|Publication number||US3756752 A|
|Publication date||Sep 4, 1973|
|Filing date||Dec 20, 1971|
|Priority date||Dec 20, 1971|
|Publication number||US 3756752 A, US 3756752A, US-A-3756752, US3756752 A, US3756752A|
|Original Assignee||Stenner G|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Non-Patent Citations (1), Referenced by (49), Classifications (6), Legal Events (2)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent 1 Stenner [4 1 Sept. 4, 1973 PERISTALTIC PUMP  Filed: Dec. 20, 1971  Appl. No.: 209,605
 US. Cl. 417/477, 226/91  Int. Cl. F04b 43/08, F04b 43/12, F04b 45/06  Field of Search 417/474, 475, 476, 417/477, 63; 418/45; 226/91  References Cited UNITED STATES PATENTS 3,502,034 3/1970 Pickup 417/477 X 3,227,092 1/1966 Clark 417/475 X 2,899,905 8/1959 Becher .J..'. 417/476 X 6/1971 lsreeli 417/476 X 4/1969 Hrdina 417/475 OTHER PUBLICATIONS Circular for Randolph Company, advertising their pump. Dated 5/7/62.
Primary Examiner--Car1ton R. Croyle Assistant Examiner-Richard E. I Attorney-George I-l. Baldwin, Arthur G. Yeager et a1.
5 Claims, 6 Drawing Figures PAIENIEW 3.756.752
SHEEI 1 BF 2 INVENTOR A 7' TOR/YE) '1 1 1 .5 i Mm;
PArEmw SHfU 2 0F 2 GUSTAV H. STENNER IN l/E N TOR A TTOR/VE Y PERISTALTIC PUMP This invention pertains to peristaltic pumps, and particularly to pumps useful for feeding chemicals at a controlled rate, such as for feeding liquid chlorine chemicals into swimming pools.
A general object of the invention is to improve the operation, simplify the construction, and simplify maintenance and repair procedures in peristaltic pumps.
A specific object of the invention is to simplify the replacement of the compressible pumping tube in a peristaltic pump.
The novel features which are believed to be characteristic of this invention are set forth with particularity in the appended claims.
The invention itself, however, both as to its organization and method of operation, together with further objects and advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawings, in which:
FIG. 1 is an end view of the pump element, with the end cover removed, showing the pumping tube arranged for insertion into operative position in the pump element housing;
FIG. 2 is a similar view showing the tube partially in position;
FIG. 3 is a similar view showing the tube completely installed; I
FIG. 4 is an end view of the cover element for the pump body;
FIG. 5 is a front exploded view of the pumping element housing showing the cover aligned for attachment to the body portion; and
FIG. 6 is a side elevation of a complete pump unit including the intermittent drive therefor, with certain parts broken away and partially in section.
As seen in FIGS. 1, 2, 3 and 4, the pump element body 1 includes a hollow cylindrical pumping chamber or cavity portion 2 in which a rotor assembly 3 is disposed. Rotor assembly 3 includes an outer disk 4, of which the outer surface 5 is substantially flush with the outer edge 6 of the cylindrical portion 2 of the housing. Mounted to and underlying the disk 4 are a plurality of rollers, such as rollers 7 and 8, which are freely rotatable on pins 9 and 10.
The compressible tube 11 includes a rigid nipple 12 fixedly attached to end 13 of the tube. The nipple 12 comprises a throat or groove portion 14 between its outer externally threaded end portion 15 and its inner end portion 16 which is of reduced external diameter, and the nipple nests in a socket generally identified at 17 formed in a boss 18 of the pump element body 1, whereby the discontinuous surfaces of the nipple and the socket include engaged shoulders in a tongue and groove connection retaining the nipple, and therefore the tube end 13, from being pulled into or pushed outwardly of the pumping chamber.
Disk 4 includes a guide finger or lip 19 bounding an open notch 20 which extends inwardly into disk 4 from its periphery. In order to position a tube 11 in the pumping chamber 2, nipple 12 is inserted into socket 17 into such a position that tube end 13 is inwardly of disk 4 and is generally aligned with the centers of rollers 7 and 8, with the major portion of tube 11 extending outwardly through notch 20. As the disk and roller assembly 3 is rotated in a counterclockwise direction as viewed in FIG. 1 from its position shown in that figure into the position shown in FIG. 2, tube 11 is guided by lip 19 down into the cylindrical pumping chamber or cavity 2 of the housing, with the tube passing along through notch 20, while roller 7 starts to roll along the tube in the cavity. Continuing rotation of the roller assembly 3 until notch 20 reaches a position opposite to a second socket 21 then permits the nipple 22, which is affixed to the opposite or output end 23 of tube 11, to be slipped into its respective socket 21 in the body.
