Conduit Deforming Clamp Patents (Class 604/250)
  • Patent number: 5238217
    Abstract: A hose clamp (50) for a hose (18), inside which a different pressure prevails from that of its environment, and having two arms (28, 30) between which said hose (18) may be squeezed with different forces and thus the hose cross-section may be closed, is characterized in that the two arms (28, 30) are mutually movable transversely to the longitudinal axis of the hose (18), a bellows-like body (38) is arranged between the two arms (28, 30) in such a way that, by the expansion and compression of said body (38), the arms (28, 30) are movable in relation to each other and thus the hose (18) may be compressed to differing degrees, and the inside of the bellows-like body (38) may be connected to the hose (18) via a subsidiary line (48).
    Type: Grant
    Filed: January 29, 1992
    Date of Patent: August 24, 1993
    Assignee: MEDINORM Aktiengesellschaft medizintechnische Produkte
    Inventor: Helmut Fell
  • Patent number: 5234412
    Abstract: A device for infusion or transfusion can be connected to a flexible tube line (16). The regulating arrangement (8, 9, 10, 12) for regulating the flow rate of the fluid through the flexible tube line (16) is a rigid structural member of the intravenous drip chamber (1) containing the infusion or transfusion liquid. The flow rate is regulated by means of a regulating nut (12) which effectively connects the regulating knob (10) with a flexible tube line (16). The structural member has a tubular connection piece (2) provided with a closed end (3) and having lateral perforations (4). The tubular connection piece (2) is coaxially spaced by a surrounding tubular threaded pipe (6) divided into segments (8, 9) separated by dividing points (7). The lateral perforations (4) open into downwardly directed grooves (5) which establish a flow path.
    Type: Grant
    Filed: September 16, 1991
    Date of Patent: August 10, 1993
    Inventor: Hans-Jurgen Forberg
  • Patent number: 5230704
    Abstract: A suction/irrigator surgical instrument comprises a replaceable cartridge containing the entirety of the fluid flow path for the instrument and a reusable flow-control member having trigger-actuated levers for selectively opening and occluding a portion of the fluid flow path when the two members are affixed to one another, in piggy-back fashion, to form a pistol-grip for the instrument.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: July 27, 1993
    Assignee: Biomedical Dynamics Corporation
    Inventors: John R. Moberg, Joseph A. Marino, Matthew E. Bellin
  • Patent number: 5221268
    Abstract: A multiple dose infusion controller for controlling the delivery of multiple dosages of an intravenous fluid from a source to a site comprises a compact, portable housing having a slot for removably receiving a segment of a disposable tubing connected to an IV source for transporting an IV fluid to a site, a valve member mounted in the housing for periodically engaging and compressing the tubing for closing the tubing for preventing flow of fluid therethrough, a motor in the housing for driving the valve member upon energization to selected open and closed positions, and controls in the housing for periodically energizing the motor for selectively controlling the flow of the fluid through the tubing in accordance with predetermined delivery times and duration parameters.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: June 22, 1993
    Assignee: Block Medical, Inc.
    Inventors: Russell C. Barton, Maresala Milo, Charles N. Bunn
  • Patent number: 5219327
    Abstract: A transfusion pump 10 is that 1 when the door 13 is opened to set the tube, the clamping member 53 is retained in engagement with the first unclamp retaining portion 61 by manual operation so as to be set at the unclamp position, 2 when the door 13 is closed after the tube has been set, the clamping member 53 is released from its engagement with the first unclamp retaining portion 61 by the first unclamp releasing portion 63, and retained in engagement with the second unclamp retaining portion 64 so as to be set at the unclamp position, and 3 when the door 13 is opened after its closing, the clamping member 53 loses its engagement with the second unclamp retaining portion 64 so as to be set at the clamp position.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: June 15, 1993
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Shigeru Okada
  • Patent number: 5211626
    Abstract: Medical infusion apparatus comprises a housing in which a standard flexible liquid reservoir is disposed. A constant-force spring applies pressure to the reservoir to force liquid out of the reservoir and along a conduit to a patient. The spring is energized by the opening of a lid of the housing which permits replacement of the reservoir.The liquid flowing out of the reservoir passes through a molded conduit part which is configured so that it is positioned at a predetermined location with respect to a flow monitor. The flow monitor injects a pulse of heat, and detects the rate at which the heat pulse travels along the conduit. A microprocessor uses the sensed flow rate to control a stepper motor which regulates fluid flow by squeezing the conduit via a spring-biased member. The apparatus has active and standby modes in which the monitor is operated respectively more and less frequently.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: May 18, 1993
    Assignee: Product Innovation Holdings Ltd.
