Location History:
- Hyogoken, JP (1989)
- Amagasakishi, JP (1990 - 1991)
- Kobe, JP (1992 - 2007)
Company Filing History:
12 out of 75 
4 out of 69 
1 out of 1 Years Active: 1989-2007
Title: Tsutomu Shirakawa: Innovator in Precision Machinery
Introduction: Tsutomu Shirakawa, a notable inventor residing in Kobe, Japan, has contributed significantly to the field of precision machinery with a remarkable portfolio of 17 patents. His work primarily focuses on aligning drive mechanisms and positioning apparatuses, showcasing his innovative approach to enhancing machinery functionality.
Latest Patents: Among his latest innovations, two patents stand out. The first is an "Aligning Drive Mechanism and Positioning Apparatus Having This Mechanism." This invention features a housing designed in a reference block, equipped with an annular plug that is seamlessly integrated into a work pallet's positioning hole. An output member is vertically movable within the guide hole of the housing, allowing for enhanced alignment precision. The design includes a shuttle member that is diametrically expandable and contractible, ensuring effective positioning supported by a spring mechanism.
The second significant invention is the "Positioning Device," which includes a clamp pallet fixed to a machining center table. This device utilizes a tapered positioning hole in the work pallet, featuring a central pillar and an intermediate shuttle member. The shuttle member, also expandable and contractible, engages with the tapered positioning hole while being urged upward by an elastic member, facilitating reliable position fixing during machining operations.
Career Highlights: Tsutomu Shirakawa has made substantial strides in the realm of precision engineering, working with notable companies such as Kabushiki Kaisha Kosmek and Kosmek Ltd. His expertise in designing advanced mechanisms has positioned him as a leading figure in his industry, driving forward innovations that improve machining efficiency.
Collaborations: Throughout his career, Tsutomu has collaborated with esteemed colleagues, including Keitaro Yonezawa and Ichiro Miyata. These partnerships have fostered an environment of shared knowledge and creativity, further enhancing the development of cutting-edge machinery technologies.
Conclusion: Tsutomu Shirakawa’s contributions to innovation in precision machinery reflect his dedication and ingenuity as an inventor. With a robust patent portfolio and a track record of successful collaborations, he continues to influence the field significantly, paving the way for future advancements in technology.