The body 1, disk 4 and cap or cover 25 are each formed of a hard, transparent synthetic plastic material, whereby the tube is visible through the disk as it is being fed into position, as shown in FIG. 2, for example, and the interior of the pump can be seen during operation thereof. Leakage from the tube into the pumping chamber is thus visually detectable, and condition of the tube can be determined without disassembling the pump. Tube 11 is also transparent but is of a soft synthetic plastic material so as to be compressible into flattened shape by the rollers. Flow of liquid through the tube, during operation of the pump, is readily witnessed through the body 1, or through cap 25 and disk 4, and through the tube wall.
The inner face 26 of cover 25 is provided with two bosses 27 and 28 which are received, respectively, into sockets 17 and 21. Each of these bosses has an end surface such as shown at 29 on boss 27, for engagement with the portion of the tube end and the nipple portion which lie within the socket thereby to retain the-nipples securely in their respective sockets when the cover is in place.
Centrallywithin the cover is a projection 30 containing a sleeve bearing 31- for a drive shaft 32 keyed to rotor assembly 3 by means of keys 33.
Turning now to FIG. 6, it will be seen that rotor assembly 3 comprises a barrel 34 carrying outer disk 4 and inner disk 35 at its opposite ends. The barrel and disks are attached rigidly together, such as by the use of a suitablecement. Rollers 8 and 7, preferably of hard phenolic material, are mounted for free rotation between the disks. Pin 9 is shown, for example, having its ends embedded in the respective disks and mounting roller 7.
Shaft 32 is rotatable in bearing 31 and in sleeve bearing 37 housed in inner wall portion 38 of the pump body 1. The shaft has an enlarged portion 39 extending into a-roller over-running clutch 40 mounted in a main support housing 41. The clutch includes rollers or bearing needles 42 surrounding the shaft and permitting free rotation thereof in one direction in the manner of a needle hearing. The rollers or needles are arranged in individual eccentric cavities in the clutch, and, upon very slight rotation of the shaft in the opposite direction, the needles jam between the shaft and the fixed clutch housing 43 thereby preventing rotation of the shaft in said opposite direction. The shaft 32 mounts a drive disk 44 having a plurality of openingsfor receiving a pin 45 of an intermittent drive arrangement 46 of the type shown and described in US. Pat. No. 2,975,719 issued Mar. 21, 1961, to Samuel Kaufman.
The intermittent drive includes an adjustment knob 47 for adjusting arm 48, a spring loaded follower 49 in cluding a sensing portion 50 for traversing groove 51 V and carrying pin 45. Pin 45 and follower 49 are carried on a gear wheel 52 which is driven by a motor 53. A flexible land member 54 fills more or less of groove 51 and serves to force'portion 50 generally outwardly of the groove, and thus to disengage pin 45 from disk 44 through a portion of each revolution of gear wheel 52.
While pin 45 is drivingly engaged with disk 44, shaft 32 is rotated with gear wheel 52. When pin 45 is disengaged, pressure in the tube 1 l on the output sides of the pump rollers tends to rotate shaft 32 in the aforementioned opposite direction resulting in jamming of the clutch rollers 42 on the shaft and thereby preventing such opposite rotation of the shaft.
It will be noted that cover 25 is attached to body 1 by self tapping screws or bolts 55 and that the body is similarly attached to support housing 41 by screws or bolts 56.
lt will be understood that the nipples 12 and 22 are attached to respective external inlet and outlet conduits for pumping of fluids through the tube 11. In replacing the pump tube, the cover 25 is removed, nipples l2 and 22 are detached from the external inlet and outlet conduits, and the motor is operated sufficiently to bring notch 20 into alignment with socket 14. The nipple 12 is now pulled out of its socket so that the tube extends through notch 20. With continued operation of the motor, and with a pull exerted on the nipple 12, the tube is gradually fed out of the chamber 2 until the notch 20 aligns with socket 21, at which time nipple 22 is removed. A new tube 1 l is replaced by a similar procedure, first aligning notch 20 with socket 17 and inserting nipple 12 into this socket with the tube extending from its end 13 outwardly through the notch. As rotor is now rotated, the tube is gradually fed into chamber 2 by lip 19 until the notch reaches socket 21, at which time nipple 22 is slipped into this socket. Replacement of cover 25 and reattachment of the nipples to the external conduits completes the replacement procedure.
While the invention has been described with respect to a certain specific embodiment, it will be appreciated that many modifications and changes may be made by those skilled in the art without departing from the spirit of the invention. It is intended, therefore, by the appended claims to cover all such modifications and changes as fall within the true spirit and scope of the invention.