    Inventors: Peter Frank, Terence G. Giles
  • Patent number: 5207642
    Abstract: An improved multiple fluid delivery system usable for the delivery of intravenous fluids to a patient from a plurality of fluid sources includes flexible tubing members for coupling the sources to a fluid junction member. The fluid junction member, wherein little or no interfluid mixing occurs, is coupled by an output conduit to a controllable pump. Output from the pump, via a further fluid flow conduit, can be coupled to the patient's catheter. The system can multiplex a plurality of different fluids. Spaced apart sequences of fluid quanta are injected into the output conduit from the fluid flow junction. The fluids are either mixed, or not, in the output conduit as desired. Operator interaction and control of the system can occur either through a display screen or by means of a bar code sensor. Hard copy records can be provided of fluid flow delivery schedules or other related information.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: May 4, 1993
    Assignee: Baxter International Inc.
    Inventors: Fredric I. Orkin, Theodore Liber, Charles R. Smith, Kimball J. Knowlton, Albin Huntley
  • Patent number: 5201714
    Abstract: A cannula is provided for laparoscopic surgery wherein the cannula comprises a housing and elongated tube with a passageway formed within the housing so that laparoscopic instruments may be passed through the housing and the elongated hollow tube into the abdominal cavity of a patient. A pair of rollers are mounted within the housing, the rollers being spring-urged together to close the passageway through the housing when an instrument is withdrawn. A slidable plate having apertures of different sizes are mounted in the housing with the apertures provided with slitted seals therein to close the passageway through the housing. The varying sized apertures in the slidable plate permit laparoscopic instruments of varying diameters to be used and to maintain an effective seal around the instrument. In another embodiment of the cannula a valve is provided which is closed when the rollers within the housing are in engagement with each other.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: April 13, 1993
    Assignee: Conmed Corporation
    Inventors: John S. Gentelia, Frank Williams, William Wheatley, Sharyn Longo, Deborah Forbey
  • Patent number: 5190079
    Abstract: A flow control device for controlling the rate of flow liquid wherein a liquid supply tube is inserted in a liquid supply tube insertion channel extending in the longitudinal direction of the liquid supply tube. A roller is provided for squeezing the liquid supply tube against the bottom of the tube insertion channel. Ridges are provided for squeezing the opposite side edges of the liquid supply tube to a greater degree than the central portion of the liquid supply tube. The bottom of the insertion channel has a first inclined surface inclined with respect to roller bearing grooves for fine adjustment of the rate of liquid flow, and a second inclined surface terminating in the first inclined surface and inclined in the same direction as the first inclined surface but by a greater angle than the first inclined surface for a coarser adjustment of liquid flow through the liquid supply tube.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: March 2, 1993
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Tsuneo Nakada
  • Patent number: 5171230
    Abstract: A fast flush catheter valve is disclosed having a valve body with a longitudinal bore therethrough for the flow of fluids through the valve. A tube is mounted substantially transverse to the longitudinal bore to substantially block the longitudinal bore. An actuating member is mounted through the exterior of the valve body so that one end of the actuating member is proximate the tube and the second end extends beyond the exterior of the valve body. A resilient biasing flange connects the second end of the actuating member to the exterior of the valve body. A capillary is mounted through the tube to provide a drip rate flow. Depressing the second end of the actuating member deforms the tube to produce a flush rate around the tube and releasing the second end causes the resilient flange to return the actuating member to a position where the tube can elastically return to the longitudinal bore blocking position. The valve is constructed from a few components and is simply and inexpensively constructed.
    Type: Grant
    Filed: November 29, 1991
    Date of Patent: December 15, 1992
    Assignee: Medex, Inc.
    Inventors: Michael Eland, Charles R. Patzer, Jon F. Short
  • Patent number: 5154704
    Abstract: An apparatus clamps an intravenous (IV) tube used in an infusion device to control flow rate of IV fluid in the IV tube. A tube clip has first and second pinching members biased for exerting a pinching force on the IV tube. The first and second pinching members are positionable for insertion of the IV tube between them. A pair of clamping members are coupled to a clamp housing and are positionable for insertion of a portion of the tube clip between the pair of clamping members. The pair of clamping members operably engage the tube clip to variably offset the pinching force based on relative position of the pair of clamping members with respect to one another. A manual adjustment mechanism is coupled to at least one of the pair of clamping members and is used to manually adjust the relative position of the pair of clamping members relative to one another to set a desired flow rate in the IV tube.
    Type: Grant
    Filed: October 31, 1990
    Date of Patent: October 13, 1992
    Inventor: G. Kent Archibald
  • Patent number: 5147292
    Abstract: A handpiece for a surgical irrigator and suction device includes a drip-free valve arrangement in which the portion of the flexible irrigation conduit is kinked in a V-shape. The extent to which the flexible irrigation conduit is kinked is controlled by a trigger, adapted for one-hand operation and in which the trigger can be controlled to be locked, selectively, in a full flow, no flow or manually controllable variable flow mode.
    Type: Grant
    Filed: February 5, 1991
    Date of Patent: September 15, 1992
    Assignee: C. R. Bard, Inc.
