Patents by Inventor David A. Beavers
David A. Beavers 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: 20230390472Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater element.Type: ApplicationFiled: August 7, 2023Publication date: December 7, 2023Applicant: DEKA Products Limited PartnershipInventors: David A. Beavers, Michael G. Norris, John M. Kerwin, Andrew S. Coll, Paul G. Girouard, Robert J. Bryant, JR., Geoffrey P. Spencer, Joseph P. Rushlow, Jacob W. Scarpaci
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Patent number: 11752248Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater element.Type: GrantFiled: January 14, 2019Date of Patent: September 12, 2023Assignee: DEKA Products Limited PartnershipInventors: David A. Beavers, Michael G. Norris, John M. Kerwin, Andrew S. Coll, Paul G. Girouard, Robert J. Bryant, Jr., Geoffrey P. Spencer, Joseph P. Rushlow, Jacob W. Scarpaci
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Publication number: 20220409875Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber.Type: ApplicationFiled: July 19, 2022Publication date: December 29, 2022Applicant: DEKA Products Limited PartnershipInventors: Andrew S. Coll, Paul G. Girouard, Jacob W. Scarpaci, Geoffrey P. Spencer, David A. Beavers, Daniel B. Singer, David B. Doherty
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Patent number: 11400272Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of an apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of the diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber.Type: GrantFiled: August 24, 2018Date of Patent: August 2, 2022Assignee: DEKA Products Limited PartnershipInventors: Michael G. Norris, Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore, David B. Doherty, Edgar J. Bolton, Jinsun Yoo, Paul G. Girouard, Daniel S. Karol, Daniel B. Singer, Joseph P. Rushlow
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Patent number: 11290804Abstract: This invention is a Sound Control Ear Cup in the form of an externally fitted ear cupping device fitted to the contour of the ear for the ear for the purpose of reproducing a sound to acoustically cancel out another sound and enable sonic (active noise control) treatment of tinnitus while sleeping facing the side pressing an ear against a sleeping surface. The Sound Control Ear Cup can also be used to protect hearing and/or cancel out ambient sound noise. The tinnitus treatment device is a pair of sound control ear cups optionally held together with a headset or head-strap. The hearing protection device is a pair of sound control ear cups optionally held together with a headset or head-strap.Type: GrantFiled: July 29, 2021Date of Patent: March 29, 2022Inventor: David Beavers
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Publication number: 20210228793Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period.Type: ApplicationFiled: January 4, 2021Publication date: July 29, 2021Applicant: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, JR., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. Mcgill, Simon C. Helmore
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Patent number: 10881778Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period.Type: GrantFiled: May 29, 2018Date of Patent: January 5, 2021Assignee: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore
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Publication number: 20190321535Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater.Type: ApplicationFiled: January 14, 2019Publication date: October 24, 2019Applicant: DEKA Products Limited PartnershipInventors: David A. Beavers, Michael G. Norris, John M. Kerwin, Andrew S. Coll, Paul G. Girouard, Robert J. Bryant, JR., Geoffrey P. Spencer, Joseph P. Rushlow, Jacob W. Scarpaci
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Publication number: 20190060629Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater.Type: ApplicationFiled: August 24, 2018Publication date: February 28, 2019Applicant: DEKA Products Limited PartnershipInventors: Michael G. Norris, Jacob W. Scarpaci, Robert J. Bryant, JR., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore, David B. Doherty, Edgar J. Bolton, Jinsun Yoo, Paul G. Girouard, Daniel S. Karol, Daniel B. Singer, Joseph P. Rushlow
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Patent number: 10201647Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater.Type: GrantFiled: June 5, 2015Date of Patent: February 12, 2019Assignee: DEKA Products Limited PartnershipInventors: Michael G. Norris, Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore, David B. Doherty, Edgar J. Bolton, Jinsun Yoo, Paul G. Girouard, Daniel S. Karol, Daniel B. Singer, Joseph P. Rushlow
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Publication number: 20180361048Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period.Type: ApplicationFiled: May 29, 2018Publication date: December 20, 2018Applicant: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, JR., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore
