Means For Preventing Accidental Displacement Of Piston Patents (Class 604/220)
  • Patent number: 6913592
    Abstract: A disposable needleless injection device includes an integral unit that is dimensioned and arranged to be grasped in the hand of a user. The system is spring-loaded and is manufactured and shipped with the spring in a pre-cocked condition. An integral ampule is fillable by manipulation of a thrust rod/shaft which extends longitudinally through the device and is able to be grasped by a user. Once the unit is filled with a selected medication, it is held proximate the skin in order to inject the selected dosage. The unit is constructed from a maximum of eight component parts and is assembled in a matter of moments by unskilled personnel.
    Type: Grant
    Filed: March 24, 2003
    Date of Patent: July 5, 2005
    Assignee: HNS International, Inc.
    Inventor: J. Stuart Parsons
  • Publication number: 20040260248
    Abstract: The syringe is formed according to DIN ISO 11040 and has a syringe barrel (1) with a syringe head (1a) formed on one end and a grip plate (4) formed at the other open end. An elastomeric piston stopper (6) is insertable in this open end, which is movable back and forth and which has a cruciform-cross-sectioned piston rod (7) screwed into it. A stop element, which reduces the interior diameter of the syringe barrel, is provided at the open end of the syringe barrel to perform a back-stop function, i.e. to prevent unintended withdrawal of the piston stopper. For this purpose a plastic part (2) connected to the grip plate (4) is provided with snap catches (3), which snap onto the inner side of the syringe barrel (1). These snap-catches (3) prevent the piston rod (7) from being rotated out of the piston stopper and the piston stopper (6) from being withdrawn from the syringe barrel. At the same time the finger support is enlarged.
    Type: Application
    Filed: November 10, 2003
    Publication date: December 23, 2004
    Inventors: Horst Koller, Markus Steigenberger, Karl Mosimann, Thomas Kadur
  • Patent number: 6824529
    Abstract: A drug delivery device having a base member defining a skin-contacting surface, a syringe serving as a reservoir for the drug, and means for expelling drug from the syringe. The syringe is connected to the base member such that the longitudinal axis of the syringe is substantially parallel to the skin surface. A delivery needle is in communication with the syringe. The needle has an angled bend which directs the tip of the needle substantially perpendicular to the skin-contacting surface. In use, the tip of the needle is adapted to penetrate the skin of the subject.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: November 30, 2004
    Assignee: Elan Pharma International Limited
    Inventors: Joseph Gross, Gilad Lavi, Izrail Tsals
  • Patent number: 6821266
    Abstract: In a syringe, in which a needle assembly is engaged by a plunger and withdrawn into a syringe barrel for safe disposal, the plunger slides in a resilient insert secured at the proximal end of the barrel. The insert engages an annular ridge near the distal end of the plunger when the plunger, with the needle assembly attached to it, is fully withdrawn, thereby securely locking the plunger to the barrel, and reliably preventing distal movement of the plunger after the needle assembly is withdrawn into the interior of the barrel. The part of the plunger that protrudes proximally from the barrel may then be snapped off.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: November 23, 2004
    Assignee: U.S. Technology, Inc.
    Inventors: William R. Knepshield, Abrar Solatch
  • Patent number: 6808512
    Abstract: A safety syringe has a hollow barrel, a plunger, a tube, a needle hub, a spring and a plug. The hollow barrel has an outside surface, a proximal open end and a distal closed end. The plunger is mounted slidably inside the hollow barrel. The tube has a proximal open end and a distal open end and is attached longitudinally to the outside surface of the hollow barrel. The needle hub and the spring are mounted inside the tube, and the needle can extend out of the distal open end of the tube. A first through hole defined in the hollow barrel and a second through hole is defined in the tube align with each other. The needle is extended out from the distal end of the tube to take a blood sample. The used needle is retracted into the tube after use to keep people from getting injured or infected.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: October 26, 2004
    Inventors: Hsiu-Chih Lin, Jih-Hsiung Yang
  • Patent number: 6800071
    Abstract: An improved pump, reservoir and reservoir piston are provided for controlled delivery of fluids. A motor is operably coupled to a drive member, such as a drive screw, which is adapted to advance a plunger slide in response to operation of the motor. The plunger slide is removably coupled to the piston. The piston comprises a first member and a second member. The first member has an external proximate side and an external distal side. The external proximate side is adapted to contact the fluid and is made of a material having a first stiffness. The second member has a first side and a second side and is at least partially disposed within the first member. The first side of the second member is adjacent to the external proximate side of the first member and is made of a material having a stiffness which is greater than the first stiffness.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: October 5, 2004
    Assignee: Medtronic MiniMed, Inc.