    Inventors: Karen E. Kullas, Bruce E. Newcomb
  • Patent number: 5125891
    Abstract: A microsurgical irrigation/aspiration system is provided, including a controller having a pump roller head, actuators for occluding fluid lines, a suction sensor, and means for mounting a pump cassette. The system cassette is suitable for mounting on the controller and has an opening with a pump segment passing along an arcuate wall of the opening. When the cassette is mounted on the console, the roller head is engaged in the cassette opening and compresses the pump segment against the arcuate wall. An infusion line passes through the cassette and is occludable by one of the actuators, and a vent line connected to the pump segment is occludable by a second actuator. A suction sensing port on the cassette couples with the suction sensor in the controller. In an alternate embodiment, a cassette is disclosed within which both vacuum and peristaltic pumping is possible. Latching may be accomplished by a plunger attached to the sensory port of the cassette.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: June 30, 1992
    Assignee: Site Microsurgical Systems, Inc.
    Inventors: K. Mosaddeq Hossain, Jude V. Paganelli, Bernd R. Fischer, Robert M. Bross, Kenneth P. Cook
  • Patent number: 5125911
    Abstract: For use in preventing spillage in a continuous ambulatory peritoneal dialysis apparatus, a two-part spike holder which automatically occludes a flexible tubing connected to the hollow spike as the spike is mounted in the holder, the two parts of the spike holder being pivotally interconnected and biased toward one another.
    Type: Grant
    Filed: February 20, 1990
    Date of Patent: June 30, 1992
    Inventors: Richard W. Grabenkort, William L. Rudzena
  • Patent number: 5102399
    Abstract: A clinical suction tube holder assembly (10), and a method of its use, involve the use of a receiver (12), having a wall (13), for defining a tube-receiving passage (18) attached to a mounting block (14) having pressure sensitive adhesive (16) thereon for selectively mounting the clinical suction tube holder assembly to a fixed structure at a support surface (36) on which a subject (40) to be treated is resting. After treating the subject with a fluid-flow tube (26) a portion thereof is selectively folded on itself and inserted into the tube receiving passage for being held therein at a fixed location with a blocked lumen (30) and for being selectively removed therefrom and unfolded, to thereby unblock its lumen, for further treatment.
    Type: Grant
    Filed: June 11, 1990
    Date of Patent: April 7, 1992
    Inventor: Young K. Chu
  • Patent number: 5098396
    Abstract: An intravascular catheter device that serves to control the loss of blood and subsequent contamination of the operator during placement, is disclosed. The catheter device comprises a cannula, a hub, and a generally cylindrical, resilient valve disposed within the hub. The valve includes an inner surface and an outer surface. The inner surface defines a passage in fluid communication with the cannula and has a plurality of longitudinal inner surface ribs. The outer surface has a plurality of outer surface ribs which are radially aligned with a respective one of the inner surface ribs. The catheter device further includes a ring for selectively compressing the outer surface ribs a distance to bring the inner surface ribs into mutual contact.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: March 24, 1992
    Inventors: Ellis R. Taylor, Robert Case, James D. Morrow
  • Patent number: 5098060
    Abstract: A pinchcock comprises a housing, a tube section of elastically flexible material arranged in the housing, a pinching element displaceable in the housing in a direction extending transversely to the longitudinal axis of the tube section and engaging on the outer side of the tube section and an actuating member for displacing the pinching element. The housing is designed as a plastic molded part, in which a ball is displaceable, as pinching element, in the direction extending transversely to the longitudinal axis of the tube section. The actuating member comprises a cam engaging the ball, this cam being rotatable about an axis aligned at right angles to the longitudinal axis of the tube section and to the direction of displacement of the ball.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: March 24, 1992
    Assignee: Joachim Mogler
    Inventors: Joachim Mogler, Klaus Gaul, Gerd Swaczyna, Helmut Wiedmann
  • Patent number: 5078699
    Abstract: An improved IV system comprising one or more medication bags in which fluid is packaged, a safety IV catheter assembly for delivering fluid from the medication bags to the patient, and a quick-disconnect fluid coupler by which fluid tubing from respective medication bags may be quickly and efficiently connected to fluid tubing associated with the catheter assembly. Each medication bag includes an integral flow control device and drip chamber by which to accurately and selectively regulate the rate at which fluid is supplied to the catheter assembly. The catheter assembly includes a detachable and disposable safety housing into which a solid core trocar can be withdrawn and shielded after making a veni puncture through the patient's tissue. The fluid coupler includes a pair of locking fingers that are rotated through respective locking perforations located adjacent the fluid tube to which the coupler is to be connected.
