Patents by Inventor David Sandahl

David Sandahl 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).

  • Publication number: 20240139567
    Abstract: A fire suppression nozzle includes a first support plate, a conduit including an inlet and an outlet, and a baffle made of a porous material extending from the first support plate and at least partially surrounding the outlet to form an interior in fluid communication with the outlet and an end opening. The conduit is configured to receive an inert gas at the inlet and provide the inert gas to the interior of the baffle via the outlet such that the inert gas exits the outlet and passes at least partially through the baffle. The nozzle includes a sound absorbing member extending across the end opening to at least partially enclose the interior, and also includes a sound absorbing insert composed of a sound absorbing material and a second support plate arranged against an outer face of the sound absorbing insert and coupled to the first support plate.
    Type: Application
    Filed: December 14, 2023
    Publication date: May 2, 2024
    Applicant: Tyco Fire Products LP
    Inventors: Arash Agan, Melissa Ann Figueiredo Loureiro, Michael David Mulzer, Derek M. Sandahl
  • Publication number: 20240041621
    Abstract: Prosthetic feet that allow for heel height adjustment and/or provide metatarsal joint functionality to more closely mimic natural human feet are provided. A prosthetic foot can include an ankle module having a locking mechanism configured to lock the heel at a particular height. The prosthetic foot can also include a toe region that adapts to varying heel heights. The ankle module and/or locking mechanism can be adjusted, controlled, and/or locked via a hydraulic mechanism. The toe region can curve upward relative to a portion of the foot proximal of the toe region.
    Type: Application
    Filed: August 22, 2023
    Publication date: February 8, 2024
    Inventors: Aron Kristbjorn Albertsson, Maria Gudrun Sveinbjornsdottir, Rowan Patrick Robinson Cain, Jeroen Nijman, David Sandahl, Larus Gunnsteinsson
  • Publication number: 20240000595
    Abstract: A polycentric hinge for an orthopedic device includes first and second hinge arms, and two cover plates, rather than numerous individual parts and fasteners. The first and second cover plates define a plurality of bearings and a plurality of recesses for receiving the bearings, whereby the hinge arms are mounted about the bearings and are pivotable relative to one another while encased by the first and second cover plates. Additional bearing surfaces are provided for securing snap-fitted rotation stops without a tool or fasteners. The components of the hinge are formed from injection molded materials such as plastics.
    Type: Application
    Filed: June 28, 2023
    Publication date: January 4, 2024
    Inventors: Halldor ALBERTSSON, David SANDAHL, Valgeir PETURSSON
  • Patent number: 11771572
    Abstract: Prosthetic feet that allow for heel height adjustment and/or provide metatarsal joint functionality to more closely mimic natural human feet are provided. A prosthetic foot can include an ankle module having a locking mechanism configured to lock the heel at a particular height. The prosthetic foot can also include a toe region that adapts to varying heel heights. The ankle module and/or locking mechanism can be adjusted, controlled, and/or locked via a hydraulic mechanism. The toe region can curve upward relative to a portion of the foot proximal of the toe region.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: October 3, 2023
    Assignee: Össur Iceland ehf
    Inventors: Aron Kristbjorn Albertsson, Maria Gudrun Sveinbjornsdottir, Rowan Patrick Robinson Cain, Jeroen Nijman, David Sandahl, Larus Gunnsteinsson
  • Patent number: 11696842
    Abstract: A vacuum assisted suspension system includes a prosthetic foot and a pump mechanism connected to the foot and fluidly couplable to a prosthetic socket. The pump mechanism includes an elongate pivoting member rotatable relative to the prosthetic foot about a joint and including a distal recess. A piston is connected to the foot and is movably received in the recess. A fluid chamber is defined between the piston and the interior of the recess. When no weight is placed on the foot a volume of the fluid chamber is zero or near-zero and when weight of a user is placed on the prosthetic foot the pivoting member rotates away from the piston and expands the volume of the fluid chamber to draw fluid into the fluid chamber from the prosthetic socket.
