Patents by Inventor Christian A. Halvorsen
Christian A. Halvorsen 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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Patent number: 11937815Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob when an instrument shaft is engaged with the handle. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler and can provide certain motor drive profiles for predetermined positions of the stapler. The powered handle can include a manual return mechanism.Type: GrantFiled: June 3, 2021Date of Patent: March 26, 2024Assignee: Applied Medical Resources CorporationInventors: Erik D. Nelson, Jonathan R. Nash, Timothy M. Hopkins, Kevin Hudson, Andy Pham, Zachary W. Gyugyi, Joshua A. Spalding, Christian A Halvorsen
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Publication number: 20230404579Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual return mechanism. The powered handle can also include a retention mechanism to prevent unintentional movement of drivetrain components upon actuation of the manual return mechanism. For example, the retention mechanism can apply a direction-dependent frictional force on an actuation shaft of the handle assembly to prevent unintentional movement of the actuation shaft towards a distal end of the handle assembly. The retention mechanism can include a featherboard-like configuration with a plurality of ribs oriented transversely to the actuation shaft to restrict movement of the actuation shaft in one direction while allowing movement of the shaft in the opposite direction.Type: ApplicationFiled: August 30, 2023Publication date: December 21, 2023Inventors: Jonathan Von Stein, Kimball B. McGinley, Robert Bradshaw, Alan Bylund, Christian A. Halvorsen, Jonathan R. Nash
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Patent number: 11771428Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual return mechanism. The powered handle can also include a retention mechanism to prevent unintentional movement of drivetrain components upon actuation of the manual return mechanism. For example, the retention mechanism can apply a direction-dependent frictional force on an actuation shaft of the handle assembly to prevent unintentional movement of the actuation shaft towards a distal end of the handle assembly. The retention mechanism can include a featherboard-like configuration with a plurality of ribs oriented transversely to the actuation shaft to restrict movement of the actuation shaft in one direction while allowing movement of the shaft in the opposite direction.Type: GrantFiled: October 29, 2021Date of Patent: October 3, 2023Assignee: Applied Medical Resources CorporationInventors: Jonathan Von Stein, Kimball B. McGinley, Robert Bradshaw, Alan Bylund, Christian A. Halvorsen, Jonathan R. Nash
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Publication number: 20220133317Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual return mechanism. The powered handle can also include a retention mechanism to prevent unintentional movement of drivetrain components upon actuation of the manual return mechanism. For example, the retention mechanism can apply a direction-dependent frictional force on an actuation shaft of the handle assembly to prevent unintentional movement of the actuation shaft towards a distal end of the handle assembly. The retention mechanism can include a featherboard-like configuration with a plurality of ribs oriented transversely to the actuation shaft to restrict movement of the actuation shaft in one direction while allowing movement of the shaft in the opposite direction.Type: ApplicationFiled: October 29, 2021Publication date: May 5, 2022Inventors: Jonathan Von Stein, Kimball B. McGinley, Robert Bradshaw, Alan Bylund, Christian A. Halvorsen, Jonathan R. Nash
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Publication number: 20210290234Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob when an instrument shaft is engaged with the handle. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler and can provide certain motor drive profiles for predetermined positions of the stapler. The powered handle can include a manual return mechanism.Type: ApplicationFiled: June 3, 2021Publication date: September 23, 2021Inventors: Erik D. Nelson, Jonathan R. Nash, Timothy M. Hopkins, Kevin Hudson, Andy Pham, Zachary W. Gyugyi, Joshua A. Spalding, Christian A. Halvorsen
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Patent number: 11064999Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob when an instrument shaft is engaged with the handle. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler and can provide certain motor drive profiles for predetermined positions of the stapler. The powered handle can include a manual return mechanism.Type: GrantFiled: February 27, 2019Date of Patent: July 20, 2021Assignee: Applied Medical Resources CorporationInventors: Erik D. Nelson, Jonathan R. Nash, Timothy M. Hopkins, Kevin Hudson, Andy Pham, Zachary W. Gyugyi, Joshua A. Spalding, Christian A. Halvorsen
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Publication number: 20190261984Abstract: A powered handle for a surgical stapler can have a drive system including an electric motor. The powered handle can include a manual articulation mechanism to articulate a jaw assembly coupled to a reload shaft connected to the handle. The manual articulation mechanism can include a ball screw mechanism that translates an articulation member responsive to rotation of an articulation knob when an instrument shaft is engaged with the handle. The articulation mechanism includes a release function that allows the jaw assembly to return to a longitudinally centered orientation. The powered handle includes a battery pack serving as a power supply for the drive system. A control system can control actuation of the motor based on user inputs and operating parameters of the stapler and can provide certain motor drive profiles for predetermined positions of the stapler. The powered handle can include a manual return mechanism.Type: ApplicationFiled: February 27, 2019Publication date: August 29, 2019Inventors: Erik D. Nelson, Jonathan R. Nash, Timothy M. Hopkins, Kevin Hudson, Andy Pham, Zachary W. Gyugyi, Joshua A. Spalding, Christian A. Halvorsen
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Patent number: 5337596Abstract: Apparatus for measuring permeability in rock samples comprising a measuring table (1, 41) for strapping down a rock sample (2), a nozzle (18) that can be pressed against the rock sample (2) at a set force, a gas source (23) connected to the nozzle (18), devices (24) for measuring mass flow through the nozzle and pressure in the nozzle. The apparatus comprises a rack (10,48) equipped with a pneumatic cylinder to which the nozzle is attached and where the rack and measuring table are movable in relation to each other in an X and Y direction via motors. A computer (21) that controls: (a) the motors, and thereby the movements of the nozzle and the measuring table relatively to each other so that the sample is covered by a predetermined measuring point pattern, (b) a mass flow meter (24) that controls and measures the gas flow to the nozzles, (c) a selector valve for compressed air that controls the pneumatic cylinder, and thereby the vertical movement of the nozzle.Type: GrantFiled: October 30, 1992Date of Patent: August 16, 1994Assignee: Den Norske Stats Oljeselskap A.SInventors: Christian Halvorsen, Jr., Andrew R. Hurst