    Inventors: Susan McConnell, Sheldon B. Moberg
  • Publication number: 20040153037
    Abstract: A hypodermic syringe includes a barrel, the barrel having two stop portions in the rear side, a radially compressible constraint member mounted in the barrel and stopped between the stop portions of the barrel, and a plunger holding a rubber stopper and axially movably inserted through the constraint member into the inside of the barrel, the plunger having a breaking portion, and a front stop flange, which is stopped against the constraint member upon back stroke of the plunger after the service of the syringe for enabling the user to break the breaking portion.
    Type: Application
    Filed: January 13, 2004
    Publication date: August 5, 2004
    Applicant: TAIJECT MEDICAL DEVICE CO., LTD.
    Inventor: Chin-Shu Huang
  • Patent number: 6767335
    Abstract: The invention refers to a syringe of single-use type intended for injection or lab tests with an injection needle slidable into the syringe after usage. The intention with this is to eliminate the risk for prick injuries when the syringe is handled after usage. A design of a single-use syringe such that the needle becomes kept in the interior of the syringe after usage has proved to be involved by different kinds of complications and has made the syringe complicated and expensive to manufacture. An uncomplicated and reliable syringe of the kind stated in the introduction is achieved according to the invention by the fact that the plunger (2) of the syringe is provided with a coupling device (12) designed such that in the completely pushed in position of the plunger the rear part of the injection needle (6) is coupled to the plunger (2) and follows the plunger when the plunger is withdrawn.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: July 27, 2004
    Assignee: HelgMediTech AB
    Inventor: Rolf Helg
  • Patent number: 6736794
    Abstract: A needle-stick safety syringe includes an inner tubular body, plunger, and needle extending from a distal end of said inner tubular body, an outer tubular housing concentrically and slidingly surrounding at least a portion of the inner tubular body and biased apart from the inner tubular body. A recess is defined within an interior wall surface of the outer tubular housing, and a latch attached to a distal end of the inner tubular body. The latch includes a ring-shaped collar attached to the distal end of the inner tubular body and includes a cantilevered push-stop. A portion of the cantilevered push-stop is sized to fit within the recess when the latch is sufficiently disposed within the outer tubular housing.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: May 18, 2004
    Assignee: ITG-International Technology Group, LLC
    Inventors: Dietrich W. Grabis, Mary Anne Kaehler, Kenneth Mellberg
  • Patent number: 6719735
    Abstract: A syringe and adapter combination allowing the syringe to be filled with fluid by the employment of one hand of an operator.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: April 13, 2004
    Assignee: Gammon Technical Products, Inc.
    Inventor: James H. Gammon
  • Publication number: 20040054332
    Abstract: A syringe device incorporating ridges that cause resistive changes to the movement of the syringe gasket or plunger, thereby providing user feedback as to the position and speed of plunger movement. Such user feedback may be useful in stressful situations, under poor lighting conditions or in other unfavorable circumstances. Additionally, in certain embodiments these ridges may aid in accurate dispension or allow the syringe to derive additional functionality, such as performing as a vacuum source. Ridges can be protrusions such as tabs, bubbles or continuous rings for single or repeated use or these ridges may be formed as indentations. Ridges may be formed in patterns, in various sizes and shapes or these ridges may be mixed and matched as required or desired. Ridges may also be formed from a soluble material and the resistive change may itself provide indication that the material has been substantially dissolved and dispensed.
    Type: Application
    Filed: September 18, 2002
    Publication date: March 18, 2004
    Inventor: Gary William Ferguson
  • Patent number: 6701976
    Abstract: A jig for injecting a fixed amount of insulin includes: a main fixture (1) having upper and lower sandwiching portions for sandwiching and supporting an insulin injector from both sides, at upper and lower portions on the rear surface of the insulin injector; a screw fixing piece (4) formed by extending one side of upper sandwiching portions 2 of the main fixture 1 upward; and, outside of the piece 4 for fixing an appointed quantity of screws, an injection button upper-limit position setting piece (6) whose upper portion is bent inward and which is provided with a slit (7) opened at its lower part, and the injection-button upper-limit position setting piece (6) is made freely movable up and down by screw fixation to the screw fixing piece (4) by inserting screws (8) through the slit (7).
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: March 9, 2004
    Inventor: Kenichi Toraishi
  • Patent number: 6669672
    Abstract: A one-handed hypodermic syringe is a renovated structure that allows users to push and pull the syringe by one hand. The medical personnel may place their thumbs inside the ring disposed in the distal end of the plunger and may press the concave objects disposed in the distal end of the barrel by their index fingers and middle fingers. Thus, the syringe may be held steadily, and the pull-push action of the injection manipulated with one band. The convenience for the medical personnel's use of hypodermic syringe is thereby enhanced.
