to reduce friction.
- FIG. 3 shows orbiter 36 in its lowest-most, orbital position.
- FIG. 5 shows orbiter 36 in its upper-most, orbital position.
- FIG. 5 shows a loop of tubing 16 surrounding the orbiter 36 and placed between the orbiter 36 and the backing plate (formed by surface 14 and surface 35 ).
- Tubing 16 has an inlet 20 and an outlet 24 .
- one region of the loop of tubing 16 will be pinched (in the position shown in FIG. 5 the pinched portion corresponds with the point at arrow 46 ) between the orbiter 36 and the backing plate, such that the loop of tubing 16 remains pinched at all times during the eccentric orbit of the orbiter 36 within the backing plate. This causes fluid to be pumped through the inlet 20 to the outlet 24 .
- the cartridge housing 12 may be formed to be attached to the arcuate portion 32 , which is fixedly attached to a housing 34 of the pump 30 , such that the backing plate portion (surface 14 ) of the cartridge and the arcuate portion 34 cooperate to form a 360° backing plate.
- Pump cartridge 10 may be formed to attach to pump 30 by frictionally attaching to arcuate portion 34 or by any other known means, such as with a drawer or other suitable capture mechanism. While the embodiment shown discloses the 360° backing plate being formed by the joinder of cartridge 10 and arcuate portion 34 , a unitary or monolithic 360° backing plate may be used.
- a cartridge would be unnecessary and tubing 16 would be simply looped around orbiter 36 .
- a cartridge forming the full 360° backing plate could also be used. This would simply be done by incorporating arcuate portion 34 into cartridge 10 .
- FIG. 6 is a partial elevation of FIG. 5 taken along line 6 - 6 .
- orbiter 36 has tubing 16 pinched closed as seen at 48 .
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
A peristaltic pump 30 includes a 360° backing plate 14 and 35 and an orbiter 36 for eccentrically orbiting within the backing plate. A loop of tubing 16 surrounds the orbiter 36 and is placed between the orbiter 36 and the backing plate.
Description
- 1. Field of the Invention
- The present invention relates to peristaltic pumps for use in surgery, especially ophthalmic surgery. More particularly, the present invention is directed to an eccentrically driven peristaltic pump.
- 2. Description of the Prior Art
- Peristaltic or flow-based pumps are well-known in the art.
- Prior art peristaltic pumps typically consist of a series of evenly spaced rollers which engage a length of tubing. The rollers pinch the tubing against a fixed surface or stretch the aspiration tubing, such that the flow is pinched-off. The rollers or pump head continues to rotate, displacing a discrete quantity of fluid in a peristaltic fashion and in the direction of rotation. It has been said that the peristaltic pump head “milks” the fluid through the aspiration tubing via repeated compressions.
- The peristaltic pump regulates aspiration flow rate by controlling the speed of the rotation of the pump head. To increase the aspiration flow rate, the speed, or numbers of revolutions per minute of the pump head is increased. Increasing the speed of the pump head causes a larger number of discrete quantities of fluid to be displaced in a given period of time. Each revolution of the pump head displaces a constant volume of fluid.
- Known peristaltic pump heads typically include a plurality of rollers collectively rotatable about a central axis. Such a construction requires many moving parts. This in turn, leads to complexity and expense in the manufacturing process, as well as the potential for each moving part to break-down.
- Therefore, it would be desirable to have a peristaltic pump which provides the desired even flow rate through the tubing with fewer parts, resulting in a more reliable pump.
- FIG. 1 is a front elevation of a pump cartridge in accordance with one aspect of the present invention;
- FIG. 2 is a partial side elevation of FIG. 1 taken along line2-2;
- FIG. 3 is a partial front elevation of a peristaltic pump in accordance with the present invention;
- FIG. 4 is a side elevation of FIG. 3 taken along line4-4;
- FIG. 5 is a partial front elevation of a peristaltic pump, including surgical tubing in accordance with the present invention; and
- FIG. 6 is a partial side elevation of FIG. 5 taking along line6-6.
