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Publication numberUS3597124 A
Publication typeGrant
Publication dateAug 3, 1971
Filing dateSep 4, 1969
Priority dateSep 4, 1969
Publication numberUS 3597124 A, US 3597124A, US-A-3597124, US3597124 A, US3597124A
InventorsAdams Robert P
Original AssigneeCenco Medical Health Supply Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Perastaltic pump
US 3597124 A
Abstract  available in
Images(2)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

United States Patent H 1 3,597,124

[72] Inventor Robert P. Adams 328,472 10/1885 Faller 103/149 h -Y- 2,102,523 12/1937 Ferrara et al.- 103/149 [21] Appl. No. 855,214 2,899,906 8/1959 Becher et a1 103/149 [22] Filed Sept. 4,1969 3,421,447 l/l969 Jackson et a1. 103/149 [45] Patented Aug. 3, 1971 Assignee CencoM Ii I" H pp y Corporation Primary Examiner-Carlton R. Croyle Assistant Examiner-Wilbur J. Goodlin Chicago Attomey-Robert E. Wagner [54] PERASTALTIC PUMP 2 Claims, 7 Drawing Figs.

(52] U.S.C| 417/477 1 Fo4b 43/12 ABSTRACT: A perastaltic pump having a plurality of rollers [50] Field of Search 103/149; mounted on a rotating pump whee] Compressible tubing is 230/168; 91/57; 7/477, supported by a tube support means which is manually operable to move the tubing into engagement with the rollers on the [56] References CM pumping wheel. Throughthe novel shape of the tubing sup- UNITED STATES PATENTS port means, the tube may be easily installed and removed and 271,257 1/1883 Morton 103/ l 49 functions to prevent tubing creep during operation.

Patented Aug. 3, 1971 2 Sheets-Sheet 1 INVENTO/r" ROBERT P ADAMS BY I/ Q] mm) GM 6 gy ATTY Patented Aug. 3, 1971 2 Sheets-Sheet 2 INVENTOR ROBERT I? ADAMS BY MflWATT I X PERASTALTIC PUMP This invention relates to positive-type displacement pumps in general and, more specifically, is directed to a new and imroved perastaltic pump of the type commonly used in biological, medicinal, chemical, industrial, surgical, pathological and similar type uses.

Perastaltic pumps, as such, are well known in the art and have filled a definite need in the industry over the years where it is desirable to isolate and control the flow through flexible tubing. Since the tubing forms the path for the fluid pumped and is readily removed, it may be autoclaved as a unit or fresh sterilized tubing substituted when required for diverse uses or experiments.

One problem which has existed in the prior art is the difficulty encountered in installation and removal of the tubing in prior art designs. No doubt, this difficulty was a result of proposed solutions to the problem of preventing tubing creep during the pumping cycle. Various means have been proposed to eliminate these problems, however, prior to the present invention, no solution has been proposed which would offer a simple and satisfactory answer.

The present invention provides a new and improved tubemounting arrangement in a perastaltic pump which permits the tubing to be easily installed and removed while preventing tubing creep without the use of complicated clamps or the like. A relatively simple cam-biased tube support is mounted for angular movement to disengage the tubing from the rollers carried on the pump wheel and permits lateral removal and installation. The cam permits the pressure on the tubing to be adjusted to the requirements of the tubing used.

It is an object of this invention to provide a new and improved perastaltic pump.

It is a further object of this invention to provide a new and improved tube-mounting arrangement for a perastaltic pump which permits removal and installation of the tubing with unequalled ease.

It is a still further object of this invention to provide a new and improved perastaltic pump having a simplified cam-biased tubing support means which prevents tubing creep during the pumping operation.