    Type: Grant
    Filed: February 11, 2002
    Date of Patent: December 30, 2003
    Inventor: Wen Ying Wu
  • Patent number: 6652493
    Abstract: A syringe for use with an infusion pump, the infusion pump having a cavity for receiving the syringe. The syringe includes a syringe body, a plunger and an end cap. The syringe body has a tube that is open at a first end and transitions to a passage at a second end and a connector extending from the passage, the connector for attachment to an infusion set or tubing. The plunger is slidably mounted inside the tube and comprises a plunger tip and a plunger rod. The plunger tip has a front face that is complementarily received by the second end of the tube and a rear face, the plunger tip forming an interference fit with the tube. The plunger rod has a first end attached to the plunger tip and a second end extending outside the first end of the tube. The plunger rod has a cross-sectional shape that is complementarily received by the cavity of the infusion pump when inserted in only one direction.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: November 25, 2003
    Assignee: Animas Corporation
    Inventor: Kusal K. Das
  • Patent number: 6616640
    Abstract: A plunger anti-detachment mechanism incorporates with a syringe which includes a hollow barrel, a hollow needle held at one end of the hollow barrel, and a plunger adapted to coaxially travel through the barrel. The plunger anti-detachment mechanism includes at least a locking stopper radially extended on the barrel and at least a resilient arm, having a locking latch outwardly extended therefrom, radially extended from the plunger wherein the resilient arm is adapted to move from an unlocked position to a locked position. At the unlocked position, the locking latch is moved away from the locking stopper such that the plunger is capable of freely traveling through the barrel, and that at the locked position, the locking latch is extended to the locking stopper so as to block up an axial movement of the plunger with respect to the barrel and interlock the plunger with the barrel.
    Type: Grant
    Filed: January 7, 2002
    Date of Patent: September 9, 2003
    Inventor: Marina Ling-Ko Chen
  • Patent number: 6613024
    Abstract: A single-hand controlled syringe having a plunger slidably mounted within a barrel. The plunger and barrel are of double wall construction with the outer wall of the plunger being slidably mounted in the space between the inner and outer walls of the barrel. A spring is mounted in the space between the inner and outer walls of the plunger. By this construction and arrangement, the alignment of the plunger within the barrel is maintained; the spring is hidden from view and the syringe can be easily assembled and disassembled for cleaning.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: September 2, 2003
    Inventor: Frank V. Gargione
  • Patent number: 6610029
    Abstract: The present invention is an improved needle-less injector device for the injection of fluids into the patients body. The injector device consists of a chassis, a nozzle on one end, a section for carpules containing the fluids to be injected, a piston, a spring-element acting on the piston, a compressing-mechanism for the spring-element and a release-mechanism. The compressing-mechanism can be connected to a coupling device of a standard dental driving unit.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: August 26, 2003
    Assignee: Deutscher Zahnarzt Verlag (DZV)
    Inventor: Ygal Golan
  • Publication number: 20030153876
    Abstract: A piston stopper for a medicine injector, wherein the stopper has a stopper body with a mesh section and at least one sealing element positioned at least partly around the circumference of the stopper body, wherein at least one of the sealing element and mesh section is connected to the stopper body in a material bond. A method for manufacturing such a piston stopper is encompassed.
    Type: Application
    Filed: August 14, 2002
    Publication date: August 14, 2003
    Inventors: Fritz Kirchhofer, Michael Hirsiger, Frank Schiffmann, Hanspeter Stoller
  • Publication number: 20030130623
    Abstract: A plunger anti-detachment mechanism incorporates with a syringe which includes a hollow barrel, a hollow needle held at one end of the hollow barrel, and a plunger adapted to coaxially travel through the barrel. The plunger anti-detachment mechanism includes at least a locking stopper radially extended on the barrel and at least a resilient arm, having a locking latch outwardly extended therefrom, radially extended from the plunger wherein the resilient arm is adapted to move from an unlocked position to a locked position. At the unlocked position, the locking latch is moved away from the locking stopper such that the plunger is capable of freely traveling through the barrel, and that at the locked position, the locking latch is extended to the locking stopper so as to block up an axial movement of the plunger with respect to the barrel and interlock the plunger with the barrel.
    Type: Application
    Filed: January 7, 2002
    Publication date: July 10, 2003
    Inventor: Marina Ling-Ko Chen
  • Patent number: 6582407
    Abstract: A structural safety design for the prevention of mis-pressing plunger rod into syringe mainly designs for single-used syringes, of which set a locking socket and a safety locking tab at the plunger rod end. An obstruction is formed between the plunger rod and the flange of hollow fluid chamber before the safety locking tab is pressed into the locking socket, so that the plunger rod can not be thoroughly pressed into the hollow cylinger. The invention, therefore, provides with a safety structure that effectively prevents from the unable-to-use problem of a syringe resulting from the plunger rod is mis-pressed into the hollow cylinder engaging with other components inside before the fresh syringe being used.
