Biased Rollers Or Slides Patents (Class 417/477.7)
  • Patent number: 10487819
    Abstract: A peristaltic micropump includes one or more flexible channels configured to transfer one or more pumped fluids, and an actuator configured to engage the one or more flexible channels and rotate about a central axis. The actuator includes a plurality of rolling elements and a driving element configured such that the driving element operably rotates about the central axis and each rolling element operably rolls about a respective axis that is not parallel to the central axis. The plurality of rolling elements is disposed between the one or more flexible channels and the driving element. The driving element includes a cage configured to capture the plurality of rolling elements such that the plurality of rolling elements is located at different radii from a center of the cage.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: November 26, 2019
    Assignee: VANDERBILT UNIVERSITY
    Inventors: Parker A. Gould, Loi T. Hoang, Joseph R. Scherrer, William J. Matloff, Kevin T. Seale, Erica L. Curtis, David K. Schaffer, Douglas J. Hall, Ayeeshik Kole, Ronald S. Reiserer, Hunter Tidwell, Philip C. Samson, John P. Wikswo
  • Patent number: 10465673
    Abstract: The invention relates to a peristaltic pump (1) comprising a saddle and a rotor (3) rotatable therein, between which a hose (4) is arranged. The rotor (3) carries hose compression means (6), which sweep over the hose (4) with the rotation of the rotor (3) and thus convey a conveying fluid. When the hose compression means (6) emerge from the hose (4), this results in pulsation effects. According to the invention, these pulsation effects are suppressed in that an inner saddle face (5), on which the hose (4) is positioned, is suitably shaped. In addition, the pulsation effects may be reduced or prevented by controlled adaptation of the rotor rotational speed, by suitable selection of a conveying end position during metering of the pumping medium, or by establishing particular invariable conveying end positions. The use of a peristaltic pump (1) of this type for metering is further proposed.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: November 5, 2019
    Assignee: BAUSCH + STRÖBEL MASCHINENFABRIK ILSHOFEN GMBH + CO. KG
    Inventors: Simon Ackermann, Harald Bauer
  • Patent number: 10309388
    Abstract: A method and apparatus for pumping fluid through tubing are provided. The method includes orbiting first rollers around the periphery of a first disk at a first tangential speed in a first angular sector and a slower, second tangential speed in a second angular sector, orbiting second rollers around the periphery of a second disk at the second tangential speed, and increasing the pressure of fluid in tubing between one first roller and one second roller by causing the one first roller to fully compress the tubing at the first tangential speed and simultaneously causing the one second roller to fully compress the tubing at the second tangential speed. The apparatus includes a first disk with a recess in its periphery, the first angular sector with a nominal first radius, and a second angular sector with a nominal second radius; and a second disk with the nominal first radius and a recess in its periphery.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: June 4, 2019
    Assignee: Bio-Rad Laboratories, Inc.
    Inventors: Nathan Michael Gaskill-Fox, Daniel Nelson Fox
  • Patent number: 10119622
    Abstract: A rotary planar peristaltic micropump (RPPM) includes an actuator having a shaft engaged with a motor such that activation of the motor causes the shaft to rotate, and a bearing assembly engaged with the shaft. The bearing assembly has a bearing cage defining a plurality of spaced-apart openings thereon, and a plurality of rolling-members accommodated in the plurality of spaced-apart openings of the bearing cage, such that when the shaft rotates, the plurality of rolling-members of the bearing assembly rolls along a circular path. The RPPM also includes a fluidic path in fluidic communication with first and second ports. The fluidic path is positioned under the actuator and coincident with the circular path, such that when the shaft of the actuator rotates, the plurality of rolling-members of the bearing assembly rolls along the fluidic path to cause a fluid to transfer between the first and second ports.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: November 6, 2018
    Assignee: VANDERBILT UNIVERSITY
    Inventors: Frank E. Block, III, Philip C. Samson, Erik M. Werner, Dmitry A. Markov, Ronald S. Reiserer, Jennifer R. Mckenzie, David E. Cliffel, William J. Matloff, Frank E. Block, Jr., Joseph R. Scherrer, W. Hunter Tidwell, John P. Wikswo
  • Patent number: 9662621
    Abstract: A drug reconstitution device comprising a disposable liquid transfer unit (18) and a reusable control and drive unit (16) removably connectable to the liquid transfer unit, the liquid transfer unit including a housing (26), a docking interface (30) configured for coupling at least one of the first and second constituent containers (2, 4) to the housing (10), and a pump engine (28) and fluid flow system (36) configured for transferring liquid from the first constituent container (2) to the second constituent container (4). The control and drive unit comprises a pump drive (22) configured to drive the pump engine during a liquid transfer action, the pump drive comprising a transmission output coupling (34) removably engaged with a transmission input coupling (50) of the pump engine (28) when the liquid transfer unit and control and drive unit are connected.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: May 30, 2017
