Patents by Inventor Harold Dabbs
Harold Dabbs 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: 9187079Abstract: A retarding system for an electric drive machine is provided. The retarding system includes an electrical retarding system and a hydraulic braking system. A single pedal controls both the electrical retarding system and the hydraulic braking system. The pedal includes a first range of travel that provides input to the electrical retarding system and a second range of travel that additionally controls the hydraulic braking system. The pedal further includes different levels of travel resistance in each of the two ranges of travel that correspond to providing inputs to the electrical retarding system and the hydraulic braking system.Type: GrantFiled: June 28, 2013Date of Patent: November 17, 2015Assignee: Caterpillar Inc.Inventors: Nischol Antao, Michael Staub, Bradley Bailey, Bryan Copeland, Harold Dabbs
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Publication number: 20150001914Abstract: A retarding system for an electric drive machine is provided. The retarding system includes an electrical retarding system and a hydraulic braking system. A single pedal controls both the electrical retarding system and the hydraulic braking system. The pedal includes a first range of travel that provides input to the electrical retarding system and a second range of travel that additionally controls the hydraulic braking system. The pedal further includes different levels of travel resistance in each of the two ranges of travel that correspond to providing inputs to the electrical retarding system and the hydraulic braking system.Type: ApplicationFiled: June 28, 2013Publication date: January 1, 2015Inventors: Nischol Antao, Michael Staub, Bradley Bailey, Bryan Copeland, Harold Dabbs
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Patent number: 8849535Abstract: In a machine having an electro-hydraulic brake valve, issues in providing a desired brake pressure may be determined by comparing an actual brake output pressure of the brake valve to an acceptable brake pressure range for an output brake command current provided to the brake valve to generate the desired brake pressure. Where the actual brake output pressure is outside the acceptable brake pressure range, the brake pressure difference and time-rate-of-change of the brake pressure may be used to determine a weighted brake pressure difference that is accumulated over a series of sample cycles and compared to an integration limit to determine whether the operator should be warned of the brake pressure difference. The integration limit may be based on a factor indicative of the responsiveness of the machine, such as the oil temperature.Type: GrantFiled: April 30, 2012Date of Patent: September 30, 2014Assignee: Caterpillar Inc.Inventor: Harold Dabbs
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Patent number: 8818632Abstract: In a machine having a differential steering control system, uncommanded motion may be determined by comparing an actual speed of a steering motor to a commanded turn direction signal from an operator. Where uncommanded motion is occurring, the steering motor speed and time-rate-of-change of the steering motor speed may be used to determine a weighted steering motor speed that is accumulated over a series of sample cycles and compared to an integration limit to determine whether the operator should be warned of the occurrence of uncommanded motion. The integration limit may be based on a factor indicative of the responsiveness of the machine, such as the oil temperature.Type: GrantFiled: March 30, 2012Date of Patent: August 26, 2014Assignee: Caterpillar Inc.Inventors: Harold Dabbs, Brittany J. Lee
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Publication number: 20130289842Abstract: In a machine having an electro-hydraulic brake valve, issues in providing a desired brake pressure may be determined by comparing an actual brake output pressure of the brake valve to an acceptable brake pressure range for an output brake command current provided to the brake valve to generate the desired brake pressure. Where the actual brake output pressure is outside the acceptable brake pressure range, the brake pressure difference and time-rate-of-change of the brake pressure may be used to determine a weighted brake pressure difference that is accumulated over a series of sample cycles and compared to an integration limit to determine whether the operator should be warned of the brake pressure difference. The integration limit may be based on a factor indicative of the responsiveness of the machine, such as the oil temperature.Type: ApplicationFiled: April 30, 2012Publication date: October 31, 2013Applicant: CATERPILLAR, INC.Inventor: Harold Dabbs