Objects in addition to those heretofore stated will appear from the following description made in reference to the accompanying drawings wherein:

FIG. 1 is a front elevational view of the perastaltic pump of the present invention with the tubing in position for pumping;

FIG. 2 is a view similar to FIG. 1 with the tubing removed;

FIG. 3 is an enlarged fragmentary elevational view with the pumping wheel broken away to show the cooperation of the rollers with the tubing and tubing support means;

FIG. 4 is a fragmentary side elevational view taken generally along the line 4-4 of FIG. 1;

FIG. 5 is a fragmentary side elevational view taken generally along the line 5-5 of FIG. 1;

FIG. 6 is a free body front elevational view of the tubing support means; and

FIG. 7 is a cross-sectional view taken generally along the line 7-7 ofFIG. 6.

Referring now to FIG. 1, reference numeral 10 indicates the perastaltic pump of the present invention including a pump housing 11 and front cover 12 which mounts a tubing support means indicated generally at 13 and a pumping wheel indicated generally at 14. The cover 12 also forms a mounting area for a switch 17 for turning the pump on and off and which may also have an indicator light 18 included in the circuit for visually detecting the condition of the pump.

A tube is wrapped around the tubing support means 13 in a manner to be described in greater detail in connection with FIGS. 3 and 6. A manually operated cam means 16 is mounted at the lower end of the housing 12 and cooperates with the tubing support means in a manner to become apparent.

Referring now to FIGS. 3--5, it can be seen that the pump wheel 14 includes spaced-apart plates 20 and 21 held on a shaft 19 and mounting a plurality of rollers 23 for rotation about individual shafts 24. As the pumping wheel 14 rotates, the rollers 23 are brought into engagement with the tubing 15, compressing it in a manner similar to that shown in FIGS. 1 and 3 and forcing the liquid through the tube 15. This function will be described in greater detail when the operation of the pump is given.

Referring now to FIG. 6, it can be seen that the tube support means 13 includes a tube-mounting portion 30 which may be formed with a shallow groove 31 which may be generally arcuate in cross section, conforming generally to the shape of the tubing to be supported. When viewed along its length, the groove 31 extends at an angle 32 to a point where the tubesupporting surface is generally tangential to, however, spaced from the path generated by pumping wheel 14. The tangential portion 33 merges with a smooth arcuate tube-reversing portion 34 which changes the direction of the tube support slightly in excess of The tubing 15 then enters the arcuate portion 34 formed on a radius of curvature substantially congruent. to the path traced by the rollers 23 at their outer extremity. The arcuate portion 34 terminates smoothly, merging into a straight or linear section 35 for leading the tube 15 away from the pumping area to the discharge area where the flow is directed. Retaining lugs 36 and 37 cooperate with the straight or linear mounting sections 33 and 35, respectively, to maintain the tube 15 positioned in the groove 31 on the tubemounting means.

As shown in FIGS. 3 and 7, an elastomeric pad 38 may line at least a part of the arcuate groove 34 to back the tube 15 in the area where the rollers 23 are actively squeezing the tube to perform the pumping function. The tube support means 13 is mounted for pivoting movement on the face 12 of the pump housing 11 through a bearing bolt 40 or the equivalent.

As best seen in FIGS. 1-3, the cam means 16 consists of a knoblike member 41 mounted through a pivot pin 44 and having a handle 42 which extends well outwardly of the housing cover 12 for ease of operation by the lab assistant or technician. The knob 41 is provided with a slow rise cam surface 43 and fiat side 46. As the handle 42 is manually rotated, the cam surface 43 engages a cooperating or follower surface 45 on the tube support means 13 to move the tube support means about the pivot 40 and bring the tube 15 into engagement with the rollers 23. As shown in FIG. 2, when the cam is rotated to a position where the fiat side 46 opposes the cam follower 45, the tube support means moves to the condition shown to facilitate easy removal and installation of the tube.

Operation of the perastaltic pump of the present invention is easily accomplished. A tube partially filled with a liquid is placed on the tube support means 13. The cam means 16 is rotated to bring the tube support and installed tubing 15 into engagement with the rollers 23 as shown in FIGS. 1 and 35. The pumping wheel 14 may then be turned on via switch 17 for rotation or, if desired, the pumping wheel 14 can be started in advance of moving the tubing into engagement with the rollers 23. Pumping of the liquid will continue so long as a fluid supply is available at the intake.