    Assignee: SENSILE PAT AG
    Inventors: Uwe Beyer, Derek Brandt, Thomas Gerber, Franck Robin
  • Patent number: 9140251
    Abstract: A peristaltic pump for use with tubing. The pump includes a raceway and a rotatably mounted rotor that form a passageway therebetween for the tubing. A plurality of roller assemblies is pivotably and eccentrically mounted to the rotor. Each roller assembly has a length, and includes a roller having an outer surface disposed to selectively roll along said tubing when received in the passageway. At least one compliance mechanism is coupled to and contained substantially within the length of each roller assembly. The compliance mechanism has first and second ends coupled to the rotor and the roller assembly, respectively. The compliance mechanism is adapted and disposed to bias the associated roller assembly outward relative to the rotor, such that a force applied to the roller assembly pivoting the roller assembly inward against the force of the compliance mechanism.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: September 22, 2015
    Assignee: Fresenius Medical Care Holdings, Inc.
    Inventor: Michael J. Beiriger
  • Patent number: 8920144
    Abstract: A peristaltic pump includes a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid. A plurality of fingers are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations. A cyclical pump mechanism is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle. A motor is coupled to drive the pump mechanism. A controller is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: December 30, 2014
    Assignee: Q-Core Medical Ltd.
    Inventors: Shachar Rotem, Meged Ofer
  • Publication number: 20140356206
    Abstract: A roller assembly comprises a central section with a hub; a plurality of arms coupled to the central section such that each arm is capable of moving independently with respect to the central section; a plurality of spring pins, one spring pin associated with each arm; a plurality of retaining pins, one retaining pin associated with each arm; and a plurality of rollers, one roller coupled to each arm.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 4, 2014
    Inventors: Gary P. Sorensen, Gregory S. Layser, Mel Matthew Oliveira, Behzad Hashemi
  • Publication number: 20140356205
    Abstract: A roller assembly comprises a central section with a hub, the central section having a plurality of pivots located around the central section; a plurality of arms, each arm having a roller end and a pivot end, the pivot ends coupled to the central section at the plurality of pivots such that each arm is capable of pivoting independently with respect to the central section, the roller ends and pivot ends of each arm located a distance of at least one roller width away from each other; a plurality of rollers, one roller coupled to each of the roller ends of the plurality of arms; wherein the plurality of rollers and arms are located around the central section such that the pivot is located a distance away from the roller.
    Type: Application
    Filed: May 30, 2013
    Publication date: December 4, 2014
    Inventor: Vincent A. Baxter
  • Patent number: 8858202
    Abstract: The rotary diaphragm pump has a flexible, resilient diaphragm band surrounding an elliptical frame within a case having four chambers surrounding an elliptical core. An articulating mechanism has a plurality of wheels traveling along the elliptical edges of the frame. The mechanism extends and retracts as the wheels move from maximum extension along the major axis of their elliptical tracks to minimum extension at the minor axis of their tracks. This mechanism drives a pair of actuator rollers along the inner surface of the diaphragm, periodically forcing the diaphragm into the surrounding chambers to produce the pumping action. Each chamber has an inlet port and an outlet port. The various ports may be interconnected to provide one or more multi-stage pumps in combination with one or more single-stage pumps, as desired. Two or more pumps may be joined in tandem to provide greater capacity from a single drive shaft.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: October 14, 2014
    Assignee: Kuwait University
    Inventor: Osama M. Al-Hawaj
  • Patent number: 8858185
    Abstract: An infusion system and method for controlling the fluid flow from a pump includes a pump system that has a controller that utilizes an algorithm to control the flow rate of fluid through tubing. A plurality of electrodes operatively contacts an electrically conductive portion of the tubing that is also acted upon by the pump system. The electrodes monitor electrical properties of the tubing and provide an electric signal indicative thereof to the controller, which varies the flow rate of the fluid through the tubing as a result of the electric signal.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: October 14, 2014
    Assignee: Hospira, Inc.