- A
pump cartridge 10 as shown in FIG. 1 for use with the inventive pump described in detailed below.Pump cartridge 10 includes acartridge housing 12, such that a portion of thehousing 12 forms at least a portion of a backing plate for the pump described below. In addition, thehousing 12 is structured to be attached to the pump. In FIG. 1, the arcuate portion ofsurface 14 of thehousing 12 acts as a backing plate. Cartridge 10 also includes at least a 360° loop oftubing 16. The tubing is retained by the backing plate portion viatabs 18 or other suitable mechanisms or adhesive. - As seen in FIG. 2, the backing plate or
surface 14 surrounds the loop oftubing 16. Referring back to FIG. 1, fluid is pumped throughtubing 16 frominlet 20 in the direction ofarrow 22, and the pumped fluid exists atoutlet 24 in the direction ofarrow 26 to be collected in a bag or reservoir (not shown).Pump cartridge 10 requires at least a 360° loop of tubing, and preferably the 540° loop oftubing 16 shown in FIGS. 1 and 2. It will be appreciated that while a 360° loop of tubing is required for operation of the pump, more of less than the preferred 540° of looped tubing may also be used. - FIG. 3 illustrates a peristaltic pump in accordance with the present invention.
Peristaltic pump 30 includes ahousing 32, a 360° backing plate (formed by a combination ofsurface 14 andarcuate portion 34.Arcuate portion 34 is preferably attached to the housing as shown. In addition,peristaltic pump 30 includes anorbiter 36 for eccentrically orbiting within the backing plate as indicated by arrow 38. The arc ofsurface 35 should be centered about a center of the orbit oforbiter 36 as shown byarrow 39. -
Orbiter 36 includes a centrally mounted bearing 40 that orbits in a radius about arrow 38 as indicated by dashed lines representing bearing 40. - FIG. 4 is a side elevation of the pump of FIG. 3. As seen,
bearing 40 is attached tocollar 42, in an off-set manner, withdrive shaft 44, such thatorbiter 36 will rotate or orbit in an eccentric fashion relative toarcuate portion 34 which forms a portion of the backing plate. Preferably, bearing 40 is attached tocollar 42 such thatorbiter 36 orbits rather than rotates. That is to say, the point indicated byarrow 46 will always remain at the top or apex oforbiter 36. This is desirable to reduce the need for lubricants betweenorbiter 36 andtubing 16 to reduce friction. - FIG. 3 shows
orbiter 36 in its lowest-most, orbital position. In contrast, FIG. 5 showsorbiter 36 in its upper-most, orbital position. In addition, FIG. 5 shows a loop oftubing 16 surrounding theorbiter 36 and placed between theorbiter 36 and the backing plate (formed bysurface 14 and surface 35). Tubing 16 has aninlet 20 and anoutlet 24. Upon activation of theorbiter 36, one region of the loop oftubing 16 will be pinched (in the position shown in FIG. 5 the pinched portion corresponds with the point at arrow 46) between theorbiter 36 and the backing plate, such that the loop oftubing 16 remains pinched at all times during the eccentric orbit of theorbiter 36 within the backing plate. This causes fluid to be pumped through theinlet 20 to theoutlet 24. - The
cartridge housing 12 may be formed to be attached to thearcuate portion 32, which is fixedly attached to ahousing 34 of thepump 30, such that the backing plate portion (surface 14) of the cartridge and thearcuate portion 34 cooperate to form a 360° backing plate.Pump cartridge 10 may be formed to attach to pump 30 by frictionally attaching toarcuate portion 34 or by any other known means, such as with a drawer or other suitable capture mechanism. While the embodiment shown discloses the 360° backing plate being formed by the joinder ofcartridge 10 andarcuate portion 34, a unitary or monolithic 360° backing plate may be used. If a unitary 360° backing plate is used, it is contemplated that a cartridge would be unnecessary andtubing 16 would be simply looped aroundorbiter 36. Similarly, a cartridge forming the full 360° backing plate could also be used. This would simply be done by incorporatingarcuate portion 34 intocartridge 10. - FIG. 6 is a partial elevation of FIG. 5 taken along line6-6. As can be seen,
orbiter 36 hastubing 16 pinched closed as seen at 48. - In operation, as
orbiter 36 orbits within the backing plate, a volume of fluid is drawn frominlet 20 tooutlet 24 by the pinching action. In this way, fluid and tissue can be drawn from a surgical site and deposited in a collection bag (not shown). Obviously, the higher the orbiting rate oforbiter 36, the greater the volume of fluid per unit of time that will be moved through thetubing 16. The speed oforbiter 36 is controlled by the rotation speed ofshaft 44.
Claims (10)
1. A peristaltic pump comprising:
a 360° backing plate;
an orbiter for eccentrically orbiting within the backing plate;
a loop of tubing surrounding the orbiter and placed between the orbiter and the backing plate, the tubing having an inlet and an outlet;
wherein upon activation of the orbiter, one region of the loop of tubing will be pinched between the orbiter and the backing plate such that the loop of tubing remains pinched at all times during the eccentric orbit of the orbiter within the backing plate; and
thereby causing fluid to be pumped from the inlet to the outlet.