    Type: Grant
    Filed: August 16, 2002
    Date of Patent: June 24, 2003
    Assignee: M.K. Meditech Co., Ltd.
    Inventor: Pi-Chang Lo
  • Publication number: 20030093037
    Abstract: A hypodermic syringe includes a housing (1), a plunger (2) with an associated piston (3), a needle carrier (4) with a needle (5) covered by a removable sheath (6). A vacuum is formed between the plunger (2) and piston (3). When the plunger (2) is operated, the piston (3) engages the needle carrier and a coupling between the plunger and piston is broken, so that the vacuum withdraws the piston (3) into the plunger (2), together with the needle carrier, so as to retract the needle into the housing (1). The needle carrier (4) is rectangular in cross-section and is received in a corresponding rectangular sectioned housing opening (1.2) in order to prevent rotation of the needle carrier relative to the housing. This facilitates removal of the needle sheath, without the risk of a needle stick injury prior to use of the syringe, and allows for the separate and external fitting of a needle.
    Type: Application
    Filed: October 8, 2002
    Publication date: May 15, 2003
    Inventors: David W. Parker, Colin H. Burgess
  • Patent number: 6544233
    Abstract: A pre-filled syringe includes an outer cylinder having a sealed nozzle, and an inner cylinder movable forward and rearward in the outer cylinder and forming a first space between the inner cylinder and an inner front end of the outer cylinder. A first gasket is slidably accommodated in the inner cylinder in a liquid-tight state, a second gasket is accommodated slidably in the inner cylinder in a liquid-tight state and is located rearward from the first gasket to form a second space between the first and second gaskets, and a plunger is attached at a rear end of the second gasket. A third gasket is installed near the front end of the inner cylinder to be slidable in a liquid-tight state between the inner and outer cylinders. A first medicine is stored in the first space and a second medicine is stored in the second space.
    Type: Grant
    Filed: October 18, 2000
    Date of Patent: April 8, 2003
    Assignee: Terumo Kabushiki Kaisha
    Inventors: Hideo Fukui, Masato Nishimura
  • Publication number: 20030055385
    Abstract: A structure is disclosed for holding medical sharp instruments within covers. Contrary to the prior art, the medical sharp instruments are held within the cover, both during use and non-use positions. Most preferably, some locking structure is provided which locks the medical sharp instrument within the cover at both the use and non-use positions.
    Type: Application
    Filed: September 18, 2001
    Publication date: March 20, 2003
    Inventors: Paul Schooler, Rottman Michael
  • Patent number: 6533756
    Abstract: A single-use syringe having a barrel and a plunger is provided. The plunger at least one vane, and the vane is provided with serrations or ratchet teeth. The serrations each have a vertical rear wall and a sloped top edge. A barbed clip is provided that fits on the serrated vane. The barbs on the clip engage the inner wall of the barrel. When the plunger is initially withdrawn, the barbs of the clip engage the inner wall of the barrel and the clip remains in position with respect to the barrel. Because the tops of the serrations are sloped, the ridged/serrated vane of the plunger passes easily under the clip. When the plunger is re-inserted into the barrel, the clip engages one of the vertical rear walls of the serrations and moves along with the plunger deeper into the barrel. If one attempts to re-retract the plunger, the distal wall of the plunger strikes the clip, and the clip is immobilized because the barbs engage the inner wall of the barrel.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: March 18, 2003
    Assignee: Univec, Inc.
    Inventors: Joel Schoenfeld, Randy Cohen
  • Patent number: 6530903
    Abstract: A safety syringe comprising a casing having a neck and a plunger having a distal portion, a weak portion, and a coupling portion covered by a hollow stopper having a membrane. The plunger is channeled in the casing and is moveable between an extended position and a compressed position. A needle holder, in the neck, contains a distally facing arrowhead and a proximally facing needle. Moving the plunger from an extended position to a compressed position, causes the arrowhead to puncture the membrane and engage the coupling portion. If the plunger is returned to the extended position, the needle is drawn into the casing and the distal portion of the plunger can be removed. If the plunger is re-compressed, the needle encounters a wall in the neck preventing the needle from exiting the casing. The syringe is easy to manufacture and prevents manufacturing burrs from being injected into patients.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: March 11, 2003
    Inventors: Xiping Wang, Bizhu Zhang, Xiaopeng Wang
  • Patent number: 6527749
    Abstract: An applicator is provided for dispensing a first and a second protein solution to form a biological adhesive where the solutions can be deflected by a deflection assembly during dispensing for the adhesive to cover a broad or limited area. The applicator includes a housing having a housing head for enclosing therein a first reservoir containing a first component, and a second reservoir containing a second component. The first and second components are preferably fibrinogen and thrombin which intermix with water to form the first and second protein solutions, respectively. The housing further includes an elongated body portion defining a longitudinal axis for enclosing therein a conduit assembly having a first and a second conduit in communication with the first and second reservoir, respectively. The solutions intermix on an application site to form a fibrin sealant. In an alternate embodiment, the applicator includes two valves.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: March 4, 2003
    Assignee: United States Surgical Corporation
    Inventors: Mark S. Roby, Ernie Aranyi, Richard Yagami, H. Jonathan Tovey
  • Publication number: 20030032928
    Abstract: A pre-filled syringe assembly is achieved which prevents, with a strong force, a stopper provided therein from being pulled out, and wherein the stopper can be prevented from being scratched.
