Company Filing History:

19 out of 42,485

Hitachi, Ltd.

patents

3 out of 149

Hitachi Powdered Metals Co., Ltd.

where one patent can have more than one assignee

Years Active: 1990-2006

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19 patents (USPTO):Sort by Forward Citations

Abstract keywords

1. 7128528 - [object Object] (2006-10-31),

2. 6258293 - Refrigeration cycle (2001-07-10),

3. 6176094 - Refrigerating machine oil composition, and refrigeration and compressor using the refrigerating machine oil composition (2001-01-23),

4. 6029459 - Refrigeration cycle (2000-02-29),

5. 5964581 - Refrigerant compressor (1999-10-12),

6. 5711165 - Refrigerating apparatus and refrigerant compressor (1998-01-27),

7. 5591023 - Rotary type compressor (1997-01-07),

8. 5553465 - Refrigeration apparatus containing lubricant composition (1996-09-10),

9. 5494423 - Rotary compressor and blade tip structure (1996-02-27),

10. 5478220 - Compressor scroll made of silicon containing aluminum alloy (1995-12-26),

11. 5445753 - Lubricant for refrigeration compressors (1995-08-29),

12. 5423664 - Iron-base alloy for rotary type compressors (1995-06-13),

13. 5417872 - Lubricant composition, refrigeration apparatus containing same and (1995-05-23),

14. 5387272 - Highly ductile sintered aluminum alloy, method for production thereof (1995-02-07),

15. 5364248 - Sliding member, a method for producing same, and usages of same (1994-11-15),

Title: **Tadashi Iizuka: A Pioneer in Refrigeration Technology**

Introduction

Tadashi Iizuka, hailing from Ashikaga, Japan, is a renowned inventor with a remarkable portfolio consisting of 19 patents. His groundbreaking work in the field of refrigeration technology has significantly contributed to advancements in compressor-use bearings, enhancing their reliability and longevity.

Latest Patents

Iizuka's latest patents focus on high-reliability and long-life compressor-use bearings, designed specifically for COrefrigerant applications. These innovative bearings utilize materials that exhibit exceptional wear and baking resistance. The bearings feature a cylindrically shaped member, primarily composed of a graphite-containing carbonaceous base material infused with tin or metals from specific groups. His patents stipulate various requirements that ensure peak performance, such as a specified range for graphite content, Shore hardness, compressive strength, and porosity, making them suitable for use in compressors, air conditioners, refrigerators, and hot-water supply machines.

Career Highlights

Throughout his career, Tadashi Iizuka has been instrumental in the development of refrigeration technology while working with esteemed organizations such as Hitachi, Ltd. and Hitachi Powdered Metals Co., Ltd. His contributions to these companies have played a vital role in advancing the efficiency and effectiveness of refrigeration systems.

Collaborations

Iizuka has collaborated with other notable inventors, including Hiroaki Hata and Reishi Naka. Their collective efforts have fostered an innovative environment that encourages the development of new technologies in the refrigeration sector.

Conclusion

Tadashi Iizuka's extensive experience and innovative mindset have made him a significant figure in the invention of compressor-use bearings. His commitment to enhancing product reliability and performance continues to impact the refrigeration industry positively, ensuring that his inventions remain relevant in today’s technological landscape.

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