    Type: Grant
    Filed: September 22, 1989
    Date of Patent: January 7, 1992
    Assignee: Habley Medical Technology Corporation
    Inventors: Terry M. Haber, Clark B. Foster, William H. Smedley
  • Patent number: 5035399
    Abstract: Disclosed is an apparatus for occluding resilient tubing which effectively and conveniently occludes tubing without damage to the tubing, even after repeated clamping. Included in embodiments of the invention are a clamping structure and a protective sleeve formed from a resilient material which is interposed between the tubing to be occluded and the clamp. Also included are structures to prevent the application of the clamp immediately adjacent to the ends of the tubing. Moreover, the clamp can be applied at any one of a plurality of positions along the tube so that no one location along the length of the tube is subject to excessive fatigue. The protective sleeve and the clamp are joined together such that the clamp cannot be applied to the tube without the protective sleeve interposed therebetween. The embodiments of the present invention prevent damage to tubing, such as fragile silicone rubber tubing used in medical applications, even when subjected to repeated clampings.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: July 30, 1991
    Assignee: C.R. Bard, Inc.
    Inventor: Ann M. Rantanen-Lee
  • Patent number: 5026020
    Abstract: A miniature compound lever fluid-operated pinch valve/regulator in which a swell tube is sandwiched between a rectilinearly movable planar member and a frame, and in which the swell tube responds to pressurized fluid to displace the planar member from the frame. A spring-biased lever engages the planar member to collapse the swell tube in the absence of the pressurized fluid. A pinch lever is also mounted in the frame and is engaged by the spring-biased lever. The result is a compound lever mechanism which responds to the swelling and collapse of the swell tube in response to a pressurized fluid introduced into the swell tube to cause the mechanism to perform a pinching function on a resilient fluid-carrying tube passing through the valve/regulator.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: June 25, 1991
    Inventor: Frank A. Betush
  • Patent number: 5017192
    Abstract: A free flow prevention system for preventing free flow of fluid through IV tubing when the tubing is disconnected from an infusion pump. A flexible clamp is provided having a pair of clamping arms, which define a variable width slot for receiving the IV tubing. The IV tubing may be moved along the slot between a first position wherein the width of the slot is sufficient to permit the clamp to be positioned longitudinally along the IV tubing, and a second position wherein the width of the slot is normally less than the width of the slot at the first position. The clamping arms are resiliently biased to a closed position wherein the IV tubing is squeezed when in its second position to close the lumen to prevent fluid flow. A clamp-receiving passageway and clamp-opening wedge are provided on the infusion pump.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: May 21, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Larry H. Dodge, Stanford C. Stone
  • Patent number: 5010968
    Abstract: A blood agitating and weighing device includes a base member and a support member, pivotally mounted with respect to the base member, for journally supporting a container, such as a flexible blood storage bag. A spring member is provided for biasing the support member to a first tilted position relative to the base member and a flexible bladder is positioned beneath the support member. The bladder is expandable in response to the introduction of pneumatic pressure therein to overcome the bias of the spring member to move the support member to a second tilted position relative to the base member. The bladder is contracted in response to the release of pneumatic pressure to allow the spring member to move the support member back to the first position. The support member is therefore alternately moved between the first and second positions by the alternating expansion and contraction of the bladder to agitate the blood in the container.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: April 30, 1991
    Inventor: Thomas E. Barrow
  • Patent number: 4974811
    Abstract: A roller clamp for regulating fluid flow through a plastic tube comprising a bottom plate for receiving the plastic tube, a pair of sidewalls each having a guide groove, and a roller wheel for pressing the plastic tube is disclosed. The bottom plate has a V-shaped channel along its longitudinal direction and a pair of projections each having a pointed end are formed on the top of lines each extending from the lowest position of the V-shaped channel. A required amount of fluid can be supplied at a constant flow velocity thanks to small tube resistance.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: December 4, 1990
    Assignee: Nissho Corporation
    Inventor: Yoshihiro Ishida
  • Patent number: 4963131
    Abstract: A superior cassette is provided for maintaining sterility of internal tubing sections that are to be repeatedly clamped under the control of external actuators when the cassette is inserted in an associated system, such as an irrigation/aspiration system for ophthalmic surgery applications. An inserted leading edge presents faces of interior sliders to actuators which reciprocate the slider to engage and clamp tubing sections positioned near the opposite, intercoupling edge of the cassette. All contact is made within the sterile interior of the cassette so that sterile flows cannot be contaminated even if leakage or puncture occurs under handling or repeated operation.
    Type: Grant
    Filed: March 16, 1989
    Date of Patent: October 16, 1990
    Assignee: Surgin Surgical Instrumentation, Inc.