    Type: Grant
    Filed: April 13, 2020
    Date of Patent: July 11, 2023
    Assignee: OSSUR HF
    Inventors: Grimur Jonsson, Bjarni Gunnarsson, Olafur Freyr Halldorsson, David Sandahl
  • Publication number: 20230087706
    Abstract: A prosthetic system includes a prosthetic foot defining an upper surface and having a flexible configuration and a pump system attached to the prosthetic foot. The pump system includes a pump mechanism defining a fluid chamber having variable configuration and an actuating part. The actuating part is arranged to selectively engage with and separate a distance from the upper surface of the foot plate to move the pump mechanism between a first position in which a volume of the fluid chamber is zero or near-zero and a second position in which the volume of the fluid chamber is expanded relative to the first position. The volume of the fluid chamber increases when the actuating part moves away from the upper surface of the foot plate.
    Type: Application
    Filed: November 23, 2022
    Publication date: March 23, 2023
    Inventors: Olafur Freyr HALLDORSSON, David SANDAHL, Bjarni GUNNARSSON, Egill Sveinbjorn EGILSSON
  • Publication number: 20230064710
    Abstract: A prosthetic foot can include an attachment member, at least one first brace, at least one first flexible member, an unpowered actuator, at least one second brace, and at least one second flexible member. The attachment member can include a connector configured to connect the attachment member to a user or another prosthetic device. The at least one first brace can mount to the attachment member and the at least one first flexible member can connect to the attachment member by the at least one first brace such that a force between the ground and the attachment member can be supported by the at least one first flexible member. The unpowered actuator can mount to the attachment member and the at least one second brace can mounted to the actuator. The at least one second flexible member can connect to the attachment member by the at least one second brace such that a force between the ground and the attachment member can be supported by the at least one second flexible member.
    Type: Application
    Filed: August 11, 2022
    Publication date: March 2, 2023
    Inventors: Arinbjorn Viggo Clausen, Bjarni Andresson, Ragnar Orn Gunnarsson, Christophe Guy Lecomte, Maria Gudrun Sveinbjornsdottir, David Sandahl, Atli Orn Sverrisson, David Langlois
  • Publication number: 20220304833
    Abstract: A prosthetic system includes first and second parts rotatable relative to one another about a joint. The first and second parts are adapted to form at least part of a weight bearing connection between a prosthetic foot and a socket. A pump system includes a pump mechanism operatively connected to the first and second parts. Rotation of the first part and/or the second part about the joint moves the pump mechanism between an original configuration in which the volume of a fluid chamber defined by the pump mechanism is zero or near-zero, and an expanded configuration in which the volume of the fluid chamber is increased.
    Type: Application
    Filed: June 15, 2022
    Publication date: September 29, 2022
    Inventors: David SANDAHL, Dana Stewart MARLIN, Hafsteinn JONASSON
  • Patent number: 11446166
    Abstract: A prosthetic foot can include an attachment member, at least one first brace, at least one first flexible member, an unpowered actuator, at least one second brace, and at least one second flexible member. The attachment member can include a connector configured to connect the attachment member to a user or another prosthetic device. The at least one first brace can mount to the attachment member and the at least one first flexible member can connect to the attachment member by the at least one first brace such that a force between the ground and the attachment member can be supported by the at least one first flexible member. The unpowered actuator can mount to the attachment member and the at least one second brace can mounted to the actuator. The at least one second flexible member can connect to the attachment member by the at least one second brace such that a force between the ground and the attachment member can be supported by the at least one second flexible member.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: September 20, 2022
    Assignee: Össur Iceland ehf
    Inventors: Arinbjorn Viggo Clausen, Bjarni Andresson, Ragnar Orn Gunnarsson, Christophe Guy Lecomte, Maria Gudrun Sveinbjornsdottir, David Sandahl, Atli Orn Sverrisson, David Langlois
  • Publication number: 20220273467
    Abstract: A prosthetic system includes a prosthetic foot having an upper foot element with a concave-forward facing portion and foot portion extending forwardly therefrom. An intermediate foot element is disposed below the upper foot element and has a front portion coupled to the foot portion of the upper foot element. A lower foot element is disposed below the intermediate foot element. A pump system is coupled to the prosthetic foot and comprises a pump mechanism including a housing defining a cavity, and a membrane situated in the cavity. The pump mechanism is movable between an original configuration and an expanded configuration. An arm member is connected to the pump mechanism and operatively coupled to the intermediate foot element. The arm member is arranged to move the pump mechanism toward at least the expanded configuration upon movement of the intermediate foot element relative to the upper foot element.
