Patents by Inventor Joshua D. Callaway
Joshua D. Callaway 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: 20230383501Abstract: A machine may include a body, a boom link, a swing casting, and a boom. The boom and the swing casting may be configured to rotate horizontally about an axis through the boom link. The machine may further include a mounting bracket fixedly connected to the swing casting, a position sensor fixedly connected to the boom link, a first link fixedly connected at a first end to the position sensor and configured to rotate about an axis through a rotary element, and a second link fixedly connected at a first end to the mounting bracket and at a second end to a second end of the first link. The first link and the second link may be configured to rotate horizontally with horizontal rotation of the boom and the swing casting and to transfer the horizontal rotation of the boom and the swing casting to the rotary element.Type: ApplicationFiled: May 25, 2022Publication date: November 30, 2023Applicant: Caterpillar Inc.Inventors: Vincent Adam ARMSTRONG, Joshua D. CALLAWAY, Christopher Erik BRIGHT, Benjamin J. TERRY, Michael C. LAYKO
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Publication number: 20230374758Abstract: A method may include receiving, from a position sensor associated with a machine, data indicative of a horizontal rotation angle of a boom of the machine. The position sensor may be fixedly mounted to a boom link of the machine and may be fixedly connected through one or more links to the boom. The method may further include sending, to a boom actuator, one or more commands to modify a horizontal position of the boom to a target horizontal position or to a default horizontal position. The target horizontal position may include a position of the boom prior to drift in the horizontal position during operation of linkage elements of the machine and the default horizontal position may include a position of the boom to which the boom is to return after use.Type: ApplicationFiled: May 18, 2022Publication date: November 23, 2023Applicant: Caterpillar Inc.Inventors: Joshua D. CALLAWAY, Justin P. PAHL
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Patent number: 10233951Abstract: A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.Type: GrantFiled: October 5, 2016Date of Patent: March 19, 2019Assignee: Caterpillar Inc.Inventors: David J. Lomax, Joshua D. Callaway
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Publication number: 20180094650Abstract: A system and method for detecting uncommanded positioning of at least one valve spool in a plurality of valve spools and for stopping fluid flow to a plurality of hydraulic actuators fluidly connected to the plurality of valve spools is disclosed. The method may comprise receiving a signal fluid pressure detected in a signal passageway, identifying whether at least one activation command is currently enabled, and stopping the flow of fluid to the plurality of hydraulic actuators if no activation command is enabled for any of the plurality of valve spools, and the signal fluid pressure when detected (1) upstream of the plurality of valve spools is greater than a first threshold or (2) downstream of the plurality of valve spools is less than a second threshold.Type: ApplicationFiled: October 5, 2016Publication date: April 5, 2018Applicant: Caterpillar Inc.Inventors: David J. Lomax, Joshua D. Callaway
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Patent number: 9533661Abstract: Systems and methods for simulating electro-hydraulic (EH) braking of a work machine using a combination of hydraulic braking and engine braking may include determining a commanded brake pressure requested by an operator, determining an available engine braking force, and comparing the available engine braking force to a maximum available bleed pressure that is available to reduce a hydraulic braking force. An engine braking output and a pressure reducing valve output pressure may be determined based on the available engine braking force and the maximum available bleed pressure. A pressure reducing valve may be actuated so that the hydraulic braking force is equal to the commanded brake pressure minus the pressure reducing valve output pressure, and a transmission may be actuated so that the engine applies an engine braking force equivalent to the engine braking output to brake the work machine.Type: GrantFiled: June 24, 2015Date of Patent: January 3, 2017Assignee: Caterpillar Inc.Inventors: Todd R. Farmer, Steven J. Juricak, Jason M. Buckmier, Joshua D. Callaway, Korby A. Koch, Brian F. Taggart
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Publication number: 20160375880Abstract: Systems and methods for simulating electro-hydraulic (EH) braking of a work machine using a combination of hydraulic braking and engine braking may include determining a commanded brake pressure requested by an operator, determining an available engine braking force, and comparing the available engine braking force to a maximum available bleed pressure that is available to reduce a hydraulic braking force. An engine braking output and a pressure reducing valve output pressure may be determined based on the available engine braking force and the maximum available bleed pressure. A pressure reducing valve may be actuated so that the hydraulic braking force is equal to the commanded brake pressure minus the pressure reducing valve output pressure, and a transmission may be actuated so that the engine applies an engine braking force equivalent to the engine braking output to brake the work machine.Type: ApplicationFiled: June 24, 2015Publication date: December 29, 2016Applicant: Caterpillar Inc.Inventors: Todd R. Farmer, Steven J. Juricak, Jason M. Buckmier, Joshua D. Callaway, Korby A. Koch, Brian F. Taggart
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Patent number: 8762010Abstract: This disclosure relates to a control system for a machine implement. The control system includes a measurement sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to provide an implement measurement signal and an operator command signal, and to determine an adjusted implement command based signal based on the implement measurement signal and the operator command signal.Type: GrantFiled: March 15, 2013Date of Patent: June 24, 2014Assignee: Caterpillar Inc.Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway
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Patent number: 8700273Abstract: This disclosure relates to a control system for a machine. The control system includes a sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to receive the implement measurement signal, determine whether a main threshold condition is met, and to determine an adjusted implement command based at least in part on the implement measurement signal.Type: GrantFiled: February 21, 2013Date of Patent: April 15, 2014Assignee: Caterpillar Inc.Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway
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Patent number: 8406963Abstract: This disclosure relates to a control system for a machine implement. The control system includes a measurement sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to provide an implement measurement signal and an operator command signal, and to determine an adjusted implement command based signal based on the implement measurement signal and the operator command signal.Type: GrantFiled: August 18, 2009Date of Patent: March 26, 2013Assignee: Caterpillar Inc.Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway
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Publication number: 20110046857Abstract: This disclosure relates to a control system for a machine implement. The control system includes a measurement sensor configured to provide an implement measurement signal indicative of a velocity of a machine implement, and a controller. The controller is configured to provide an implement measurement signal and an operator command signal, and to determine an adjusted implement command based signal based on the implement measurement signal and the operator command signal.Type: ApplicationFiled: August 18, 2009Publication date: February 24, 2011Applicant: Caterpillar Inc.Inventors: Todd R. Farmer, Charles W. Grant, Gregory A. Epplin, Michael J. Chadwick, Joshua D. Callaway