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Publication number: 20130261895Abstract: In a machine having a differential steering control system, uncommanded motion may be determined by comparing an actual speed of a steering motor to a commanded turn direction signal from an operator. Where uncommanded motion is occurring, the steering motor speed and time-rate-of-change of the steering motor speed may be used to determine a weighted steering motor speed that is accumulated over a series of sample cycles and compared to an integration limit to determine whether the operator should be warned of the occurrence of uncommanded motion. The integration limit may be based on a factor indicative of the responsiveness of the machine, such as the oil temperature.Type: ApplicationFiled: March 30, 2012Publication date: October 3, 2013Applicant: CATERPILLAR, INC.Inventors: Harold Dabbs, Brittany J. Lee
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Patent number: 6805516Abstract: A roadway paving system for chipsealing a roadway surface comprising a novel roadway paving vehicle and a novel supply truck is provided. The roadway paving vehicle comprises an asphalt binder material dispensing system and an aggregate material dispensing system. The asphalt binder material dispensing system includes an asphalt tank and a sprayer that sprays a first layer of the asphalt binder material over the roadway surface. The aggregate material dispensing system comprises an aggregate hopper and conveyor mechanism that discharges a second layer of aggregate material over the roadway surface. No wheels run over a freshly laid surface. Supply trucks are linked to the roadway paving vehicle to refill the roadway paving vehicle on a continuous basis without the need of stopping the vehicle.Type: GrantFiled: June 4, 2001Date of Patent: October 19, 2004Assignees: E.D. Etnyre & Co., KMC Enterprises, Inc.Inventors: James J. Barnat, Patrick O'Brien, Harold Dabbs, Jeremy Heller, Thomas R. Brown, Tyrone Hannebaum
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Patent number: 6776557Abstract: A roadway paving system for chipsealing a roadway surface comprising a novel roadway paving vehicle and a novel supply truck is provided. The roadway paving vehicle comprises an asphalt binder material dispensing system and an aggregate material dispensing system. The asphalt binder material dispensing system includes an asphalt tank and a sprayer that sprays a first layer of the asphalt binder material over the roadway surface. The aggregate material dispensing system comprises an aggregate hopper and conveyor mechanism that discharges a second layer of aggregate material over the roadway surface. No wheels run over a freshly laid surface. Supply trucks are linked to the roadway paving vehicle to refill the roadway paving vehicle on a continuous basis without the need of stopping the vehicle.Type: GrantFiled: September 4, 2002Date of Patent: August 17, 2004Assignee: E.D. Etnyre & Co.Inventors: James J. Barnat, Patrick O'Brien, Harold Dabbs, Jeremy Heller, Thomas R. Brown, Tyrone Hannebaum
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Publication number: 20030012601Abstract: A roadway paving system for chipsealing a roadway surface comprising a novel roadway paving vehicle and a novel supply truck is provided. The roadway paving vehicle comprises an asphalt binder material dispensing system and an aggregate material dispensing system. The asphalt binder material dispensing system includes an asphalt tank and a sprayer that sprays a first layer of the asphalt binder material over the roadway surface. The aggregate material dispensing system comprises an aggregate hopper and conveyor mechanism that discharges a second layer of aggregate material over the roadway surface. No wheels run over a freshly laid surface. Supply trucks are linked to the roadway paving vehicle to refill the roadway paving vehicle on a continuous basis without the need of stopping the vehicle.Type: ApplicationFiled: September 4, 2002Publication date: January 16, 2003Applicant: E.D. Etnyre & Co.Inventors: James J. Barnat, Patrick C. O'Brien, Harold Dabbs, Jeremy Heller, Thomas R. Brown, Tyrone Hannebaum
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Publication number: 20020182009Abstract: A roadway paving system for chipsealing a roadway surface comprising a novel roadway paving vehicle and a novel supply truck is provided. The roadway paving vehicle comprises an asphalt binder material dispensing system and an aggregate material dispensing system. The asphalt binder material dispensing system includes an asphalt tank and a sprayer that sprays a first layer of the asphalt binder material over the roadway surface. The aggregate material dispensing system comprises an aggregate hopper and conveyor mechanism that discharges a second layer of aggregate material over the roadway surface. No wheels run over a freshly laid surface. Supply trucks are linked to the roadway paving vehicle to refill the roadway paving vehicle on a continuous basis without the need of stopping the vehicle.Type: ApplicationFiled: June 4, 2001Publication date: December 5, 2002Applicant: E.D. Etnyre & Co.Inventors: James J. Barnat, Patrick O'Brien, Harold Dabbs, Jeremy Heller, Thomas R. Brown, Tyrone Hannebaum