    Type: Application
    Filed: August 29, 2002
    Publication date: February 13, 2003
    Inventors: Morihiro Sudo, Shigeru Sugihara, Miyo Sugihara, Yoshirou Watanabe
  • Publication number: 20030014019
    Abstract: A medical device includes a hollow needle having a distal end and a proximal end, and a substantially flexible storage chamber for storing a medical preparation. The storage chamber is disposed spaced apart from the proximal end of the needle. The medical device further includes a needle shield, means operable to advance the storage chamber toward the proximal end of the needle and enabling fluid communication thereof with the medical preparation in the storage chamber, and means operable to decommission the needle substantially immediately using the needle shield after injecting the medical preparation with the needle.
    Type: Application
    Filed: June 19, 2002
    Publication date: January 16, 2003
    Inventor: V. C. Saied
  • Patent number: 6494863
    Abstract: A retracting syringe of one use has a plunger comprising a handle portion and a needle retention portion forward of the handle portion. A positive locking structure in the syringe barrel ensures the syringe is not reused. In one embodiment, the positive locking structure is a stop in the syringe barrel. The handle portion separates after one use and is removed from the syringe. In a second embodiment, the handle portion has a plurality of stepped serrations and the positive locking structure is a clip which is movable with respect to both the handle portion and the barrel. In a third embodiment, the positive locking structure is a clip fixed in an enlarged back opening of the barrel with springing points which are protected from a plurality of stepped serrations on the handle portion by a sliding collar. This one use feature can be applied to a nonretracting syringe.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: December 17, 2002
    Assignee: Retractable Technologies, Inc.
    Inventors: Thomas J. Shaw, Judy Zhu
  • Publication number: 20020161340
    Abstract: The syringe includes an adapter threaded into the distal end of the barrel and a plunger axially movable within the barrel. A stop and catch cooperate between the adapter and barrel end to prevent rotation of the adapter. Adapter and plunger engagement structures are carried by the plunger and adapter, respectively, to enable joint rotation of the plunger and adapter relative to the barrel to unthread the adapter from the barrel end and withdraw the adapter and needle carried thereby jointly with the plunger into the interior of the barrel. The engagement structures also include an element for engaging the catch in response to axial movement of the plunger to release the adapter for rotational movement relative to the barrel end and subsequent withdrawal of the adapter and needle carried thereby into the barrel.
    Type: Application
    Filed: April 26, 2001
    Publication date: October 31, 2002
    Inventor: Fraser R. Sharp
  • Patent number: 6468250
    Abstract: A dual-chamber safety hypodermic syringe. The syringe includes a barrel having a medicine chamber, a needle chamber, and a guide hole connected between the chambers. The needle assembly is moved in and out of the needle chamber between the extended position where an inlet on a neck of the needle assembly is disposed in communication with the guide hole for enabling liquid medicine to be squeezed out from the medicine chamber through the needle cannula of the needle assembly, and the received position where the needle assembly is safely received inside the needle chamber and kept from sight.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: October 22, 2002
    Inventor: Kuo-Chen Yang
  • Publication number: 20020128609
    Abstract: A disposable hypodermic syringe comprises an outer barrel, an inner barrel slidingly disposable in the outer barrel, a hypodermic needle disposed axially at the front end of the outer barrel so as penetrate its front end wall and being held, at its rear end, by the front end wall of the inner barrel, and a plunger which is slidingly disposable in the inner barrel. The outer barrel includes elements for interlocking with the inner barrel when the inner barrel is in a fully inserted position. The plunger includes release elements for releasing the inner barrel from the outer barrel while interlocking with the inner barrel so as to allow the inner barrel and the plunger to be withdrawn in combination with the hypodermic needle for a distance sufficient to displace the needle into a space formed between the outer barrel and the inner barrel.
