Patents by Inventor Alan Lehmann
Alan Lehmann 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: 20240091008Abstract: Delivery devices for delivering a stented prosthesis to a target site are disclosed. Certain disclosed delivery devices include a handle assembly including an actuator, a shaft assembly interconnected to the handle assembly, and are configured to releasably retain the stented prosthesis to the delivery device with at least one elongate tension member. The delivery devices further include a torque shaft that is configured to apply and adjust the amount of tension in the each tension member. For example, the torque shaft can be configured to wind and unwind each elongate tension member around the torque shaft to correspondingly compress and expand the stented prosthesis. The torque shaft can be controlled with an actuator provided in the handle assembly, for example. In some embodiments, the actuator is further configured to axially move the torque shaft.Type: ApplicationFiled: November 27, 2023Publication date: March 21, 2024Inventors: Alan McGuinn, Luke Lehmann, Wayne Falk
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Publication number: 20150332830Abstract: A thermal shield for a superconducting magnet includes a shield body having an annular shape. The shield body includes a material having a thermal conductivity greater than about 1000 W/m·K at about 70K.Type: ApplicationFiled: July 27, 2015Publication date: November 19, 2015Inventors: Longzhi Jiang, Gregory Alan Lehmann, Neil Clarke
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Publication number: 20120095841Abstract: A computer-implemented system for consumers and suppliers of energy provides an on-line marketplace where energy consumers may learn about their options for obtaining energy and enter contracts with energy suppliers. Energy suppliers may use the system to learn about other suppliers as well as consumers, and to extend offers to consumers for the provision of energy. The system gathers data on suppliers and consumers from numerous reliable sources, and thus provides a content-rich environment that facilitates consumer choice in the selection of energy suppliers.Type: ApplicationFiled: October 13, 2011Publication date: April 19, 2012Inventors: Douglas Luckerman, Alan Lehmann
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Patent number: 8033121Abstract: A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.Type: GrantFiled: October 7, 2008Date of Patent: October 11, 2011Assignee: General Electric CompanyInventors: Xianrui Huang, Paul Shadforth Thompson, David Thomas Ryan, Gregory Alan Lehmann, Timothy John Havens
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Publication number: 20100128848Abstract: An x-ray tube having a liquid lubricated bearing assembly and a liquid cooled anode target. The anode target and bearing assembly having increased lubrication and cooling to withstand higher power, higher temperature and higher load applications.Type: ApplicationFiled: November 21, 2008Publication date: May 27, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Liangheng Qiu, Gregory Alan Lehmann, Thomas Dean Scaefer, Michael Scott Hebert, Edwin L. Legall
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Publication number: 20090033450Abstract: A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.Type: ApplicationFiled: October 7, 2008Publication date: February 5, 2009Applicant: GENERAL ELECTRIC COMPANYInventors: Xianrui Huang, Paul Shadforth Thompson, David Thomas Ryan, Gregory Alan Lehmann, Timothy John Havens
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Patent number: 7464558Abstract: A low eddy current cryogen circuit for superconducting magnets including at least a first cooling coil made of an electrically conducting material and having at least one electrical isolator incorporated in the first cooling coil. The electrical isolator is located to inhibit induced eddy current loops due to inductive coupling of the first cooling coil with eddy current inducing field sources.Type: GrantFiled: November 19, 2003Date of Patent: December 16, 2008Assignee: General Electric CompanyInventors: Xianrui Huang, Paul Shadforth Thompson, David Thomas Ryan, Gregory Alan Lehmann, Timothy John Havens
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Patent number: 7348777Abstract: A magnetic resonance imaging magnet assembly is provided. The assembly comprises a outer thermal shield having an operational temperature. The assembly further includes a cold sleeve assembly comprising a plurality of braid elements mounted to a cooler block and a highly thermally conductive block mounted between the cooler block and the outer thermal shield. The highly thermally conductive block is welded to the outer thermal shield and is welded to the cooler block. The highly thermally conductive block has greater thermal conductance than the outer thermal shield.Type: GrantFiled: April 5, 2004Date of Patent: March 25, 2008Assignee: General Electric CompanyInventors: Longzhi Jiang, Gregory Alan Lehmann, Clifford Joseph Ginfrida
