Location History:
- Fujisawa, JP (1996 - 2010)
- Yokohama, JP (1978 - 2011)
- Kawasaki, JP (2007 - 2011)
- Asaka, JP (2016)
- Tokyo, JP (2010 - 2024)
Company Filing History:
23 out of 42,496 
4 out of 107 
4 out of 9 
Years Active: 1978-2025
Areas of Expertise:
Title: The Innovative Contributions of Tsutomu Hara
Introduction
Tsutomu Hara, based in Yokohama, Japan, is a distinguished inventor known for his significant contributions to the field of leak testing technology. With an impressive portfolio of 39 patents, Hara's work showcases his innovative spirit and dedication to advancing engineering methodologies.
Latest Patents
Among his most recent patents is a novel "Method for Leak Testing and Reference Leak Device for Leak Testing." This innovative method encompasses a comprehensive leak testing step and a reference leak step. In the leak testing phase, a hollow workpiece serves as the test object and is encapsulated within a work capsule. A test pressure is communicated to the work capsule via a connected path. A pressure variation inside the capsule is then monitored when the path is shut-off, allowing for a determination of any leaks present in the workpiece based on the detected output. Concurrently, in the reference leak step, a reference leak device with a known pinhole is applied to a separate workpiece, designed for reference leakage. The workpiece for reference leakage is also encapsulated in a work capsule, with similar testing pressures applied. The resulting data from both the test and reference workpieces contribute to a nuanced understanding of potential leakage.
Career Highlights
Throughout his career, Hara has been associated with globally recognized companies, including Hitachi, Ltd. and Hosokawa Yoko Co., Ltd. His tenure in these organizations has played a pivotal role in the development and refinement of innovative technologies in leakage detection.
Collaborations
Tsutomu Hara has worked alongside notable colleagues such as Hideki Osaka and Tsunehiro Tobita. These collaborations have fostered a vibrant exchange of ideas, propelling advancements in their respective fields and leading to impactful inventions and patents.
Conclusion
In conclusion, Tsutomu Hara's contributions to the field of leak testing embody a blend of innovation and practical application. With a robust portfolio of patents and a noteworthy career defined by collaboration, Hara continues to inspire future generations of inventors and engineers. His work stands as a testament to the power of innovation in driving industry standards and enhancing technology across various applications.