This inventor holds 2 USPTO granted patents. Top assignees: National Aerospace Laboratory of Science Technology Agency, The Director of National Aerospace Laboratory of Science and Technology. Active years: 1985-1987.
Company Filing History:
1 out of 16 
1 out of 3 Years Active: 1985-1987
Title: Etsuo Ohtsuki: Innovator in Rocket Combustion Technology
Introduction
Etsuo Ohtsuki is a notable inventor based in Sendai, Japan. He has made significant contributions to the field of rocket combustion technology, holding a total of 2 patents. His innovative approaches have advanced the efficiency and effectiveness of rocket engines.
Latest Patents
Ohtsuki's latest patents include a "Rocket combustion chamber cooling wall of composite cooling type." This invention features a cooling wall designed for a regenerative cooling rocket combustion chamber. The throat portion, which experiences the highest heat load, is constructed from a porous material that utilizes a perspiring cooling action. The remaining areas, where the heat load is comparatively lower, are cooled using conventional forced convection. This composite cooling system achieves a high cooling effect while minimizing pressure loss in the cooling passages, resulting in a lightweight design and extended engine life.
Another significant patent is the "Method of manufacturing a rocket combustion chamber." This invention focuses on an improved method utilizing powder metallurgy for creating the grooved cooling wall of a liquid-propellant rocket combustion chamber. The inner cylinder of the cooling wall is designed with cooling grooves, which are densely filled with a filler such as paraffin wax. Subsequently, metal powder, which matches the material of the inner cylinder, is compression-molded around it to a predetermined thickness. After the paraffin wax is evaporated and removed, the metal powder body undergoes sintering in a furnace. This process results in a rigid bond between the inner and outer cylinders through a sintering reaction.
Career Highlights
Etsuo Ohtsuki has held prominent positions in the aerospace sector. He served as the Director of the National Aerospace Laboratory of Science and Technology and the National Aerospace Laboratory of the Science Technology Agency. His leadership in these organizations has contributed to advancements in aerospace research and development.
Collaborations
Throughout his career, Ohtsuki has collaborated with notable colleagues, including Hiromi Gomi and Masaki Sasaki. These partnerships have fostered innovation and progress in their shared field of expertise.
Conclusion
Etsuo Ohtsuki's contributions to rocket combustion technology exemplify his innovative spirit and dedication to advancing aerospace engineering. His patents reflect a commitment to improving the efficiency and performance of rocket engines, making a lasting impact in the industry