Patents by Inventor Richard N. Ballard

Richard N. Ballard 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).

  • Roller cam assembly
    Patent number: 7086304
    Abstract: A transmission comprises a pair of drive shafts, one an input shaft and the other an output shaft, wherein one of said shafts is attached to a toothed cam having a trochoidal profile and the other drive shaft is attached to a roller ring having a plurality of cylindrical roller shafts aligned to mesh with said toothed cam and thereby permitting the transfer of torque from one shaft to the other.
    Type: Grant
    Filed: July 13, 2004
    Date of Patent: August 8, 2006
    Inventor: Richard N. Ballard
  • Roller cam assembly
    Patent number: 6902507
    Abstract: A two-stage epicyclic roller cam transmission comprising in each stage: a roller ring having a plurality of fixed-position rollers; and a cam gear having pitch-circle-generated, trochoid-shaped teeth and independent pitch, wherein the rollers are spaced to mesh with the cam gear and efficiently transfer energy under heavy loads.
    Type: Grant
    Filed: April 11, 2002
    Date of Patent: June 7, 2005
    Inventor: Richard N. Ballard
  • Roller cam assembly
    Publication number: 20040244522
    Abstract: A transmission comprises a pair of drive shafts, one an input shaft and the other an output shaft, wherein one of said shafts is attached to a toothed cam having a trochoidal profile and the other drive shaft is attached to a roller ring having a plurality of cylindrical roller shafts aligned to mesh with said toothed cam and thereby permitting the transfer of torque from one shaft to the other.
    Type: Application
    Filed: July 13, 2004
    Publication date: December 9, 2004
    Inventor: Richard N. Ballard
  • Roller cam assembly
    Publication number: 20030195076
    Abstract: This document discloses a transmission having a roller cam assembly which comprises a pair of drive shafts, one an input shaft and the other an output shaft, wherein one of said shafts is attached to a toothed cam having a trochoidal profile and the other drive shaft is attached to a roller ring having a plurality of cylindrical roller shafts aligned to mesh with said toothed cam and thereby permitting the transfer of torque from one shaft to the other.
    Type: Application
    Filed: April 11, 2002
    Publication date: October 16, 2003
    Inventor: Richard N. Ballard