    Inventors: Thomas D. Johnson, Ryan R. Brumund, James A. McNeely
  • Publication number: 20140212314
    Abstract: Linear peristaltic pump for pumping a fluid through a flexible tube (13) comprises a rotatable central member (34) with a plurality of radially disposed planetary gears (51-53). An offset roller (61-63) is disposed on each of the planetary gears (51-53). The flexible tube (13) is inserted between a generally flat compression surface (40) and at least one of the plurality of rollers (61-63). Rotation of the central member (34) enables the plurality of rollers (61-63) to serially collapse the flexible tube (13) and to move in a substantially linear motion along the generally flat compression surface (40) for pumping the fluid through the flexible tube (13).
    Type: Application
    Filed: August 3, 2012
    Publication date: July 31, 2014
    Inventor: Rick Baron
  • Patent number: 8790096
    Abstract: In various embodiments, a surgical cassette, configured to engage peristaltic pump rollers, may include two or more pump segments between a sheet and a substrate coupled to the sheet. The two or more pump segments on the cassette may produce additional flow (e.g., approximately twice the flow for two segments as opposed to one) than if the cassette had only one pump segment engaging the roller. Further, in some embodiments, the two or more pump segments and rollers on the roller head may be configured to provide a flow profile in which a peak of a pulse from a first pump segment is at least partially out of phase with a peak of a pulse from the second pump segment. The combined resultant flow may then have a flow profile with pulsation amplitudes that are smaller than the individual pump segment pulsation amplitudes.
    Type: Grant
    Filed: April 7, 2010
    Date of Patent: July 29, 2014
    Assignee: Alcon Research, Ltd.
    Inventor: Gary P. Sorensen
  • Publication number: 20130343938
    Abstract: A pump for pumping fluid using peristaltic compression. The pump includes a rotor and a roller. The rotor includes a first cam that extends along a circumferential direction relative to the rotor. The first cam has first and second dwells. The roller is movable relative to the rotor between the first dwell and the second dwell of the first cam as the rotor rotates in a first direction and a second direction. The rotor includes a second cam extending radially from its shaft for engaging the roller. Contact between the second cam and the roller increases frictional resistance between the rotor and the roller as the roller translates between the first and second dwells of the first cam such that the roller transitions between the first and second dwells without slipping.
    Type: Application
    Filed: June 22, 2012
    Publication date: December 26, 2013
    Inventors: GREGORY LEON HUTCHISON, Edmund Hulin James, III, Randal Scott Williamson, Alexander J. Headley
  • Patent number: 8529229
    Abstract: A tube pump reduced of the burden against pump driving caused by dragging of a tube by a pressurizing roller. Specifically, guide members are disposed in the respective introduction portions at between the guides. Namely, the guide members are arranged nearby the extensions of the circumference of the arcuate guides and radially with respect to the center of the circumference. Due to this, the pump tube, the roller is to drag, is sustained by the guide member, to prevent the tube from increasing its deformation due to dragging. Thus, the tube can be prevented from being dragged in a manner forming a resistance to the roller. As a result, the pump motor, etc. can be prevented from being burdened with an increasing load.
    Type: Grant
    Filed: August 16, 2007
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yasuyuki Asai, Masaaki Matsuura
  • Patent number: 8430643
    Abstract: A pump for moving a fluid through a fluidics system includes a surface and channel disposed along at least a portion of the surface. The pump also includes a driving mechanism having a rotatable shaft and a plurality of haptics operably coupled to the shaft. A closed portion is formed in the channel as the channel is compressed between the surface and at least one of the haptics, the closed portion having a thickness between the surface and the haptic. The pump additionally has a circular path and a shaft path. The surface has a radius of curvature in the vicinity of the closed portion that is greater than the sum of a radius of the circular path and the thickness of the closed portion.
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: April 30, 2013
    Assignee: Abbott Medical Optics Inc.
    Inventor: Craig Edwards
  • Patent number: 8371832
    Abstract: A peristaltic pump includes a conduit having a first end for receiving a fluid from a reservoir and a second end for delivering the fluid. A plurality of fingers are disposed at respective locations along a segment of the conduit and are configured to alternately compress and release the conduit at the locations. A cyclical pump mechanism is coupled to move the fingers between respective compressed and released positions in a spatio-temporal pattern so as to drive a predetermined quantity of the fluid through the segment of the conduit in each pump cycle. A motor is coupled to drive the pump mechanism. A controller is coupled to activate and deactivate the motor in alternation during each pump cycle with a duty cycle that varies within the pump cycle.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: February 12, 2013
    Assignee: Q-Core Medical Ltd.
