Patents by Inventor Daniel A. Walters
Daniel A. Walters 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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APPARATUS AND METHODS FOR OPTIMIZING INTRA CARDIAC FILLING PRESSURES, HEART RATE, AND CARDIAC OUTPUT
Publication number: 20160199554Abstract: Apparatus, systems, and methods are provided for optimizing intracardiac filling pressures and cardiac output in patients with heart failure, conduction disease, and atrial fibrillation. The system is able to adjust and optimize intracardiac filling pressures and cardiac output by adjusting heart rate and the effective amount of total body blood volume. The device includes an adjustable member that may create a mean pressure differential in order to manifest an effective “mechanical diuresis” by sequestering extraneous blood volume to the high-capacitance of the venous vasculature. The system is therefore designed to reduce intracardiac filling pressures while maintaining or even increasing cardiac output.Type: ApplicationFiled: January 14, 2015Publication date: July 14, 2016Inventors: Daniel Walter Kaiser, Clayton Allen Kaiser -
Publication number: 20160180291Abstract: A system for rating job transitions includes a probability determiner for determining a set of probabilities, a grouper for determining a group of job transition histories, a filter for determining a subset of job transition histories from the group of job transition histories by filtering based at least in part on a transition characteristic, a normalizer for determining a model set of job transition histories by normalizing the subset of job transition histories, a feature vector extractor for determining a set of feature vectors using the model set of job transition histories, a model builder for determining a model based at least in part on the set of feature vectors, and a rater for rating potential job transitions of a selected employee based on the model using a set of test feature vectors.Type: ApplicationFiled: December 22, 2014Publication date: June 23, 2016Inventors: Daniel Walter Beck, Mohammad Sabah, Adeyemi Ajao, James Fan, Parag Avinash Namjoshi, Vivek Tawde
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Publication number: 20160180264Abstract: A system for determining retention risk comprises a grouper, a filter, a normalizer, a feature vector extractor, a model builder, and a predictor. The grouper is for determining a set of time series of transactions where each is associated with one employee. The filter is for filtering the set of time series of transactions based on an employee transition characteristic to determine a subset of time series. The normalizer is for determining a model set of time series by normalizing the subset of time series. The feature vector extractor is for determining a set of feature vectors determined from a time series of the model set of time series. The model builder is for determining one or more models based at least in part on the set of feature vectors. The predictor is for predicting retention risk for a given employee using the one or more models.Type: ApplicationFiled: December 22, 2014Publication date: June 23, 2016Inventors: Daniel Walter Beck, Mohammad Sabah, Adeyemi Ajao, James Fan, Parag Avinash Namjoshi, Kevin Mun Joun Tham, Vladimir Giverts
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Publication number: 20160082167Abstract: Disclosed herein are heart pumps that can include a catheter body and an impeller coupled with a distal end of the catheter body. The impeller can include a tip that is resealable or that includes a resealable member. The heart pump can also include a diffuser disposed between the distal end of the catheter body and the impeller, wherein the diffuser includes a flow directing surface.Type: ApplicationFiled: September 18, 2015Publication date: March 24, 2016Inventors: Robert L. Campbell, Jeremy J. Koncoski, Thomas M. Mallison, Mark W. McBride, Daniel Metrey, Eric C. Myer, Kevin J. Powell, Adam Roslund, Daniel A. Walters, William James Repka, Phyllis Yuen
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Patent number: 9290888Abstract: Rail-fastening system for the non-positive resilient fastening of a rail (2) on a sleeper (1) of a railway track installation, comprising at least one angle guide plate (5), which can be fixed to the sleeper (1) with at least one screw (4), and at least one clamp (3), characterized in that the bending radii of the clamp arms (3a, 3b) of the clamp (3) preferably lie in the range from 18-70 mm, wherein the ratio of mutually adjacent bending radii within each clamping arm is ?1.9 and the ratio of the greatest to the smallest bending radius thereof is ?3.8, and in that the ratio of weight to width of the angle guide plate is <1.3 g/mm, preferably about 1.25 g/mm.Type: GrantFiled: June 11, 2012Date of Patent: March 22, 2016Assignee: SCHWIHAG AGInventors: Stefan Lienhard, Daniel Walter, Erik Danneberg, Roland Buda
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Publication number: 20160030743Abstract: Apparatus, systems and methods are provided for prevention and/or remediation of cardiac arrhythmias, e.g. optimizing anti-tachycardia pacing (ATP) algorithms. More particularly, implantable devices are provided that measure and treat cardiac arrhythmias. By monitoring the ATP attempt from additional electrodes, far-field morphology analyses, and/or measuring the return interval from a failed ATP attempt; the devices may estimate when entrainment has occurred, the amount of delay within the reentrant tachycardia, and/or tachycardia termination/acceleration. These variables and occurrences can be used to optimize the first and/or subsequent ATP attempts. Furthermore, other exemplary embodiments describe methods to integrate electrical restitution properties into the design of ATP pacing algorithms to facilitate tachycardia termination.Type: ApplicationFiled: July 28, 2015Publication date: February 4, 2016Inventor: Daniel Walter Kaiser
