Patents by Inventor Michael L. Render

Michael L. Render 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: 4331917
    Abstract: A speed and direction detector for rotating bodies such as gears (10) including a pair of spaced sensors (14) mounted adjacent the gear teeth (12) to develop phase-shifted alternating signal waveforms, and a decoder (20) to develop a sequence of output signal conditions (S0-S3) depending upon the relation between the alternating waveform values. Signal stage memories (26, 28, 30, 32, 34, 36) utilizing flip-flops and gates connect the decoder outputs to an up/down counter (42, 44) which is incremented or decremented according to gear rotation direction only if a complete signal condition sequence occurs.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: May 25, 1982
    Assignee: Caterpillar Tractor Co.
    Inventors: Michael L. Render, John T. Armstrong, Jr.
  • Patent number: 4208925
    Abstract: A control for the automatic shifting of a multi-ratio power transmission. A memory is provided and programmed with the optimum vehicle speed shift points for upshift and downshift from each gear of the automatic range. The actual speed of the vehicle is periodically sampled, and each time it is, such speed is compared with the shift points for the gear which the transmission is in to see if a shift from such gear should be made. If it is determined from the speed sample that an upshift should be made, then the upshift speed points of higher gears are examined with reference to such speed sample to find the gear to which the transmission should be upshifted, i.e., the gear just above the highest gear having an upshift speed point which is less than the sampled speed. Having found such gear, the transmission is shifted thereto.
    Type: Grant
    Filed: August 11, 1977
    Date of Patent: June 24, 1980
    Assignee: Caterpillar Tractor Co.
    Inventors: Robert G. Miller, Michael L. Render