    Inventors: Shachar Rotem, Meged Offer
  • Patent number: 8360758
    Abstract: A peristaltic pump, for propelling liquid through a flexible pump tube, includes an outer casing having a guiding channel wherein an operating portion of the pump tube extends along the guiding channel. The peristaltic pump further includes at least two pressuring rollers supported at the outer casing in a radially movable manner which can move outwardly to press against the operating portion of the pump tube. A center driving mechanism is supported at a center portion of the outer casing to radially push the pressure rollers and to drive the pressuring rollers to concurrently rotate such that the pressuring rollers roll against the operating portion of the pump tube for continuously propelling the fluid in the pump tube in the direction of rotation.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: January 29, 2013
    Inventor: Zaijun Cheng
  • Patent number: 8308456
    Abstract: Rotary axial peristaltic pumps, related methods and components. The rotary axial peristaltic pump generally comprises a platen having a platen surface, a tube positioned adjacent to the platen surface, cam that rotates about a rotational axis and has a cam surface that is spaced apart from the platen surface and a plurality of tube compressing fingers. The fingers move axially back and forth in sequence to sequentially compress segments or regions of the tube against the platen surface, thereby causing peristaltic movement of fluid through the tube. The fingers move back and forth on axes that are substantially parallel to the axis about which the cam rotates.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: November 13, 2012
    Assignees: Baxter International Inc., Baxter Healthcare S.A.
    Inventor: Ahmad-Maher Moubayed
  • Patent number: 8297954
    Abstract: This disclosure concerns rotary axial peristaltic pumps, related methods and components. The rotary axial peristaltic pump generally includes a platen having a platen surface, a tube positioned adjacent to the platen surface, a cam that rotates about a rotational axis and a cam surface that is spaced apart from the platen surface and a plurality of tube compressing fingers. The fingers move axially back and forth in sequence to sequentially compress segments or regions of the tube against the platen surface, thereby causing peristaltic movement of fluid through the tube. The fingers move back and forth on axes that are substantially parallel to the axis about which the cam rotates.
    Type: Grant
    Filed: April 15, 2009
    Date of Patent: October 30, 2012
    Assignees: Baxter International Inc., Baxter Healthcare S.A.
    Inventor: Ahmad-Maher Moubayed
  • Patent number: 8262375
    Abstract: A tube pump rotor including a rotor element, a plurality of first swing portions supported pivotally at their base end portions by the rotor element, second arm-shaped swing portions supported pivotally at their base end portions individually by the first swing portions, rollers supported rotatably by the individual free ends of the second swing portions, and buffer members made to confront the side faces of the second swing portions so that the rollers may be individually directed radially outward of the rotor.
    Type: Grant
    Filed: February 18, 2008
    Date of Patent: September 11, 2012
    Assignee: JMS Co., Ltd.
    Inventors: Seiji Kojima, Kou Sekiya, Junya Fujii, Shogo Kamito
  • Publication number: 20120175292
    Abstract: A peristaltic pump for use with tubing. The pump includes a raceway and a rotatably mounted rotor that form a passageway therebetween for the tubing. A plurality of roller assemblies is pivotably and eccentrically mounted to the rotor. Each roller assembly has a length, and includes a roller having an outer surface disposed to selectively roll along said tubing when received in the passageway. At least one compliance mechanism is coupled to and contained substantially within the length of each roller assembly. The compliance mechanism has first and second ends coupled to the rotor and the roller assembly, respectively. The compliance mechanism is adapted and disposed to bias the associated roller assembly outward relative to the rotor, such that a force applied to the roller assembly pivoting the roller assembly inward against the force of the compliance mechanism.
    Type: Application
    Filed: January 10, 2011
    Publication date: July 12, 2012
    Applicant: FRESENIUS MEDICAL CARE HOLDINGS, INC.
    Inventor: Michael J. Beiriger
  • Patent number: 8197236
    Abstract: A pump rotor for a roller pump, is disclosed. The rotor comprises: a first roller support comprising a first roller; a second roller support comprising a second roller; an element in the center connected to the first and second roller supports, wherein the first and second roller supports may move angularly with respect to the center element causing distance between the first and second rollers to be varied; first and second positioning elements that connect the first and second roller supports, respectively, to the center element; and first and second spring biased components surrounding first and second positioning elements, respectively, to allow the first and second roller supports to move to allow for automatic adjustment of the rotor.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: June 12, 2012
    Assignee: Medtronic, Inc.
