Patents by Inventor Mahmood Dehdashtian

Mahmood Dehdashtian 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: 10285833
    Abstract: Stent delivery systems and associated methods for delivering stents are disclosed herein. In several embodiments, a handle assembly for delivering a stent from a tubular enclosure can include a first lead screw having a first lead thread of a first pitch and first handedness, a second lead screw having a second lead thread of a second pitch and second handedness different from the first handedness, and a housing defining threads of the first and second pitches. The first lead screw can be in mechanical communication with the tubular enclosure, and the second lead screw can be in mechanical communication with the stent. Upon rotation of a portion of the housing, the housing threads can engage the lead screws so as to induce simultaneous translations of the lead screws in opposite directions. The simultaneous translations are configured to deploy the stent from the tubular enclosure.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: May 14, 2019
    Assignee: Lombard Medical Limited
    Inventors: Andrew H. Cragg, John Logan, Nelson Quintana, Mahmood Dehdashtian, George Tsai
  • Publication number: 20150190257
    Abstract: Stent graft delivery systems are disclosed herein. In several embodiments, a stent graft delivery system can include a stent graft having a proximal portion and a distal portion, a proximal sheath and a distal sheath. The proximal sheath can be configured to cover the proximal portion of the stent graft, and the distal sheath can be configured to cover the distal portion of the stent graft. The proximal sheath and the distal sheath can be independently removable from respective ends of the stent graft such that the proximal and distal portions of the stent graft are independently deployable.
    Type: Application
    Filed: September 26, 2014
    Publication date: July 9, 2015
    Inventors: Andrew H. Cragg, Isa Rizk, Stephen Sosnowski, John Logan, Mahmood Dehdashtian, Pedram Nourian
  • Patent number: 8858613
    Abstract: Stent graft delivery systems are disclosed herein. In several embodiments, a stent graft delivery system can include a stent graft having a proximal portion and a distal portion, a proximal sheath and a distal sheath. The proximal sheath can be configured to cover the proximal portion of the stent graft, and the distal sheath can be configured to cover the distal portion of the stent graft. The proximal sheath and the distal sheath can be independently removable from respective ends of the stent graft such that the proximal and distal portions of the stent graft are independently deployable.
    Type: Grant
    Filed: September 20, 2011
    Date of Patent: October 14, 2014
    Assignee: Altura Medical, Inc.
    Inventors: Andrew H. Cragg, Isa Rizk, Stephen Sosnowski, John Logan, Mahmood Dehdashtian, Pedram Nourian
  • Publication number: 20140052232
    Abstract: Handle assemblies for stent graft delivery systems and associated methods are disclosed herein. In several embodiments, a handle assembly for a stent graft delivery system includes a movable pushing component configured to deliver a distal portion of the stent graft to an arterial target site. The assembly further includes a moveable pulling component configured to interface with the pushing component and provide a compression force to the distal portion of the stent graft. The stent graft comprises a helix angle and the pulling component is configured to move relative to the pushing component at a ratio corresponding to the helix angle.
    Type: Application
    Filed: August 9, 2013
    Publication date: February 20, 2014
    Inventors: Andrew H. Cragg, John Logan, George Tsai, Nelson Quintana, Mahmood Dehdashtian
  • Publication number: 20140046429
    Abstract: Stent delivery systems and associated methods for delivering stents are disclosed herein. In several embodiments, a handle assembly for delivering a stent from a tubular enclosure can include a first lead screw having a first lead thread of a first pitch and first handedness, a second lead screw having a second lead thread of a second pitch and second handedness different from the first handedness, and a housing defining threads of the first and second pitches. The first lead screw can be in mechanical communication with the tubular enclosure, and the second lead screw can be in mechanical communication with the stent. Upon rotation of a portion of the housing, the housing threads can engage the lead screws so as to induce simultaneous translations of the lead screws in opposite directions. The simultaneous translations are configured to deploy the stent from the tubular enclosure.
    Type: Application
    Filed: August 9, 2013
    Publication date: February 13, 2014
    Applicant: ALTURA MEDICAL, INC.
    Inventors: Andrew H. Cragg, John Logan, George Tsai, Nelson Quintana, Mahmood Dehdashtian
  • Publication number: 20140046428
    Abstract: Stent delivery systems and associated methods for delivering stents are disclosed herein. In several embodiments, a handle assembly for delivering a stent from a tubular enclosure can include a first lead screw having a first lead thread of a first pitch and first handedness, a second lead screw having a second lead thread of a second pitch and second handedness different from the first handedness, and a housing defining threads of the first and second pitches. The first lead screw can be in mechanical communication with the tubular enclosure, and the second lead screw can be in mechanical communication with the stent. Upon rotation of a portion of the housing, the housing threads can engage the lead screws so as to induce simultaneous translations of the lead screws in opposite directions. The simultaneous translations are configured to deploy the stent from the tubular enclosure.
    Type: Application
    Filed: August 9, 2013
    Publication date: February 13, 2014
    Inventors: Andrew H. Cragg, John Logan, Nelson Quintana, Mahmood Dehdashtian, George Tsai
  • Publication number: 20120130469
    Abstract: Stent graft delivery systems are disclosed herein. In several embodiments, a stent graft delivery system can include a stent graft having a proximal portion and a distal portion, a proximal sheath and a distal sheath. The proximal sheath can be configured to cover the proximal portion of the stent graft, and the distal sheath can be configured to cover the distal portion of the stent graft. The proximal sheath and the distal sheath can be independently removable from respective ends of the stent graft such that the proximal and distal portions of the stent graft are independently deployable.
    Type: Application
    Filed: September 20, 2011
    Publication date: May 24, 2012
    Applicant: Altura Medical, Inc.
    Inventors: Andrew H. Cragg, Isa Rizk, Stephen Sosnowski, John Logan, Mahmood Dehdashtian, Pedram Nourian