Diameter Of Piston Selectively Adjustable Patents (Class 604/219)
  • Patent number: 9345842
    Abstract: A syringe includes a body for receiving a medicament and a plunger movably connected to the syringe body. The plunger is moved with respect to the syringe body to draw in and dispense the medicament. A plurality of dose setting indicators are disposed on the plunger. The plunger is rotated outwardly from the syringe body to draw medicament into the syringe body. The plunger can be pushed or rotated into the syringe body to dispense the medicament.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: May 24, 2016
    Assignee: Becton, Dickinson and Company
    Inventors: Lawrence H. Chanoch, John B. Wilson
  • Patent number: 8821440
    Abstract: An injection device has a dispensing chamber housing, a plunger, and a temperature control device. The dispensing chamber housing has a first part and a second part. The first part is thermally coupled to a needle. The second part is thermally coupled to the first part. The second part has an inner surface and an outer surface. The inner surface partially defines a dispensing chamber for holding a quantity of a substance. The plunger is engaged with an inner surface of the dispensing chamber housing, is capable of sliding in the dispensing chamber housing, and is fluidly sealed to the inner surface of the dispensing chamber housing. The temperature control device at least partially surrounds the dispensing chamber housing and is capable of altering a temperature of the substance in the dispensing chamber. The second part has a greater thermal coefficient than the first part.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: September 2, 2014
    Assignee: Alcon Research, Ltd.
    Inventors: Robert Sanchez, James Foster, Cesario Dos Santos
  • Patent number: 8574201
    Abstract: A fluid syringe of the type used with fluid infusion devices is presented here. The fluid syringe generally includes a barrel, a piston, and a check valve seal. The barrel has an interior wall and a sealed main fluid chamber. The piston is slidably coupled within the barrel, and the piston has a piston seal forming an interference fluid seal against the interior wall. The check valve seal is coupled to the piston, and it is located between the piston seal and the main fluid chamber. The check valve seal forms an interference fluid seal against the interior wall when the piston is unloaded, and it disengages the interior wall to allow gas flow from the main fluid chamber toward the piston seal when the piston is loaded.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: November 5, 2013
    Assignee: Medtronic Minimed, Inc.
    Inventors: Sarnath Chattaraj, Poonam S. Gulati, Lance P. Hoffman, Kiem Dang
  • Publication number: 20130281941
    Abstract: Flush syringe assemblies capable of creating pulsatile movement of the plunger rod as it moves in the distal direction within a syringe barrel, while preventing overpressurization of the cathether are provided. An exemplary flush syringe assembly includes a syringe barrel with a first pulsing element and a chamber with flush solution, a plunger rod with a stopper and a second pulsing element that interacts with the first pulsing element to provide an engagement force that causes pulsatile movement of the plunger rod and a thumb press slidably attached to the plunger rod with a pulse control element. The pulse control element is compressible to create a compression force that is greater than the engagement force of the first pulsing element and the second pulsing element.
    Type: Application
    Filed: April 26, 2013
    Publication date: October 24, 2013
    Inventors: Anthony J. Kosinski, Girum Yemane Tekeste, Nichola Charles
  • Patent number: 8535278
    Abstract: An extendible plunger rod for use with a syringe is provided. Example plunger rods may include an outer plunger rod with a proximal end and a distal end, the outer plunger rod having an inner cavity; an inner plunger rod, housed at least partially within the inner cavity of the outer plunger rod; a compression spring disposed within the inner cavity of the outer plunger rod and between the proximal end of the outer plunger rod, and the inner plunger rod, the compression spring configured to exert force tending to push the inner plunger rod in a direction distal to the outer plunger rod; and a locking mechanism, the locking mechanism configured to prevent movement of the inner plunger rod relative to the outer plunger rod while both the inner and outer plunger rods are depressed into a syringe body, until the outer plunger rod has been depressed at least a first predetermined distance into the syringe body.
    Type: Grant
    Filed: November 11, 2010
    Date of Patent: September 17, 2013
    Assignee: Allergan, Inc.