    Inventor: Kevin D. McIntosh
  • Publication number: 20120100023
    Abstract: A tube pump capable that prevents and minimizes torque variation in a drive motor regardless of the rotation direction of a rotor unit includes a casing in which a liquid-flowing tube is arranged; a drive motor provided with a driving shaft rotatable in forward and reverse directions; a rotor body; roller holders supported on the rotor body to swing with respect to the rotor body; pressing rollers rotatably supported on the roller holders to press the tube against an inner circumferential wall surface of the casing; and biasing units biasing the roller holders, when swung, to be returned to a pre-swing position. The roller holders are configured to swing with respect to the rotor body in a direction opposite to a rotation direction of the rotor body.
    Type: Application
    Filed: October 21, 2011
    Publication date: April 26, 2012
    Applicant: NIDEC SERVO CORPORATION
    Inventors: Akira HANAZUKA, Yoshihisa KAGAWA
  • Patent number: 8162633
    Abstract: A pump for moving a fluid through a fluidics system includes a surface and channel disposed along at least a portion of the surface. The pump also includes a driving mechanism having a rotatable shaft and a plurality of haptics operably coupled to the shaft. A closed portion is formed in the channel as the channel is compressed between the surface and at least one of the haptics, the closed portion having a thickness between the surface the haptic. The pump additionally has a circular path and a shaft path. The haptics are completely disposed inside the circular path and traversing the circular path during operation of the driving mechanism. The shaft path is traversed by shaft during operation of the driving mechanism, such at least one of the haptics is always in contact with the channel. The surface has a radius of curvature in the vicinity of the closed potion that is greater than the sum of a radius of the circular path and the thickness of the closed portion.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: April 24, 2012
    Assignee: Abbott Medical Optics Inc.
    Inventor: Craig Edwards
  • Patent number: 7762795
    Abstract: Rotary axial peristaltic pumps, related methods and components. The rotary axial peristaltic pump generally comprises a platen having a platen surface, a tube positioned adjacent to the platen surface, cam that rotates about a rotational axis and has a cam surface that is spaced apart from the platen surface and a plurality of tube compressing fingers. The fingers move axially back and forth in sequence to sequentially compress segments or regions of the tube against the platen surface, thereby causing peristaltic movement of fluid through the tube. The fingers move back and forth on axes that are substantially parallel to the axis about which the cam rotates.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: July 27, 2010
    Assignees: Baxter International Inc., Baxter Healthcare S.A.
    Inventor: Ahmad-Maher Moubayed
  • Publication number: 20100047100
    Abstract: A tube pump rotor including a rotor element, a plurality of first swing portions supported pivotally at their base end portions by the rotor element, second arm-shaped swing portions supported pivotally at their base end portions individually by the first swing portions, rollers supported rotatably by the individual free ends of the second swing portions, and buffer members made to confront the side faces of the second swing portions so that the rollers may be individually directed radially outward of the rotor.
    Type: Application
    Filed: February 18, 2008
    Publication date: February 25, 2010
    Applicant: JMS CO., LTD.
    Inventors: Seiji Kojima, Kou Sekiya, Junya Fujii, Shogo Kamito
  • Patent number: 7625189
    Abstract: A peristaltic pump, for propelling liquid through a flexible pump tube, includes an outer casing having a guiding channel wherein an operating portion of the pump tube extends along the guiding channel. The peristaltic pump further includes at least two pressuring rollers supported at the outer casing in a radially movable manner which can move outwardly to press against the operating portion of the pump tube. A center driving mechanism is supported at a center portion of the outer casing to radially push the pressure rollers and to drive the pressuring rollers to concurrently rotate such that the pressuring rollers roll against the operating portion of the pump tube for continuously propelling the fluid in the pump tube in the direction of rotation.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: December 1, 2009
    Inventor: Zaijun Cheng
  • Publication number: 20090269228
    Abstract: A pump rotor for a roller pump, is disclosed. The rotor comprises: a first roller support comprising a first roller; a second roller support comprising a second roller; an element in the center connected to the first and second roller supports, wherein the first and second roller supports may move angularly with respect to the center element causing distance between the first and second rollers to be varied; first and second positioning elements that connect the first and second roller supports, respectively, to the center element; and first and second spring biased components surrounding first and second positioning elements, respectively, to allow the first and second roller supports to move to allow for automatic adjustment of the rotor.
