Patents by Inventor Robert C. Horst

Robert C. Horst 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).

  • Engine system having dedicated thermal management system
    Patent number: 7886705
    Abstract: A thermal management system for an engine is disclosed. The thermal management system may have a first hydraulic circuit configured to circulate a fluid through the engine. The thermal management system may also have a second hydraulic circuit pressurized by the engine to heat the fluid during operation of the engine.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: February 15, 2011
    Assignee: Caterpillar Inc.
    Inventors: Dennis P. Holler, Scott D. Vollmer, Travis S. Johnson, Sudhakar R. Kakani, Matthew R. Hulen, Randall J. Anliker, Michael W. Edwards, Larry L. Spurgeon, Victor L. Sheldon, Jr., Robert C. Horst
  • Engine system having dedicated thermal management system
    Publication number: 20080295791
    Abstract: A thermal management system for an engine is disclosed. The thermal management system may have a first hydraulic circuit configured to circulate a fluid through the engine. The thermal management system may also have a second hydraulic circuit pressurized by the engine to heat the fluid during operation of the engine.
    Type: Application
    Filed: February 7, 2008
    Publication date: December 4, 2008
    Inventors: Dennis P. Holler, Scott D. Vollmer, Travis S. Johnson, Sudhakar R. Kakani, Matthew R. Hulen, Randall J. Anliker, Michael W. Edwards, Larry L. Spurgeon, Victor L. Sheldon, JR., Robert C. Horst
  • Variable displacement hydrostatic pump and improved gain control thereof
    Patent number: 5226349
    Abstract: A variable displacement axial piston pump (11) is disclosed of the type including a displaceable cam member (39) to vary the pump displacement in response to operation of a fluid pressure actuated servo assembly (15). The servo assembly includes a servo piston (47), the position of which is controlled in response to control fluid in a pair of servo chambers (53,55). The flow of control fluid pressure from a charge pump (27) to the servo chambers is controlled by a manual controller (17), which includes a main control orifice (105). The nominal gain rate of the pump and servo assembly is determined largely by the main control orifice (105). The servo piston (47) defines a servo orifice (113) communicating between the servo chambers.
    Type: Grant
    Filed: July 15, 1992
    Date of Patent: July 13, 1993
    Assignee: Eaton Corporation
    Inventors: Nathan J. Alme, Robert C. Horst
  • Dual-mode control for hydrostatic transmission
    Patent number: 5108267
    Abstract: A variable displacement hydrostatic unit (11) includes a swashplate (23), the position of which is controlled by a servo piston (73). A multiple mode control (33) is disclosed, including a main valve member (63) and a secondary valve member (65), both of which are attached to a linkage member (61) by which movement of a manual control handle (47) actuates the main and secondary valve members. The flow of control pressure from a charge pump (21) ot the servo piston (73) is controlled by a pair of solenoid valves (83,85) having two control conditions. In one, control pressure flows through the main valve member (63) to give a normal operating mode (FIG. 6), while in the other control condition, control pressure flows through the secondary valve member (65) to provide a secondary operating mode (FIG. 7).
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: April 28, 1992
    Assignee: Eaton Corporation
    Inventor: Robert C. Horst