Patents by Inventor Robert David Clark

Robert David Clark 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).

  • Vehicle transmission with clutch pack overrun
    Patent number: 9114800
    Abstract: 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: Grant
    Filed: October 30, 2013
    Date of Patent: August 25, 2015
    Assignee: NACCO Materials Handling Group, Inc.
    Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
  • Vehicle Transmission With Clutch Pack Overrun
    Publication number: 20140052354
    Abstract: 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: Application
    Filed: October 30, 2013
    Publication date: February 20, 2014
    Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
  • Vehicle transmission with clutch pack overrun
    Patent number: 8596156
    Abstract: 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: Grant
    Filed: February 25, 2010
    Date of Patent: December 3, 2013
    Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess
  • VEHICLE TRANSMISSION WITH CLUTCH PACK OVERRUN
    Publication number: 20110303505
    Abstract: 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: Application
    Filed: February 25, 2010
    Publication date: December 15, 2011
    Applicant: NACCO Materials Handling Group, Inc.
    Inventors: Robert David Clark, Chenyao Chen, Robert Lee Chess