Patents by Inventor David A. Kienholz
David A. Kienholz 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: 9175467Abstract: A tuned mass damper may be formed using one or more rotary magnetic dampers (108) coupled to a pendulous mass (102). The tuned mass damper thus formed may be used to suppress the motion of a man-made structure. The mass (308) of the tuned mass damper may be adjusted by adjusting the magnitude of the pendulous mass. The natural frequency of the tuned mass damper may be tuned by adjusting the distance from the mass center of the pendulous mass to the pivot point of the pendulum. The motion being suppressed may be generated by environmental factors such as waves, earthquakes, or wind, for example.Type: GrantFiled: March 4, 2011Date of Patent: November 3, 2015Assignee: Moog Inc.Inventors: David A. Kienholz, Bernard R. Jahn
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Publication number: 20130326969Abstract: A tuned mass damper may be formed using one or more rotary magnetic dampers (108) coupled to a pendulous mass (102). The tuned mass damper thus formed may be used to suppress the motion of a man-made structure. The mass (308) of the tuned mass damper may be adjusted by adjusting the magnitude of the pendulous mass. The natural frequency of the tuned mass damper may be tuned by adjusting the distance from the mass center of the pendulous mass to the pivot point of the pendulum. The motion being suppressed may be generated by environmental factors such as waves, earthquakes, or wind, for example.Type: ApplicationFiled: March 4, 2011Publication date: December 12, 2013Applicant: Moog Inc.Inventors: David A. Kienholz, Bernard R. Jahn
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Patent number: 7051850Abstract: The invention disclosed is a compact and lightweight hybrid pneumatic-magnetic isolator-actuator capable of large force, substantial stroke and bandwidth actuation with near frictionless operation and vibration isolation with very low break frequency. Pneumatic and magnetic forces are applied to a single carriage comprised primarily of a coaxially arranged air piston and coil. The carriage is driven relative to a frame or housing including an internally mounted cylindrical piston sleeve and magnetic actuator body. A combination of air bearings and air bearing piston construction provide for frictionless motion of the carriage relative to the frame. The pneumatic piston provides the actuation force for both static loads and low frequency dynamic loads. An integrally mounted sensor and control unit determine the pressure error resulting at the pneumatic piston.Type: GrantFiled: November 21, 2003Date of Patent: May 30, 2006Assignee: CSA Engineering, Inc.Inventor: David A. Kienholz
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Patent number: 6959795Abstract: The invention disclosed is a compact and lightweight hybrid pneumatic-magnetic isolator-actuator capable of large force, substantial stroke and bandwidth actuation with near frictionless operation and vibration isolation with very low break frequency. Pneumatic and magnetic forces are applied to a single carriage comprised primarily of a coaxially arranged air piston and coil. The carriage is driven relative to a frame or housing including an internally mounted cylindrical piston sleeve and magnetic actuator body. A combination of air bearings and air bearing piston construction provide for frictionless motion of the carriage relative to the frame. The pneumatic piston provides the actuation force for both static loads and low frequency dynamic loads. An integrally mounted sensor and control unit determine the pressure error resulting at the pneumatic piston.Type: GrantFiled: February 20, 2002Date of Patent: November 1, 2005Assignee: CSA Engineering, Inc.Inventor: David A. Kienholz
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Patent number: 6942202Abstract: The invention disclosed is a compact and lightweight hybrid pneumatic-magnetic isolator-actuator capable of large force, substantial stroke and bandwidth actuation with near frictionless operation and vibration isolation with very low break frequency. Pneumatic and magnetic forces are applied to a single carriage comprised primarily of a coaxially arranged air piston and coil. The carriage is driven relative to a frame or housing including an internally mounted cylindrical piston sleeve and magnetic actuator body. A combination of air bearings and air bearing piston construction provide for frictionless motion of the carriage relative to the frame. The pneumatic piston provides the actuation force for both static loads and low frequency dynamic loads. An integrally mounted sensor and control unit determine the pressure error resulting at the pneumatic piston.Type: GrantFiled: November 21, 2003Date of Patent: September 13, 2005Assignee: CSA Engineering, Inc.Inventor: David A. Kienholz
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Publication number: 20040099783Abstract: The invention disclosed is a compact and lightweight hybrid pneumatic-magnetic isolator-actuator capable of large force, substantial stroke and bandwidth actuation with near frictionless operation and vibration isolation with very low break frequency. Pneumatic and magnetic forces are applied to a single carriage comprised primarily of a coaxially arranged air piston and coil. The carriage is driven relative to a frame or housing including an internally mounted cylindrical piston sleeve and magnetic actuator body. A combination of air bearings and air bearing piston construction provide for frictionless motion of the carriage relative to the frame. The pneumatic piston provides the actuation force for both static loads and low frequency dynamic loads. An integrally mounted sensor and control unit determine the pressure error resulting at the pneumatic piston.Type: ApplicationFiled: November 21, 2003Publication date: May 27, 2004Inventor: David A. Kienholz
