Patents by Inventor Hiromu Tomiyama

Hiromu Tomiyama 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: 5408745
    Abstract: In a method of producing crankshafts in a mass-production line, after a crankshaft casting is ground to its specified geometry, it is measured to detect a dynamic imbalance. Then, at least one radial balancing bore is drilled in a specified counterweight to a depth according to a resultant imbalance so as to balance the crankshaft if the crankshaft is judged, based on the resultant imbalance, to fall within a region in which a dynamic imbalance is eliminated by drilling bores. Otherwise, the crank shaft is removed out of the mass-production line if it is judged to be out of the region.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: April 25, 1995
    Assignee: Mazda Motor Corporation
    Inventors: Hiromu Tomiyama, Yuzo Uotani