    Type: Application
    Filed: March 7, 2001
    Publication date: September 12, 2002
    Applicant: Jk Medicinkonsult Forvaltning AB
    Inventors: Johan Koch, Joakim Jemseby
  • Patent number: 6371941
    Abstract: A prefilled syringe has a tubular body which has an open front end and an open rear end. A front assembly is mounted on an outer periphery of a front end portion of the tubular body. A finger grip is mounted on an outer periphery of a rear end portion of the tubular body. A front sealing member is provided in the tubular body so as to be disposed forwardly of injection liquid and a rear sealing member is provided in the tubular body so as to be disposed rearwards of the injection liquid. A plunger rod is provided so as to be movable in the tubular body. A temporary stop member temporarily stops the plunger rod through retention of the temporary stop member by the finger grip such that the rear sealing member is temporarily stopped at a predetermined position of the tubular body. A retention canceling member cancels the retention of the temporary stop member by the finger grip without moving the plunger rod.
    Type: Grant
    Filed: September 10, 1998
    Date of Patent: April 16, 2002
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Masahiko Kato, Jiichi Arai, Makoto Kakiuti
  • Patent number: 6368306
    Abstract: A syringe comprises a barrel (1) having a plunger (7) in slidable and sealing engagement therewith. In order to provide an autodestruct system, so that the syringe can be used once only, being rendered disabled after one normal use, the barrel (1) has means interrupting the cylindrical surface of its inner wall in the form of grooves (10, 11) or a projection (29), and the plunger (7) has a locking means (17, 20) which operates on engagement with a groove (10, 11) or projection (29) on withdrawal of the plunger (7) to prevent further withdrawal movement. The locking means (17, 20) is provided on the head of the plunger (7) adjacent an elastomeric sealing cap (15). The locking means may comprise a pair of flukes (17) or a cross-shaped disc (20).
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: April 9, 2002
    Inventor: Marc Koska
  • Publication number: 20020016572
    Abstract: A stabilizer for a piston that strengthens the piston when higher dispensing volumes and/or pressures are involved. The stabilizer intimately contacts the piston along the radius of the piston to prevent distortion of the piston thereby preventing the fluid being dispensed from flowing around the piston destroying repeatability, accuracy and contaminating the driving mechanisms. The stabilizer also prevents the piston from cocking that may make the dispensing inaccurate and non-repeatable. The stabilizer may be of substantially any material from metals to any of the plastics suitable for maintaining its structural integrity under the pressures and forces involved.
    Type: Application
    Filed: July 10, 2001
    Publication date: February 7, 2002
    Inventor: W. Scott Beebe
  • Patent number: 6221046
    Abstract: A multi-use medication dispensing pen made of a plastic material that is recyclable after the contents of the medication cartridge have been exhausted. The pen is made of a minimal number of parts, which include a housing, a dial mechanism, a generally cylindrical button assembly located within the proximal end of the dial mechanism, an internally threaded nut, and an externally threaded leadscrew. The pen is arranged so that the dial mechanism must be rotated to the zero-dose position prior to setting a dose. The pen includes a lockout mechanism that prevents the dial mechanism from being inadvertently depressed during dosing. The pen further includes a mechanism that limits the maximum dosage that can be dialed up and a mechanism that prevents the user from dialing up a dosage greater than that remaining in the cartridge.
    Type: Grant
    Filed: July 9, 1996
    Date of Patent: April 24, 2001
    Assignee: Eli Lilly and Company
    Inventors: Andrew Burroughs, Dave Hixson, Andrew Hodge
  • Patent number: 6206859
    Abstract: A self-aligning reinforced plunger rod and a non-elastomeric plastic plunger insert assembly for use with an elastomeric plunger in a cartridge or syringe barrel, the plunger rod having a first, second, third and fourth sides, a distal end with an end disc, a proximal end with a thumb rest, a central reinforcing disc at the midpoint between the end disc and the thumb rest, and a plunger rod tip integral with the end disc and having a neck portion and a ball portion for engagement with a cavity in the non-elastomeric plastic plunger insert.
    Type: Grant
    Filed: April 10, 2000
    Date of Patent: March 27, 2001
    Assignee: Bracco Diagnostics, Inc.
    Inventors: John J. Niedospial, Jr., Ernest Balestracci
  • Patent number: 6190362
    Abstract: Dimensionally stable plunger rod for use with a plunger in a cartridge or syringe barrel for manual or power-assisted withdrawal of fluid from a site or expelling fluid from the cartridge or syringe barrel having: a plunger rod body with a distal and a proximal end; an end disc at the distal end; a threaded member integral with the end disc designed to engage a plunger; a thumb rest at the proximal end; a central disc at the mid point between the end disc and the thumb rest to provide additional reinforcement to the plunger rod; four longitudinal radially extending rectangular vanes connected to the end disc at the distal end, to the central disc at the mid point, and to the thumb rest at the proximal end; two pairs of longitudinal radially extending reinforcing vanes forming two triangular configurations with one of the longitudinal radially extending rectangular vanes on one side of the plunger rod body; and two pairs of longitudinal radially extending reinforcing vanes forming two triangular config
    Type: Grant
    Filed: April 3, 2000
    Date of Patent: February 20, 2001
    Assignee: Bracco Diagnostics, Inc.
