logo

For the Inventor, By the Inventor

Ushiku, Japan

Takashi Yagyu

This inventor holds 19 USPTO granted patents. Top assignees: Hitachi Construction Machinery Co., Ltd., Hitachi, Ltd.. Active years: 1985-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Takashi Yagyu. Retrieved from https://idiyas.com/inventor/takashi-yagyu

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 19

% Patents Active = 89.5

Average Co-Inventor Count = 4.5

ph-index = 5

Forward Citations = 101(Granted Patents)


Location History:

  • Tsuchiura, JP (2010)
  • Ibaraki, JP (1985 - 2012)
  • Ushiku, JP (1992 - 2016)

Company Filing History:

goldMedal19 out of 1,508 
 
Hitachi Construction Machinery Co., Ltd.
 patents
silverMedal2 out of 42,731 
 
Hitachi, Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1985-2016

Loading Chart...
19 patents (USPTO):Explore Patents
1. 9242589 - Dump truck body hoisting state display device (2016-01-26),
2. 9174562 - Transport vehicle (2015-11-03),
3. 8376476 - Brake system in electric drive dump truck (2013-02-19),
4. 8265849 - Drive system for electrically driven dump truck (2012-09-11),
5. 8249765 - Drive system for electrically driven dump truck (2012-08-21),
6. 8104842 - Transporter vehicle (2012-01-31),
7. 8033614 - Transporter vehicle (2011-10-11),
8. 7863837 - Drive system for electrically driven dump truck (2011-01-04),
9. 7841434 - Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicle (2010-11-30),
10. 7797935 - Hydraulic drive device for dump truck (2010-09-21),
11. 7740323 - Hydraulic drive device for vertical pivoting movement of load carrying platform (2010-06-22),
12. 7315144 - AC drive apparatus, vehicle control apparatus, and power conversion method and vehicle control method (2008-01-01),
13. 7175155 - Control valve apparatus and pressure circuit (2007-02-13),
14. 6122598 - Measurement and display of load of excavating blasted ground (2000-09-19),
15. 6055851 - Apparatus for diagnosing failure of hydraulic pump for work machine (2000-05-02),

Title: **Innovations and Achievements of Takashi Yagyu**

Introduction

Takashi Yagyu, an accomplished inventor based in Ushiku, Japan, has significantly contributed to the field of construction machinery with a total of 19 patents. His work primarily revolves around enhancing the functionality and safety of vehicles used in construction and transport.

Latest Patents

Among his latest inventions is the "Dump Truck Body Hoisting State Display Device." This innovative device features an angle detection unit that monitors the rotation angle of the dump truck body concerning its frame. Additionally, it includes a seating detection unit to determine whether the body is properly seated. The calculation unit then computes the inclination angle from a seated state to the maximum extension of the hydraulic cylinder, displaying this ratio clearly on a screen for operator awareness.

Another notable patent is the "Transport Vehicle Control Valve Device." This invention manages the supply and discharge of pressurized oil to a hoist cylinder that tilts the vehicle's vessel. It incorporates a throttle that moderates the flow rate of hydraulic oil while ensuring proper operation in the floating position of the directional control valve, thereby optimizing hydraulic performance.

Career Highlights

Throughout his career, Takashi Yagyu has worked with prestigious companies such as Hitachi Construction Machinery Co., Ltd. and Hitachi, Ltd. His role in these organizations allowed him to develop and refine many of his inventions, contributing to advancements in construction machinery.

Collaborations

Yagyu has collaborated with talented individuals in his field, including coworkers Yasuo Tanaka and Yutaka Watanabe. These partnerships have played a vital role in driving innovation and improving technology in vehicle design and functionality.

Conclusion

Takashi Yagyu's contributions to invention and innovation within the construction machinery sector are noteworthy. His patents reflect a commitment to improving safety and efficiency in vehicle operations, showcasing his expertise and dedication to technological advancement.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
Loading…