    Inventor: Theodore S. Wortrich
  • Patent number: 4960259
    Abstract: A shut-off valve for a fluid flow or an infusion instrument is described. A sleeve-form casing (2) with a lateral opening (4) between its ends is provided. An elastic tube piece (7) lies within casing (2) to allow fluid flow therethrough. A pressure body (14) is movable radially within the lateral opening (4) to selectively compress or not compress the tube piece (7) so as to occlude or open fluid flow through the tube piece (7). For simplification of manufacture and for quick operation of such a shut-off valve, especially without painful or injurious activities in operation, a tubular guide sleeve (8) is provided and surrounds the lateral opening (4) of the casing. Sleeve (8) is arranged to laterally project from the casing (2) and includes at least one pair of blocking stops (10, 10', 11 11'). The pressure body (14) has a plug shape. On the end of the pressure body (14), facing away from the tube piece (7), there is fastened a cap (16) with an elastic mantle (12) and snap ring (18) depending from the cap.
    Type: Grant
    Filed: March 28, 1989
    Date of Patent: October 2, 1990
    Assignee: Joka Kathetertechnik GmbH
    Inventors: Lars Sunnanvader, Tomas Hartig
  • Patent number: 4950255
    Abstract: A combination catheter connector and clamp provided with an interlocking hook and post for locking two connector parts together. A manifold separates the lumens of a multilumen catheter into separate arms which can be closed or opened by a pushbutton clamp. A silicone block is used between the engagement portions of the connector parts.
    Type: Grant
    Filed: April 7, 1988
    Date of Patent: August 21, 1990
    Assignee: I-Flow Corporation
    Inventors: Eric W. Brown, Charles Kienholz, Earl F. Robinson, Rex O. Bare
  • Patent number: 4936542
    Abstract: A valve for selectively controlling flow within a fluid line between a relatively low capillary flow rate and a flushing flow. A flush valve (10) comprises a base (14) and a cover (16) that secures an elastomeric membrane (18) in place over a flow path (32) formed in the base. The flow path includes an inlet passage (34) connected in fluid communication to an outlet passage (50) by a capillary groove (38). The membrane seals over the capillary groove to define a capillary passage (48), which restricts fluid flow through the flush valve to the capillary flow rate. A user may selectively enable the relatively greater fluid flow through the device by deforming the membrane away from the capillary groove, thereby creating a relatively larger flushing flow passage (66). The flushing flow of fluid through the region of the capillary groove serves to carry away any obstruction that may be present in the groove or downstream of the flush valve.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: June 26, 1990
    Assignee: Abbott Laboratories
    Inventor: Robert W. Beard, deceased
  • Patent number: 4925444
    Abstract: A multiple fluid delivery system usable for the delivery of intravenous fluids to a patient from a plurality of fluid sources includes flexible tubing members for coupling the sources to a fluid junction member. The fluid junction member, wherein little or no interfluid mixing occurs, is coupled by an output conduit to a controllable pump. Output from the pump, via a further fluid flow conduit, can be coupled to the patient's catheter. The system can multiplex a plurality of different fluids. Spaced apart sequences of fluid quanta are injected into the output conduit from the fluid flow junction. The fluids are either mixed, or not, in the output conduit as desired. Operator interaction and control of the system can occur either through a display screen or by means of a bar code sensor. Hard copy records can be provided of fluid flow delivery schedules or other related information.
    Type: Grant
    Filed: August 7, 1987
    Date of Patent: May 15, 1990
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Fredric I. Orkin, Theodore Liber, Charles R. Smith, Kimball J. Knowlton, Albin Huntley
  • Patent number: 4919649
    Abstract: A fluid delivery system is provided with a disposable delivery set which includes an inlet tube, an outlet tube and a column tube connected to a syringe. A motor set is arranged to operate the syringe while sensing the level of fluid in the column tube, whereby the syringe may be reciprocated to provide incremental volumes of fluid to a patient.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: April 24, 1990
    Assignee: Sherwood Medical Company
    Inventors: Earle J. Timothy, Edward W. Jackson, Joseph A. Mingrone, Jeffrey W. Jolie, Dennis L. Nudelman, John F. Howard
  • Patent number: 4889527
    Abstract: A two-piece coupling device is provided for the exchange of liquid or gaseous material. The first coupler has a sleeve with a longitudinal central passage and an axially projecting extension with at least one step. A jacket at least partially surrounds the extension. The first coupler also has a detachable fastener and a resilient tubular connection which is secured at one end within the jacket. The second coupler has a detachable fastener which cooperates with the fastener of the first coupler, and a hollow projection extending toward the first coupler. The hollow projection surrounds the entire extension of the sleeve of the first coupler, as well as part of the jacket. The device also includes an automatic blocking element for preventing the flow of the media through the tubular connection when the first coupler is separated from the second coupler.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: December 26, 1989
    Assignee: Contempo Products, P. Herrli
    Inventor: Peter Herrli
  • Patent number: 4878646
    Abstract: A pinch valve mechanism for a parenteral infusion system is provided which includes a spring-loaded pinch valve. The pinch valve is manually latched to its open position. A bobbin and cam mechanism includes a length of wire which contracts when a current is applied to it. The cam has two positions, one which holds the pinch valve in its open position and one which enables to pinch valve to close. When it is desired to automatically close the pinch valve, a current is applied to the wire. The contraction of the wire moves the cam from its valve open position to its alternate position, permitting the pinch valve to spring closed.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: November 7, 1989
    Assignee: Critkon, Inc.
