By Low Level Float Cutoff Patents (Class 604/127)
  • Patent number: 9352080
    Abstract: A burette (10) to receive liquid from an intravenous supply (29) to deliver liquid to a patient via a tube (30). The burette (10) includes a hollow body (11) that is generally cylindrical configuration and that contains a float valve (24). Liquid level in the chamber (12) of the body (11) regulates liquid level within the chamber (12) by engaging an inlet passage (36) or an outlet tube (25).
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: May 31, 2016
    Assignee: ANALYTICA LIMITED
    Inventors: Stephen Francis Goodall, Angelo John Maltabes, Geoffrey Daniel Daly
  • Publication number: 20130303987
    Abstract: A valve for use with a container having intravenous liquid therein, the valve including: a valve body including a valve chamber formed therein; an inlet in fluid communication with the valve chamber; means for connecting the inlet, in use, to the container so that liquid can flow through the inlet to said valve chamber; an outlet having means for connection, in use, to a catheter for intravenous delivery of the liquid; the outlet including an outlet port which opens to said chamber, the port being surrounded by a valve seat; a diaphragm; mounting means for mounting the diaphragm to the body so that a peripheral edge or edge region sealingly engages the body and closes said chamber and such that the diaphragm sealingly engages the valve seat; the arrangement being such that, in use, the head of liquid within the container unseats the diaphragm from the valve seat so that the liquid flows to said outlet but when the level of liquid in the container falls to a predetermined level the diaphragm sealingly engages
    Type: Application
    Filed: November 3, 2011
    Publication date: November 14, 2013
    Applicant: CHIMDEN MEDICAL PTY. LTD.
    Inventor: Philip Stuart Esnouf
  • Patent number: 8506535
    Abstract: A gas vent valve assembly may be attached or incorporated to a disposable fluid transfer set used with a fluid warmer to administer an infusate to a patient. The gas vent valve assembly has a housing having a fluid inlet, a gas outlet and a fluid outlet. The gas outlet is located at the top of the housing while the fluid outlet is located at the bottom of the housing. The fluid inlet is located at a side lower portion of the housing. Inside the housing is an actuator float that has an upper seal and a lower seal. The dimension of the float relative to the chamber of the housing is such that the float is freely movable within the housing to an upper position whereby its upper seal closes the gas outlet while the fluid outlet is opened, and to a lower position whereby its lower seal closes the fluid outlet and the gas outlet is opened. The movement of the float is dependent on the respective amounts of air and fluid in the housing, and the buoyancy of the float relative to the fluid in the housing.
    Type: Grant
    Filed: January 23, 2009
    Date of Patent: August 13, 2013
    Assignee: Smith Medical ASD, Inc.
    Inventors: Eric Andersen, Rene Robert, Gary Searle, Vincent Waldron
  • Publication number: 20120226236
    Abstract: For the administering of medicaments, an adapter is provided for connection to a haemodialysis tube set, which makes possible the direct connection of a standard injection vial to the extracorporeal circuit, avoiding the introduction of air into the circuit. The adapter has two conduit pathways. The conduit pathway for the application of medicament contains a gas-blocking element. The second conduit pathway serves for the aeration of the injection vial.