    Type: Application
    Filed: May 18, 2022
    Publication date: September 1, 2022
    Inventors: Hafsteinn JONASSON, Dadi GRANZ, Marco STEINBERG, David SANDAHL
  • Patent number: 11413167
    Abstract: A prosthetic joint can include a first attachment member and a second attachment member coupled to the first attachment member. The second attachment member can include a cylindrical chamber. The prosthetic joint can include a fixation system disposed within the cylindrical chamber comprising at least one cam. The prosthetic joint can have an unlocked configuration, wherein in the unlocked configuration the first attachment member and the second attachment member can rotate relative to each other. The prosthetic joint can have a locked configuration, wherein in the locked configuration the first attachment member is substantially prevented from rotating relative to the second attachment member.
    Type: Grant
    Filed: July 30, 2019
    Date of Patent: August 16, 2022
    Assignee: Össur Iceland Ehf
    Inventors: Dana Stewart Marlin, David Sandahl
  • Publication number: 20220212333
    Abstract: An adapter is arranged to secure to a rotary device. The adapter includes a handle rotatable about an axis, and a coupler extending from and coaxial with the handle. The coupler is adapted to engage the rotary device via traction elements for simultaneously rotating the rotary device and the handle.
    Type: Application
    Filed: March 24, 2022
    Publication date: July 7, 2022
    Inventors: Valgeir PETURSSON, Stefan Orn STEFANSSON, David SANDAHL
  • Patent number: 11376139
    Abstract: A prosthetic system includes first and second parts rotatable relative to one another about a joint. The first and second parts are adapted to form at least part of a weight bearing connection between a prosthetic foot and a socket. A pump system includes a pump mechanism operatively connected to the first and second parts. Rotation of the first part and/or the second part about the joint moves the pump mechanism between an original configuration in which the volume of a fluid chamber defined by the pump mechanism is zero or near-zero, and an expanded configuration in which the volume of the fluid chamber is increased.
    Type: Grant
    Filed: November 18, 2019
    Date of Patent: July 5, 2022
    Assignee: OSSUR ICELAND EHF
    Inventors: David Sandahl, Dana Stewart Marlin, Hafsteinn Jonasson
  • Publication number: 20220192912
    Abstract: An exoskeleton system includes a body interface and connects to a power supply. The body interface and the power supply include a quick lock connection mechanism arranged to adjust to the height and width of a user. The body interface includes a connection frame that defines at least two anchoring slots at different heights for connecting to corresponding anchors extending from the power supply. The power supply includes a removable locking element for securing the anchors to the anchoring slots at a selected height position. The power supply may have transmission arms driven by a drive system, and an assistive system for connection to a user. The transmission arms may be slidably connected to the drive system and have a locking part to secure the power supply in a plurality of predetermined width positions.
    Type: Application
    Filed: April 23, 2020
    Publication date: June 23, 2022
    Inventors: Kristin Asa THORISDOTTIR, David SANDAHL
  • Patent number: 11357647
    Abstract: A prosthetic system includes a prosthetic foot having an upper foot element with a concave-forward facing portion and foot portion extending forwardly therefrom. An intermediate foot element is disposed below the upper foot element and has a front portion coupled to the foot portion of the upper foot element. A lower foot element is disposed below the intermediate foot element. A pump system is coupled to the prosthetic foot and comprises a pump mechanism including a housing defining a cavity, and a membrane situated in the cavity. The pump mechanism is movable between an original configuration and an expanded configuration. An arm member is connected to the pump mechanism and operatively coupled to the intermediate foot element. The arm member is arranged to move the pump mechanism toward at least the expanded configuration upon movement of the intermediate foot element relative to the upper foot element.