If desired, the pumping rollers 23 may be increased in overall length and multiple tracks provided on a single tubing support means of the same shape as that shown with the grooves supporting the tubing being parallel to each other. In this manner, uniform engagement of the tubing and rollers is assured for uniform pumping. This is especially helpful in those situations where the liquid is to be withdrawn while another is to be added at an equal rate. Through the use of a tubing support means of the type described herein, the tubing may be readily installed and removed, eliminating the need for special clamps and the like. Tubing creep is positively prevented without any need to constrict the tubing. Lateral stability is provided by the elastomeric pad 38 in the pumping region. The simplified design provides for a relatively inexpensive pump which is capable of extremely high performance characteristics. In the present design, a motor available on the open market having a mechanical brake is used to permit microvolumes to be pumped at desired intervals when coupled to a suitable timer.

Upon a consideration of the foregoing, it will become obvious to those skilled in the art that various modifications may be made without departing from the invention embodied herein.

1 claim:

1. In a perastaltic-type pump having a pump housing supporting a pumping wheel, said pumping wheel having means for engagement with a flexible tube through which material is pumped, the improvement comprising a tube support means mounted on said housing for movement toward and away from said pumping wheel, a tubing support surface on said tube support means, said tubing support surface being of generally U- shaped configuration to reverse the direction of the tube thereon and thereby prevent tubing creep during operation of said pump, said tube support surface including an angular entrance portion merging into a substantially linear section radially spaced from said pumping wheel, said linear section merging with a generally U-shaped end portion leading into a smooth arcuate portion adapted to be moved to a position closely spaced from said pumping wheel and a generally linear portion exiting from said arcuate portion.

