Patents by Inventor Aaron M. Weir

Aaron M. Weir has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10342966
    Abstract: A barrel adapter mountable to a syringe barrel includes a barrel tip, a needle assembly, a stylet assembly slidably disposed within a needle lumen of the needle assembly, and a plug within the lumen of the needle. An implant delivery syringe includes a barrel, a plunger assembly, and the barrel adapter. The syringe may include a needle retraction mechanism having a biasing member and an actuable locking arrangement. When the actuable locking arrangement is actuated, the biasing member causes the needle to axially translate over the stylet during retraction to dislodge the plug and cause delivery of an implant to a target location. The plug may be a biodegradable polymer plug such as a water-soluble polymer, PLGA, and/or CARP. The stylet may be retracted following delivery. Methods of assembling implant delivery syringes with drug implants are also provided.
    Type: Grant
    Filed: May 11, 2015
    Date of Patent: July 9, 2019
    Assignee: UNL Holdings LLC
    Inventors: Gautam N. Shetty, Aaron M. Weir, Christian P. Brandt, Lou Castagna, Tod H. Brenner
  • Patent number: 10279121
    Abstract: A mixing device and a retractable syringe comprising same are provided. The mixing device comprises concentric outer and inner barrels that form an outer chamber, the inner barrel having an inner chamber. A mixing plunger is slidably located in the outer chamber. A seal located in the outer chamber is capable of axial movement, in response to depression of the mixing plunger, from a first position in sealing engagement with one or more apertures in the inner barrel to a second position intermediate the apertures and vents in the outer barrel. This allows depression of the mixing plunger to force a first substance from the outer chamber through the apertures to mix with a second substance in the inner chamber. The mixed substance in the inner barrel is then delivered by the syringe with subsequent needle retraction.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: May 7, 2019
    Assignee: UNL Holdings LLC
    Inventors: Ramin Mojdehbakhsh, Peter J. Dungar, Ashley W. Palmer, Robert E. Johannesson, Philip A. Weaver, Aaron M. Weir
  • Patent number: 10272234
    Abstract: A barrel adapter for a syringe having a barrel and plunger. The adapter comprises a barrel tip and a needle retraction mechanism having a needle subassembly with a needle and a lumen, actuator subassembly, and biasing member. The needle subassembly moves from an injection to a retracted position within the barrel tip. The actuator subassembly includes a retainer connected to the barrel tip, a stylet held in a stylet disc, and a prong passing into the retainer. The stylet slides within the needle lumen and is spaced from the needle tip in the injection position. The biasing member biases the NOM from the retainer. A locking arrangement compresses the biasing member when locked and releases the biasing member when actuated by depression of the plunger, which moves the prong against the retainer. The biasing member moves the needle and stylet from the injection position to the retracted position when released.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: April 30, 2019
    Assignee: UNL Holdings LLC
    Inventors: Lance Wetzel, Gautam N. Shetty, Aaron M. Weir, Robert Scott Russo
  • Publication number: 20160038688
    Abstract: A mixing device and a retractable syringe comprising same are provided. The mixing device comprises concentric outer and inner barrels that form an outer chamber, the inner barrel having an inner chamber. A mixing plunger is slidably located in the outer chamber. A seal located in the outer chamber is capable of axial movement, in response to depression of the mixing plunger, from a first position in sealing engagement with one or more apertures in the inner barrel to a second position intermediate the apertures and vents in the outer barrel. This allows depression of the mixing plunger to force a first substance from the outer chamber through the apertures to mix with a second substance in the inner chamber. The mixed substance in the inner barrel is then delivered by the syringe with subsequent needle retraction.
    Type: Application
    Filed: October 22, 2015
    Publication date: February 11, 2016
    Inventors: Ramin Mojdehbakhsh, Peter J. Dungar, Ashley W. Palmer, Robert E. Johannesson, Philip A. Weaver, Aaron M. Weir
  • Patent number: 9205194
    Abstract: A mixing device and a retractable syringe comprising same are provided. The mixing device comprises concentric outer and inner barrels that form an outer chamber, the inner barrel having an inner chamber. A mixing plunger is slidably located in the outer chamber. A seal located in the outer chamber is capable of axial movement, in response to depression of the mixing plunger, from a first position in sealing engagement with one or more apertures in the inner barrel to a second position intermediate the apertures and vents in the outer barrel. This allows depression of the mixing plunger to force a first substance from the outer chamber through the apertures to mix with a second substance in the inner chamber. The mixed substance in the inner barrel is then delivered by the syringe with subsequent needle retraction.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: December 8, 2015
    Assignee: Unitract Syringe Pty Ltd
    Inventors: Ramin Mojdehbakhsh, Peter J. Dungar, Ashley W. Palmer, Robert E. Johannesson, Philip A. Weaver, Aaron M. Weir
  • Publication number: 20150238745
    Abstract: A barrel adapter mountable to a syringe barrel includes a barrel tip, a needle assembly, a stylet assembly slidably disposed within a needle lumen of the needle assembly, and a plug within the lumen of the needle. An implant delivery syringe includes a barrel, a plunger assembly, and the barrel adapter. The syringe may include a needle retraction mechanism having a biasing member and an actuable locking arrangement, the locking arrangement initially maintains the biasing member in an energized position. When the actuable locking arrangement is actuated, the biasing member causes the needle to axially translate over the stylet during retraction to dislodge the plug and cause delivery of an implant to a target location. The plug may be a biodegradable polymer plug such as a water-soluble polymer, PLGA, and/or CAHP. The stylet may be retracted following delivery. Methods of assembling implant delivery syringes with drug implants are also provided.