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Publication number: 20040099784Abstract: The invention disclosed is a compact and lightweight hybrid pneumatic-magnetic isolator-actuator capable of large force, substantial stroke and bandwidth actuation with near frictionless operation and vibration isolation with very low break frequency. Pneumatic and magnetic forces are applied to a single carriage comprised primarily of a coaxially arranged air piston and coil. The carriage is driven relative to a frame or housing including an internally mounted cylindrical piston sleeve and magnetic actuator body. A combination of air bearings and air bearing piston construction provide for frictionless motion of the carriage relative to the frame. The pneumatic piston provides the actuation force for both static loads and low frequency dynamic loads. An integrally mounted sensor and control unit determine the pressure error resulting at the pneumatic piston.Type: ApplicationFiled: November 21, 2003Publication date: May 27, 2004Inventor: David A. Kienholz
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Publication number: 20030155194Abstract: The invention disclosed is a compact and lightweight hybrid pneumatic-magnetic isolator-actuator capable of large force, substantial stroke and bandwidth actuation with near frictionless operation and vibration isolation with very low break frequency. Pneumatic and magnetic forces are applied to a single carriage comprised primarily of a coaxially arranged air piston and coil. The carriage is driven relative to a frame or housing including an internally mounted cylindrical piston sleeve and magnetic actuator body. A combination of air bearings and air bearing piston construction provide for frictionless motion of the carriage relative to the frame. The pneumatic piston provides the actuation force for both static loads and low frequency dynamic loads. An integrally mounted sensor and control unit determine the pressure error resulting at the pneumatic piston.Type: ApplicationFiled: February 20, 2002Publication date: August 21, 2003Inventor: David A. Kienholz
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Patent number: 6510733Abstract: A tire testing machine (10) comprising a movable simulated road surface (14), an axle (16) including a bearing surface (22) around which a tire/wheel assembly (T) can rotate; and a frame (18) which supports the axle (16) in a non-rotatable but vertically floatable manner relative to the simulated road surface (14) whereby the tire/wheel assembly (T) can be loaded in rolling engagement against the simulated road surface (14). The frame (18) comprises tie members (26) which extend from the axle (16) to a stationary support (28) in a geometrically sturdy (e.g., triangular) arrangement and non-damping piston members (30) which are interposed between the tie members (26) and the stationary support (28). The geometrically sturdy arrangement of the tie members (26) can be an isosceles triangular arrangement and the simulated road surface (14) can comprise the outer circumferential surface of a road wheel (20).Type: GrantFiled: August 31, 2001Date of Patent: January 28, 2003Assignee: Bridgestone/Firestone North American Tire, LLCInventors: Scott J. Coe, David A. Kienholz
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Publication number: 20020083762Abstract: A tire testing machine (10) comprising a movable simulated road surface (14), an axle (16) including a bearing surface (22) around which a tire/wheel assembly (T) can rotate; and a frame (18) which supports the axle (16) in a non-rotatable but vertically floatable manner relative to the simulated road surface (14) whereby the tire/wheel assembly (T) can be loaded in rolling engagement against the simulated road surface (14). The frame (18) comprises tie members (26) which extend from the axle (16) to a stationary support (28) in a geometrically sturdy (e.g., triangular) arrangement and non-damping piston members (30) which are interposed between the tie members (26) and the stationary support (28). The geometrically sturdy arrangement of the tie members (26) can be an isosceles triangular arrangement and the simulated road surface (14) can comprise the outer circumferential surface of a road wheel (20).Type: ApplicationFiled: August 31, 2001Publication date: July 4, 2002Inventors: Scott J. Coe, David A. Kienholz
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Patent number: 6196514Abstract: The present invention provides a vibration isolation system. The Airborne Stabilization/Vibration Isolation System (AS/VIS) is a combination of advanced pneumatic passive suspension, high-capacity voice-coil actuators, integrated sensors, a control processor and a commercial system of software development tools. The entire vertical weight load is borne by the pneumatic mounts. Vertical payload motion is accommodated with little or no friction through the use of air bearings at all sliding surfaces of the mounts. The high-force voice-coil actuators provide a variety of performance enhancements to the passive isolation system. Primarily, they allow control of the payload mean position in the presence of low-frequency quasistatic load variations due to aircraft maneuvering. Horizontal and vertical displacement sensors detect the position of each actuator moving element relative to ground. The controller sends a signal to power amplifiers, which drive the horizontal and vertical voice-coil actuators.Type: GrantFiled: September 18, 1998Date of Patent: March 6, 2001Assignee: CSA Engineering, Inc.Inventor: David A. Kienholz