    Inventors: Howard Edelman, Carl Ritson
  • Patent number: 4878894
    Abstract: The present invention is a gas/saline valve for use in an gas/saline insufflation system which includes a gas insufflator and a saline source. The gas insufflator is fluidly coupled to a gas inlet of an arthroscopic attachment by a first tubing. The saline source is fluidly coupled to a saline inlet of an arthroscope by a second tubing. The gas/saline valve includes a housing with an open end and a gas/saline control knob. The housing has a first bore and a second bore. The housing also has a first slotted chamber and a second slotted chamber both of which are contiguous to the first and second bores, respectively, and within which the first and second tubings, respectively, are disposed. The gas/saline control knob has a solid cylinder which has a first semi-cylindrical notch and a second semi-cylindrical notch so that when the solid cylinder is disposed inside the housing, the first and second semi-cylindrical notches are aligned with the first and second slotted chambers, respectively.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: November 7, 1989
    Inventors: Leroy V. Sutter, Harold A. Cameron
  • Patent number: 4869457
    Abstract: Arrangement for controlling and regulating a liquid (2) flowing through a line (3). The arrangement comprises a valve body (9) provided with a press-on or deforming element (11) moveable along the line and designed to cooperate with the said line for regulating the flow of the liquid (2), by means of restriction thereof to varying degrees. In the line (3) there is fitted a continuous hollow element (4) having a number of openings (8) through which the said liquid can flow. The press-on element (11) moveable along the hollow element (4) is designed to press the line (3) against the said element (4). By this means a shifting of the press-on element can be carried out such that an optional area of the openings can be uncovered for throughflow since that part of the hollow element where the said area is located is situated on the outlet side in relation to the press-on element.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: September 26, 1989
    Inventor: Goran Ewerlof
  • Patent number: 4869721
    Abstract: A flow regulator for liquids passing through a resiliently deformable tube (18), the regulator comprising a body including a channel (8) to receive the tube (18), a channel floor (10) less than the length of the body, two axle tracks (12) in the inner faces of the channel walls (9) extending over the channel floor (10), a wheel (13) supported by stub axles (14) in the tracks (12) and a groove (15) of varying cross-sectional size in the channel floor (10) into which the tube (18) is forced as the wheel (13) passes over the groove (15).
    Type: Grant
    Filed: September 29, 1987
    Date of Patent: September 26, 1989
    Inventor: Ladislav S. Karpisek
  • Patent number: 4856755
    Abstract: A device for controlling the flow of a parenteral fluid, comprises a resilient tubular body of an infusion tube having a flattened portion with two parallel opposed walls. Each wall has a tapering groove, the grooves together defining a longitudinal region of non-contact between the walls of tapering cross-section. Regulating means is provided for flexing a short length of the body about a longitudinal axis of the body so as to urge the two walls together so that the rate of flow is determined by the cross-section of the region of non-contact at said length. Flexure about the longitudinal axis of the body avoids cold-flow of the region of non-contact. The regulating means comprises a support and an operating member longitudinally movable relative to the support, the body being flexed at said length by the co-operation of the support and the operating member. The support is preferably a channel having side walls which define grooves to guide a roller for longitudinal movement relative to the channel.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: August 15, 1989
    Inventor: Ellis W. Clarke
  • Patent number: 4834702
    Abstract: A kidney-ureter catheter unit comprises a flexible catheter (2) provided with an introduction end (2a) of truncated conical form close to which radial drainage holes (3) are pierced. Within catheter (2) is slidably engageable a semi-rigid dilator mandrel (4) provided with an introduction end (4a) of truncated conical form and in turn slidably engaged by a semi-rigid guide element (12) having a rounded introduction end (12a). A spring (5) detachably fastens mandrel (4) to catheter (2) in an insertion condition with respect to each other in which the introduction ends (2a, 4a) of catheter (2) and mandrel (4) have the respective generators in alignment, so as to form a continuous frusto-conical surface.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: May 30, 1989
    Assignee: Hoechst Italia Sud SPA
    Inventor: Francesco Rocco
  • Patent number: 4827970
    Abstract: A liquid dropping control device holds a bendable tube between a stationary klemmen and a movable klemmen, and adjusts a throttling amount of the tube by the movable klemmen, and comprises a means for detecting dropping of a liquid staying in a dropping tube, to be connected to said tube; a means for moving at high speed the movable klemmen to a direction of opening said tube so as to rapidly start dropping of the liquid staying in the dropping tube; a means for, after detecting start of the liquid dropping, moving the movable klemmen in a direction of throttling the tube and stopping it; and a means for, after detecting subsequent droppings, moving the movable klemmen at low speed so as to control said subsequent droppings at a determined speed.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: May 9, 1989
    Assignee: Kawasumi Laboratories, Inc.
