Patents by Inventor Robert Leslie Isaacs
Robert Leslie Isaacs 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: 11885317Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston.Type: GrantFiled: June 30, 2022Date of Patent: January 30, 2024Assignee: DANFOSS A/SInventors: Anil Balasaheb Kharpas, Avinash Dadaso Patil, Sanjay Dhondappa Mali, Amit Ranjit Panchal, Robert Leslie Isaacs
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Publication number: 20230041899Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston.Type: ApplicationFiled: June 30, 2022Publication date: February 9, 2023Inventors: Anil Balasaheb KHARPAS, Avinash Dadaso PATIL, Sanjay Dhondappa MALI, Amit Ranjit PANCHAL, Robert Leslie ISAACS
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Patent number: 11536265Abstract: The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.Type: GrantFiled: November 4, 2020Date of Patent: December 27, 2022Assignee: DANFOSS POWER SOLUTIONS II TECHNOLOGY A/SInventors: Don Rulon Draper, Robert Leslie Isaacs
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Patent number: 11378068Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston.Type: GrantFiled: July 13, 2020Date of Patent: July 5, 2022Assignee: Danfoss Power Solutions II Technology A/SInventors: Anil Balasaheb Kharpas, Avinash Dadaso Patil, Sanjay Dhondappa Mali, Amit Ranjit Panchal, Robert Leslie Isaacs
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Patent number: 11104230Abstract: A method for power management of a transport refrigeration system electrically connected to a utility power source. The method including determining an operating mode for the transport refrigeration system based on one or more of an amount of utility power available from the utility power source to the transport refrigeration system, a current cost of the utility power, and a noise or emission regulation for operating a prime mover. A transport refrigeration system unit that includes a transport refrigeration unit and a controller configured to receive power from a utility power source or a primary energy source. The controller also configured to determine an operating mode for the transport refrigeration system based on one or more of an amount of utility power available from the utility power source to the transport refrigeration system, a current cost of the utility power, and a noise or emission regulation for operating the prime mover.Type: GrantFiled: January 18, 2019Date of Patent: August 31, 2021Assignee: Thermo King CorporationInventors: Philip Lewis Lavrich, Robert Leslie Isaacs
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Publication number: 20210115910Abstract: The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.Type: ApplicationFiled: November 4, 2020Publication date: April 22, 2021Inventors: Don Rulon DRAPER, Robert Leslie ISAACS
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Patent number: 10954927Abstract: A hydraulic pump system includes a pump control system operable to reduce electric current required at the start of the pump and reduce starting torque for the pump. The pump control system can include a gap between a spring seat and a valve spool such that the valve spool need not overcome a biasing force from a swash plate when the swash plate changes from its maximum displacement position to its neutral position.Type: GrantFiled: November 14, 2016Date of Patent: March 23, 2021Assignee: EATON INTELLIGENT POWER LIMITEDInventors: Anil Balasaheb Kharpas, Robert Leslie Isaacs, Avinash Dadaso Patil, Amit Ranjit Panchal, Yogiraj Firake, Anil Ghegade
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Publication number: 20210025373Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston.Type: ApplicationFiled: July 13, 2020Publication date: January 28, 2021Inventors: Anil Balasaheb KHARPAS, Avinash Dadaso PATIL, Sanjay Dhondappa MALI, Amit Ranjit PANCHAL, Robert Leslie ISAACS
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Patent number: 10859069Abstract: The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.Type: GrantFiled: February 8, 2016Date of Patent: December 8, 2020Assignee: EATON INTELLIGENT POWER LIMITEDInventors: Don Rulon Draper, Robert Leslie Isaacs
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Publication number: 20200256326Abstract: A hydraulic pump system includes a pump control system operable to reduce electric current required at the start of the pump and reduce starting torque for the pump. The pump control system can include a gap between a spring seat and a valve spool such that the valve spool need not overcome a biasing force from a swash plate when the swash plate changes from its maximum displacement position to its neutral position.Type: ApplicationFiled: November 14, 2016Publication date: August 13, 2020Inventors: Anil Balasaheb KHARPAS, Robert Leslie ISAACS, Avinash Dadaso PATIL, Amit Ranjit PANCHAL, Yogiraj FIRAKE, Anil GHEGADE
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Publication number: 20200231041Abstract: A method for power management of a transport refrigeration system electrically connected to a utility power source. The method including determining an operating mode for the transport refrigeration system based on one or more of an amount of utility power available from the utility power source to the transport refrigeration system, a current cost of the utility power, and a noise or emission regulation for operating a prime mover. A transport refrigeration system unit that includes a transport refrigeration unit and a controller configured to receive power from a utility power source or a primary energy source. The controller also configured to determine an operating mode for the transport refrigeration system based on one or more of an amount of utility power available from the utility power source to the transport refrigeration system, a current cost of the utility power, and a noise or emission regulation for operating the prime mover.Type: ApplicationFiled: January 18, 2019Publication date: July 23, 2020Inventors: Philip Lewis Lavrich, Robert Leslie Isaacs
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Patent number: 10711771Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston.Type: GrantFiled: August 9, 2016Date of Patent: July 14, 2020Assignee: Eaton Intelligent Power LimitedInventors: Anil Balasaheb Kharpas, Avinash Dadaso Patil, Sanjay Dhondappa Mali, Amit Ranjit Panchal, Robert Leslie Isaacs
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Publication number: 20180230978Abstract: A pump control assembly for controlling a variable displacement hydraulic pump includes a spool mounted within a valve block. The spool is configured to move between a first and a second position within the valve block so as to selectively control the displacement of the attached pump. The pump control assembly further includes first and second chambers that each apply a force to opposite ends of the spool. The first chamber is positioned at a first end of the spool in fluid communication with a pump output port. The second chamber is positioned at a second end of the spool and in fluid communication with a hydraulic tank port and a proportional pressure reducing valve. The second chamber also includes a piston and first and second springs positioned on either side of the piston.Type: ApplicationFiled: August 9, 2016Publication date: August 16, 2018Inventors: Anil Balasaheb KHARPAS, Avinash Dadaso PATIL, Sanjay Dhondappa MALI, Amit Ranjit PANCHAL, Robert Leslie ISAACS
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Publication number: 20180045185Abstract: The present invention relates to a hydraulic pump system including a variable displacement pump that generates an outlet pressure. The hydraulic pump system also includes a control system that decreases a displacement volume of the variable displacement pump in response to an increase in the outlet pressure and increases a displacement volume of the variable displacement pump in response to a decrease in the outlet pressure.Type: ApplicationFiled: February 8, 2016Publication date: February 15, 2018Applicant: EATON CORPORATIONInventors: Don Rulon DRAPER, Robert Leslie ISAACS
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Publication number: 20100228525Abstract: A data logging system includes a sensor for monitoring a parameter and a data logger. The data logger includes a first logging mode and a second logging mode. The first logging mode has a low-capacity logging mode adapted to collect data from the sensor at time intervals, identify a start of a data cycle when the parameter reaches a first limit, identify a stop of the data cycle when the parameter reaches a second limit, process the data collected between the start and stop of the data cycle, log the data processed, the data processed having less bytes than the data collected between the start and stop of the data cycle. The second logging mode is adapted to collect data from the sensor at time intervals and to log a portion of the data collected after receiving an event code.Type: ApplicationFiled: March 5, 2010Publication date: September 9, 2010Inventors: Christopher Thomas Arneson, Robert Leslie Isaacs, Vincent Joseph Duray