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For the Inventor, By the Inventor

Nakashima-gun, Japan

Yasushi Yamanaka

This inventor holds 71 USPTO granted patents and 2 EPO patents, primarily in Refrigeration Systems (CPC class F25B). Top assignees: Denso Corporation, Nippondenso Co., Ltd., Nippon Soken, Inc.. Active years: 1988-2011.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasushi Yamanaka. Retrieved from https://idiyas.com/inventor/yasushi-yamanaka

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

USPTO Granted Patents = 71

% Patents Active = 74.6


Average Co-Inventor Count = 4.7

ph-index = 19

Forward Citations = 1,118(Granted Patents)

Forward Citations (Not Self Cited) = 1,101(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Nakashima, JP (1993 - 2001)
  • Aichi-ken, JP (2002)
  • Aichi-Pref., JP (2002)
  • Aichi, JP (1995 - 2003)
  • Kariya, JP (1988 - 2005)
  • Nakajima-gun, JP (2007)
  • Inazawa, JP (2008 - 2009)
  • Nakashima-gun, JP (1996 - 2011)

Company Filing History:

goldMedal42 out of 20,407 
 
Denso Corporation
 patents
silverMedal22 out of 3,252 
 
Nippondenso Co., Ltd.
 patents
bronzeMedal8 out of 1,600 
 
Nippon Soken, Inc.
 patents
4. 6 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1988-2011

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Areas of Expertise:
Vapor Compression
Refrigeration Cycle
Waste Heat Utilization
Air Conditioning
Fluid Machine
Heat Pump Cycle
Ejector Cycle
Vehicle Air Conditioner
Thermal Management
Condenser
Expansion Valve
Mechanical Energy Conversion
71 patents (USPTO):Explore Patents
1. RE42908 - Vapor-compression-type refrigerating machine (2011-11-14),
2. 7748226 - Waste heat utilizing system (2010-07-06),
3. 7650761 - Refrigerating device comprising waste heat utilization equipment (2010-01-26),
4. 7536869 - Vapor compression refrigerating apparatus (2009-05-26),
5. 7399167 - Fluid machine operable in both pump mode and motor mode and waste heat recovering system having the same (2008-07-15),
6. 7392655 - Vapor compression refrigerating device (2008-07-01),
7. 7287583 - Air-conditioning apparatus including motor-driven compressor for idle stopping vehicles (2007-10-30),
8. 7275983 - System for limiting an increase in the inside air temperature of passenger compartment of vehicle (2007-10-02),
9. 7260952 - Fluid machine (2007-08-28),
10. 7254961 - Vapor compression cycle having ejector (2007-08-14),
11. 7249459 - Fluid machine for converting heat energy into mechanical rotational force (2007-07-31),
12. 7178359 - Ejector cycle having multiple evaporators (2007-02-20),
13. 7178358 - Vapor-compression refrigerant cycle system with refrigeration cycle and Rankine cycle (2007-02-20),
14. 7159651 - Air conditioner for vehicle use (2007-01-09),
15. 7104061 - Fluid machine (2006-09-12),

Title: Yasushi Yamanaka: Innovator of Advanced Refrigeration Technologies

Introduction

Yasushi Yamanaka, an accomplished inventor based in Nakashima-gun, Japan, has made significant contributions to the field of refrigeration technologies. With an impressive portfolio of 71 patents, his innovations have revolutionized how refrigeration systems operate, increasing their efficiency and effectiveness.

Latest Patents

Yasushi's latest patents include a vapor-compression-type refrigerating machine and a waste heat utilizing system. The vapor-compression-type refrigerating machine features an internal heat exchanger that enhances the heat absorption capacity of the evaporator, thus allowing for stable operation without the need for a pre-load adjusting mechanism. This innovation optimizes the refrigeration process by cooling the refrigerant entering the expansion valve while simultaneously heating the refrigerant entering the compressor.

In his waste heat utilizing system, Yasushi has developed a mechanism to collect waste heat from internal combustion engines, significantly improving fuel consumption ratios. This system consists of a waste heat collecting cycle, an expansion device generating rotational force from the collected heat, and a refrigerating cycle that operates efficiently through a compressor device.

Career Highlights

Yasushi has had a notable career, working with esteemed companies such as Denso Corporation and Nippondenso Co., Ltd. His work in these organizations has led to significant advancements in the automotive and refrigeration sectors, demonstrating his pivotal role in enhancing energy efficiency and sustainability.

Collaborations

Throughout his career, Yasushi has collaborated with esteemed colleagues such as Kenichi Fujiwara and Shigeo Numazawa. These collaborations have fostered a creative environment that has contributed to numerous innovative solutions in the field of refrigeration technology.

Conclusion

Yasushi Yamanaka's contributions to refrigeration technology exemplify the spirit of innovation. His extensive patent portfolio not only showcases his inventive capabilities but also reflects his commitment to improving energy efficiency in mechanical systems. As technology continues to evolve, the impact of Yasushi’s work will resonate within the industry for years to come.

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]
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