    Inventors: Yuzuru Sugisaki, Makoto Takada, Kazuhiko Tokuda, Yasuo Suzuki, Takashi Oya, Shoichi Tomeba, Shinichiro Yoshida
  • Patent number: 4804360
    Abstract: The invention provides an intravenous line valving system. The invention includes a flexible tube mounted onto the interior surface of a drip chamber spike, the spike having an aperture through its exterior. A preferred embodiment of the invention includes squeezing means, removably attachable about the spike proximate to the aperture, for squeezing the flexible tube against the interior surface of the spike so as to regulate the flow of intravenous fluid.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: February 14, 1989
    Inventor: Dean L. Kamen
  • Patent number: 4802650
    Abstract: A set for the passive infusion of one or more medications at a determined rate includes a fluid supply tube having first and second branched flow paths with first and second rate-defining flow restrictors. An injection port upstream of the first flow restrictor permits injection of a drug to be metered, so the first restrictor provides a metered flow of drug plus carrier, and the second restrictor provides a metered flow of diluent/carrier. A Y-connector, which may contain a mixing element, combines the two flows to provide the desired output flow and drug concentration. Further flow branches, each with an injection port and a flow restrictor, allow additional drugs to be metered in other concentrations. A flushable flow restrictor segment includes a flexible flow tube which may be pinched off, and a substantially rigid capillary tube integral with the flexible tube.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: February 7, 1989
    Assignee: Abiomed, Inc.
    Inventor: Saul Stricker
  • Patent number: 4787406
    Abstract: A clamp apparatus useful for controlling the flow of fluid through a flexible conduit which comprises: a resilient pad element adapted to aid in at least partially occluding the conduit; and a force system structured to be moved to at least partially occlude the flexible conduit such that when the force system is activated the flexible conduit contacts both the resilient pad element and the force system and the resilient pad element moves in response to the activation of the force system, provided that the force system is adapted to maintain the flexible conduit in at least one state of partial occlusion.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: November 29, 1988
    Assignee: Baxter International Inc.
    Inventors: Fred Edwards, Eric Barr
  • Patent number: 4787890
    Abstract: The invention relates to a feeding system (1) for enteral feeding comprising a container (2) preferably constructed as a disposable article for receiving the food. Said container (2) is disposed in a suspension means (3) which is constructed such that the container (2) in the suspended state points with its opening (5) upwardly and assumes a position inclined to the horizontal. As a result when the tubing system (4) is introduced into the container for suppyling the nutrient solution to the patient no leaks can occur because the opening (5) points upwardly so that along the periphery of a piercing tube (17) introduced into the container (12) no solution can drip out. Nevertheless, due to the inclined position of the container (2) and the arrangement of the end of the inserted piercing tube (17) at the lowermost point (6) of the container (2) all the solution can be extracted; for this purpose for the extraction preferably a drip chamber (21) is provided in connection with a tube clamp ( 26).
    Type: Grant
    Filed: January 9, 1987
    Date of Patent: November 29, 1988
    Assignee: Fresenius AG
    Inventor: Rudiger Ufermann
  • Patent number: 4773897
    Abstract: The collection container has a reusable, autoclavable vessel with a resilient plastic reusable insert to which the aspiration instrument is connected. The insert incorporates a fluid passageway which may be blocked by squeezing action of a solenoid-type actuator. The insert includes a breakaway portion which is severed from the body of the insert during installation prior to use. This insert may also stay in place during autoclaving or cleaning.
    Type: Grant
    Filed: November 6, 1986
    Date of Patent: September 27, 1988
    Assignee: Storz Instrument Company
    Inventors: Gregg Scheller, Jerry Gahn, James Easley
  • Patent number: 4772256
    Abstract: The present invention is directed to improved methods and apparatus for the collection of blood, which are particularly useful for autotransfusion purposes. The apparatus includes an upper reservoir wherein the collected blood enters the device. A lower container is placed in fluid communication with the upper reservoir. Disposed within the interior of the container is a conventional blood bag which is in turn placed in fluid communication with the upper reservoir. The upper reservoir has two external connections. The first connection is for receiving blood from the patient. The second external connection places the upper reservoir in communication with a source of vacuum. In one embodiment of the present invention a filtering structure is disposed within the upper reservoir and is connected directly to the inlet connection from the patient.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: September 20, 1988
    Assignee: Lantech, Inc.
