Patents by Inventor Christopher J. Demick
Christopher J. Demick 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).
-
Patent number: 10683712Abstract: A method for monitoring a cable of an implement system. The implement system includes a drilling device, a tensioning device and the cable, the cable coupled to the drilling device and the tensioning device in a taut configuration to define a first length. The method includes determining, by a controller, an increment in the first length of the cable. The method further includes comparing, by the controller, the increment in the first length with a threshold value; and generating, by the controller, a warning signal if magnitude of the increment is greater than the threshold value.Type: GrantFiled: January 17, 2018Date of Patent: June 16, 2020Assignee: Caterpillar Inc.Inventors: Christopher J. Demick, Rex Glover
-
Patent number: 10392878Abstract: A control system for actuating a drill pipe rack is provided. The drill pipe rack moves between a first position and a second position. The control system includes a first actuator to actuate a top end of the drill pipe rack and a second actuator to actuate a bottom end of the drill pipe rack. The control system includes a pump to supply pressurized fluid to the first actuator and the second actuator. The control system further includes at least one volumetric flow divider in fluid communication with the pump. The volumetric flow divider is configured to supply equal volumetric quantity of the pressurized fluid to the first actuator and the second actuator, and subsequently move the drill pipe rack between the first position and the second position.Type: GrantFiled: July 10, 2017Date of Patent: August 27, 2019Assignee: Caterpillar Global Mining Equipment LLCInventors: Charles Taylor Hudson, Christopher J Demick, Yuvaraj Shanmugam
-
Publication number: 20190218902Abstract: A method for monitoring a cable of an implement system. The implement system includes a drilling device, a tensioning device and the cable, the cable coupled to the drilling device and the tensioning device in a taut configuration to define a first length. The method includes determining, by a controller, an increment in the first length of the cable. The method further includes comparing, by the controller, the increment in the first length with a threshold value; and generating, by the controller, a warning signal if magnitude of the increment is greater than the threshold value.Type: ApplicationFiled: January 17, 2018Publication date: July 18, 2019Applicant: Caterpillar Inc.Inventors: Christopher J. Demick, Rex Glover
-
Patent number: 10323458Abstract: A hydraulic circuit may be used for controlling a plurality of hydraulic implements. The hydraulic circuit may include a first directional valve, a second directional valve, and a relief valve. A variable displacement pump may be fluidly coupled to the first directional valve, the second directional valve, and the relief valve. The hydraulic circuit may be communicably and operably coupled to a controller, and the controller may be programmed to selectably control the hydraulic circuit between a first operational mode and a second operational mode. Additionally, the controller may be programmed to actuate the first directional valve between an open position and a closed position and to actuate the second directional valve between a first open position, a second open position, a first closed position and a second closed position.Type: GrantFiled: October 21, 2016Date of Patent: June 18, 2019Assignee: Caterpillar Inc.Inventors: Michael P. Chiaramonte, Christopher J. Demick
-
Publication number: 20190010769Abstract: A control system for actuating a drill pipe rack is provided. The drill pipe rack moves between a first position and a second position. The control system includes a first actuator to actuate a top end of the drill pipe rack and a second actuator to actuate a bottom end of the drill pipe rack. The control system includes a pump to supply pressurized fluid to the first actuator and the second actuator. The control system further includes at least one volumetric flow divider in fluid communication with the pump. The volumetric flow divider is configured to supply equal volumetric quantity of the pressurized fluid to the first actuator and the second actuator, and subsequently move the drill pipe rack between the first position and the second position.Type: ApplicationFiled: July 10, 2017Publication date: January 10, 2019Applicant: Caterpillar Global Mining Equipment LLCInventors: Charles Taylor Hudson, Christopher J. Demick, Yuvaraj Shanmugam
-
Publication number: 20180112467Abstract: A hydraulic circuit may be used for controlling a plurality of hydraulic implements. The hydraulic circuit may include a first directional valve, a second directional valve, and a relief valve. A variable displacement pump may be fluidly coupled to the first directional valve, the second directional valve, and the relief valve. The hydraulic circuit may be communicably and operably coupled to a controller, and the controller may be programmed to selectably control the hydraulic circuit between a first operational mode and a second operational mode. Additionally, the controller may be programmed to actuate the first directional valve between an open position and a closed position and to actuate the second directional valve between a first open position, a second open position, a first closed position and a second closed position.Type: ApplicationFiled: October 21, 2016Publication date: April 26, 2018Applicant: Caterpillar Inc.Inventors: Michael P. Chiaramonte, Christopher J. Demick