    Type: Application
    Filed: November 3, 2010
    Publication date: September 6, 2012
    Inventors: Massimo Fini, Stefan Weiss, Andreas Terpin, Alain Veneroni
  • Publication number: 20100225494
    Abstract: An intravenous fluid outage warning device comprising: A hollow body having a fluid chamber provided thereof, a fluid inlet and fluid outlet in communication with said fluid chamber, said fluid inlet being made such that it is capable of allowing entry of intravenous fluid from a fluid containing member and the fluid outlet being disposed in a manner wherein the intravenous fluid can flow through towards a standard fluid drip administering means for medication or hydration, float means disposed within the fluid chamber being made such that it is floatable when fluid is contained in the fluid chamber and capable of plugging the mouth of the fluid outlet when said fluid is already depleted, thereby preventing the entry of air to the fluid drip administering means, an activating member provided on said hollow body being held thereof in a manner wherein it is capable of tilting by the float means as the level of the fluid in the fluid chamber goes down, an electric contact circuit assembly being held on said holl
    Type: Application
    Filed: January 21, 2010
    Publication date: September 9, 2010
    Inventor: Gregory L. Thorpe
  • Patent number: 7731709
    Abstract: A leveling device for determining the zero pressure point of an external draining system with respect to a patient is provided. The leveling device generally includes a body having a viewing element defining a field of vision, and a reference point indicator spaced apart from the viewing element and disposed within the line of vision. The viewing element and the reference point indicator define a line of sight. The device further includes a horizontal level indicator mated to the body and oriented parallel to the line of sight established by the viewing element and the reference point indicator. The horizontal level indicator is effective to indicate the horizontal alignment of the body with respect to a particular reference point viewed through the viewing element and indicated by the reference point indicator.
    Type: Grant
    Filed: August 15, 2007
    Date of Patent: June 8, 2010
    Assignee: Codman & Shurtleff, Inc.
    Inventor: Stephen Ferrer Wilson
  • Publication number: 20090322545
    Abstract: The present invention includes medical fluid injector systems that detect the contents and/or volume of such contents within a syringe of the system. For example, an RF signal from a first antenna of a medical fluid injector may be transmitted through a syringe associated with the medical fluid injector. At least some of the transmitted RF signal may be received by a second antenna of the medical fluid injector An amount of the RF signal received by the second antenna may be measured to provide information regarding the contents and/or volume of such contents within the syringe.
    Type: Application
    Filed: August 6, 2008
    Publication date: December 31, 2009
    Inventors: Chad M. Gibson, Vernon D. Ortenzi
  • Publication number: 20090287152
    Abstract: A burette (10) to receive liquid from an intravenous supply (29) to deliver liquid to a patient via a tube (30). The burette (10) includes a hollow body (11) that is generally cylindrical configuration and that contains a float valve (24). Liquid level in the chamber (12) of the body (11) regulates liquid level within the chamber (12) by engaging an inlet passage (36) or an outlet tube (25).
    Type: Application
    Filed: October 12, 2006
    Publication date: November 19, 2009
    Inventors: Stephen Francis Goodall, Angelo John Maltabes, Geoffrey Daniel Daly
  • Patent number: 7547295
    Abstract: An active gas removal system is provided to remove air or gas bubbles from an intravenous fluid prior to infusion into the patient. The system detects the level of liquid in a drip chamber and occludes a downstream valve to the patient, thereby increasing pressure in the drip chamber sufficient to open a vent valve and release gas therein.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: June 16, 2009
    Assignee: Enginivity, LLC
    Inventor: David E. Cassidy
  • Patent number: 7338470
    Abstract: An air-bubble-monitoring medication assembly includes a drug infusion subassembly having a tube for administering therein a liquid to a patient, a bubble-size determinator which is positioned to sense an air bubble entrained in the liquid in the tube and which determines the volume of the air bubble, and an analyzer. The analyzer logs the time the detector senses an air bubble and the volume of the air bubble, calculates a running sum of a total air volume of all air bubbles sensed over a time interval, compares the running sum with a preselected limit, and generates an output when the running sum exceeds the preselected limit. The medical system additionally includes a controller assembly which determines a delivery schedule for administering the liquid and which controls the drug infusion subassembly to administer the liquid in accordance with the determined delivery schedule. The method performs the analyzer functions.
    Type: Grant
    Filed: December 3, 2003
    Date of Patent: March 4, 2008
    Assignee: Ethicon Endo-Surgery, Inc.
    Inventors: Hal H. Katz, Paul J. Niklewski, Gregory D. Bishop
  • Publication number: 20040054377
    Abstract: A flexible cannula is revealed, the cannula useful in graspers for the removal of objects such as stones, calculi, concretions, foreign bodies and the like from the urinary, biliary, vascular or other systems. The flexible cannula is made by removing material in a portion of the cannula near the distal end. The material is preferably removed by laser-cutting the cannula in a spiral pattern, so that material continuity and integrity is maintained, while allowing much greater flexibility. The technique may be used on standard graspers and on laser graspers, and is useful as a part of medical devices, such as ureteroscopes, in which a physician enters a body to remove objects. The flexible cannula may also be used with other devices to cut or spear objects for removal, such as for a biopsy.