    Inventor: Ernest Balestracci
  • Patent number: 6190363
    Abstract: A self-aligning plunger rod and a non-elastomeric plastic plunger insert assembly for use with an elastomeric plunger in a cartridge or syringe barrel for manual or power-assisted withdrawing of fluid from a site or expelling fluid from the cartridge or syringe barrel.
    Type: Grant
    Filed: January 24, 2000
    Date of Patent: February 20, 2001
    Assignee: Bracco Diagnostics, Inc.
    Inventors: Mark E. Gabbard, John J. Niedospial, Jr., Timothy J. Gabbard
  • Patent number: 6165153
    Abstract: A single-use syringe assembly is provided and includes an elongated syringe barrel with a plunger assembly disposed therein. The plunger assembly includes an elongated plunger rod having a plunger tip located distally. The plunger tip contains a locking detent disposed a the distal end of the tip. The syringe barrel has a nozzle at the substantially closed distal end, the nozzle adapted to conform to the plunger tip. The distal end of the nozzle contains an annular inward biased ring adapted to mate with the locking detent of the plunger tip. Upon usage of the syringe and application of force to apply the liquid, the locking detent is irreversibly mated with the nozzle inwardly biased ring, thereby preventing reuse of the syringe assembly.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: December 26, 2000
    Assignee: SafeGard Medical Limited
    Inventor: James S. Kashmer
  • Patent number: 6142978
    Abstract: A self-aligning reinforced plunger rod and a non-elastomeric plastic plunger insert assembly for use with an elastomeric plunger in a cartridge or syringe barrel, the plunger rod having a first, second, third and fourth sides, a distal end with an end disc, a proximal end with a thumb rest, and a plunger rod tip integral with the end disc and having a neck portion and a ball portion for engagement with a cavity in the non-elastomeric plastic plunger insert. Connecting the end disc and thumb rest there are: four longitudinal radially extending rectangular vanes spaced about 90.degree.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: November 7, 2000
    Assignee: Bracco Diagnostics, Inc.
    Inventors: John J. Niedospial, Jr., Ernest Balestracci
  • Patent number: 6123688
    Abstract: A pre-filled injection device having a retractable needle with a sharpened tip for penetrating the skin of a patient for administering medicinal fluids is provided. The pre-filled injection device of the present invention allows the needle to be manually retracted, thereby reducing the risk of transmission of various pathogens, most notably human immune virus (HIV), to infected personnel, due to an inadvertent needle stick. The present pre-filled injection device has a hollow housing which receives a pre-filled cartridge containing medicinal fluids. A needle retainer initially holds a needle projecting forwardly from the hollow housing. The rear end of the needle pierces the pre-filled cartridge when sufficient pressure is applied to the end of the pre-filled cartridge to advance it in the forward direction. A plunger is slidably displaceable within the housing. A latch member is operable in a latched position to prevent forward movement of the plunger.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: September 26, 2000
    Assignee: MDC Investment Holdings, Inc.
    Inventors: Michael J. Botich, Thor R. Halseth
  • Patent number: 6086568
    Abstract: An improved syringe plunger rod for a retracting needle syringe is illustrated having a plunger rod with inner and outer members and a retaining ring. The retaining ring restricts movement between the inner and outer members until the ring makes contact with the proximal end of the retracting needle syringe and further distal force is applied to the inner member. Once disengaged, the inner member moves relative to the outer member to activate the retractable needle syringe. One advantage of the improved plunger rod is that it reduces the probability of premature activation of the retractable needle syringe. In addition, the improved plunger rod assists in the prevention of re-use of the syringe.
    Type: Grant
    Filed: October 15, 1999
    Date of Patent: July 11, 2000
    Assignee: Becton Dickinson and Company
    Inventor: Richard Caizza
  • Patent number: 6077247
    Abstract: An injection device has a two part barrel. The forward part (10) telescopes into the rear part (3) and within the barrel a capsule (1) with a needle (2) at its forward end is initially held by a trigger (11) formed integrally with the forward part (10) so that the needle (2) does not project. The trigger (11) is inoperable at this stage, being inaccessible because of the telescopic overlap. A spring (20) acts on a plunger at the rear of the capsule. When the overlap is increased, the trigger (11) becomes accessible through a slot (7), and when it is operated the capsule (1) is released for the spring (20) to shoot it forwards and eject the dose through the now projecting needle (2). The capsule (1) may have a two part dose and its mixing may then be effected by the spring (20), fully compressed after the overlap increase, urging the plunger forwards.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: June 20, 2000
    Assignee: Owen Mumford Limited
    Inventors: Jeremy Marshall, David Danvers Crossman
  • Patent number: 6024710
    Abstract: An assembly for the collection of a patient's blood specimen comprises an elongate needle holder, a blood collection tube, and a cap closing the blood collection tube. The needle holder supports a blood extracting needle through a closed end thereof. The blood collection tube is insertable into the interior of the needle holder so as to collect blood. The cap has a membrane which is puncturable by the needle upon insertion of the blood collection tube into the interior of the needle holder. The cap includes a deflectable member extending therefrom for engagement with the cylindrical wall of the needle holder so as to frictionally resist longitudinal movement of the tube within the tube holder.
