Patents by Inventor Ronald J. Sporrer

Ronald J. Sporrer 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).

  • Hydrostatic transmission
    Patent number: 6397594
    Abstract: A hydrostatic transmission design incorporating a unique housing shape and configuration, including a vertical split of the two casing elements, which are shaped to conform to the internal components of the transmission. The center section of the transmission has a unique configuration including a trunnion mounted swash plate, means for mounting the center section to the transmission and a motor output shaft mounted below the pump running surface. The transmission also includes an expansion chamber, preferably secured externally to the sump, having a tube mounted therein to transfer hydraulic fluid between the chamber and the sump.
    Type: Grant
    Filed: January 3, 2001
    Date of Patent: June 4, 2002
    Assignee: Hydro-Gear Limited Partnership
    Inventors: Raymond M. Hauser, Lonnie E. Holder, John D. Schreier, Ronald J. Sporrer, Michael Lee Bennett
  • Hydrostatic transmission
    Publication number: 20010000847
    Abstract: A hydrostatic transmission design incorporating a unique housing shape and configuration, including a vertical split of the two casing elements, which are shaped to conform to the internal components of the transmission. The center section of the transmission has a unique configuration including a trunnion mounted swash plate, means for mounting the center section to the transmission and a motor output shaft mounted below the pump running surface. The transmission also includes an expansion chamber, preferably secured externally to the sump, having a tube mounted therein to transfer hydraulic fluid between the chamber and the sump.
    Type: Application
    Filed: January 3, 2001
    Publication date: May 10, 2001
    Inventors: Raymond M. Hauser, Lonale E. Holder, John D. Schreier, Ronald J. Sporrer, Michael Lee Bennett
  • Housing and center section for hydrostatic transmission
    Patent number: 6223531
    Abstract: A hydrostatic transmission design incorporating a unique housing shape and configuration, including a vertical split of the two casing elements, which are shaped to conform to the internal components of the transmission. The center section of the transmission has a unique configuration including a trunnion mounted swash plate, means for mounting the center section to the transmission and a motor output shaft mounted below the pump running surface. The transmission also includes an expansion chamber, preferably secured externally to the sump, having a tube mounted therein to transfer hydraulic fluid between the chamber and the sump.
    Type: Grant
    Filed: November 20, 1998
    Date of Patent: May 1, 2001
    Assignee: Hydro Gear Limited Partnership
    Inventors: Raymond M. Hauser, Lonnie E. Holder, John D. Schreier, Ronald J. Sporrer, Michael Lee Bennett
  • Swashplate leveling device
    Patent number: 5207144
    Abstract: A swashplate leveling device has a reciprocative leveling follower movable along a fixed axial pin. The cam is biased into engagement with a swashplate of an axial piston variable displacement hydraulic unit to position the swashplate in a zero displacement orientation when there is no control input to the hydraulic unit. The leveling device has a pair of contact points, one positioned on each side of the swashplate tilt axis in a manner that both contact points engage the swashplate when it is leveled to its zero displacement orientation.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: May 4, 1993
    Assignee: Sauer, Inc.
    Inventors: Ronald J. Sporrer, Scott D. Meyer