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Patent number: 9138518Abstract: Disclosed herein are heart pumps that can include a catheter body and an impeller coupled with a distal end of the catheter body. The impeller can include a tip that is resealable or that includes a resealable member. The heart pump can also include a diffuser disposed between the distal end of the catheter body and the impeller, wherein the diffuser includes a flow directing surface.Type: GrantFiled: January 6, 2012Date of Patent: September 22, 2015Assignees: THORATEC CORPORATION, THE PENN STATE RESEARCH FOUNDATIONInventors: Robert L. Campbell, Jeremy J. Koncoski, Thomas M. Mallison, Mark W. McBride, Daniel Metrey, Eric C. Myer, Kevin J. Powell, Adam Roslund, Daniel A. Walters, William James Repka, Phyllis Yuen
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Publication number: 20150136865Abstract: The invention relates to a rail attachment system (1) for attaching a rail (2) to a concrete support slab (3a) or a concrete sleeper (3b) or to a steel structure comprising an intermediate plate (4), a rail attachment plate (5) with angle guide plates (6, 6b) arranged thereon, at least two first tensioning clamps (7a) for clamping the rail foot (2a) to the rail attachment plate (5) as well as screws (9) and/or ankle bolts (10) and at least two second tensioning clamps for screwing the rail attachment system (1) to the underlying surface, characterized in that an elastic intermediate layer (8) is arranged between the rail (2) and the rail attachment plate (5), and the intermediate plate (4) is composed of a highly elastic material and/or comprises a steel plate (4), at least two second tensioning clamps (7b) for clamping the rail attachment plate (5) to the substructure, preferably via the intermediate plate (4), wherein the first and second tensioning clamps (7a, 7b) are embodied in a highly elastic fashion wType: ApplicationFiled: July 23, 2013Publication date: May 21, 2015Inventors: Daniel Walter, Stefan Lienhard, Erik Danneberg, Roland Buda
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Publication number: 20140103132Abstract: Rail-fastening system for the non-positive resilient fastening of a rail (2) on a sleeper (1) of a railway track installation, comprising at least one angle guide plate (5), which can be fixed to the sleeper (1) with at least one screw (4), and at least one clamp (3), characterized in that the bending radii of the clamp arms (3a, 3b) of the clamp (3) preferably lie in the range from 18-70 mm, wherein the ratio of mutually adjacent bending radii within each clamping arm is ?1.9 and the ratio of the greatest to the smallest bending radius thereof is ?3.8, and in that the ratio of weight to width of the angle guide plate is <1.3 g/mm, preferably about 1.25 g/mm.Type: ApplicationFiled: June 11, 2012Publication date: April 17, 2014Applicant: SCHWIHAG AGInventors: Stefan Lienhard, Daniel Walter, Erik Danneberg, Roland Buda
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Patent number: 8684904Abstract: A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.Type: GrantFiled: August 15, 2013Date of Patent: April 1, 2014Assignees: Thoratec Corporation, The Penn State Research FoundationInventors: Robert L. Campbell, Justin M. Walsh, Daniel Metrey, Robert F. Kunz, Thomas M. Mallison, Edward Boone, Eric Myer, Mark W. McBride, Kevin J. Powell, Daniel A. Walters
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Publication number: 20130331639Abstract: A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.Type: ApplicationFiled: August 15, 2013Publication date: December 12, 2013Applicants: Thoratec Corporation, The Penn State Research FoundationInventors: Robert L. Campbell, Justin M. Walsh, Daniel Metrey, Robert F. Kunz, Thomas M. Mallison, Edward Boone, Eric Meyer, Mark W. McBride, Kevin J. Powell, Daniel A. Walters
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Patent number: 8597170Abstract: A heart pump and a catheter assembly therefor are provided that include a flexible catheter body having a proximal end and a distal end, the catheter body having a plurality of lumens therethrough. The catheter body can be sufficiently flexible to extend from a peripheral access to a patient's heart. The catheter assembly can also include an impeller assembly having an impeller and a housing. The impeller assembly can be coupled with the flexible catheter body such that a tensile force applied to opposite ends of the catheter assembly enhances the security of the connection between the catheter body and the impeller assembly.Type: GrantFiled: January 4, 2012Date of Patent: December 3, 2013Assignees: Thoratec Corporation, The Penn State Research FoundationInventors: Daniel A. Walters, William James Repka, Kevin J. Powell, Richard L. Keenan, Justin M. Walsh, Robert L. Campbell, Mark W. McBride
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Patent number: 8591393Abstract: A heart pump is provided that comprises an elongate catheter body, an impeller disposed at the distal end of the elongate catheter body, and one or more bearings positioned between the catheter body and the impeller. A fluid supply line for delivering infusant into the catheter is provided. A fluid return line for transporting infusant out of the catheter is also provided. A pump assembly for regulating the infusant flow along the fluid supply line and fluid return line is provided as part of an infusion system.Type: GrantFiled: January 5, 2012Date of Patent: November 26, 2013Assignee: Thoratec CorporationInventors: Daniel A. Walters, William James Repka, Brian A. Prais, Jonathan R. Williams
