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For the Inventor, By the Inventor

Hitachi, Japan

Hiroshi Nagase

USPTO Granted Patents = 27


Average Co-Inventor Count = 3.7

ph-index = 15

Forward Citations = 462(Granted Patents)


Location History:

  • Hitachi, JP (1978 - 2002)
  • Hitachinaka, JP (2006)

Company Filing History:

goldMedal27 out of 42,485 
 
Hitachi, Ltd.
 patents
silverMedal1 out of 34 
 
Hitachi Keiyo Engineering Co., Ltd.
 patents
bronzeMedal1 out of 1 
 
Hitachi Keiyo Eng. Co., Ltd.
 patent
where one patent can have more than one assignee

Years Active: 1978-2006

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27 patents (USPTO):
1. 7137483 - Rope and elevator using the same (2006-11-21),
2. 6382361 - Elevator (2002-05-07),
3. 5403674 - Conductive material and process for preparing the same (1995-04-04),
4. 5271871 - Conductive material and process for preparing the same (1993-12-21),
5. 5085806 - Conductive material and process for preparing the same (1992-02-04),
6. 5019773 - Method and apparatus for detecting positions and/or speed of a moving (1991-05-28),
7. 4983875 - Actuator (1991-01-08),
8. 4965504 - Control apparatus for inverter for driving AC motor (1990-10-23),
9. 4629959 - Method and apparatus for controlling PWM inverter (1986-12-16),
10. 4611158 - Method and apparatus for controlling PWM inverter (1986-09-09),
11. 4532464 - Control apparatus for induction motor (1985-07-30),
12. 4524310 - Method and apparatus of controlling induction motors (1985-06-18),
13. 4516065 - Control apparatus for AC motors (1985-05-07),
14. 4486824 - PWM Converter with control circuit responsive to minimum holding current (1984-12-04),
15. 4459534 - Method for controlling induction motor and apparatus therefor (1984-07-10),

Title: **Hiroshi Nagase: Innovator in Elevator Technology**

Introduction

Hiroshi Nagase is a prominent inventor based in Hitachi, Japan, known for his remarkable contributions to elevator technology. With a total of 27 patents to his name, Nagase has been instrumental in enhancing the safety and reliability of elevator systems through his innovative designs.

Latest Patents

Among his latest inventions is a patented rope and elevator system designed to improve the efficiency and durability of elevators. This invention employs a unique wire rope, where individual element wires are coated with a resin material, protecting them from wear due to friction and contact with the sheave. This innovation allows for a reduction in the sheave diameter while maintaining the integrity of the rope, ultimately leading to a smaller and lighter elevator system. Additionally, he has patented an advanced elevator system that utilizes a pulley mechanism for better control and efficiency. This system incorporates an electric power receiving unit, inverter, motor, and position sensor, working in unison to enhance the overall operation of the elevator car and counterweight.

Career Highlights

Hiroshi Nagase has held significant positions at Hitachi, Ltd. and Hitachi Keiyo Engineering Co., Ltd., where he channeled his expertise in engineering to develop leading-edge technologies for elevator systems. His innovative work has garnered attention within the industry, leading to numerous advancements in mechanical design and functional safety.

Collaborations

Throughout his career, Nagase has collaborated with esteemed colleagues such as Toshiaki Okuyama and Yuzuru Kubota. Their collective efforts have fostered an environment of innovation, enabling them to achieve groundbreaking developments in elevator technology.

Conclusion

Hiroshi Nagase's dedication to innovation has made a lasting impact in the field of elevator technology. Through his numerous patents and collaborative efforts, he continues to contribute to advancements that enhance safety, reliability, and efficiency in vertical transportation systems, shaping the future of elevators worldwide.

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