What is claimed as new and what it is desired to secure by Letters Patent of the United States is:
1. In a peristaltic pump comprising a pump body with an internal generally cylindrical wall between an open front side to a back side of said body, said wall defining a generally cylindrical pumping chamber in said body, said body comprising a tube anchoring socket communicating with said chamber and an opening through said body into said chamber and said opening being laterally exposed through the front side of said body, said opening being peripherally displaced around said wall from said socket, a pumping tube, anchoring means at one end of said tube for anchoring engagement in said socket, a rotatable shaft coaxial with said cylindrical chamber, a tube compressing element carried by said shaft disposed within said chamber for traversingly compressing said tube against said wall upon rotation of said shaft, tube inserting guide means fixed to said shaft and rotatable therewith, said guide means comprising a finger portion extending generally radially from said shaft toward said wall and disposed between said socket and said open front side, said finger portion being adapted and arranged upon rotation of said shaft to feed said tube, when its said anchoring means is so anchored in said socket, into said chamber along said wall from said socket to said opening.
2. The combination according to claim 1 wherein said opening comprises a second socket and the other end of said tube is provided with anchoring means for anchoring engagement therein.
3. The combination according to claim 2 wherein said anchoring means and sockets include interfitting surfaces forming respective tongue and groove connections for retaining said tube ends against longitudinal movement therein.
4. The combination according to claim 1 wherein said guide means comprises a disk of which said finger portion comprises a lip of a tube-passing notch extending into the peripheral edge portion of the disk, and wherein said disk mounts said element and at least one additional tube compressing element.
5. The combination according to claim 4 wherein said body is provided with transparent front cover means removably attached thereto and wherein said disk is transparent.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2899905 *||Sep 11, 1956||Aug 18, 1959||becher|
|US3227092 *||Oct 28, 1963||Jan 4, 1966||Clark Jr Leland C||Fluid pump|
|US3437050 *||Jan 9, 1967||Apr 8, 1969||Ceskoslovenska Akademie Ved||Peristaltic pumping device|
|US3502034 *||Aug 20, 1968||Mar 24, 1970||Extracorporeal Med Spec||Roller pump heads|
|US3582234 *||Jul 14, 1969||Jun 1, 1971||Technicon Corp||Method and apparatus for the calibration of tubing to provide for a desired flow rate therethrough|
|1||*||Circular for Randolph Company, advertising their pump. Dated 5/7/62.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3899010 *||Dec 7, 1973||Aug 12, 1975||Pfleger Frederick W||Volume control system for liquid packaging apparatus|
|US3963023 *||Nov 4, 1974||Jun 15, 1976||Cobe Laboratories, Inc.||Extracorporeal blood circulation system and pump|
|US4184815 *||Mar 14, 1977||Jan 22, 1980||Extracorporeal Medical Specialties, Inc.||Roller pump rotor with integral spring arms|
|US4189286 *||Mar 17, 1978||Feb 19, 1980||Fibra-Sonics, Inc.||Peristaltic pump|
|US4256442 *||Apr 18, 1979||Mar 17, 1981||Baxter Travenol Laboratories, Inc.||Improved pressure plate movement system for a peristaltic pump|
|US4315718 *||Sep 17, 1979||Feb 16, 1982||Cole-Parmer Instrument Company||Peristaltic pump and bearing arrangement therefor|
|US4500269 *||Nov 30, 1983||Feb 19, 1985||Cormed, Inc.||Integral tube-loading assembly for peristaltic pump|
|US4573887 *||Sep 16, 1983||Mar 4, 1986||S. E. Rykoff & Co.||Corrosion-resistant roller-type pump|
|US4585399 *||Jun 12, 1985||Apr 29, 1986||Richard Wolf Gmbh||Hose pump|
|US4631008 *||Nov 4, 1985||Dec 23, 1986||G. H. Stenner & Co., Inc.||Peristaltic pump housing|
|US4705464 *||May 9, 1986||Nov 10, 1987||Surgidev Corporation||Medicine pump|
|US4856972 *||Jun 9, 1988||Aug 15, 1989||Fisher Scientific Co.||Dual roller peristaltic pump|
|US5031258 *||Jul 12, 1989||Jul 16, 1991||Bauer Industries Inc.||Wash station and method of operation|
|US5588815 *||Nov 15, 1995||Dec 31, 1996||Alcon Laboratories, Inc.||Surgical cassette loading and unloading system|