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Patent number: 10058694Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater.Type: GrantFiled: June 5, 2015Date of Patent: August 28, 2018Assignee: DEKA Products Limited PartnershipInventors: Michael G. Norris, Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore, David B. Doherty, Edgar J. Bolton, Jinsun Yoo, Paul G. Girouard, Daniel S. Karol, Daniel B. Singer, Joseph P. Rushlow
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Patent number: 9981079Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period.Type: GrantFiled: February 14, 2017Date of Patent: May 29, 2018Assignee: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore
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Patent number: 9861732Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. A fluid trap of a peritoneal dialysis cycler may have a valved connection to a vacuum source or a positive pressure source. The fluid trap can be connected to the vacuum source in order to sealingly engage a flexible membrane of a pumping cassette to a control surface of the cycler during a therapy. Any fluid entering a space between the membrane and control surface can be drawn away and collected in the fluid trap. The fluid trap alternatively can be connected to a positive pressure source in order to aid in separating the membrane from the control surface to facilitate removal of the pumping cassette from the cycler. The fluid trap may include a liquid detection sensor.Type: GrantFiled: November 2, 2012Date of Patent: January 9, 2018Assignee: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore
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Publication number: 20170157310Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period.Type: ApplicationFiled: February 14, 2017Publication date: June 8, 2017Applicant: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, JR., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore
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Publication number: 20160101227Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater.Type: ApplicationFiled: June 5, 2015Publication date: April 14, 2016Applicant: DEKA Products Limited PartnershipInventors: Michael G. Norris, Jacob W. Scarpaci, Robert J. Bryant, JR., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore, David B. Doherty, Edgar J. Bolton, Jinsun Yoo, Paul G. Girouard, Daniel S. Karol, Daniel B. Singer, Joseph P. Rushlow
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Publication number: 20160101278Abstract: Improvements in fluid volume measurement systems are disclosed for a pneumatically actuated diaphragm pump in general, and a peritoneal dialysis cycler using a pump cassette in particular. Pump fluid volume measurements are based on pressure measurements in a pump control chamber and a reference chamber in a two-chamber model, with different sections of the apparatus being modeled using a combination of adiabatic, isothermal and polytropic processes. Real time or instantaneous fluid flow measurements in a pump chamber of a diaphragm pump are also disclosed, in this case using a one-chamber ideal gas model and using a high speed processor to obtain and process pump control chamber pressures during fluid flow into or out of the pump chamber. Improved heater control circuitry is also disclosed, to provide added or redundant safety measures, or to reduce current leakage from a heater element during pulse width modulation control of the heater.Type: ApplicationFiled: June 5, 2015Publication date: April 14, 2016Applicant: DEKA Products Limited PartnerInventors: Michael G. Norris, Jacob W. Scarpaci, Robert J. Bryant, JR., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore, David B. Doherty, Edgar J. Bolton, Jinsun Yoo, Paul G. Girouard, Daniel S. Karol, Daniel B. Singer, Joseph P. Rushlow
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Patent number: 9078971Abstract: A medical treatment system, such as peritoneal dialysis system, may include control and other features to enhance patient comfort and ease of use. For example, a peritoneal dialysis system may include a control system that can adjust the volume of fluid infused into the peritoneal cavity to prevent the intraperitoneal fluid volume from exceeding a pre-determined amount. The control system can adjust by adding one or more therapy cycles, allowing for fill volumes during each cycle to be reduced. The control system may continue to allow the fluid to drain from the peritoneal cavity as completely as possible before starting the next therapy cycle. The control system may also adjust the dwell time of fluid within the peritoneal cavity during therapy cycles in order to complete a therapy within a scheduled time period.Type: GrantFiled: November 2, 2012Date of Patent: July 14, 2015Assignee: DEKA Products Limited PartnershipInventors: Jacob W. Scarpaci, Robert J. Bryant, Jr., Geoffrey P. Spencer, David J. Hibbard, James D. Dale, John M. Kerwin, Andrew S. Coll, David A. Beavers, David W. McGill, Simon C. Helmore