Patents by Inventor William R. Lindberg
William R. Lindberg 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: 7418876Abstract: A shear stress sensor for measuring fluid wall shear stress on a test surface is provided. The wall shear stress sensor is comprised of an active sensing surface and a sensor body. An elastic mechanism mounted between the active sensing surface and the sensor body allows movement between the active sensing surface and the sensor body. A driving mechanism forces the shear stress sensor to oscillate. A measuring mechanism measures displacement of the active sensing surface relative to the sensor body. The sensor may be operated under periodic excitation where changes in the nature of the fluid properties or the fluid flow over the sensor measurably changes the amplitude or phase of the motion of the active sensing surface, or changes the force and power required from a control system in order to maintain constant motion.Type: GrantFiled: May 20, 2004Date of Patent: September 2, 2008Inventors: William D. Armstrong, Jonathan Naughton, William R. Lindberg
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Publication number: 20040079840Abstract: An aircraft lift control system mounted on an aircraft is provided. The aircraft has at least one wing. The aircraft lift control system comprises an oscillating aero surface mounted to the aircraft wing. A resonant frame is connected to the oscillating aero surface. An actuator is mounted to the resonant frame wherein the sinusoidal force produced by the actuator on the resonant frame results in a resonant deformation in the resonant frame and resonant-sinusoidal displacement of the aero-surface.Type: ApplicationFiled: September 30, 2003Publication date: April 29, 2004Inventors: William D. Armstrong, William R. Lindberg, Jonathan W. Naughton, John E. McInroy
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Publication number: 20030192593Abstract: The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. A typical cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation.Type: ApplicationFiled: May 6, 2003Publication date: October 16, 2003Applicant: Bighorn Valve, Inc.Inventors: David E. Walrath, William R. Lindberg, Robert K. Burgess
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Patent number: 6557576Abstract: An axially-rotated valve permitting increased flow rates and lower pressure drop is disclosed using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. A cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity. Applications are disclosed for freeze resistant axially-rotated valves which may be fully-opened and fully-closed in one-half of a complete rotation. An internal wide radius elbow connected to a rotatable portion of the eccentric venturi may assist in directing flow with lower friction losses. A valve actuator may actuate in an axial manner located outside of the axial flow path. A seat may be used between the two portions that may include a peripheral and diametrical seal in the same plane.Type: GrantFiled: August 27, 2001Date of Patent: May 6, 2003Assignee: Big Horn Valve, Inc.Inventors: David E. Walrath, William R. Lindberg, Robert K. Burgess
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Publication number: 20020005218Abstract: The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. A typical cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation.Type: ApplicationFiled: August 27, 2001Publication date: January 17, 2002Applicant: Bighorn Valve, Inc.Inventors: David E. Walrath, William R. Lindberg, Robert K. Burgess
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Patent number: 6279595Abstract: The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. A typical cross section of the eccentric split venturi may be nonaxisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation.Type: GrantFiled: July 19, 2000Date of Patent: August 28, 2001Assignee: Big Horn Valve, Inc.Inventors: David E. Walrath, William R. Lindberg, Robert K. Burgess
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Patent number: 6109293Abstract: The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. A typical cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation.Type: GrantFiled: September 8, 1997Date of Patent: August 29, 2000Assignee: Big Horn Valve, Inc.Inventors: David E. Walrath, William R. Lindberg, Robert K. Burgess
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Patent number: 6026845Abstract: The present invention provides an axially-rotated valve which permits increased flow rates and lower pressure drop (characterized by a lower loss coefficient) by using an axial eccentric split venturi with two portions where at least one portion is rotatable with respect to the other portion. The axially-rotated valve typically may be designed to avoid flow separation and/or cavitation at full flow under a variety of conditions. Similarly, the valve is designed, in some embodiments, to produce streamlined flow within the valve. An axially aligned outlet may also increase the flow efficiency. A typical cross section of the eccentric split venturi may be non-axisymmetric such as a semicircular cross section which may assist in both throttling capabilities and in maximum flow capacity using the design of the present invention. Such a design can include applications for freeze resistant axially-rotated valves and may be fully-opened and fully-closed in one-half of a complete rotation.Type: GrantFiled: July 23, 1998Date of Patent: February 22, 2000Assignee: Bighorn Valve, Inc.Inventors: David E. Walrath, William R. Lindberg, Robert K. Burgess, James LaBelle