    Inventor: Christopher S. Mudd
  • Patent number: 8475415
    Abstract: A stopper adapted for attachment with a plunger rod for use within a syringe barrel is disclosed. The stopper includes a main body defining an open rearward end and a closed front end. The open rearward end is adapted to receive a front forward end attachment portion of the plunger rod. The stopper also includes a core member integrally formed with said main body adjacent the closed front end. The core member includes a nose portion having a profile adapted to create a positive seal with an outlet opening of such syringe barrel.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: July 2, 2013
    Assignee: Becton, Dickinson and Company
    Inventors: Eric Schiller, Michael V. Quinn, Johanna Torres, E Guan, Anthony Economou, Gang Ju
  • Patent number: 8409150
    Abstract: Ampoules for dispensing flowable substances and metering systems incorporating the same are described herein. An ampoule for a flowable substance includes an ampoule body comprising an interior space for receiving the flowable substance and an inner circumferential surface having a guide region and a sealing region. A piston may be disposed in the interior space of the ampoule body such that the piston is slidably displaceable along a direction of displacement. The piston includes at least one sealing element for forming a seal with the inner circumferential surface in a contact zone on the outer circumference of the sealing element. The sealing element has a first compression state when the contact zone is in the guide region and a second compression state when the contact zone is in the sealing region. A second blocking device prevents movement of the contact zone from the sealing region to the guide region.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: April 2, 2013
    Assignee: Roche Diagnostics International AG
    Inventors: Ruedi Zihlmann, Ronny-Patric Horisberger, Daniel Fehlmann
  • Patent number: 8394068
    Abstract: Syringe assemblies for use in flush applications are provided. Syringe assemblies according to one aspect of the present invention include a plunger rod and a syringe barrel that incorporate one or more pulsing elements on the plunger rod or barrel that are rotatable to create pulsatile movement or continuous and unimpeded movement a plunger rod within a syringe barrel. One or more embodiments pertain to syringe assemblies permit both pulsatile movement of the plunger rod within the barrel and continuous and unimpeded movement of the plunger rod in the distal direction along substantially the entire length of the syringe barrel upon application of force to the plunger rod in only the distal direction. Methods of flushing a catheter are also provided.
    Type: Grant
    Filed: July 9, 2010
    Date of Patent: March 12, 2013
    Assignee: Becton, Dickinson and Company
    Inventors: Anthony J. Kosinski, Adam Zerda, Girum Yemane Tekeste
  • Patent number: 8308726
    Abstract: A system to minimize fluid turbulence inside a tissue cavity during endoscopic procedures. A body tissue cavity of a subject is distended by continuous flow irrigation using a solenoid operated pump on the inflow side and a positive displacement pump, such as a peristaltic pump, on the outflow side, such that the amplitude of the pressure pulsations created by the outflow positive displacement pump inside the said tissue cavity is substantially dampened to almost negligible levels. The present invention also provides a method for accurately determining the rate of fluid loss into the subject's body system during any endoscopic procedure without utilizing any deficit weight or fluid volume calculation, the same being accomplished by using two fluid flow rate sensors. The present invention also provides a system of creating and maintaining any desired pressure in a body tissue cavity for any desired cavity outflow rate.
    Type: Grant
    Filed: September 1, 2005
    Date of Patent: November 13, 2012
    Inventors: Atul Kumar, Alka Kumar
  • Patent number: 8197451
    Abstract: Ampoules for dispensing flowable substances and metering systems incorporating the same are described herein. An ampoule for a flowable substance includes an ampoule body comprising an interior space for receiving the flowable substance and an inner circumferential surface having a guide region and a sealing region. A piston may be disposed in the interior space of the ampoule body such that the piston is slidably displaceable along a direction of displacement. The piston includes a one sealing element for forming a seal with the inner circumferential surface in a contact zone on the outer circumference of the sealing element. The sealing element has as first compression state when the contact zone is in the guide region and a second compression state when the contact zone is in the sealing region. A second blocking device prevents movement of the contact zone from the sealing region to the guide region.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: June 12, 2012
    Assignee: Roche Diagnostics International AG
    Inventors: Ruedi Zihlmann, Ronny-Patric Horisberger, Daniel Fehlmann
  • Patent number: 8007475
    Abstract: A flush syringe assembly comprises a barrel including a cylindrical side wall having an inside surface defining a chamber for retaining fluid, an open proximal end and a distal end including an elongate tip extending distally therefrom having a passageway in fluid communication with the chamber. A plunger including an elongate body portion has a stopper at its distal end. The stopper is slidably positioned in fluid-tight engagement with the inside surface of the barrel for driving fluid out of the chamber. The distal end of the stopper is configured to collapse while fluid is being driven though the passageway through motion of a plunger and to continue to drive fluid through the passageway after motion of the plunger has stopped.