    Type: Application
    Filed: May 11, 2015
    Publication date: August 27, 2015
    Inventors: Gautam N. Shetty, Aaron M. Weir, Christian P. Brandt, Lou Castagna, Tod H. Brenner
  • Publication number: 20150202419
    Abstract: A barrel adapter for a syringe having a barrel and plunger. The adapter comprises a barrel tip and a needle retraction mechanism having a needle subassembly with a needle and a lumen, actuator subassembly, and biasing member. The needle subassembly moves from an injection to a retracted position within the barrel tip. The actuator subassembly includes a retainer connected to the barrel tip, a stylet held in a stylet disc, and a prong passing into the retainer. The stylet slides within the needle lumen and is spaced from the needle tip in the injection position. The biasing member biases the NOM from the retainer. A locking arrangement compresses the biasing member when locked and releases the biasing member when actuated by depression of the plunger, which moves the prong against the retainer. The biasing member moves the needle and stylet from the injection position to the retracted position when released.
    Type: Application
    Filed: April 1, 2015
    Publication date: July 23, 2015
    Inventors: Lance Wetzel, Gautam N. Shetty, Aaron M. Weir, Robert Scott Russo
  • Patent number: 9050415
    Abstract: An implant delivery syringe includes a barrel, a plunger assembly, and a barrel adapter. A barrel adapter mountable to a syringe barrel includes a barrel tip, needle retraction mechanism, needle assembly and stylet slidably disposed within the needle lumen. The needle retraction mechanism includes a biasing member, actuable locking arrangement and locking mechanism. When the actuable locking arrangement is actuated, the biasing member causes the needle to axially translate over the stylet during retraction to cause delivery of an implant to a target location. The stylet may be retracted following delivery. Methods of assembling, manufacturing, and using are also provided.
    Type: Grant
    Filed: February 23, 2013
    Date of Patent: June 9, 2015
    Assignee: Unitract Syringe Pty Ltd
    Inventors: Gautam N. Shetty, Aaron M. Weir, Christian P. Brandt, Lou Castagna, Tod H. Brenner
  • Publication number: 20130237910
    Abstract: An implant delivery syringe includes a barrel, a plunger assembly, and a barrel adapter. A barrel adapter mountable to a syringe barrel includes a barrel tip, needle retraction mechanism, needle assembly and stylet slidably disposed within the needle lumen. The needle retraction mechanism includes a biasing member, actuable locking arrangement and locking mechanism. When the actuable locking arrangement is actuated, the biasing member causes the needle to axially translate over the stylet during retraction to cause delivery of an implant to a target location. The stylet may be retracted following delivery. Methods of assembling, manufacturing, and using are also provided.
    Type: Application
    Filed: February 23, 2013
    Publication date: September 12, 2013
    Inventors: Gautam N. Shetty, Aaron M. Weir, Christian P. Brandt, Lou Castagna, Tod H. Brenner
  • Publication number: 20130035664
    Abstract: A mixing device and a retractable syringe comprising same are provided. The mixing device comprises concentric outer and inner barrels that form an outer chamber, the inner barrel having an inner chamber. A mixing plunger is slidably located in the outer chamber. A seal located in the outer chamber is capable of axial movement, in response to depression of the mixing plunger, from a first position in sealing engagement with one or more apertures in the inner barrel to a second position intermediate the apertures and vents in the outer barrel. This allows depression of the mixing plunger to force a first substance from the outer chamber through the apertures to mix with a second substance in the inner chamber. The mixed substance in the inner barrel is then delivered by the syringe with subsequent needle retraction.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 7, 2013
    Applicant: UNITRACT SYRINGE PTY LTD
    Inventors: Ramin Mojdehbakhsh, Peter J. Dungar, Ashley W. Palmer, Robert E. Johannesson, Philip A. Weaver, Aaron M. Weir