    Type: Application
    Filed: July 11, 2003
    Publication date: March 18, 2004
    Inventors: Thomas L. Foster, Frederick D. Roemer
  • Patent number: 6641559
    Abstract: A buret with foot valve for medical infusion equipment, including a transparent cylindrical container having a bottom wall with a central outlet hole for outlet of the liquid and a lateral graduated scale for indication of the level of the liquid. A float disk co-operates inside the container with the graduated scale for immediate identification of the level of the liquid, and a valve obturator is associated to the float disk for closing the outlet hole when the liquid inside the container comes to an end. The valve obturator is floating with respect to the float disk.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: November 4, 2003
    Assignee: Industrie Porla SPA
    Inventor: Gianni Guala
  • Patent number: 6569116
    Abstract: An intravenous (IV) flow controlling device comprises a flexible open container having a specific gravity less than one and an outer diameter smaller than that of the drip chamber, the container including a spherical bottom portion thinner than the shell upper portion thereof; a first plastic tube coupled to the bottom of the container being in communication with the exit; a flexible reservoir having one end coupled to the first tube; and a second plastic tube coupled to the other end of the reservoir being in communication therewith. The container is submerged as fluid filled in the drip chamber. Fluid flows through the exit, the first plastic tube, the reservoir, and the second plastic tube to cause the container to fall, thereby stopping fluid exiting when the bottom portion of the container clogs the exit and fluid in the drip chamber is used up.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: May 27, 2003
    Inventor: Hsien Tsung Wang
  • Patent number: 6481455
    Abstract: A bubble trap for an extracorporeal blood handling or other fluid handling system has a chamber (10) constructed from a top section (20) and bottom section (30). There is a fluid inlet (50), gas vent port (70) for purging gas that has separated from the fluid in the chamber, and a fluid outlet (50). There are two balls (64) and (74), which act as check valves to prevent fluid flowing out the vent port, and gas escaping through the fluid outlet. The chamber geometry prevents entrapment of either ball in the corner as blood level rises or falls. Squeeze bulbs (66) and (76), and shutoff valves (68) and (78), provide for unseating the check balls.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: November 19, 2002
    Assignee: Vernon C. Maine PLLC
    Inventors: Robert Christian Gustafson, Vernon C. Maine
  • Patent number: 5837007
    Abstract: Intracardiac lead for compliant fixation of a distal end of the lead to cardiac tissue. A fixation helix is disposed at the distal end of the lead. The fixation helix has a first end rigidly attached to the compliant fixation device and a second end that is sharpened to facilitate insertion of the fixation helix into cardiac tissue. The fixation helix can be designed to provide for either electrically active or inactive fixation. Once the lead is implanted in the cardiac tissue, the compliant fixation device, connecting the lead with the fixation helix, reduces the amount of lead movement that is transferred to the patient's tissue at the site of implantation of the fixation helix and reduces those forces from lead movement that could cause dislodgment of the fixation helix.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: November 17, 1998
    Assignee: Pacesetter, Inc.
    Inventors: Peter A. Altman, M. Elizabeth Bush, Dean F. Carson
  • Patent number: 5814012
    Abstract: A method and apparatus for relieving insufflation pressure in a body cavity (18) in excess of a predetermined value are provided. A conduit assembly (24) extends from the body cavity (18) through the surface (61) of a fluid reservoir and has a port (63) positioned beneath the fluid surface (61). The relief pressure is selected by setting the relative positioning of the open end (63) and fluid surface (61). The apparatus avoids insufflation gas leakage problems associated with known insufflation pressure relief devices.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: September 29, 1998
    Assignee: Birtcher Medical Systems, Inc.