-
Patent number: 9096230Abstract: A drive system for a machine is disclosed. The drive system may have an engine, a pump driven by the engine to pressurize fluid, a motor connected to the pump via an inlet passage and an outlet passage, and a traction device driven by the motor. The drive system may also have an operator input device movable from a neutral position through a range to a maximum displaced position to affect a speed of the engine, and a controller in communication with the input device and at least one of the pump and motor. The controller may be configured to gradually adjust a displacement of the at least one of the pump and motor to slow the traction device over a period of time after the operator input device is returned to the neutral position.Type: GrantFiled: May 14, 2012Date of Patent: August 4, 2015Assignee: Caterpillar Paving Products Inc.Inventors: Michael W. Ries, Paul A. Dvorak, Mark L. Norton, Jon M. Scharf, Christopher J. Demick, Christopher M. Elliott
-
Patent number: 8833069Abstract: A closed hydrostatic circuit with variable charge and variable flushing systems is disclosed. A variable displacement charge pump is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An electronically controlled pressure regulating valve is in communication with an output of the charge pump and is linked to a controller. When the hydrostatic control system detects a high hydraulic temperature condition, the electronically controlled pressure regulating valve, that is in communication with an output of the charge pump and that is linked to a controller, increases the charge pump flow. A bidirectional variable displacement hydrostatic motor is connected in parallel to two input/output lines. A flush valve is in communication with the hydrostatic motor and both input/output lines. The flush valve and hydrostatic motor are both in communication with the flush orifice and a flush relief valve.Type: GrantFiled: June 16, 2011Date of Patent: September 16, 2014Assignee: Caterpillar Inc.Inventors: Christopher J. Demick, Paul A. Dvorak, William Christopher Swick, Vincent Guyard, Christopher Mark Elliott, Christopher Pruess
-
Patent number: 8790209Abstract: A final drive for a vehicle is disclosed. The final drive includes a motor assembly, a planetary gear train and a drive sprocket. The motor assembly includes a hydraulic motor, an output shaft, a housing, a thrust bearing, a brake and first, second and third chambers. The housing includes a supply port, a first passageway, a second passageway and a drain port.Type: GrantFiled: November 20, 2012Date of Patent: July 29, 2014Assignee: Caterpillar Inc.Inventors: Christopher J. Demick, Nathan S. Enderle, Paul A. Dvorak
-
Publication number: 20140141917Abstract: A final drive for a vehicle is disclosed. The final drive includes a motor assembly, a planetary gear train and a drive sprocket. The motor assembly includes a hydraulic motor, an output shaft, a housing, a thrust bearing, a brake and first, second and third chambers. The housing includes a supply port, a first passageway, a second passageway and a drain port.Type: ApplicationFiled: November 20, 2012Publication date: May 22, 2014Applicant: Caterpillar Inc.Inventors: Christopher J. Demick, Nathan S. Enderle, Paul A. Dvorak
-
Publication number: 20130104532Abstract: A drive system for a machine is disclosed. The drive system may have an engine, a pump driven by the engine to pressurize fluid, a motor connected to the pump via an inlet passage and an outlet passage, and a traction device driven by the motor. The drive system may also have an operator input device movable from a neutral position through a range to a maximum displaced position to affect a speed of the engine, and a controller in communication with the input device and at least one of the pump and motor. The controller may be configured to gradually adjust a displacement of the at least one of the pump and motor to slow the traction device over a period of time after the operator input device is returned to the neutral position.Type: ApplicationFiled: May 14, 2012Publication date: May 2, 2013Inventors: Michael W. RIES, Paul A. Dvorak, Mark L. Norton, Jon M. Scharf, Christopher J. Demick, Christopher M. Elliott
-
Publication number: 20120317964Abstract: A closed hydrostatic circuit with variable charge and variable flushing systems is disclosed. A variable displacement charge pump is configured to supply charge fluid and pilot control fluid to the hydrostatic circuit. An electronically controlled pressure regulating valve is in communication with an output of the charge pump and is linked to a controller. When the hydrostatic control system detects a high hydraulic temperature condition, the electronically controlled pressure regulating valve, that is in communication with an output of the charge pump and that is linked to a controller, increases the charge pump flow. A bidirectional variable displacement hydrostatic motor is connected in parallel to two input/output lines. A flush valve is in communication with the hydrostatic motor and both input/output lines. The flush valve and hydrostatic motor are both in communication with the flush orifice and a flush relief valve.Type: ApplicationFiled: June 16, 2011Publication date: December 20, 2012Applicant: CATERPILLAR, INC.Inventors: Christopher J. Demick, Paul A. Dvorak, William Christopher Swick, Vincent Guyard, Christopher Mark Elliott, Christopher Pruess