    Type: Grant
    Filed: August 19, 2019
    Date of Patent: June 14, 2022
    Assignee: OSSUR ICELAND EHF
    Inventors: Hafsteinn Jonasson, Dadi Granz, Marco Steinberg, David Sandahl
  • Patent number: 11311997
    Abstract: An adapter is arranged to secure to a rotary device. The adapter includes a handle rotatable about an axis, and a coupler extending from and coaxial with the handle. The coupler is adapted to engage the rotary device via traction elements for simultaneously rotating the rotary device and the handle.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: April 26, 2022
    Assignee: OSSUR ICELAND EHF
    Inventors: Valgeir Petursson, Stefan Orn Stefansson, David Sandahl
  • Patent number: 11141294
    Abstract: A prosthetic system includes a prosthetic foot defining an upper surface and having a flexible configuration and a pump system attached to the prosthetic foot. The pump system includes a pump mechanism defining a fluid chamber having variable configuration and an actuating part. The actuating part is arranged to selectively engage with and separate a distance from the upper surface of the foot plate to move the pump mechanism between a first position in which a volume of the fluid chamber is zero or near-zero and a second position in which the volume of the fluid chamber is expanded relative to the first position. The volume of the fluid chamber increases when the actuating part moves away from the upper surface of the foot plate.
    Type: Grant
    Filed: September 17, 2018
    Date of Patent: October 12, 2021
    Assignee: OSSUR HF
    Inventors: Olafur Freyr Halldorsson, David Sandahl, Bjarni Gunnarsson, Egill Sveinbjorn Egilsson
  • Patent number: 11058561
    Abstract: A prosthetic system includes a prosthetic valve having a valve body with a shaft defining a flow channel fluidly connectable to an interior of a socket. One or more ports in the valve body are in fluid communication with the flow channel and a membrane is positioned in the valve body. A release button associated with the membrane controls allow air flow into the socket via the one or more ports while air can flow out of the socket via the one or more ports independent of operation of the release button. A one-way valve is connected to the valve assembly that selectively permit air flow out of the socket. A valve insert is mountable on the socket and arranged to couple the valve body to the socket. The valve insert defines an opening configured to allow the shaft to extend through the valve insert and into the socket.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: July 13, 2021
    Assignee: OSSUR HF
    Inventors: Olafur Freyr Halldorsson, David Sandahl, Bjarni Gunnarsson, Egill Sveinbjorn Egilsson
  • Publication number: 20210077281
    Abstract: Prosthetic feet that allow for heel height adjustment and/or provide metatarsal joint functionality to more closely mimic natural human feet are provided. A prosthetic foot can include an ankle module having a locking mechanism configured to lock the heel at a particular height. The prosthetic foot can also include a toe region that adapts to varying heel heights. The ankle module and/or locking mechanism can be adjusted, controlled, and/or locked via a hydraulic mechanism. The toe region can curve upward relative to a portion of the foot proximal of the toe region.
    Type: Application
    Filed: September 28, 2020
    Publication date: March 18, 2021
    Inventors: Aron Kristbjorn Albertsson, Maria Gudrun Sveinbjornsdottir, Rowan Patrick Robinson Cain, Jeroen Nijman, David Sandahl, Larus Gunnsteinsson
  • Patent number: 10821007
    Abstract: Prosthetic feet that allow for heel height adjustment and/or provide metatarsal joint functionality to more closely mimic natural human feet are provided. A prosthetic foot can include an ankle module having a locking mechanism configured to lock the heel at a particular height. The prosthetic foot can also include a toe region that adapts to varying heel heights. The ankle module and/or locking mechanism can be adjusted, controlled, and/or locked via a hydraulic mechanism. The toe region can curve upward relative to a portion of the foot proximal of the toe region.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: November 3, 2020
    Assignee: Össur Iceland ehf
    Inventors: Aron Kristbjorn Albertsson, Maria Gudrun Sveinbjornsdottir, Rowan Patrick Robinson Cain, Jeroen Nijman, David Sandahl, Larus Gunnsteinsson