    Type: Grant
    Filed: September 30, 1998
    Date of Patent: February 15, 2000
    Assignee: Becton Dickinson and Company
    Inventor: Henry F. Miller
  • Patent number: 5964736
    Abstract: A closed delivery system is described for the handling of injectable biological products and vaccines used in the treatment and prevention of livestock diseases. This system embodies a multidose prefilled disposable cartridge and a metered pistolgrip syringe body. The cartridge is breech loaded into the syringe body and the product is dispensed from the cartridge by a unique drag link mechanism as a means for advancing the plunger rod and forcing the vaccine from the cartridge into the flesh of the animal being treated. Each prefilled cartridge is disposed of after it is emptied and no cleaning is required. A color coding system between the multidose, prefilled, disposable cartridges and the syringe bodies insure that proper dosages are given and that products are not mixed up or confused by the technicians administering the products.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: October 12, 1999
    Inventor: Donovan R. Lane
  • Patent number: 5931813
    Abstract: A retractable and destructible safety syringe including a syringe barrel, a plunger, a needle holder, a needle, capture elements formed on the needle holder or the plunger and a one-way movable detent formed on the plunger or the needle holder. When a piston of the plunger is fully depressed within the syringe barrel, the detent can be easily firmly engaged with the capture elements, whereby the needle holder and the needle can be together pulled back into the barrel. In addition, when the fully retracted plunger is depressed again, the tip of the needle is pressed against a shoulder section of the barrel, being bent and destroyed thereby. Sealing fixing rings are formed on outer wall of the needle holder and inner wall of the needle holder cavity, serving to sealably and separably engage the needle holder with the needle holder cavity. A latch plate is disposed between the barrel and the plunger to prevent the plunger from being pushed to latch the capture elements to the detent by mistake.
    Type: Grant
    Filed: December 26, 1997
    Date of Patent: August 3, 1999
    Inventor: Wen-Neng Liu
  • Patent number: 5891052
    Abstract: A diagnostic syringe actuator device for use in combination with a syringe in the removal of tissue, fluid and/or cells for the diagnosis of pathological processes wherein the syringe includes a hollow syringe body having a longitudinally movable syringe plunger at least partially disposed therein with a probe needle attached to the distal end portion comprising a hollow retractor tube having a longitudinally movable retractable piston disposed therein, a longitudinally movable syringe plunger sabot disposed within the hollow retractor tube, a sabot lock mechanism selectively movable between a locked and unlocked position disposed to engage the syringe plunger sabot when in the locked position to maintain the syringe plunger and the syringe plunger sabot in the advanced position and to disengage the syringe is plunger sabot when moved to the unlocked position such that the syringe plunger sabot and the syringe plunger move from the advanced position when the retractable piston has been at least partially retr
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: April 6, 1999
    Inventor: Paul L. Simmons
  • Patent number: 5814017
    Abstract: A single-use syringe assembly is provided and includes an elongated syringe barrel with a plunger assembly disposed therein. The plunger assembly includes an elongated plunger rod having a plunger tip located distally. The plunger tip contains a locking detent disposed a the distal end of the tip. The syringe barrel has a nozzle at the substantially closed distal end, the nozzle adapted to conform to the plunger tip. The distal end of the nozzle contains an annular inward biased ring adapted to mate with the locking detent of the plunger tip. Upon usage of the syringe and application of force to apply the liquid, the locking detent is irreversibly mated with the nozzle inwardly biased ring, thereby preventing reuse of the syringe assembly.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: September 29, 1998
    Assignee: SafeGard Medical Products, Inc.
    Inventor: James S. Kashmer
  • Patent number: 5803918
    Abstract: The syringe for medicinal purposes features a syringe barrel (1), one end of which is formed as an adapter (2) for a cannula or a closure (3), e.g., in the form of a tip cap, and of a plunger (4), arranged within the syringe barrel (1), and movable by a piston rod (5). At the end of the syringe barrel (1) facing away from the adapter (2), a plunger brake (6) is arranged, which is formed by a rest piece surrounding the syringe barrel (1) and connected removably to it. The rest piece has a projection extending into the lumen of the syringe barrel (1), which forms a stop for the side of the plunger (4) away from the adapter (2).
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: September 8, 1998
    Assignee: Becton Dickinson and Company
    Inventors: Helmut Vetter, Thomas Otto, Eugen Frasch, Ralf Bitdinger