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: August 30, 2011
    Assignee: Becton, Dickinson and Company
    Inventor: Anthony J. Kosinski
  • Publication number: 20110196313
    Abstract: An extendible plunger rod for use with a syringe is provided. Example plunger rods may include an outer plunger rod with a proximal end and a distal end, the outer plunger rod having an inner cavity; an inner plunger rod, housed at least partially within the inner cavity of the outer plunger rod; a compression spring disposed within the inner cavity of the outer plunger rod and between the proximal end of the outer plunger rod, and the inner plunger rod, the compression spring configured to exert force tending to push the inner plunger rod in a direction distal to the outer plunger rod; and a locking mechanism, the locking mechanism configured to prevent movement of the inner plunger rod relative to the outer plunger rod while both the inner and outer plunger rods are depressed into a syringe body, until the outer plunger rod has been depressed at least a first predetermined distance into the syringe body.
    Type: Application
    Filed: November 11, 2010
    Publication date: August 11, 2011
    Applicant: ALLERGAN, INC.
    Inventor: Christopher S. Mudd
  • Patent number: 7955309
    Abstract: A syringe plunger/jacket assembly may comprise a flexible jacket attached to a rigid plunger. The jacket may comprise at least two sealing rings (front and rear) that prevent fluid from leaking out of the rear of the barrel during injection of fluid from the syringe. The rear sealing ring may not contact or seal the interior surface of the syringe barrel in an unloaded state. In the loaded state, when force is applied in the direction of the forward discharge end of the syringe, pressure is created on the jacket. This condition causes the rear seal to expand and contact and/or seal the interior surface of the syringe barrel.
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: June 7, 2011
    Assignee: Coeur, Inc.
    Inventor: J. Michael Cude
  • Patent number: 7913881
    Abstract: A piston assembly for use in a viscous material dispenser is disclosed. The assembly has a main body with an axial bore for receipt of a push rod. The body has a face including an annular recess and an endless lip surrounding the recess. A camming washer is disposed at least in part in the recess. The washer includes a perimeteral camming surface engageable with the lip. The body and washer are connected together for limited relative axial movement when the piston assembly is advanced against material in a cartridge to dispense such material. The relative movement is effective to cause the camming surface to force the lip outwardly into tight engagement with a wall of such a cartridge.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: March 29, 2011
    Assignee: Meritool LLC
    Inventor: Timm Herman
  • Publication number: 20110046569
    Abstract: A syringe assembly includes a syringe barrel having an exterior surface, an inside surface defining a chamber, an open proximal end, a distal end, and an outlet disposed adjacent the distal end in fluid communication with the chamber; and a plunger assembly disposed at least partially within the syringe barrel. The plunger assembly includes an elongated plunger rod and a plunger head. The elongated plunger rod is associated with the plunger head to move the plunger head within the chamber of the syringe barrel through an injection cycle. The plunger rod is adapted to move from a collapsed position extending alongside the exterior surface of the syringe barrel to an extended position engaging the plunger head to move the plunger head through the injection cycle.
    Type: Application
    Filed: August 20, 2010
    Publication date: February 24, 2011
    Applicant: BECTON DICKINSON FRANCE S.A.S.
    Inventors: Chee Leong Lum, Eric Schiller
  • Publication number: 20080221529
    Abstract: A syringe having a plunger lock, the syringe comprising a syringe body having an open rear end, a plunger lock provided adjacent the open rear end, the plunger lock comprising at least one catch member having a portion extending partially into the open rear end of the syringe body and adapted to catch a portion of the plunger when the plunger has been pushed to the front of the syringe barrel, the plunger having a front end formed with a seal, and a rear end, and a projection adjacent the rear end which can ride underneath the at least one catch member when the plunger is inserted into the syringe barrel but which catches against the catch member upon attempted retraction of the plunger from the syringe barrel.
