Patents by Inventor Eric Cross
Eric Cross 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: 11099620Abstract: A fail-safe power limit (FSPL) can be applied to components that lose communication with a management module (MM) to determine a safe power level at which to operate. The FSPL may be computed by the management module (MM) for the information handling system and distributed to components in the information handling system. By computing a FSPL and transmitting the FSPL to the components, a larger amount of the available power can be used by the components. This allows the components to continue operating at performance levels closer to or equivalent to levels available when the management module (MM) is operating normally. The FSPL may be updated at set times and/or on a periodic schedule such that the FSPL used by the components when communication is lost with the management module (MM) reflects a recent operating state of the components.Type: GrantFiled: December 14, 2018Date of Patent: August 24, 2021Assignee: Dell Products L.P.Inventors: Douglas E. Messick, Kyle Eric Cross, Dan Rao, Shawn Joel Dube
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Publication number: 20200192451Abstract: A fail-safe power limit (FSPL) can be applied to components that lose communication with a management module (MM) to determine a safe power level at which to operate. The FSPL may be computed by the management module (MM) for the information handling system and distributed to components in the information handling system. By computing a FSPL and transmitting the FSPL to the components, a larger amount of the available power can be used by the components. This allows the components to continue operating at performance levels closer to or equivalent to levels available when the management module (MM) is operating normally. The FSPL may be updated at set times and/or on a periodic schedule such that the FSPL used by the components when communication is lost with the management module (MM) reflects a recent operating state of the components.Type: ApplicationFiled: December 14, 2018Publication date: June 18, 2020Applicant: Dell Products L.P.Inventors: Douglas E. Messick, Kyle Eric Cross, Dan Rao, Shawn Joel Dube
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Patent number: 8288922Abstract: An example flexoelectric-piezoelectric apparatus provides an electrical response to an applied force, and/or an actuation in response to an applied electric field, that originates from the flexoelectric properties of a component. For example, shaped forms within the apparatus may be configured to yield a stress gradient on application of the force, and the stress gradient induces the flexoelectric signal. A flexoelectric-piezoelectric apparatus can be substituted for a conventional piezoelectric apparatus, but does not require the use of a piezoelectric material. Instead, the response of the apparatus is due to the generation of stress gradients and/or field gradients.Type: GrantFiled: September 3, 2010Date of Patent: October 16, 2012Assignee: The Penn State Research FoundationInventors: L. Eric Cross, Wenyi Zhu, Nan Li, John Y. Fu, Baojin Chu
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Patent number: 8248262Abstract: An event recognition and response system includes an event sensor. An event recognition engine is coupled to the event sensor. An action profile database is coupled to the event recognition engine. The event recognition engine is operable to receive an event input from the event sensor, compare the event input to a plurality of action profiles in the action profile database and, upon determining that at least one action profile in the action profile database matches the event input, perform a predetermined action.Type: GrantFiled: August 11, 2009Date of Patent: August 21, 2012Assignee: Dell Products L.P.Inventors: Charles Delbert Robison, Jr., Douglas Evan Messick, Kyle Eric Cross
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Publication number: 20110037605Abstract: An event recognition and response system includes an event sensor. An event recognition engine is coupled to the event sensor. An action profile database is coupled to the event recognition engine. The event recognition engine is operable to receive an event input from the event sensor, compare the event input to a plurality of action profiles in the action profile database and, upon determining that at least one action profile in the action profile database matches the event input, perform a predetermined action.Type: ApplicationFiled: August 11, 2009Publication date: February 17, 2011Applicant: Dell Products L.P.Inventors: Charles Delbert Robison, JR., Douglas Evan Messick, Kyle Eric Cross
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Publication number: 20110006641Abstract: An example flexoelectric-piezoelectric apparatus provides an electrical response to an applied force, and/or an actuation in response to an applied electric field, that originates from the flexoelectric properties of a component. For example, shaped forms within the apparatus may be configured to yield a stress gradient on application of the force, and the stress gradient induces the flexoelectric signal. A flexoelectric-piezoelectric apparatus can be substituted for a conventional piezoelectric apparatus, but does not require the use of a piezoelectric material. Instead, the response of the apparatus is due to the generation of stress gradients and/or field gradients.Type: ApplicationFiled: September 3, 2010Publication date: January 13, 2011Applicant: The Penn State Research FoundationInventors: L. Eric Cross, Wenyi Zhu, Nan Li, John Y. Fu, Baojin Chu
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Patent number: 7791248Abstract: An example flexoelectric piezoelectric composite has a piezoelectric response, which may be a direct piezoelectric effect, a converse piezoelectric effect, both effects, or only one effect. The flexoelectric composite comprises a first material, which may be substantially isotropic, the first material being present in a shaped form. The shaped form gives a piezoelectric response due to a flexoelectric effect in the first material. The shaped form may have ?m symmetry, or a polar variant of this form such as 4 mm symmetry.Type: GrantFiled: June 28, 2007Date of Patent: September 7, 2010Assignee: The Penn State Research FoundationInventors: L. Eric Cross, Wenyi Zhu, Nan Li, John Y. Fu
