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).
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Publication number: 20200282542Abstract: 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: ApplicationFiled: March 6, 2020Publication date: September 10, 2020Inventors: Valgeir PETURSSON, Stefan Orn STEFANSSON, David SANDAHL
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Publication number: 20200281746Abstract: Prosthetic feet that provide for variable and adjustable stiffness are provided. A foot element can include a tongue portion defined or formed by a slot in the foot element that at least partially separates the tongue portion from a remainder of the foot element. The tongue portion can be operably connected to the remainder of the foot member to increase the stiffness of the foot member or operably disconnected from the remainder of the foot member to increase the flexibility of the foot member. The prosthetic foot further includes a mechanism for adjusting whether the tongue portion is operably connected or disconnected from the remainder of the foot member. The mechanism can be selectively actuated to adjust the stiffness of the foot element in dorsiflexion and/or plantarflexion and/or to adjust the degree to which the tongue portion is allowed to flex relative to the remainder of the foot member.Type: ApplicationFiled: March 17, 2020Publication date: September 10, 2020Inventor: David Sandahl
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Patent number: 10729568Abstract: A vacuum suspension system includes a pump mechanism operatively connectable to a prosthetic socket. The pump mechanism has a first member and a second member. An inflatable bladder is disposed between the first and second members. A fluid chamber is located between the first and second members and fluidly separate from the inflatable bladder. Inflation of the inflatable bladder mechanically separates the first and second parts to create a vacuum pressure in the fluid chamber.Type: GrantFiled: August 15, 2017Date of Patent: August 4, 2020Assignee: Ossur HFInventor: David Sandahl
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Publication number: 20200237533Abstract: 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: ApplicationFiled: April 13, 2020Publication date: July 30, 2020Inventors: Grimur JONSSON, Bjarni GUNNARSSON, Olafur Freyr HALLDORSSON, David SANDAHL
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Patent number: 10624765Abstract: Prosthetic feet that provide for variable and adjustable stiffness are provided. A foot element can include a tongue portion defined or formed by a slot in the foot element that at least partially separates the tongue portion from a remainder of the foot element. The tongue portion can be operably connected to the remainder of the foot member to increase the stiffness of the foot member or operably disconnected from the remainder of the foot member to increase the flexibility of the foot member. The prosthetic foot further includes a mechanism for adjusting whether the tongue portion is operably connected or disconnected from the remainder of the foot member. The mechanism can be selectively actuated to adjust the stiffness of the foot element in dorsiflexion and/or plantarflexion and/or to adjust the degree to which the tongue portion is allowed to flex relative to the remainder of the foot member.Type: GrantFiled: July 2, 2018Date of Patent: April 21, 2020Assignee: Össur Iceland ehfInventor: David Sandahl
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Patent number: 10617537Abstract: 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: GrantFiled: January 31, 2018Date of Patent: April 14, 2020Assignee: OSSUR HFInventors: Grimur Jonsson, Bjarni Gunnarsson, Olafur Freyr Halldorsson, David Sandahl
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Publication number: 20200085598Abstract: 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: ApplicationFiled: November 18, 2019Publication date: March 19, 2020Inventors: David SANDAHL, Dana Stewart MARLIN, Hafsteinn JONASSON
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Publication number: 20200022822Abstract: 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: ApplicationFiled: July 30, 2019Publication date: January 23, 2020Inventors: Dana Stewart Marlin, David Sandahl
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Patent number: 10512554Abstract: 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: GrantFiled: August 24, 2017Date of Patent: December 24, 2019Assignee: OSSUR ICELAND EHFInventors: David Sandahl, Dana Stewart Marlin, Hafsteinn Jonasson
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Publication number: 20190365546Abstract: 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: ApplicationFiled: August 19, 2019Publication date: December 5, 2019Inventors: Hafsteinn JONASSON, Dadi GRANZ, Marco STEINBERG, David SANDAHL