    Type: Application
    Filed: March 5, 2007
    Publication date: September 11, 2008
    Inventor: Bruce L. Kiehne
  • Publication number: 20040243067
    Abstract: Danger from pricks by contaminated hypodermic needles is reduced by the configuring of a family of single diameter and multiple diameter syringes that accommodate conventional hypodermic needles but also a variety of universal needle-based guards, shields, and safety needles. The family of syringes has as a common property among all the members of the family—a standardized diameter of that portion of the syringe barrel adjacent the needle. The portion of the syringe barrels in the family having the standardized diameter can accommodate universal safety needles regardless of the volume of the syringe.
    Type: Application
    Filed: February 3, 2004
    Publication date: December 2, 2004
    Inventor: Wilmer L. Sibbitt
  • Patent number: 6585700
    Abstract: A mounting member for attaching a front-loading syringe to a powered injector is disclosed. The present invention may also include a plunger that has a two-piece molded core portion that is readily attachable to a plunger drive member of a powered injector. The plunger core may also be equipped with an anti-cocking flange to prevent the plunger from being axially misaligned within the syringe body which could result in fluid leakage between the plunger and the syringe body. An alignment flange may also be provided on the plunger to assist with the proper insertion of the plunger into the syringe during the assembly process. A method of manufacturing a syringe plunger is also disclosed. The present invention further includes a sleeve for clampingly engaging a heating blanket to the outer surface of a syringe.
    Type: Grant
    Filed: October 5, 2000
    Date of Patent: July 1, 2003
    Assignee: Medrad, Inc.
    Inventors: Mark Trocki, Michael J. Masters
  • Publication number: 20010018575
    Abstract: An injection syringe for injecting a fluid into the arterial, venous, muscular or cavity structures of a patient via subcutaneous, percutaneous, intravascular and other types of injections comprises a hollow syringe body, a passageway at a distal end of the syringe for passage of fluid into and out of the syringe and a substantially open proximal end for receiving a plunger assembly. The plunger assembly includes a movable plunger assembly. A moveable plunger cooperates with the syringe body and the proximal end of the syringe to define a fluid chamber of variable volume in fluid communication with the passageway. Actuating means actuates movement of the plunger. An elastomeric barrier cooperates with the plunger and the open end of the syringe to define a sterile chamber between the actuating means and the fluid chamber to prevent passage of fluids from the fluid chamber to the actuating means and the passage of contaminants from the open end of the syringe in the fluid chamber.
    Type: Application
    Filed: April 11, 2001
    Publication date: August 30, 2001
    Inventor: Henry Walter Lyza
  • Patent number: 5743890
    Abstract: A piston (11) to be used in displacing a liquid inside a cylindrical chamber, such as in an injection cartridge of the dual-chamber type, has at least one of its end surfaces (12) shaped convex such that said end surface or surfaces (12) are essentially planar when the piston has been arranged inside the barrel of said cartridge. Preferably both pistons in the cartridge have such a shape, their planar surfaces facing each other.
    Type: Grant
    Filed: July 22, 1997
    Date of Patent: April 28, 1998
    Assignee: Pharmacia & Upjohn Aktiebolag
    Inventors: Birger Hjertman, Olle Ljungquist
  • Patent number: 5395326
    Abstract: A hand held syringe has a stationary handle and a moving handle to enable both stored and transported pharmaceuticals to be mixed and injecting the mixed pharmaceuticals under high pressure immediately after mixing through a long needle to a site interior of the body. The syringe is provided for squeeze grip at the stationary and moving handles between fingers and palm and includes a jell storage chamber side-by-side with a diluent storage chamber. Upon initial compression of the handles towards one another against a spring bias, the diluent discharges to the jell mix chamber along a one way path. At the same time, a handle actuated piston with loosely fitting O-ring in the jell mix chamber moves through the jell and introduced diluent effecting mixing movement by allowing the jell and diluent to flow between the piston and jell chamber sidewalls. Flow occurs from the jell chamber by the piston to an expansible chamber delimited by a floating seal.