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Publication number: 20090064476Abstract: An example flexoelectric piezoelectric material has a piezoelectric response, which may be a direct piezoelectric effect, a converse piezoelectric effect, both effects, or only one effect. A flexoelectric piezoelectric material comprises shaped elements of a material, which may be a substantially isotropic and centrosymmetric material. The shaped elements, such as cones, pyramids, wedges, or other tapered elements, may provide an electrical response in response to stress or strain gradients due to a flexoelectric effect in the material, and may provide a mechanical response in response to electric field gradients. Examples of the present invention include improved methods of fabricating devices comprising such shaped elements, and multi-layer devices having improved properties.Type: ApplicationFiled: July 25, 2008Publication date: March 12, 2009Applicant: The Penn State Research FoundationInventors: L. Eric Cross, Wenyi Zhu, Nan Li, John Y. Fu, Nadine B. Smith
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Patent number: 6376968Abstract: An electrical energy generator relying upon piezoelectricity includes electrical generating elements comprising electroded bodies of an electrostrictive material, e.g., polyurethane, having inherent but weak piezoelectric characteristics. A d.c. bias is applied between the electrodes for field-inducing a larger piezoelectric characteristic whereby, upon applying mechanical energy to the element, in known manner, for alternately straining and destraining the body, electrical charge is generated on the electrodes with a high mechanical energy to electrical energy conversion efficiency.Type: GrantFiled: May 8, 1998Date of Patent: April 23, 2002Assignee: Ocean Power Technologies, INCInventors: George W. Taylor, Joseph R. Burns, Charles B. Carroll, Eric Cross
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Patent number: 6175182Abstract: The present invention is a new type of high-strain, pseudo-shear mode piezoelectric ceramic actuator. The pseudo-shear mode actuator employs a stack of pre-poled rectangular ceramic sheets. The stacked sheets form a composite structure assembled from thin sheet soft PZT or PLZT which is poled in the usual direction normal to the major face of the sheet and driven by electrodes upon the major faces. The sheets are conductivity bonded at alternate ends and driven in such a way that alternate sheets expand and contract along the length dimension. Examples of uses would include actuators for linear and rotary motors; step and repeat (inchworm) type actuators; flow sensing and flow control; valving and pumping systems; active noise and vibration control; and large thin panel loudspeakers.Type: GrantFiled: March 18, 1998Date of Patent: January 16, 2001Assignee: Penn State Research FoundationInventors: L. Eric Cross, Jose Chirvella, Qing-Ming Wang
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Patent number: 5790156Abstract: A ferroelectric relaxor ceramic actuator material, such as lead magnesium niobate ("PMN"), has high electromechanical conversion efficiency, exhibits wide operating and manufacturing temperature ranges, does not require permanent polarization, and provides useful mechanical activity with reduced electrical drive voltages. A PMN actuator (66) may be bonded to an actuator diaphragm (64) with a high temperature soldering or brazing process. PMN material also has a diffuse Curie point range in which the dielectric constant (40), "d" coefficient (32), and dielectric loss (42) characteristics all rise to a peak and then fall as the temperature increases. A phase-change ink-jet print head (50) employs a PMN actuator that is compounded with lead titanate ("PT") to increase the temperature (T.sub.M) at which the peak dielectric constant occurs.Type: GrantFiled: April 22, 1997Date of Patent: August 4, 1998Assignee: Tektronix, Inc.Inventors: Jon C. Mutton, Hue P. Le, Qiming Zhang, Ronald L. Adams, L. Eric Cross, Thomas R. Shrout, Qiyue Chia Jiang
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Patent number: 5433917Abstract: Process for producing novel fluxed PZT dielectric ceramic compositions having sintering temperatures below about 1000.degree., so as to be non-reactive with electrode layers when co-fired therewith. The PZT is sintered with an effective amount of an eutectic mixture of CuO and an oxide of an alkaline earth metal, preferably barium oxide and/or strontium oxide, to reduce the sintering temperature of the PZT composition below about 1000.degree. C. Dopant such as manganese oxide may be added to reduce the dielectric losses.Type: GrantFiled: September 16, 1993Date of Patent: July 18, 1995Assignee: The Penn State Research FoundationInventors: Ashvin Srivastava, Amar Bhalla, L. Eric Cross
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Patent number: 4244652Abstract: An electronic ferroelectric length measuring transducer and system for obtaining information and read-in of that information visually to determine the length of an image as well as means to determine if a target is moving. These actions are done very quickly and accurately by changing the polarization of a ferroelectric substrate. In addition, the information, once obtained, can be stored indefinitely without recourse to any external stimuli circuitry, until readout.Type: GrantFiled: November 6, 1978Date of Patent: January 13, 1981Assignee: The United States of America as represented by the Secretary of the ArmyInventors: J. Louis Berger, L. Eric Cross
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Patent number: 4161109Abstract: A latchguard member is mounted on a rib needle bar assembly of a straight bar knitting machine of the Cotton's Patent type. The rib needles have latches which are pivotable between an open and closed attitude and the latchguard member is actuated to lie over the tips of the latches in the open attitude and to withdraw below the latches to permit them to close as the old loops are landed on the latches. In a preferred embodiment the actuating means for the latchguard member are arranged to superimpose a differential latchguard member and rib needle bar movement over their joint movement imparted by a needle bar actuating means.Type: GrantFiled: August 24, 1978Date of Patent: July 17, 1979Assignee: William Cotton LimitedInventor: Eric Cross