Eiichiro Tsujii

Title: The Innovative Contributions of Eiichiro Tsujii

Introduction

Eiichiro Tsujii is a notable inventor based in Hamamatsu, Japan. He has made significant contributions to the field of marine technology, particularly in the design and functionality of outboard drive units. With a total of eight patents to his name, Tsujii's work has had a considerable impact on the industry.

Latest Patents

One of Tsujii's latest patents is a tilt mechanism for outboard drive units. This invention features three embodiments of hydraulic assemblies that control the position of an outboard drive mounted on the transom of a watercraft. It allows the outboard drive to pop up when an underwater obstacle is struck and return to its normal position once the obstacle is cleared. Notably, one embodiment includes a hydraulic circuit that enables the return to various trim adjusted positions without the need for a floating piston. Additionally, a control valve assembly is provided for manual tilt and trim movement, accessible from either side of the unit.

Another significant patent is the tilt lock system for outboard motors. This hydraulic tilt lock mechanism resists popping up when the outboard drive is operated in reverse but allows it to pop up when an underwater obstacle is struck while traveling forward. The design includes a bypass passage for selectively bypassing the shock-absorbing function of the tilt lock mechanism, facilitating manual tilt and trim operations. A control valve arrangement is incorporated to manage the flow through this bypass passage, featuring an operator that moves along an axis parallel to the cylinder bore of the hydraulic tilt lock mechanism.

Career Highlights

Throughout his career, Tsujii has worked with prominent companies such as Sanshin Kogyo Kabushiki Kaisha and Sanshin Koygo Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in marine technology and innovation.

Collaborations

Tsujii has collaborated with notable coworkers, including Yoshiyuki Katsumata and Susumu Yamazaki. Their joint efforts have likely enhanced the development and refinement of his inventions.

Conclusion

Eiichiro Tsujii's innovative contributions to marine technology, particularly through his patents on outboard drive units, showcase his expertise and dedication to improving functionality in this field. His work continues to influence the industry and inspire future innovations.