    Type: Grant
    Filed: October 20, 1993
    Date of Patent: March 7, 1995
    Assignee: Habley Medical Technology Corporation
    Inventors: Terry M. Haber, William H. Smedley, Clark B. Foster
  • Patent number: 5314416
    Abstract: A syringe assembly including a plunger rod and a plunger tip which are designed to provide a low frictional resistance against the interior surface of the syringe barrel while the plunger rod is at rest but which will increase the sealing pressure between the plunger tip and the interior surface of the syringe barrel in proportion to the amount of force applied to the plunger rod. Additionally, the plunger rod may be moved in the syringe barrel in a laterally offset manner with respect to the longitudinal axis of the syringe barrel without significantly affecting the seal between the plunger tip and the syringe barrel.
    Type: Grant
    Filed: June 22, 1992
    Date of Patent: May 24, 1994
    Assignee: Sherwood Medical Company
    Inventors: Anthony K. Lewis, Eugene E. Weilbacher
  • Patent number: 5279563
    Abstract: An inflation system for pressurization and depressurization of a balloon catheter. The inflation system includes a syringe, including a syringe barrel, a plunger with expandable thread, a handle with cam, a syringe end cap, and a digital pressure gauge. The syringe is structured such that part of the syringe barrel has an internal thread which engages the expandable threads of the plunger. In the disengaged mode, the plunger slides freely within the syringe barrel allowing for rapid motion to purge, pressurize, or depressurize the inflation system. Once pressure reaches a predetermined level in the system, the cam on the handle causes the threads to automatically lock against the syringe barrel, and continued pressurization or depressurization is accomplished by the rotation of the plunger handle with respect to the syringe barrel. One advantage of the inflation system is that only one step is necessary for locking the syringe for controlled pressurization and depressurization.
    Type: Grant
    Filed: May 22, 1992
    Date of Patent: January 18, 1994
    Assignee: B. Braun Medical, Inc.
    Inventors: Gregory G. Brucker, Duane Zytkoviez, Thomas J. McEvoy
  • Patent number: 5236420
    Abstract: A resilient material pressurizing plunger for syringes or like containers in which the plunger construction is such that on the initial insertion into the syringe by a first inserting member, the plunger is distortable thus allowing the gas pressure generated by the plunger insertion to escape. The plunger is also capable of pressurizing the chamber when further insertion occurs by use of a second insertion member which prevents the distortion.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: August 17, 1993
    Inventor: Frederick W. Pfleger
  • Patent number: 5202533
    Abstract: A remote injection device for animals comprises a barrel with a piston slideable within the barrel from an initial retracted position at one end of the barrel forwardly toward the opposed end of the barrel to discharge liquid in an injection action through a needle at the forward end of the barrel. The piston is held in a retracted position by an O-ring on a release member which projects through an O-ring carried on the inside surface of the barrel. The inner diameter of the O-ring on the barrel can be adjusted by axial movement of the pair collars on the inside of the barrel. This adjusts the amount of force necessary to push the release member O-ring through the outer O-ring to release the piston to be moved by spring to the discharge position. The barrel can be mounted either upon an arrow type projectile so the impact forces are sufficient to release the piston upon engaging the animal.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: April 13, 1993
    Inventor: Douglas G. A. Vandersteen
  • Patent number: 4741462
    Abstract: An adjustable piston packing expander for use with conventional caulking gun piston assemblies is disclosed. The packing expander threads onto the piston rod and includes a frusto-conical expansion surface which contacts the inner surface of the packing wherein advanced threading of the packing expander onto the piston rod will adjustably expand the packing into sealing engagement with the gun barrel walls. A set screw locks the packing expander in adjustment relative to the packing. A lock washer keyed to the square piston rod and interlocked to a rear piston rod washer having locking pins extending into the packing and forming a part of the piston assembly interlocks the packing against motion relative to the piston rod.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: May 3, 1988
    Assignee: Albion Engineering Company
    Inventor: Franz K. Schneider, Jr.