Norio Shiraishi

Title: Norio Shiraishi: Innovator in Prosthetic Technology

Introduction

Norio Shiraishi is a prominent inventor based in Kobe, Japan, known for his significant contributions to prosthetic technology. With a total of four patents to his name, Shiraishi has developed innovative solutions that enhance the functionality and usability of prosthetic limbs.

Latest Patents

One of Shiraishi's latest patents is an air-cylinder apparatus for prosthetic limbs. This apparatus effectively adjusts the pressure characteristics over a wide range of walking speeds. It features a second chamber defined by a piston, which increases in pressure as air is confined within it, responding to the bending motion of the knee. The design includes a constant throttle valve that restricts air from flowing out of the second chamber. Additionally, the second chamber is divided into multiple chambers based on the bending angle of the knee, with corresponding throttle valves to manage air flow.

Another notable patent is for a prosthetic leg with an extension auxiliary mechanism. This mechanism generates an extension torque only when the knee is bent at a small angle. The knee joint of the thigh prosthesis is structured as a multi-axis system, and the extension auxiliary mechanism, supported by a compression spring, plays a crucial role in the functionality of the prosthetic leg. As the bending angle of the knee exceeds a certain degree, the mechanism ensures that the extension torque becomes negligible, allowing for a more natural movement.

Career Highlights

Norio Shiraishi is associated with Nabco Limited, a company that focuses on advanced technologies in the field of prosthetics. His work has significantly impacted the design and functionality of prosthetic devices, making them more adaptable to the needs of users.

Collaborations

Shiraishi has collaborated with notable colleagues, including Masahiko Okuda and Yasukazu Furuichi. Their combined expertise has contributed to the development of innovative prosthetic solutions.

Conclusion

Norio Shiraishi's contributions to prosthetic technology exemplify the importance of innovation in improving the quality of life for individuals with limb loss. His patents reflect a commitment to enhancing mobility and functionality through advanced engineering solutions.