Nitto Kohki Co., Ltd.

Niles Parts Company, Ltd.

Man Design Co., Ltd.

Masaaki Tanabe

Toshio Osada

Tamotsu Mori

Toshio Mikiya

Shigeru Kobayashi

Giichiro Shimizu

Atsuki Hashimoto

Iwaji Shiomi

Nobuo Ishibashi

Akira Takanaka

Hirokazu Nagai

There is provided a compressor having two compression portions arranged in parallel. A compression chamber is formed into an air-tight chamber surrounded by a head of a piston, a cylinder, and a head cover. A discharge chamber is provided to the periphery of each cylinder, and these discharge chambers communicate with each other by a through hole. Two field cores of each electromagnet for driving each piston are formed in the integral structure, and a half wave of an alternating electric current is supplied to each coil wound around these coils in such a manner that the excitation directions of the respective field cores are opposed from each other.

Electromagnetic reciprocating compressor

A blower supplies compressed air to a predetermined place. The blower is provided with a plurality of compressors, a common air tank for storing compressed air supplied from the compressors, a changeover valve for switching the compressed air taken in from the air tank between a first supply state and a second supply state, and a controller for controlling operations of the compressors and the switching operation of the changeover valve. The controller can select one operation pattern from among a plurality of operation patterns determined by combinations between the compressors and the changeover valve.

Blower

An electromagnetic relay, having a core 3 fixed by press-fitting in a yoke 4, which is facilitated in attaching operation and eliminated of the possibility, during press-fitting, of being placed in poor contact by metal chips produced by cutting away the yoke 4 by the core 3. The core 3 is provided with a smaller diameter portion 3c at an end portion and is inserted into a center of a bobbin 1 having a coil 2 wound therearound. A cutout 5 is formed in the yoke 4 so as to receive by press-fitting the smaller diameter portion 3c of the core 3. First slant surfaces 6 are formed in the edge of an opening of the cutout 5 such that the wall thickness becomes thinner toward the opening. Second slant surfaces 7 are provided in the form of curved surfaces at the terminal ends of the first slant surfaces in a manner smoothly continuing to a general surface of the yoke 4 and also to the first slant surfaces 6. The terminal ends of the second slant surfaces 7 are positioned on a diametrical center line of the core 3 when the core 3 is attached to the yoke 4.

Electromagnetic relay

An electromagnetic reciprocating pump comprising of a closed-type casing provided with a cylinder in front thereof, a main shaft as least the front end of which is fixed to the casing, a piston having a piston head in front thereof, which piston is slidably fitted over the outer periphery of the main shaft to reciprocate, and coaxially supporting an armature, a spring disposed between the piston and the casing for biasing the piston in one direction, an electromagnet fixed to the casing so as to attract the armature in the opposite direction against the biasing force of the spring, suction ports and suction valves for sucking a fluid into a pressure chamber defined by the cylinder and the piston head, and a discharge port and a discharge valve for discharging the pressurized fluid from the pressure chamber.

Electromagnetic reciprocating pump

A solenoid-operated reciprocating pump includes a casing having a cylinder with a central axis. A main shaft is disposed in and secured at one end to the casing in alignment with the central axis of the cylinder. A piston having a piston head is slidably fitted over the main shaft such that the piston head is disposed within the cylinder for axial motion. A coil spring extends between the piston and casing to bias the piston in a first axial direction and an armature radially extends from the outer periphery of the piston for interaction with an electromagnet disposed around the longitudinal periphery of the piston. The electromagnet attracts the armature and hence the piston in a second axial direction opposite from the first direction. On end of the coil spring is fixed to one of the piston or the casing and the other end of the spring is rotatably supported on the other of the piston or the casing by a spring retainer seated on a plurality of spherical balls which are in turn seated on said other of the piston or the casing means. The balls are positioned at equal distances radially from the central axis of the coil spring and at equal circumferential spacings around the axis.

Solenoid-operated reciprocating pump

A magnet holder for an electromagnetic diaphragm pump comprising a reinforcing member having at least in part thereof a width smaller than the distance between a pair of magnets placed in the predetermined positions in magnet insertion windows is provided integrally with the magnet holder between the pair of magnet insertion windows for juxtaposing and holding a pair of flat plate-shaped magnets in the same plane, so that the mechanical strength of the magnet holder is prevented from decreasing. And positioning members may be formed in the reinforcing member for pressing the pair of magnets inserted into the magnet insertion windows toward the diaphragms attached to opposite ends of the magnet holder, thereby positioning the magnets with enough accuracy and determining the distance between the magnets.

Magnet holder for electromagnetic diaphragm pump

An electromagnetic pump comprising fluid operation chambers for discharging fluid to the outside; and electromagnet connected to an AC power source device for polarity switching for every half cycle of AC when energized; a permanent magent which moves together with the electromagnets; and a reciprocative shaft holding the permanent magnet, which reciprocates in the shaft direction when the electromagnet is energized. The width of a securement portion for the permanent magnet of the reciprocative shaft is relatively narrow compared to the other portions, and the permanent magnet consists of a pair of permanent magnet pieces bonded together by sandwiching the securement portion therebetween. The electromagnetic pump further comprises a fluid operation member for expanding or contracting the volume in the fluid operation chamber by the reciprocation movement of the reciprocative shaft so as to guide fluid out.

Growing community of inventors

Tokyo, Japan

Masaaki Tanabe