    Type: Application
    Filed: December 5, 2008
    Publication date: October 29, 2009
    Inventor: Kevin D. McIntosh
  • Patent number: 7591639
    Abstract: A peristaltic pump includes a plurality of occlusion surfaces and a plurality of rotors. The plurality of occlusion surfaces include a first occlusion surface and a second occlusion surface. The plurality of rotors includes a first rotor configured to be rotated about an axis and carrying a first set of occluding surfaces and a second rotor configured to be rotated about the axis and carrying a second set of occluding surfaces. The first set of occluding surfaces and the second set of occluding surfaces have a staggered pitch.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: September 22, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Blair M. Kent
  • Patent number: 7556481
    Abstract: Rotary axial peristaltic pumps, related methods and components. The rotary axial peristaltic pump generally comprises a platen having a platen surface, a tube positioned adjacent to the platen surface, cam that rotates about a rotational axis and has a cam surface that is spaced apart from the platen surface and a plurality of tube compressing fingers. The fingers move axially back and forth in sequence to sequentially compress segments or regions of the tube against the platen surface, thereby causing peristaltic movement of fluid through the tube. The fingers move back and forth on axes that are substantially parallel to the axis about which the cam rotates.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: July 7, 2009
    Assignees: Baxter International Inc., Baxter Healthcare S.A.
    Inventor: Ahmad-Maher Moubayed
  • Patent number: 7434312
    Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.
    Type: Grant
    Filed: April 16, 2004
    Date of Patent: October 14, 2008
    Assignee: Medtronic, Inc.
    Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Mandred K. Luedi
  • Patent number: 7168930
    Abstract: A peristaltic pump 10 for use in ophthalmic surgery includes a housing 12, a pump head 14 having plurality of rollers 16, a backing plate 18 attached to the housing 12, and a length of surgical tubing 50. The rollers 16 and backing plate 18 cooperate to pinch the length of surgical tubing 50 to peristaltically pump fluids from a surgical site to a collection bag 64. At least one of the pump head 14 and the backing plate 18 is moveable, during operation of the pump 10, from a tubing pinched position to a tubing vent position. This movement allows the tubing 50 to be vented by removing the pinched closure of the tubing 50.
    Type: Grant
    Filed: September 29, 2003
    Date of Patent: January 30, 2007
    Assignee: Bausch & Lomb Incorporated
    Inventors: Laurence J. Cull, James T. Perkins, Robert Fries
  • Patent number: 7150607
    Abstract: A displacement pump comprising a pump assembly and a cassette assembly. The pump assembly includes upper and lower housing portions that define a cavity, an arm disposed in the cavity, a roller attached to the distal end of the arm, and a motor attached to the proximal end of the arm for rotating the arm. The cassette assembly is removably disposed in the cavity and comprises upper and lower cassette housing portions that form an annular compression surface with a channel therein. A hollow compression tube having a flange extending along a length thereof is secured to the compression surface by the flange being engaged with the channel. As the motor rotates the roller arm, the roller presses the compression tube against the compression surface to create a moving occlusion of the compression tube for pushing fluid through the compression tube.
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: December 19, 2006
    Assignee: International Remote Imaging Systems, Inc.
    Inventors: John P. Pelmulder, Conrad O. Diaz
  • Patent number: 7037092
    Abstract: A roller pump comprises a pump housing having a cylindrical inner surface, a rotor fixed to a drive shaft placed at the central portion of the pump housing, rollers provided around the rotor and a driver for driving the drive shaft through a reduction gear. The rollers press an elastic tube installed between the rollers and the inner surface of the pump housing to transfer a liquid in the elastic tube by rotation of the rotor. The pump housing and the reduction gear are integrated into one body and an output shaft of the reduction gear is fixed to the drive shaft of the rotor. A stepping motor is used as the driver. A part of the inner surface of the pump housing is composed of a semicircle, another part of the inner surface is composed of a partial circle of which center is shifted from the center of the semicircle.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: May 2, 2006
    Assignee: Japan Servo Co., Ltd.
