Patents by Inventor John Hobart Zentmyer

John Hobart Zentmyer 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: 6681654
    Abstract: A locked differential for motor vehicles including, for each of oppositely positioned axles for wheels of a vehicle, an axle coupler, and a driver, each being co-axially aligned with a respective axle, a plurality of teeth on each respective axle, a plurality of teeth on respective mutually facing faces of each respective coupler and driver for effecting an interlocking drive coupling therebetween, a transverse driving shaft extending between the respective drivers and arranged to effect rotation drive against the respective drivers, a resilient device extending between the drivers to urge these apart and toward an interlocking engagement with their respective couplers, and a device providing a camming interrelationship between the respective drivers such that, with relative rotation between the two drivers, the effect, at least as a result from one respective relative direction, will result in the two drivers being urged toward each other against the opposite pressure of the resilient device so as to release
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: January 27, 2004
    Assignee: 4WD Equipment SA PTY Ltd.
    Inventor: John Hobart Zentmyer
  • Publication number: 20020151402
    Abstract: A locked differential for motor vehicles including, for each of oppositely positioned axles for wheels of a vehicle, an axle coupler, and a driver, each being co-axially aligned with a respective axle, a plurality of teeth on each respective axle, a plurality of teeth on respective mutually facing faces of each respective coupler and driver for effecting an interlocking drive coupling therebetween, a transverse driving shaft extending between the respective drivers and arranged to effect rotation drive against the respective drivers, a resilient device extending between the drivers to urge these apart and toward an interlocking engagement with their respective couplers, and a device providing a camming interrelationship between the respective drivers such that, with relative rotation between the two drivers, the effect, at least as a result from one respective relative direction, will result in the two drivers being urged toward each other against the opposite pressure of the resilient device so as to release
    Type: Application
    Filed: January 25, 2002
    Publication date: October 17, 2002
    Inventor: John Hobart Zentmyer
  • Patent number: 4071808
    Abstract: A relatively infinitely incremental mode of obtaining any desired brightness of flash from an electrically operable flash-tube is attained by employing plural capacitors, each having a charging source of selectable voltage level and a unilaterally conductive element between the capacitor and the flash-tube. The unilaterally conductive element is poled to pass the charge on the associated capacitor during the discharge cycle regardless of the voltage of the charge on other of the plural capacitors involved.
    Type: Grant
    Filed: July 15, 1976
    Date of Patent: January 31, 1978
    Inventor: John Hobart Zentmyer