    Inventors: Richard P. Fleenor, Alan R. Lee
  • Patent number: 5722961
    Abstract: Disclosed is a flow control device for use with an intravenous set to control the flow of medicinal fluid in a barrel into patient's body. The flow control device comprises a floating member capable of being supported for floating by the buoyancy of the medicinal fluid and having a first hollowed portion facing upwards so that the hollowed portion can contain medicinal fluid and a second hollowed portion facing downwards. A linkage bar is secured to the floating member by insertion into the second hollowed portion. A membranous member is coupled via the linkage bar to the floating member such that the membranous member moves along with the floating member.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: March 3, 1998
    Assignee: King-He Hung
    Inventor: Cheng-Kuo Fan
  • Patent number: 5415325
    Abstract: A dropper-controller including a reservoir connected with a dropper bottle containing a liquid medicine, and an automatically sealing member formed by a cup-like buoyage and disposed in the reservoir. When the liquid medicine gradually drops from the dropper bottle into the reservoir, the buoyage is buoyed up and automatically open a lower discharging opening of the reservoir, permitting the liquid medicine to flow through a hose to an injection needle for injection. When the liquid medicine in the dropper bottle is about exhausted, the level of the liquid medicine in the reservoir descends, making the buoyage together move downward onto the discharging opening of the reservoir and seal the same so as to interrupt the passage of the liquid medicine.
    Type: Grant
    Filed: August 9, 1994
    Date of Patent: May 16, 1995
    Inventor: Han C. Shu
  • Patent number: 5372591
    Abstract: An improved solution dispensing device for intravenous drip comprises a container of tubular construction and having at the top thereof a connecting needle piercing through the mouth of a solution bottle. The container is connected at the bottom thereof with one end of a solution transporting tube having another end that is connected with a hypodermic needle. A stopping element is disposed in the container such that the stopping element can be caused to rise or descend in accordance with the solution level. The solution transporting tube has an extension segment that is disposed in the container. The stopping element is provided with a recessed portion corresponding in location to the extension segment. As the stopping element is caused to descend so that the extension segment is enclosed by the recessed portion, a compartment is formed between the outer wall of the extension segment and the inner wall of the recessed portion.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: December 13, 1994
    Inventors: Hwang-Roan Jeng, Jiune-Piin Yang
  • Patent number: 5281201
    Abstract: An improved float safety mechanism (also herein "float control valve") for a gas pressurized bottle irrigation system is disclosed herein and a procedure involving the use and application thereof is also herein disclosed. In the improved safety float system of this invention, a pressurizable reservoir containing a laproscopic irrigation fluid is provided with a unique and highly reliable float or anti-siphon valve for real-time sensing of the fluid level within the reservoir and automatically terminating the withdrawal of the fluid therefrom when the level of fluid drops below a prescribed limit. The design of the anti-siphon valve used in this system is unique to the demanding pressurized environment within which the valve must function. The float safety mechanism of this invention prevents the high pressure CO.sub.2 gas contained with the pressurizable reservoir from escaping (after depletion of the fluid) and entering the abdominal cavity during laparoscopy, causing possible serious or fatal injury.
    Type: Grant
    Filed: July 15, 1991
    Date of Patent: January 25, 1994
    Inventor: James H. Dorsey, III
  • Patent number: 5242424
    Abstract: A device for use in controlling the intravenous drip comprises a cap and a dripping vessel. The cap is connected with a solution bottle of the intravenous drip by means of an upper connecting tube while the dripping vessel is in communication with a hypodermic needle by means of a lower connecting tube. The cap is provided thereon with a gas column having therein a gas duct in which a press rod is movably disposed. The gas in the upper connecting tube and the dripping vessel can be let out rapidly by means of the press rod.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: September 7, 1993
    Inventor: Yueh-Horng Chen
  • Patent number: 5031654
    Abstract: A fluid passage valve selectively opens and closes a fluid passage port defined in a bottom of a chamber which contains a fluid to be transfused into a patient's vein. The fluid passage valve has a valve member movable toward and away from the fluid passage port to open and close the fluid passage port, and a valve member casing which houses the valve member. The valve member casing has a plurality of limbs which are progressively spread outwardly away from each other in a direction toward the bottom of the chamber, so that the valve member will not be caught by the limbs when the valve member is lowered to close the fluid passage port.