    Inventors: Yoshihisa Kagawa, Kazuhide Yamazaki, Seiji Kojima
  • Patent number: 7011387
    Abstract: An ink jet recording apparatus includes a tube pump for generating negative pressure in a tube, the tube pump being provided with a tube disposed along an arcuate guide portion, a pressing roller for squeezing the tube, a rotary member to which the pressing roller is rotatably journalled, and a supporting member to which the rotary member is rotatably journalled. The tube, the pressing roller, the rotary member and the rotary member supporting member are assembled to thereby form a pump unit, and are separable from the guide portion in the state of the pump unit. Thereby, the incorporation of the tube becomes easy, and the erroneous incorporation of the tube in its buckled state or its twisted state can be eliminated easily.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: March 14, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Saito, Yasuo Miyauchi, Kenji Shigeno
  • Patent number: 6872059
    Abstract: A liquid discharger 1A has a base 2A where a resilient tube 100 is disposed in a tube guide groove 211A. A retainer 4A is rotatably provided at the base 2A, with a plurality of balls 5 being mounted at the retainer 4A so that the balls can roll. The cross sectional shape of a surface 211 defining the tube guide groove 211A that contacts the tube 100 has an arc shape formed concentrically with the balls 5. The balls 5, which are held by the retainer 4A, roll on the tube 100 while pressing and squashing a portion of the tube 100 as a rotor 3A rotates in order to discharge liquid inside the tube 100.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: March 29, 2005
    Assignee: Seiko Epson Corporation
    Inventors: Osamu Takahashi, Masatoshi Moteki
  • Publication number: 20040202561
    Abstract: An irrigation surgical tool system comprises a motorized handpiece, a tool for insertion in the handpiece, a console including a mounting plate and peristaltic pump rotor and a tube set including a cassette installable on the console for peristaltic pumping of irrigation liquid to the tool. Passages in the tool allow irrigation liquid flow, between a fixed outer tube and rotating inner tube of the tool, to a surgical site, through windows in the tool inner and outer tubes. Application of suction to the tool enables withdrawal through the inner tube of irrigation and surgical debris from the surgical site.
    Type: Application
    Filed: April 9, 2004
    Publication date: October 14, 2004
    Applicant: Stryker Instruments
    Inventors: David Hershberger, Chamara L. Gamhewage
  • Publication number: 20040199118
    Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.
    Type: Application
    Filed: April 16, 2004
    Publication date: October 7, 2004
    Applicant: Medtronic, Inc.
    Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Manfred K. Luedi
  • Patent number: 6743204
    Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller and a hub. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A retracting roller is operably connected to the hub and/or one or more adjacent rollers to permit retraction of the roller during installation of the pump tube between the roller and the race.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: June 1, 2004
    Assignee: Medtronic, Inc.
    Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, Manfred Luedi
  • Patent number: 6736617
    Abstract: A roller pump includes a stator, a rotor assembly including a rotor hub, a first roller slide and a second roller slide slidingly disposed within the rotor hub, with each of the roller slides supporting a roller. At least one adjustable bushing is mounted within at least one of the roller slides. The roller slide includes a recess and the at least one adjustable bushing is at least partially disposed within the recess. The at least one adjustable bushing includes a bushing member and a spring member, the bushing member and the spring member being disposed within the recess in the roller slide.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: May 18, 2004
    Assignee: Terumo Cardiovascular Systems Corporation
    Inventor: Michael K. Domroese
  • Patent number: 6733476
    Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the pump tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. At least two biasing members are operably connected to the roller to bias the roller against the tube, the two biasing members forming an angle.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: May 11, 2004
    Assignee: Medtronic, Inc.
    Inventors: Steven R. Christenson, James Randall, Micheal Thomas Hegland, James M. Haase, Mark S. Lent, William H. Monsen
  • Patent number: 6733255
    Abstract: A groove wall of a roller support groove opened to both end faces of a pump wheel comprises such a cam face wherein a roller rotates and rolls and is displaced from release operation position a to pump operation position b with rotation of the pump wheel in a pump operation direction from a release operation state and wherein the roller remains immobile and is displaced from the pump operation position b to the release operation position a with rotation of the pump wheel in a release operation direction from a pump operation state.
    Type: Grant
    Filed: August 19, 2002
    Date of Patent: May 11, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Mitsugu Ota, Takashi Koase
  • Patent number: 6645176
    Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A drive assembly drives the roller assembly relative to the tube along the path so as to move the liquid through the tube. A biasing member is operably connected to the at least one roller to bias the at least one roller against the tube.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: November 11, 2003
    Assignee: Medtronic, Inc.
