Patents by Inventor John Zentmyer

John 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: 6269712
    Abstract: A full-locking differential drive mechanism, comprised of an input drive which is composed of a pair of opposed spaced drive races, each having an inner diameter, a coupling block disposed between the races for coupling them to drive together, output driven means comprising a pair of co-axially disposed coupler members, each having an outer diameter disposed within the drive races inner diameters, which produces a bi-directional roller clutch disposed between the inner diameters and the outer diameters and operative to couple the drive races to the coupler members enabling driving engagement therebetween.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: August 7, 2001
    Inventor: John Zentmyer
  • Patent number: 5603246
    Abstract: An automotive differential assembly for a vehicle having a driving case enclosing a pair of driving members operably coupled with a pair of driven members. The driven members are secured to output shafts and the driving members are forcibly driven by a driving shaft having its opposite ends in engagement with the driving case. The driving shaft passes through eccentric or angled apertures formed by cooperating arcuate surfaces provided in opposing surfaces of the driving members. The driving members and the driven members are urged together respectively by at least four dampening springs providing both axial and radial force which dampens or eliminates sudden impact encountered when the shaft moves back and forth within the apertures. The driving members may be loosely aligned and interrelated by pins and enlarged holes, by pins and laterally opened holes or by a key and keyway or channel construction.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: February 18, 1997
    Inventor: John Zentmyer
  • Patent number: 5413015
    Abstract: A differential assembly having a driving case enclosing a pair of driving members operably coupled with a pair of driven members. The driven members are secured to output shafts and the driving members are forcibly driven by a driving shaft having its opposite ends in engagement with the driving case. The mid-section of the driving shaft passes through an eccentric or angled aperture formed by cooperating arcuate surfaces provided in opposing surfaces of the driving members. The driving members and the driven members are urged together respectively by double oppositely wound concentric springs bearing against a pin carried in an elongated hole coextensively provided in opposing surfaces of adjacent driving members of both pairs. Inspection and access openings are provided in passageways and in the oblong cross-section of part of the passageways.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: May 9, 1995
    Inventor: John Zentmyer