Patents by Inventor Ronald L. Harkrader

Ronald L. Harkrader 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: 6102416
    Abstract: A mount for a rack and pinion steering gear on a body structure of a motor vehicle including a horizontal tubular boss on the steering gear parallel to a longitudinal centerline of the body structure, a tubular sleeve rigidly clamped to the body structure inside of the tubular boss having a pair of rigid flanges at opposite ends thereof, and an elastomeric bushing on the tubular sleeve between the rigid flanges. The elastomeric bushing has a tubular body bonded to the tubular sleeve and a plurality of integral linear splines compressed radially between the tubular sleeve and an inside cylindrical wall of the tubular boss. The linear splines flex resiliently to suppress the transfer of linear vibrations from the steering gear to the body structure.
    Type: Grant
    Filed: June 22, 1998
    Date of Patent: August 15, 2000
    Assignee: General Motors Corporation
    Inventors: Ronald L. Harkrader, Richard E. Jayroe, Stephan A. Stearns, Paula L. Payne
  • Patent number: 5421565
    Abstract: A suspension's coil spring insulator provides increased surface area insulation at the top and bottom end coil to vehicle spring seat mating points. Preassembly retention capability and radial location features are provided on the insulator.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: June 6, 1995
    Assignee: General Motors Corporation
    Inventors: Ronald L. Harkrader, Nickolas J. Ristich, Wayne B. Nelson
  • Patent number: 5146805
    Abstract: A pivot mount for a vehicular shift lever which precludes the play in the shift lever. The mount is employed in conjunction with a shift bowl that is rotatably mounted on a steering column. A clevis extends radially outwardly from the shift bowl, and the clevis has laterally spaced connecting plates. A bore penetrates each connecting plate. The bores through the connecting plates are registered. A shift lever having a mounting block is mounted from the clevis. The mounting block has laterally spaced, substantially parallel, first and second faces adapted to be embraced between the connecting plates. An aperture penetrates the mounting block and opens through the first and second faces to register with the bores through the connecting plates. A bushing assembly having an annular body portion with longitudinally spaced first and second rim edges is insertably received within the aperture which penetrates the mounting block.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: September 15, 1992
    Assignee: General Motors Corporation
    Inventors: Ronald L. Harkrader, Thomas C. Zebehazy
  • Patent number: 5070958
    Abstract: A variable effort power steering gear including detent elements in radial sockets in a pinion head, detent grooves in a stem of a stub shaft, an annular low speed reaction piston on the pinion head engageable on the detent elements when the low speed piston moves in a first direction, and an annular high speed reaction piston on the pinion head engageable on the detent elements when the high speed piston moves in a second direction opposite the first direction. Low and high speed bias springs apply first and second bias forces against the low and high speed reaction pistons. A control effects a fluid pressure gradient across the high speed piston in a low speed range of the steering gear counter to the second bias force so that in the low speed range only the first bias force is operative to urge the detent elements into the detent grooves and in the high speed range both the first and the second bias forces are operative to urge the detent elements into the detent grooves.
    Type: Grant
    Filed: March 15, 1991
    Date of Patent: December 10, 1991
    Assignee: General Motors Corporation
    Inventors: Stanley R. Goodrich, Jr., Ronald L. Harkrader
  • Patent number: 5070957
    Abstract: A variable effort automotive power steering gear including an input or stub shaft, an output shaft or pinion head, a torsion bar between the stub shaft and pinion head defining an open-center position of one relative to the other, and detent reaction apparatus between the stub shaft and pinion head. The detent reaction apparatus includes a radial socket in a cylindrical wall of the pinion head, a detent groove in a stem of the stub shaft in the cylindrical wall, an insert rotatably supported in the radial socket with an eccentric bore offset from the centerline of the radial socket, and a detent element slidably supported in the eccentric bore in the insert and having a spherical end adapted to seat in the detent groove. The spherical end of the detent element is centered in the detent groove by rotating the insert until the detent element is at an innermost radial position.
    Type: Grant
    Filed: November 20, 1990
    Date of Patent: December 10, 1991
    Assignee: General Motors Corporation
    Inventors: Ronald L. Harkrader, Stephen J. Reider
  • Patent number: 3937243
    Abstract: A valve for controlling the outlet pressure of a pump which supplies two systems. The valve permits flow through a first regulating portion to the primary system at a pressure equal to the secondary system pressure requirement. The secondary system preferably includes an accumulator and has an upper pressure requirement which is attained when the accumulator is filled. A second regulating portion of the control valve responds to secondary system pressure to permit bypassing of the first regulating portion when the secondary systems upper pressure requirement is satisfied. The second regulating portion closes when the lower limit is reached to permit refilling of the accumulator.
    Type: Grant
    Filed: September 25, 1974
    Date of Patent: February 10, 1976
    Assignee: General Motors Corporation
    Inventors: Ronald L. Harkrader, Dan R. Kimberlin