    Inventors: Steven R. Christenson, Reginald D. Robinson, Kenneth T. Heruth, James M. Haase, James Randall, Christian Pèclat, Manfred K. Lüedi
  • Patent number: 6641249
    Abstract: A recoverying unit for maintenance and recovery of ink ejection performance of an ink ejecting device includes an elastic tube; a guide member for supporting the tube; a roller for pressing the tube; and a roller holding member, wherein the roller holding member is provided with a guide groove which connects a first position in which the roller presses the tube for substantially hermetically closing the tube, a second position in which the roller presses the tube with a greater pressing degree, and a third position in which the tube is opened, the guide groove is effective to guide movement of the roller between the first position and the third position.
    Type: Grant
    Filed: July 19, 2001
    Date of Patent: November 4, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yasuo Miyauchi
  • Patent number: 6626867
    Abstract: An implantable drug infusion device includes a pump tube for holding a liquid to be pumped. A race is configured to support the tube. A roller assembly is configured to compress the tube against the race at one or more points along the path, and the roller assembly includes at least one roller. A tube guide is operably connected to the roller assembly to align the pump tube with respect to a corresponding roller.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: September 30, 2003
    Assignee: Medtronic, Inc.
    Inventors: Steven R. Christenson, Reginald D. Robinson, James M. Haase, Manfred K. Lüedi
  • Publication number: 20030156957
    Abstract: A roller pump including a stator, a rotor assembly including a rotor hub, a first roller slide and a second roller slide slidingly disposed within the rotor hub, with each of the roller slides supporting a roller. At least one adjustable bushing is mounted within at least one of the roller slides. The roller slide includes a recess and the at least one adjustable bushing is at least partially disposed within the recess. The at least one adjustable bushing includes a bushing member and a spring member, the bushing member and the spring member being disposed within the recess in the roller slide.
    Type: Application
    Filed: February 20, 2002
    Publication date: August 21, 2003
    Inventor: Michael K. Domroese
  • Patent number: 6599106
    Abstract: In a tube pump, a rotor is fixed to a drive shaft so as to rotate therewith. A tube pressing member is swingable in an axial direction of the drive shaft. A swinging member swings the tube pressing member in accordance with the rotation of the rotor. An upper outer face of a tube is fixed to a lower portion of the tube pressing member. A lower outer face of the tube is fixed to a fixing member. The tube is forcibly pressed and expanded in accordance with the swing motion of the tube pressing member, while the pressed/expanded part is shifted in an extending direction.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: July 29, 2003
    Assignee: Seiko Epson Corporation
    Inventors: Shuhei Harada, Atsushi Kobayashi
  • Patent number: 6551080
    Abstract: A peristaltic fluid pump having a suction side and a pumping side. The pump includes a pump housing having a mainly arcuate support surface, a flexible tube extending along this surface, a rotor having two opposite rollers for during operation rolling over the flexible tube along an entrance section where the tube is successively compressed, a pumping section extending across an angle of an arc of less than 180°, and an exit section where the compression successively ends, and a motor for during operation making the rotor rotate. The arcuate support surface is shaped in such a way that the rearmost and foremost rollers do not operate in synchronous phase opposition during their passage of the entrance and exit section. The peristaltic fluid pump is capable of pumping a fluid with less pressure difference and compressive pulsations in the fluid than previously known, making it especially suitable for pumping a patient's blood through a dialyzer.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: April 22, 2003
    Inventors: John G. Andersen, Per Baron Brekke
  • Patent number: 6494693
    Abstract: An improved peristaltic pump using a pumptube comprising a single tube of a relatively rigid and hard fluoroplastic material, preferably relatively rigid and hard polytetrafluoroethylene (PTFE), and a roller strap located between the pressure rollers of the peristaltic pump and the pumptube, is provided. The roller strap prevents direct contact between the pressure rollers of the peristaltic pump and the pumping section of the pumptube. The pumping section of the pumptube is formed or shaped into a flattened, oval-like shape which approximately conforms to the pumptube passageway in the peristaltic pump. The pressure rollers contact the roller strap and then compress the flattened side of the pumptube and, thereby, effecting transport or pumping of the fluid. The use of the strap prevents excessive tube expansion at the output back-pressure, thereby increasing the lifetime of the pumptube.
    Type: Grant
    Filed: October 23, 2000
    Date of Patent: December 17, 2002
    Assignee: Cole-Parmer Instrument Company
    Inventor: Bengt Sundén