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Patent number: 7170377Abstract: A zero boiloff cryogen cooled recondensing superconducting magnet assembly including superconducting magnet coils suitable for magnetic resonance imaging including a cryogen pressure vessel to contain a liquid cryogen reservoir to provide cryogenic temperatures to the magnet coils for superconducting operation; a vacuum vessel surrounding the pressure vessel and spaced therefrom; a first thermal shield surrounding and spaced from the pressure vessel; a second thermal shield surrounding and spaced from the first thermal shield and intermediate the vacuum vessel and the first shield; a cryocooler thermally connected by a first and a second thermal interface to the first and second thermal shields, respectively; a recondenser positioned in the space between the pressure vessel and the first thermal shield and thermally connected by a thermal interface to the cryocooler to recondense, back to liquid, cryogen gas provided from the pressure vessel; and means for returning the recondensed liquid cryogen the pressureType: GrantFiled: July 28, 2004Date of Patent: January 30, 2007Assignee: General Electric CompanyInventors: Longzhi Jiang, Gregory Alan Lehmann, Edwin Lawrence Legall
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Patent number: 6289681Abstract: A multi purpose interconnect assembly between upper and lower helium vessels in a recondensing superconducting magnet to provide isothermal connections to extend the ride-through period, and to provide for helium liquid and gas passage, electrical interconnections, and to accommodate differential thermal contraction and expansion.Type: GrantFiled: November 17, 1999Date of Patent: September 18, 2001Assignee: General Electric CompanyInventors: Phillip William Eckels, Richard Thomas Hackett, Gregory F. Hayworth, Xianrui Huang, Clifford J. Ginfrida, Gregory Alan Lehmann, John Scaturro, Jr., Bu-Xin Xu
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Patent number: 6166617Abstract: A magnet pole piece assembly has first and second pole pieces and at least one support member. The pole pieces have longitudinally aligned and facing surface recesses. The support member has a central segment and first and second end segments abuttingly and metallurgically attached to the central segment. The first and second end segments are positioned within a corresponding surface recess of the first and second pole piece and are abuttingly and metallurgically attached to the corresponding pole piece. An open magnet adds main coils to the magnet pole piece assembly.Type: GrantFiled: November 9, 1999Date of Patent: December 26, 2000Assignee: General Electric CompanyInventors: Evangelos Trifon Laskaris, James Pellegrino Alexander, Delton Andrews Grey, Jr., Greg Alan Lehmann
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Patent number: 6150912Abstract: A magnet cartridge for an open architecture superconducting magnet including an iron ring sandwiched between two coil forms, and including radial and axial positioning and securing apparatus to position, secure and maintain the relative positions of the coils on the coil forms and the iron ring in the presence of the strong superconducting magnet field generated by superconducting operation of said magnet.Type: GrantFiled: November 15, 1999Date of Patent: November 21, 2000Assignee: General Electric CompanyInventors: Stephen R. Elgin, II, Kenneth Edward Grut, Gregory Alan Lehmann, Michelle Guilmet Sansbury, John Scaturro, Jr., Bu-Xin Xu
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Patent number: 6147579Abstract: A non-uniform multi-layer thermally insulating blanket assembly for use in a superconducting magnet in the tapered space between the thermal radiation shield and a conical support assembly includes three steps at different thicknesses provided by multiple blankets with layer staking and blanket positioning.Type: GrantFiled: November 17, 1999Date of Patent: November 14, 2000Assignee: General Electric CompanyInventors: William Louis Einziger, Xianrui Huang, Gregory Alan Lehmann, John Arthur Urbahn
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Patent number: 5718034Abstract: A new design for an aluminum stabilized superconductor which embeds the superconducting cable within a high purity aluminum stabilizer. This stabilizer is, in turn, partially surrounded by an aluminum alloy sheath. The aluminum alloy sheath is constructed and arranged so that at least one exterior surface of the stabilizer is open for exposure to a coolant. Preferably, this open exterior surface of the stabilizer will be knurled for greater cooling efficiency.Type: GrantFiled: September 12, 1996Date of Patent: February 17, 1998Assignee: The Babcock & Wilcox CompanyInventors: Xianrui Huang, Gregory Alan Lehmann, Yury Lvovsky, Ronald Glenn Wood