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Patent number: 8535211Abstract: A blood pump includes an impeller having a plurality of foldable blades and a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller can reside in the expandable portion of the cannula. The cannula has a collapsed condition for percutaneous delivery to a desired location within the body, and an expanded condition in which the impeller can rotate to pump blood. A flexible drive shaft can extend through the cannula for rotationally driving the impeller within the patient's body.Type: GrantFiled: July 1, 2010Date of Patent: September 17, 2013Assignees: Thoratec Corporation, The Penn State Research FoundationInventors: Robert L. Campbell, Justin M. Walsh, Daniel Metrey, Robert F. Kunz, Thomas M. Mallison, Edward Boone, Eric Myer, Mark W. McBride, Kevin J. Powell, Daniel A. Walters
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Patent number: 8485961Abstract: Disclosed herein are heart pumps that include a catheter assembly and that can be applied percutaneously. Some embodiments include a locking device that prevents components of the catheter assembly from being separated when in use. The catheter assembly can include an expandable tip. In some embodiments, the catheter assembly includes a housing having a wall structure, a portion of which can have a bulbuous shape or can be deformable. In other embodiments, the housing can be configured to reduce fluttering or deflection of the housing and/or to maintain a gap between the housing and an impeller blade disposed therein.Type: GrantFiled: January 4, 2012Date of Patent: July 16, 2013Assignees: Thoratec Corporation, The Penn State Research FoundationInventors: Robert L. Campbell, Keif Fitzgerald, William James Harrison, Boris Leschinsky, Thomas M. Mallison, Mark W. McBride, Adam Roslund, Daniel A. Walters, Phyllis Yuen
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Publication number: 20120243667Abstract: Systems and methods for making and using a light with an X-ray imaging arm are described. The light can be configured to have a light source that is disposed around at least a portion of a perimeter of an X-ray imaging arm's X-ray source and/or X-ray detector. The light source can be positioned to direct its light to a field of view that is located between the X-ray source and the X-ray detector. The light can comprise a light source, a switching mechanism, and wiring to connect the light source and switching mechanism to a power source, such as a battery. The light can be electrically connected into the imaging arm or can be part of an accessory that can be retrofitted to the imaging arm. Other embodiments are described.Type: ApplicationFiled: March 25, 2011Publication date: September 27, 2012Inventor: Daniel A. Walters
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Patent number: 8260487Abstract: Methods and systems for a vital bus system for communicating data in a control system are provided. The system includes a plurality of data communication buses configured in a multiple redundant orientation and at least one safety supervisor module including a database including a plurality of logic rules. The logic rules are programmed to receive data from the plurality of data communication buses and to determine the validity of the received data from each bus using one or more of the plurality of the logic rules. If the received data is invalid, the logic rules are programmed to restore the validity of the data using one or more of the plurality of the logic rules. If the data can not be restored the logic rules are programmed to transmit an alert to the control system. Otherwise, the logic rules are programmed to transmit the validated data to an intended destination.Type: GrantFiled: January 8, 2008Date of Patent: September 4, 2012Assignee: General Electric CompanyInventor: Daniel Walter Plawecki
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Publication number: 20120178986Abstract: Disclosed herein are heart pumps that can include a catheter body and an impeller coupled with a distal end of the catheter body. The impeller can include a tip that is resealable or that includes a resealable member. The heart pump can also include a diffuser disposed between the distal end of the catheter body and the impeller, wherein the diffuser includes a flow directing surface.Type: ApplicationFiled: January 6, 2012Publication date: July 12, 2012Inventors: Robert L. Campbell, Jeremy J. Koncoski, Thomas M. Mallison, Mark W. McBride, Daniel Metrey, Eric C. Myer, Kevin J. Powell, Adam Roslund, Daniel A. Walters, William James Repka, Phyllis Yuen
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Publication number: 20120178985Abstract: A heart pump is provided that comprises an elongate catheter body, an impeller disposed at the distal end of the elongate catheter body, and one or more bearings positioned between the catheter body and the impeller. A fluid supply line for delivering infusant into the catheter is provided. A fluid return line for transporting infusant out of the catheter is also provided. A pump assembly for regulating the infusant flow along the fluid supply line and fluid return line is provided as part of an infusion system.Type: ApplicationFiled: January 5, 2012Publication date: July 12, 2012Inventors: Daniel A. Walters, William James Repka, Brian A. Prais, Jonathan R. Williams
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Patent number: D767118Type: GrantFiled: May 13, 2015Date of Patent: September 20, 2016Assignee: MAQUET CARDIOPULMONARY GmbHInventors: Aidan Hyde, William James Repka, Daniel A. Walters, Roland Hopp, Thomas Märzke, Manfred Held