2. The improvement is perastaltic-type pumps as defined in claim 1 wherein lug means is provided an opposition to each of said linear sections, said lug means maintaining said tube in contact with said linear sections to prevent tube creep during operation of said pump.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US271257 *Feb 7, 1882Jan 30, 1883 morton
US328472 *Aug 18, 1884Oct 20, 1885 Jacob falleb
US2102523 *Mar 23, 1936Dec 14, 1937Deen William EBlood transfusion machine
US2899906 *Feb 13, 1957Aug 18, 1959 Roller pumps
US3421447 *Oct 26, 1966Jan 14, 1969Challenge Cook Bros IncFluid pump
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3723030 *Mar 3, 1971Mar 27, 1973Buchler Instr DivisionPeristaltic pump with stacked components
US3737251 *Feb 8, 1971Jun 5, 1973Alphamedics Mfg CopPeristaltic pump
US3758239 *Dec 21, 1971Sep 11, 1973Ceskoslovenska Akademie VedControlled peristaltic pump
US3768934 *Mar 14, 1972Oct 30, 1973Tukiem TrustApparatus for continuously conveying semisolid material by the action of circulating squeeze rollers on a flexible conduit for the material
US4012177 *Aug 31, 1973Mar 15, 1977Yakich Sam SBlood pump tube element
US4187057 *Jan 11, 1978Feb 5, 1980Stewart-Naumann Laboratories, Inc.Peristaltic infusion pump and disposable cassette for use therewith
US4256442 *Apr 18, 1979Mar 17, 1981Baxter Travenol Laboratories, Inc.Improved pressure plate movement system for a peristaltic pump
US4367479 *Nov 3, 1980Jan 4, 1983Exxon Research And Engineering Co.Method and apparatus for purging and/or priming an ink jet
US4376283 *Nov 3, 1980Mar 8, 1983Exxon Research And Engineering Co.Method and apparatus for using a disposable ink jet assembly in a facsimile system and the like
US4813855 *Jun 26, 1987Mar 21, 1989Tek-Aids Inc.Peristaltic pump
US4832584 *Jan 15, 1988May 23, 1989Corpak, Inc.Rotor for peristaltic pump
US5256041 *Feb 5, 1993Oct 26, 1993Auto-Chlor System, IncorporatedPeristaltic pump arrangement
US5340290 *Dec 8, 1993Aug 23, 1994Scilog, Inc.Double feed peristaltic pump
US5349825 *May 18, 1993Sep 27, 1994H. C. Duke & Son, Inc.System and method for dispensing a confectionery product using a peristaltic pump
US5403277 *Jan 12, 1993Apr 4, 1995Minnesota Mining And Manufacturing CompanyIrrigation system with tubing cassette
US5626563 *Jan 11, 1995May 6, 1997Minnesota Mining And Manufacturing CompanyIrrigation system with tubing cassette
US5628731 *Dec 12, 1994May 13, 1997Minnesota Mining And Manufacturing CompanyIrrigation system with tubing cassette
US5630711 *Sep 8, 1995May 20, 1997Graymills CorporationPeristaltic pump having a loop-shaped tube path
US5746585 *Dec 31, 1996May 5, 1998Motorola, Inc.Peristaltic pump and method in a peristaltic pump for advancing a tube from a first position to a second position
US5897300 *May 19, 1997Apr 27, 1999Graymills CorporationQuick-release bolt for use with pump housing
US7066914Mar 16, 2005Jun 27, 2006Bird Products CorporationCatheter having a tip with an elongated collar
US7168930Sep 29, 2003Jan 30, 2007Bausch & Lomb IncorporatedPeristaltic pump with air venting via the movement of a pump head or a backing plate during surgery
US7214038 *Sep 12, 2003May 8, 2007Ismatec SaHose cartridge for a peristaltic pump
US7300264Sep 8, 2003Nov 27, 2007Hewlett-Packard Development, L.P.Peristaltic pump
US7445436Sep 29, 2003Nov 4, 2008Bausch & Lomb IncorporatedPeristaltic pump with a moveable pump head
US7722338 *Feb 10, 2005May 25, 2010Novasys Medical, Inc.Peristaltic pump providing simplified loading and improved tubing kink resistance
US7976518Jan 13, 2005Jul 12, 2011Corpak Medsystems, Inc.Tubing assembly and signal generator placement control device and method for use with catheter guidance systems
US8177781May 10, 2006May 15, 2012Novasys Medical, Inc.Apparatus and methods for treating female urinary incontinence
US8257054 *Mar 23, 2011Sep 4, 2012Curlin Medical Inc.Method of installing and removing a cassette from a pump body having a mounting pin
US8403927Apr 5, 2012Mar 26, 2013William Bruce ShingletonVasectomy devices and methods
US8465482Apr 10, 2012Jun 18, 2013Verathon, Inc.Apparatus and methods for treating female urinary incontinence
US8550310Dec 5, 2008Oct 8, 2013Bunn-O-Matic CorporationPeristaltic pump
US8740846Dec 17, 2012Jun 3, 2014Verathon, Inc.Treatment of tissue in sphincters, sinuses, and orifices
US20110171052 *Mar 23, 2011Jul 14, 2011Curlin Medical Inc.Peristaltic pump assembly
US20110253746 *Apr 15, 2011Oct 20, 2011O'keefe Jr Edward LWine dispensing system
DE4138682A1 *Nov 25, 1991May 27, 1993Kaltenbach & VoigtSurgical dentistry appts. with pumped cooling medium supply - has pump having slider adjusting spacing between driven pump element and counter-bearing for replacement of cooling medium hose
EP1400691A2 *Sep 8, 2003Mar 24, 2004Ismatec SA, LaboratoriumstechnikTube cassette for peristaltic pump
Classifications
U.S. Classification417/477.11, 417/12, 417/477.9
International ClassificationF04B43/12
Cooperative ClassificationF04B43/1284
European ClassificationF04B43/12G8