2. The pump of claim 1 wherein the backing plate is formed by a combination of a pump cartridge and an arcuate portion attached to the housing.
3. The pump of claim 1 wherein the tubing loop forms at least a 360° loop.
4. The pump of claim 1 wherein the tubing loop forms at least a 540° loop.
5. A pump cartridge comprising;
a cartridge housing wherein a portion of the housing forms at least a portion of a backing plate for a pump and is structured to be attached to the pump; at least a 360° loop of tubing; and
wherein the backing plate portion retains and surrounds at least a portion of the loop of tubing.
6. The pump cartridge of claim 5 wherein the cartridge housing is formed to be attached to an arcuate portion fixedly attached to a housing of the pump such that the backing plate portion of the cartridge and the arcuate portion cooperate to form a 360° backing plate.
7. A peristaltic pump comprising:
a housing;
a 360° backing plate formed in the housing;
an orbiter for eccentrically orbiting within the backing plate; and
wherein upon activation of the orbiter, one region of a loop of tubing surrounding the orbiter will be pinched between the orbiter and the backing plate at all times during the orbit of the orbiter.
8. The pump of claim 7 further including at least a 360° loop of tubing surrounding the orbiter.
9. The pump of claim 8 wherein the loop of tubing and the backing plate are combined to form a pump cartridge.
10. A pump cartridge comprising:
a cartridge housing including structure forming a backing plate for a pump;
attachment means for attaching the cartridge to the pump; and
at least a 360° loop of tubing surrounded by and adjacent to the backing place.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/023,390 US20030113220A1 (en) | 2001-12-17 | 2001-12-17 | Eccentric device peristaltic pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/023,390 US20030113220A1 (en) | 2001-12-17 | 2001-12-17 | Eccentric device peristaltic pump |
Publications (1)
Publication Number | Publication Date |
---|---|
US20030113220A1 true US20030113220A1 (en) | 2003-06-19 |
Family
ID=21814804
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/023,390 Abandoned US20030113220A1 (en) | 2001-12-17 | 2001-12-17 | Eccentric device peristaltic pump |
Country Status (1)
Country | Link |
---|---|
US (1) | US20030113220A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10842932B1 (en) | 2012-08-08 | 2020-11-24 | Neurowave Systems Inc. | Intelligent pharmaceutical delivery system with non-concentric pumping mechanism to reduce flow anomaly and method of using |
-
2001
- 2001-12-17 US US10/023,390 patent/US20030113220A1/en not_active Abandoned
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10842932B1 (en) | 2012-08-08 | 2020-11-24 | Neurowave Systems Inc. | Intelligent pharmaceutical delivery system with non-concentric pumping mechanism to reduce flow anomaly and method of using |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5116121B2 (en) | Peristaltic pump flow control method and peristaltic pump | |
US4189286A (en) | Peristaltic pump | |
EP1105648B1 (en) | System and method for increased flow uniformity | |
US5665070A (en) | Infusion pump with magnetic bag compression | |
AU765877B2 (en) | Reducing power consumption in a peristaltic pump mechanism | |
US5092844A (en) | Intracatheter perfusion pump apparatus and method | |
US6527745B1 (en) | Irrigation-aspiration apparatus | |
US5415532A (en) | High effieciency balanced oscillating shuttle pump | |
US6439845B1 (en) | Blood pump | |
US5586872A (en) | Adjustable peristaltic pump | |
US8167592B2 (en) | Peristaltic pumping apparatus and method | |
US20150275886A1 (en) | Magnetically balanced finger-type peristaltic pump | |
EP3408537B1 (en) | Micro dosage peristaltic pump for micro dosage of fluid | |
EP1457677A3 (en) | Self-loading peristaltic pump for extracorporeal blood circuit | |
US6626867B1 (en) | Implantable drug infusion device with peristaltic pump using tube guides | |
JP5720193B2 (en) | Infusion pump | |
JPS58501413A (en) | A device for administering a solution to a patient at a precisely controlled rate | |
US20030113220A1 (en) | Eccentric device peristaltic pump | |
JP3267404B2 (en) | Drive control method for peristaltic infusion pump | |
EP3810223B1 (en) | Cassette for a flow control apparatus | |
JPH06103029B2 (en) | Peristaltic pump | |
US4948350A (en) | Hose pump | |
GB2290582A (en) | Peristaltic pumps | |
US20070266847A1 (en) | Heart Booster Pump | |
JPH0796033A (en) | Transfusion tube |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BAUSCH & LOMB INC., NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CULL, LAURENCE J.;REEL/FRAME:012400/0231 Effective date: 20011217 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |