Fujikoki Corporation

National Institute for Materials Science

Hitoshi Umezawa

Yasushi Inoue

Yusuke Arai

Hiroshi Kawarada

Takeshi Kannoo

Yoshihiko Takano

Eiichi Sasada

Kouji Higuchi

Minoru Tachiki

Kensaku Kobayashi

Tomoari Ouchi

Naoya Kurosawa

Masanori Nagao

Kannoo Takeshi

To provide a multi-way selector valve properly used for a vehicle, with a smooth flow path switching operation even in case of a large pressure difference between the inside and outside of a valve body, a reduced refrigerant passing noise at a time of switching a flow path, and an easy flow path switching operation, the multi-way selector valve includes a valve bodyrotated by a flow path switching actuator, and a valve main bodyrotatably holding the valve body, the flow path switching actuator is a stepping motorincluding a rotorplaced on the inner peripheral side of a canand a statorplaced on an outer periphery of the can, and a planetary gear type speed reduction mechanismis inserted between the rotorof the stepping motorand the valve body

Multi-way selector valve

A heavily boron-doped diamond thin film having superconductivity is deposited by chemical vapor deposition using gas mixture of at least carbon compound and boron compound, including hydrogen. An advantage of the diamond thin film deposited by the chemical vapor deposition is that it can contain boron at high concentration, especially in (111) oriented films. The boron-doped diamond thin film deposited by the chemical vapor deposition shows the characteristics of typical type II superconductor.

Superconductivity in boron-doped diamond thin film

A motor-operated valve includes a driving unit including a rotor and a stator, a feed screw mechanism, and a valve main body unit. In order to remove backlash intrinsic in the feed screw mechanism, a coil spring that urges a valve body in a direction away from a valve seat is arranged in a valve chamber. A spring bearing that forms a housing, in which the coil spring is housed, in the valve chamber is provided. Therefore, the large valve chamber is secured in the valve main body unit and passing sound is reduced when a fluid passes the motor-operated valve. Contact surfaces of the valve body and the coil spring can be aligning curved surfaces that absorb a bend of the coil spring.

Motor-operated valve

A motor-operated valve has a rotor unit in a can, and is rotationally driven by a stator unit. The rotation of the rotor unit is transmitted to a screw feed member. A stem member fixed to a valve body is engaged threadedly with the screw feed member by a first screw portion. At the same time, the screw feed member is engaged threadedly with an external thread portion fixed to a valve stem by the second screw portion. The first screw portion and the second screw portion constitute a differential screw mechanism, and feeds the valve stem according to a difference in pitch.

A small-sized motor operated valve is disclosed that has high output and high resolution by housing a reduction gear together with a rotor in a single can. A valve shafthaving a valve memberis inserted to a motor operated valve body. A rotoris disposed inside a canattached to the body, and inside the rotoris housed a reduction gear. The output of the rotor is input to a sun gearand transmitted to planetary gears. The planetary gearsare engaged both with the fixed gearand the output gear, and the output gearis driven at reduced speed by a large reduction ratio. The output of the output gearis transmitted via a driverto a screw shaft, where it is converted into a linear movement and transmitted to the valve shaft

Motor operated valve with reduction gear

A motor-operated valve comprising a valve stem having a valve plug; a valve body having a valve seat with which the valve plug is enabled to removably contact; a can fixed to the valve body; a rotor disposed coaxially in the can; a stator disposed around an outer circumferential surface of the can; a guide bush fixedly secured to the valve body and having an axial hollow portion in which the valve stem is permitted to slidably move; and a valve stem holder; wherein the valve stem is enabled to rotate integral with the valve stem holder and to move in the longitudinal direction thereof relative to the valve stem holder. The motor-operated valve is further provided with a flow rate adjusting feed screw mechanism which is constituted by a first stationary threaded portion and a first movable threaded portion; and with a rotation regulating feed screw mechanism which is constituted by a second stationary threaded portion and a second movable threaded portion. The pitch of the flow rate adjusting feed screw mechanism is made smaller than the pitch of the rotation regulating feed screw mechanism.

An electrically operated flow control valve,comprises a can,fixed to the upper portion of a valve body,. A rotor member,is equipped inside a can,, and a stator member not shown in the drawing is equipped to the exterior of the can,. The can is formed by press-working a metal plate, and a flange portion,is formed to the opening. The can,is welded onto the valve body,, and a box nut,is used to firmly fix the can to the body, thereby improving the pressure resistibility of the valve.

Growing community of inventors

Tokyo, Japan

Hitoshi Umezawa