    Inventors: Perry L. Lane, William D. Wallace
  • Patent number: 4753371
    Abstract: S-shaped opening and closing element for controlling the flow of a fluid or body (powder, granulate) and adaptable to any form of package or fitting containing fluids, characterized in that its shape in two S-bends permits both an instantaneous stoppage of the flow of the fluids and an instantaneous flow of said fluids; this, as a function of the given position, by manual or mechanical traction on the element. The S-shape ensures very effective fluid-tightness, without supplementary elements. The opening and closing element can be employed for controlling flow from a container having a supporting device for the element. The container can have more than one compartment.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: June 28, 1988
    Inventors: Serge Michielin, Roland Nydegger
  • Patent number: 4743235
    Abstract: A device for controlling the flow of liquid to a catheter. Two end caps support a capillary tube that provides continuous flow of liquid from one end cap to the other. A flexible, resilient sleeve is connected at its ends to said end caps and surrounds said capillary tube. Said sleeve, when pulled away from said capillary tube, provides an alternate high flow volume flow from one end cap to the other outside of the tube.
    Type: Grant
    Filed: September 5, 1986
    Date of Patent: May 10, 1988
    Assignee: Medex, Inc.
    Inventors: Charles C. Waldbillig, Jon F. Short
  • Patent number: 4731069
    Abstract: A tube for use in a flow controller of an intravenous or other slow flow control apparatus has a configuration somewhat like the opening defined by the open eyelids of the human eye whereby to provide relatively sharp corners and narrow width of the opening to reduce materially the force required to close relative to that required to close a round tube and to reduce the movement of the flow control element of the controller, which controller is configured to take advantage of the shape of the tube and employs a shape memory control element to adjust rate of flow of the fluid; the controller also including a brake element to lock the flow rate at a particular preselectable rate.
    Type: Grant
    Filed: February 26, 1987
    Date of Patent: March 15, 1988
    Assignee: Beta Phase, Inc.
    Inventor: John F. Krumme
  • Patent number: 4725037
    Abstract: Tubing through which fluid flow is to be regulated is placed in a regulating clamp wherein it is clamped between a movable roller wheel and a surface of the clamp. Flow rate through the tubing is changed as determined by longitudinal adjustment of the position of the roller wheel. A full shut-off of flow through the tubing at a particular shut-off zone of the roller clamp is assured by means of ledge elements extending from the sidewall of the housing. These ledge elements, so as to provide a transitional deformation, are located in spaced relation to the clamping surface and are configured monotonically to provide a transitional and monotonically configured deformation of the tubing to avoid accidental rupture thereof, at the same time fully confining the tubing to prevent the formation of lumens in the peripheral edge portions thereof. In addition, full shut-off of the edge portion of the tubing is assured for parallel acting roller clamps, throughout the travel range of the wheel, if so desired.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: February 16, 1988
    Inventor: Marvin Adelberg
  • Patent number: 4725269
    Abstract: A disposable crimping valve assembly for parenteral solution delivery systems comprises a two-piece tubing receptor housing hingedly connected and with an irreversible snap connection which will not permit removal of the device from parenteral tubing after assembly. A back section has an integral movable pressure plate attached to the housing by integral flexible web connectors. When the movable plate is actuated toward the stationary press surface, tubing is bent over a sharp ridge element until the wall thereof contacting the sharp ridge collapses in a crimping action. The motor drive assembly provides rotational pressure to a threaded actuator engaging the back section without applying axial pressure thereto. The clamp permits manual adjustment to set flow rates when it is separated from the control housing.
    Type: Grant
    Filed: November 18, 1985
    Date of Patent: February 16, 1988
    Assignee: Critikon, Inc.
    Inventors: Hal C. Danby, Carl Ritson
  • Patent number: 4715279
    Abstract: A Supplementary Liquid Dispensing Device is disclosed. The Supplementary Liquid Dispensing Device is particularly useful in lithographic printing presses and in particular for dampening systems within such presses. The device dispenses from an enclosed source of a given liquid a continuous flow of the given liquid which is part of a fountain solution of the dampening system by metering the continuous flow of liquid proportionate to the rate of evaporization of the liquid in a fountain solution with very minimal evaporization loss of the liquid by the device. The device reduces air polution particularly when a volitile liquid such as alcohol is a part of the fountain solution. The device also has the advantage of supplementing and replacing alcohol in a fountain solution in a very inexpensive way without the use of a highly sophisticated and complex electronic system.
    Type: Grant
    Filed: February 6, 1987
    Date of Patent: December 29, 1987
    Inventor: Rocco J. Albanese
  • Patent number: RE33219
    Abstract: A clamp valve is made which comprises a hollow member open at one end and which has a pair of apertures through side walls thereof. A slide is movable in the hollow member and has a transverse aperture therethrough so that a conduit which has a pliable resilient wall can in use be passed through both of the apertures in the hollow member and the aperture in the slide. Biassing means are provided to bias the slide relative to the hollow member so that the conduit is in use normally clamped between an edge of the aperture in the slide and an edge of one of the apertures in the hollow member so that the conduit is normally closed to fluid flow.
    Type: Grant
    Filed: January 4, 1989
    Date of Patent: May 22, 1990
    Assignee: Fisher & Paykel Limited
    Inventors: Michael G. Daniell, Gerald S. Martin