Company Filing History:

15 out of 2,333

Hitachi Metals, Ltd.

Hitachi Metals Kiko, Ltd.

patents

where one patent can have more than one assignee

Years Active: 1981-1997

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5691581 - Arm assembly and voice coil motor (1997-11-25),

2. 5581422 - Actuator with moveable coil and recording apparatus (1996-12-03),

3. 5576583 - Swing-type actuator (1996-11-19),

4. 5459359 - Swing-type actuator (1995-10-17),

5. 5168185 - Swing-type actuator (1992-12-01),

6. 5168184 - Swing-type actuator (1992-12-01),

7. 5165090 - Swing-type actuator (1992-11-17),

8. 5113162 - Focus magnet with separate static and dynamic control coils (1992-05-12),

9. 5087844 - Linear motor (1992-02-11),

10. 5057723 - Linear motor (1991-10-15),

11. 4888506 - Voice coil-type linear motor (1989-12-19),

12. 4758750 - Linear motor of moving-coil type (1988-07-19),

13. 4602232 - Electromagnetic drive unit (1986-07-22),

14. 4490815 - Actuator for use in a pickup device for a video disk player (1984-12-25),

15. 4422060 - D.C. Electromagnetic actuator (1983-12-20),

Title: Teruo Umehara: Innovator in Motion and Magnetic Technology

Introduction

Teruo Umehara, an esteemed inventor based in Hanyu, Japan, has made significant contributions to the fields of motion and magnetic technologies. With an impressive portfolio of 16 patents, Umehara continues to push the boundaries of innovation, creating devices that enhance the functionality of various applications.

Latest Patents

Among Umehara's latest inventions is the **arm assembly and voice coil motor**. This innovative design features an arm member made up of a rotatable boss, several thin, non-magnetic metal arm plates, and a coil member that operates swingably within a magnetic gap. The design ensures stability and robustness through the use of a thermoplastic resin that firmly integrates at least one arm plate with the boss member.

Another notable invention is the **actuator with movable coil and recording apparatus**. This actuator consists of a permanent magnet assembly and an upper yoke element designed to contain the magnetic field effectively. The base member, made of thermoplastic resin, unifies the system, maintaining a magnetic gap essential for the movable coil attached to the swingable arm. Together, these inventions reflect Umehara's expertise in creating efficient and dynamic mechanical components.

Career Highlights

Throughout his career, Teruo Umehara has collaborated with prestigious companies, including Hitachi Metals, Ltd. and Hitachi, Ltd. His tenure in these organizations has paved the way for groundbreaking innovations, particularly in the realm of actuator and motor technologies.

Collaborations

Umehara has had the privilege of working alongside talented individuals such as Norio Matsumoto and Fumihiko Takahashi. This collaborative environment has fostered a culture of innovation, allowing Umehara to refine his inventions and expand his impact on the industry.

Conclusion

Teruo Umehara stands out as a prominent figure in the world of invention and innovation. His patents reflect his dedication to enhancing technology in practical applications. As he continues to explore new frontiers, Umehara's contributions will undoubtedly leave a lasting legacy in the fields of motion and magnetic technology.

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