Location History:
- Shizuoka, JP (2004)
- Shimada, JP (1993 - 2006)
Company Filing History:
Years Active: 1993-2006
Title: Hidemasa Umehara: Innovator in Drive Devices
Introduction
Hidemasa Umehara is a notable inventor based in Shizuoka, Japan. He has made significant contributions to the field of drive devices, particularly in the context of stepper motors. With a total of 4 patents to his name, Umehara continues to push the boundaries of innovation in his industry.
Latest Patents
One of Umehara's latest patents is a drive device for stepper motors and an indicating apparatus using the same. This innovative drive device includes stepper motors, each equipped with an excitation coil and a rotor that rotates based on variations in the excitation state of the coil. The device features driven members that move in accordance with the rotor's rotation, stoppers that mechanically halt the driven member at a zero position, and a controller that manages the stepper motors. The controller can perform either a normal operation, where the motor rotates, or a zero-position detection operation, where the motor moves the driven member to the stopper. Notably, the controller initiates the zero-position detection operation simultaneously across all stepper motors, switching to normal operation for any motor that completes the detection without waiting for others.
Another significant patent involves an initializing drive apparatus. This apparatus controls the excited states of excitation coils at a dual excitation step, inputting excitation pulses with a duty ratio of less than 1 at controlled intervals. The contact detecting means in this apparatus detects contact based on voltages generated at the excitation coils when excitation pulses are not being inputted.
Career Highlights
Hidemasa Umehara is currently employed at Yazaki Corporation, where he applies his expertise in developing advanced drive devices. His work has been instrumental in enhancing the functionality and efficiency of stepper motors, contributing to various applications in the industry.
Collaborations
Umehara collaborates with talented coworkers, including Yoshihisa Yamada and Kazuya Tsubaki. Their combined efforts foster an environment of innovation and creativity, leading to the development of cutting-edge technologies.
Conclusion
Hidemasa Umehara stands out as a prominent inventor in the field of drive devices, with a focus on stepper motors. His innovative patents and collaborative spirit continue to drive advancements in technology.