Patents by Inventor Robert Lee Chess
Robert Lee Chess 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: 9114800Abstract: A drive system (14, 34) comprising an input shaft (112); a first clutch (114) configured to selectively couple a first gear (116) to the input shaft (112); an output shaft (126); a second gear (138) engaging with the first gear (116); and a drive axle clutch system (142) having different travel direction clutches.Type: GrantFiled: October 30, 2013Date of Patent: August 25, 2015Assignee: NACCO Materials Handling Group, Inc.Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
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Publication number: 20140135170Abstract: A drive axle assembly includes a drive axle configured to rotate with a driving torque, a first clutch pack assembly located at an end of the drive axle, and a second clutch pack assembly located at an opposite end of the drive axle. A first drive wheel assembly is operatively connected to the first clutch pack assembly, wherein the first clutch pack assembly is configured to convert the driving torque of the drive axle to a first driving torque of the first drive wheel. A second drive wheel assembly is operatively connected to the second clutch pack assembly, wherein the second clutch pack assembly is configured to convert the driving torque of the drive axle to a second driving torque of the second drive wheel.Type: ApplicationFiled: January 21, 2014Publication date: May 15, 2014Applicant: NACCO Materials Handling Group, Inc.Inventors: Robert Lee CHESS, Chenyao CHEN, John ROWLEY
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Publication number: 20140052354Abstract: A drive system (14, 34) comprising an input shaft (112); a first clutch (114) configured to selectively couple a first gear (116) to the input shaft (112); an output shaft (126); a second gear (138) engaging with the first gear (116); and a drive axle clutch system (142) having different travel direction clutches.Type: ApplicationFiled: October 30, 2013Publication date: February 20, 2014Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
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Patent number: 8651205Abstract: A drive axle assembly includes a drive axle configured to rotate with a driving torque, a first clutch pack assembly located at an end of the drive axle, and a second clutch pack assembly located at an opposite end of the drive axle. A first drive wheel assembly is operatively connected to the first clutch pack assembly, wherein the first clutch pack assembly is configured to convert the driving torque of the drive axle to a first driving torque of the first drive wheel. A second drive wheel assembly is operatively connected to the second clutch pack assembly, wherein the second clutch pack assembly is configured to convert the driving torque of the drive axle to a second driving torque of the second drive wheel.Type: GrantFiled: February 25, 2010Date of Patent: February 18, 2014Inventors: Robert Lee Chess, Chenyao Chen, John Rowley
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Patent number: 8596156Abstract: A transmission system (14) comprising an input shaft (112); a first clutch (114) configured to selectively couple a first gear (116) to the input shaft (112); an output shaft (126); a second gear (138) engaging with the first gear (116), —and a second clutch (136) configured to couple the second gear (138) to the output shaft (126) when the first gear (116) rotates the second gear (138) faster than the output shaft (126).Type: GrantFiled: February 25, 2010Date of Patent: December 3, 2013Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
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Publication number: 20110303505Abstract: A transmission system (14) comprising an input shaft (112); a first clutch (114) configured to selectively couple a first gear (116) to the input shaft (112); an output shaft (126); a second gear (138) engaging with the first gear (116), —and a second clutch (136) configured to couple the second gear (138) to the output shaft (126) when the first gear (116) rotates the second gear (138) faster than the output shaft (126).Type: ApplicationFiled: February 25, 2010Publication date: December 15, 2011Applicant: NACCO Materials Handling Group, Inc.Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
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Publication number: 20110297460Abstract: A drive axle assembly includes a drive axle configured to rotate with a driving torque, a first clutch pack assembly located at an end of the drive axle, and a second clutch pack assembly located at an opposite end of the drive axle. A first drive wheel assembly is operatively connected to the first clutch pack assembly, wherein the first clutch pack assembly is configured to convert the driving torque of the drive axle to a first driving torque of the first drive wheel. A second drive wheel assembly is operatively connected to the second clutch pack assembly, wherein the second clutch pack assembly is configured to convert the driving torque of the drive axle to a second driving torque of the second drive wheel.Type: ApplicationFiled: February 25, 2010Publication date: December 8, 2011Applicant: NACCO MATERIALS HANDLING GROUP, INC.Inventors: Robert Lee Chess, Chenyao Chen, John Rowley
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Patent number: 7974760Abstract: A method for controlling a power-shift transmission comprising controlling a vehicle travel speed by simultaneously slipping two or more clutch packs associated with opposing directions of vehicle travel and adjusting an engine speed, according to a programmed response associated with a change in one or more of the engine speed, a torque converter slip, a selected direction of vehicle travel, and an accelerator position.Type: GrantFiled: September 6, 2006Date of Patent: July 5, 2011Assignee: NMHG Oregon, Inc.Inventors: John Rowley, Hong-Chin Lin, Chenyao Chen, Robert Lee Chess
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Patent number: 6950737Abstract: A transmission system includes a Central Processing Unit (CPU) that controls truck braking energy by sharing energy dissipation between clutch packs. The CPU reduces engine speed and then slips the two clutch packs at the same time to maintain a reduced turbine speed for a torque converter. In another aspect of the transmission system, energy loss is reduced during high draw bar pull conditions. The engine speed is modulated to trim energy peaks at low pushing or pulling speeds. An additional transmission gear reduction restores the lost pushing or pulling forces while generating less heat in the torque converter.Type: GrantFiled: October 20, 2003Date of Patent: September 27, 2005Assignee: NACCO Materials Handling Group, Inc.Inventor: Robert Lee Chess
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Publication number: 20040088099Abstract: A transmission system includes a Central Processing Unit (CPU) that controls truck braking energy by sharing energy dissipation between clutch packs. The CPU reduces engine speed and then slips the two clutch packs at the same time to maintain a reduced turbine speed for a torque converter. In another aspect of the transmission system, energy loss is reduced during high draw bar pull conditions. The engine speed is modulated to trim energy peaks at low pushing or pulling speeds. An additional transmission gear reduction restores the lost pushing or pulling forces while generating less heat in the torque converter.Type: ApplicationFiled: October 20, 2003Publication date: May 6, 2004Applicant: NACCO Materials Handling Group, Inc.Inventor: Robert Lee Chess
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Patent number: 6684148Abstract: A transmission system includes a Central Processing Unit (CPU) that controls truck braking energy by sharing energy dissipation between clutch packs. The CPU reduces engine speed and then slips the two clutch packs at the same time to maintain a reduced turbine speed for a torque converter. In another aspect of the transmission system, energy loss is reduced during high draw bar pull conditions. The engine speed is modulated to trim energy peaks at low pushing or pulling speeds. An additional transmission gear reduction restores the lost pushing or pulling forces while generating less heat in the torque converter.Type: GrantFiled: July 30, 2002Date of Patent: January 27, 2004Assignee: NACCO Materials Handling Group, Inc.Inventor: Robert Lee Chess
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Publication number: 20030233186Abstract: A transmission system includes a Central Processing Unit (CPU) that controls truck braking energy by sharing energy dissipation between clutch packs. The CPU reduces engine speed and then slips the two clutch packs at the same time to maintain a reduced turbine speed for a torque converter. In another aspect of the transmission system, energy loss is reduced during high draw bar pull conditions. The engine speed is modulated to trim energy peaks at low pushing or pulling speeds. An additional transmission gear reduction restores the lost pushing or pulling forces while generating less heat in the torque converter.Type: ApplicationFiled: July 30, 2002Publication date: December 18, 2003Applicant: NACCO Materials Handling Group, Inc.Inventor: Robert Lee Chess