Mamoru Hosogai

Title: Mamoru Hosogai: Innovator in Solenoid Actuator Technology

Introduction

Mamoru Hosogai is a distinguished inventor based in Sagamihara, Japan. He has made significant contributions to the field of solenoid actuators, holding a total of 3 patents. His innovative designs have enhanced the functionality and efficiency of hydraulic equipment.

Latest Patents

One of his latest patents involves a solenoid actuator that is attached to hydraulic equipment. This actuator comprises a shaft connected to the hydraulic equipment, a plunger fixed to the shaft, and a coil that magnetically drives the plunger. The design includes a first bearing and a second bearing that support the shaft on either side of the plunger. A plunger front chamber is formed between the first bearing and the plunger, while a plunger rear chamber is formed between the plunger and the second bearing. By providing a plunger exterior oil passage on the outside of the plunger to connect the plunger front chamber to the plunger rear chamber, working oil flows through the passage every time the plunger strokes. This innovative feature prevents the deposit of contaminants on the plunger without increasing stroke resistance.

Another notable patent by Hosogai describes a solenoid actuator that consists of a case made of magnetic material housing a coil wound on a bobbin. A pressure tube made of non-magnetic material is fitted into a hollow portion of the bobbin. The design includes a base and a sleeve made of magnetic material disposed in the pressure tube. A plunger provided in an operation chamber formed in the base and sleeve strokes according to the energization of the coil, axially driving a shaft fixed to the plunger. The pressure tube ensures that magnetic flux is transferred between the case and the sleeve while preventing pressure variation in the operation chamber from being transmitted to the bobbin. This design achieves high response and pressure tightness in the solenoid actuator.

Career Highlights

Mamoru Hosogai is currently employed at Kayaba Industry Company, Ltd., where he continues to innovate and develop advanced technologies in hydraulic systems. His work has significantly impacted the efficiency and reliability of hydraulic equipment.

Collaborations

He has collaborated with notable coworkers, including Hideki Yamagata and Hideki Tsuchiya, contributing to various projects that enhance the capabilities of solenoid actuators.

Conclusion

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