Location History:
- Kariya, JP (1999)
- Toyota, JP (1998 - 2000)
Company Filing History:
Years Active: 1998-2000
Title: Innovations of Keiichi Matsushima
Introduction
Keiichi Matsushima is a prominent inventor based in Toyota, Japan. He has made significant contributions to the field of automotive technology, particularly in starter systems. With a total of 10 patents to his name, Matsushima's work has had a considerable impact on the industry.
Latest Patents
One of his latest patents is for a starter having a pinion rotation restricting member and plunger movement. In this invention, a plate that turns with a pinion moving body is disposed behind the pinion moving body. The plate features a receiving part that engages with the lower extension of a rotation restricting member, which restricts the rotation of the pinion moving body until a pinion gear engages with a ring gear. Additionally, in a power supply circuit for a starter motor, a first switch and a second switch are provided. The first switch turns on first to energize the starter motor. When the pinion gear engages with the ring gear thereafter, the second switch turns on to further energize the starter motor by short-circuiting a resistor wire.
Another notable patent is for a brush holding device. In this invention, a starter having a motor yoke, a housing, and an end frame forms a cylindrical starter frame. A cylindrical thermal insulation cover is fitted around the starter frame through rubber-made elastic rings. The rings are tightly fitted in V-shaped grooves formed circumferentially on fitting faces, one being between the housing and the yoke and the other being between the yoke and the end frame. Each ring is pressed radially inward by a large diameter part of the thermal insulation cover to fill in the V-shaped groove and contact the fitting face. Furthermore, in a motor for the starter, a resilient plate sheet is disposed between a commutator and a brush holder to return a brush passing therethrough to the original position when the brush tends to move during sliding contact with the commutator.
Career Highlights
Keiichi Matsushima has dedicated his career to advancing automotive technology through innovative designs and solutions. His work at Denso Corporation has positioned him as a key figure in the development of starter systems.
Collaborations
Matsushima has collaborated with notable coworkers such as Tsutomu Shiga and Masanori Ohmi, contributing to various projects that enhance automotive performance and reliability.
Conclusion
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.