    Type: Grant
    Filed: June 29, 1990
    Date of Patent: July 16, 1991
    Assignee: Terumo Kabushiki Kaisha
    Inventor: Masahiko Kobayashi
  • Patent number: 4959053
    Abstract: This invention relates to an intravenous drip, which has a dripping vessel, a cap, a valve, a connecting tube and a pointed bar been inserted in the solution bottle letting the solution in said bottle to flow down through a solution passage of said bar into said dripping vessel, and said valve with a hollow cone to float on the solution level in said dripping vessel and to blow the flow of the solution by means of the circumferential surface of said hollow cone able to touch the upper inside rim of the connecting tube inserted in the said linking tube of the dripping vessel as the solution level therein gradually goes down.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: September 25, 1990
    Inventor: Cheng-Houng Jang
  • Patent number: 4947154
    Abstract: An alarm device for dripping injection comprising a floating barrel which vertically moves up or down according to fluid volume in the dripping liquid barrel, a touch switch and sealing means which are provided in the upper area of the lower part of dripping liquid barrel, a socket which is provided in the dripping liquid barrel lower part for connection to touch switch, and a power lead and plug provided by a separate action box or a patient room's call assembly to plug the socket. As the contained fluid is used near empty and the fluid volume in the dripping liquid barrel diminishes meantime, the floating barrel, when loosing support by the fluid volume, moves down and touches the touch switch with its own weight, thereby conducting open the separate action box or the patient room's call assembly to alarm nurses or hospital orderly to come to handle.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: August 7, 1990
    Inventor: Feng-Lin Hwang
  • Patent number: 4870987
    Abstract: A flow regulator comprises a float valve body provided in an inner container which in turn is fitted in a lower portion of an outer container. The float body has an elongated slender upper portion which is suddenly restricted at an upper side and an elongated tapered lower portion. The slender upper portion extends through a central opening of a first plate at the top end of the inner container. The tapered lower portion passes through a valve seat of a second plate placed below the first plate and extends beyond a restricted tubular bottom end of the inner container. A flexible tube is sleeved on said tubular bottom end and receives the end of the float body. By moving the flexible tube, the float body can be moved away from the valve seat. A further valve seat may be formed in the tubular bottom end of the inner container.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: October 3, 1989
    Inventor: Ton-Lin Cheng
  • Patent number: 4769007
    Abstract: Present disclosure relates to an automatic shutting-off and alarming device for dripping injection use, which comprises of a closed container, a buoyant cylinder, a ring magnet, a magnetically actuated contactor, and an alarming system. The ring magnet is furnished on the bottom end of the buoyant cylinder and the buoyant cylinder is placed into the closed container, the magnetically actuated contactor is pivotally clamped to the bottom edge of the closed container.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: September 6, 1988
    Inventor: Shun-Fa Hsu
  • Patent number: 4731060
    Abstract: This invention relates to a hydrostatic float valve for use in a fluid feed system that is capable of automatically shutting off the flow of fluid to a body cavity of a patient whenever additional or more rapid flow of said fluid would harm said patient and also relates to a fluid delivery system of the intravenous type that incorporates said hydrostatic float valve.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: March 15, 1988
    Inventor: Marc L. Catalano
  • Patent number: 4449976
    Abstract: A device for reducing the rate of flow from a reservoir as the reservoir empties requires only a single chamber having an input, for receiving fluid from a reservoir, and an output port. There is a provision for sensing fluid level in the chamber, and a separate provision for reducing the flow through the output port when fluid level in the chamber has fallen to a predetermined level. In a preferred embodiment of the invention, fluid level is sensed by a float, which, after falling to a predetermined level, actuates a plunger that reduces flow through an aperature at the bottom of the chamber.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: May 22, 1984
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventor: Dean L. Kamen