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Patent number: 10413429Abstract: 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: GrantFiled: August 15, 2016Date of Patent: September 17, 2019Assignee: OSSUR ICELAND EHFInventors: Hafsteinn Jonasson, Dadi Granz, Marco Steinberg, David Sandahl
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Patent number: 10405999Abstract: 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: GrantFiled: February 17, 2015Date of Patent: September 10, 2019Assignee: ÖSSUR ICELAND EHFInventors: Dana Stewart Marlin, David Sandahl
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Patent number: 10369018Abstract: A prosthetic foot including a foot member and a heel member attached to a bottom surface of the foot member. A pump mechanism is located above the foot member and includes a housing and an elastomeric member at least in part defining a fluid chamber. The elastomeric member is operatively connected to the foot member such that when no weight is placed on the prosthetic foot the volume of the fluid chamber is zero or near-zero and upon heel strike the housing rotates relative to the foot member to expand the volume of the fluid chamber and draw fluid into the fluid chamber from a prosthetic socket in fluid communication with the pump mechanism.Type: GrantFiled: March 13, 2017Date of Patent: August 6, 2019Assignee: OSSUR HFInventors: Olafur Freyr Halldorsson, David Sandahl, Bjarni Gunnarsson, Egill Sveinbjorn Egilsson
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Publication number: 20190015223Abstract: 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: ApplicationFiled: September 17, 2018Publication date: January 17, 2019Inventors: Olafur Freyr HALLDORSSON, David SANDAHL, Bjarni GUNNARSSON, Egill Sveinbjorn EGILSSON
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Publication number: 20190000648Abstract: Prosthetic feet that provide for variable and adjustable stiffness are provided. A foot element can include a tongue portion defined or formed by a slot in the foot element that at least partially separates the tongue portion from a remainder of the foot element. The tongue portion can be operably connected to the remainder of the foot member to increase the stiffness of the foot member or operably disconnected from the remainder of the foot member to increase the flexibility of the foot member. The prosthetic foot further includes a mechanism for adjusting whether the tongue portion is operably connected or disconnected from the remainder of the foot member. The mechanism can be selectively actuated to adjust the stiffness of the foot element in dorsiflexion and/or plantarflexion and/or to adjust the degree to which the tongue portion is allowed to flex relative to the remainder of the foot member.Type: ApplicationFiled: July 2, 2018Publication date: January 3, 2019Inventor: David Sandahl
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Publication number: 20180221176Abstract: 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: ApplicationFiled: April 10, 2018Publication date: August 9, 2018Inventors: Olafur Freyr HALLDORSSON, David SANDAHL, Bjarni GUNNARSSON, Egill Sveinbjorn EGILSSON
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Patent number: 10034782Abstract: Prosthetic feet that provide for variable and adjustable stiffness are provided. A foot element can include a tongue portion defined or formed by a slot in the foot element that at least partially separates the tongue portion from a remainder of the foot element. The tongue portion can be operably connected to the remainder of the foot member to increase the stiffness of the foot member or operably disconnected from the remainder of the foot member to increase the flexibility of the foot member. The prosthetic foot further includes a mechanism for adjusting whether the tongue portion is operably connected or disconnected from the remainder of the foot member. The mechanism can be selectively actuated to adjust the stiffness of the foot element in dorsiflexion and/or plantarflexion and/or to adjust the degree to which the tongue portion is allowed to flex relative to the remainder of the foot member.Type: GrantFiled: September 18, 2015Date of Patent: July 31, 2018Assignee: Össur hfInventor: David Sandahl
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Publication number: 20180153712Abstract: 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: ApplicationFiled: December 1, 2017Publication date: June 7, 2018Inventors: Aron Kristbjorn Albertsson, Maria Gudrun Sveinbjornsdottir, Rowan Patrick Robinson Cain, Jeroen Nijman, David Sandahl
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Publication number: 20180153715Abstract: 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: ApplicationFiled: January 31, 2018Publication date: June 7, 2018Inventors: Grimur JONSSON, Bjarni GUNNARSSON, Olafur Freyr HALLDORSSON, David SANDAHL
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Publication number: 20180055659Abstract: 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: ApplicationFiled: August 24, 2017Publication date: March 1, 2018Inventors: David SANDAHL, Dana Stewart MARLIN, Hafsteinn JONASSON