|US5781942 *||Apr 4, 1997||Jul 21, 1998||Sloan Valve Company||Wash stations and method of operation|
|US5842841 *||Jun 24, 1996||Dec 1, 1998||Baxter International, Inc.||Volumetric infusion pump with transverse tube loader|
|US5971726 *||Jul 24, 1997||Oct 26, 1999||Kaneka Corporation||Tube connector restriction means for a tube-type roller pump|
|US6322330 *||Jul 28, 1999||Nov 27, 2001||Carlisle A. Thomas||Compact peristaltic metering pump|
|US6494692 *||Apr 28, 2000||Dec 17, 2002||Watson-Marlow Limited||Peristaltic pumps|
|US6997905||Jun 14, 2002||Feb 14, 2006||Baxter International Inc.||Dual orientation display for a medical device|
|US7018361||Jun 14, 2002||Mar 28, 2006||Baxter International Inc.||Infusion pump|
|US7070578||Apr 25, 2002||Jul 4, 2006||Alcon, Inc.||Surgical cassette latching mechanism|
|US7597546 *||Mar 2, 2006||Oct 6, 2009||Lifebridge Medizintechnik Ag||Hose pump|
|US7608060||Dec 28, 2005||Oct 27, 2009||Baxter International Inc.||Infusion pump|
|US7712802||Jun 12, 2006||May 11, 2010||Alcon, Inc.||Cassette clamping mechanism|
|US8105269||Oct 24, 2008||Jan 31, 2012||Baxter International Inc.||In situ tubing measurements for infusion pumps|
|US8137083||Mar 11, 2009||Mar 20, 2012||Baxter International Inc.||Infusion pump actuators, system and method for controlling medical fluid flowrate|
|US8162634||Dec 1, 2006||Apr 24, 2012||Michigan Critical Care Consultants, Inc.||Pulsatile rotary ventricular pump|
|US8226591||Aug 5, 2009||Jul 24, 2012||Michigan Critical Care Consultants, Inc.||Apparatus and method for monitoring and controlling extracorporeal blood flow relative to patient fluid status|
|US8234128||Dec 30, 2003||Jul 31, 2012||Baxter International, Inc.||System and method for verifying medical device operational parameters|
|US8382447||Dec 31, 2009||Feb 26, 2013||Baxter International, Inc.||Shuttle pump with controlled geometry|
|US8469682||Sep 17, 2010||Jun 25, 2013||Molon Motor And Coil Corporation||Peristaltic pump with torque relief|
|US8496613||Jan 30, 2012||Jul 30, 2013||Baxter International Inc.||In situ tubing measurements for infusion pumps|
|US8567235||Jun 29, 2010||Oct 29, 2013||Baxter International Inc.||Tube measurement technique using linear actuator and pressure sensor|
|US8568289||May 22, 2012||Oct 29, 2013||Michigan Critical Care Consultants, Inc.||Apparatus and method for monitoring and controlling extracorporeal blood flow relative to patient fluid status|
|US8585379||Jun 22, 2010||Nov 19, 2013||Molon Motor And Coil Corporation||Peristaltic pump that is resistant to torques and vibrations|
|US8678792||Apr 17, 2012||Mar 25, 2014||Michigan Critical Care Consultants, Inc.||Pulsatile rotary ventricular pump|
|US8696632||Oct 5, 2009||Apr 15, 2014||Baxter International Inc.||Infusion pump with battery operation capability|
|US8775196||Dec 30, 2003||Jul 8, 2014||Baxter International Inc.||System and method for notification and escalation of medical data|
|US8888738||Aug 10, 2011||Nov 18, 2014||Baxter International Inc.||Infusion pump with multiple orientation display|
|US9004886 *||Sep 29, 2011||Apr 14, 2015||Zevex, Inc.||Pressure monitoring system for infusion pumps|
|US20060204388 *||Mar 2, 2006||Sep 14, 2006||Lifebridge Medizintechnik Ag||Hose pump|
|US20070031272 *||Aug 5, 2005||Feb 8, 2007||Molon Motor And Coil Corporation||Peristaltic pump|
|US20120082576 *||Apr 5, 2012||Kent Beck||Pressure monitoring system for infusion pumps|
|US20130177463 *||Nov 2, 2012||Jul 11, 2013||Cheshire Electric Company, Llc||Precision peristaltic metering pump and device thereof|
|EP0019205A1 *||May 8, 1980||Nov 26, 1980||Dr. Strackharn Medizintechnik KG||Pump with flexible tube for medical purposes|
|EP0774266A2 *||Nov 11, 1996||May 21, 1997||Alcon Laboratories, Inc.||Surgical cassette loading and unloading system|
|EP0825345A2 *||Jul 24, 1997||Feb 25, 1998||Kaneka Corporation||Tube type roller pump|
|WO2010093946A1 *||Feb 12, 2010||Aug 19, 2010||Mc3, Inc.||Modular fluid pump with cartridge|
|U.S. Classification||417/477.1, 226/91, 4/509|
|Jul 7, 1986||AS02||Assignment of assignor's interest|
Owner name: G. H. STENNER & CO., INC., P. O. BOX 17065, JACKSO
Effective date: 19860630
Owner name: PERISTALTIC PUMP
|Jul 7, 1986||AS||Assignment|
Owner name: G. H. STENNER & CO., INC., P. O. BOX 17065, JACKSO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PERISTALTIC PUMP;REEL/FRAME:004574/0252
Effective date: 19860630