# US 4,395,746 A · Method and device for magnetically transporting

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- Number: US 4,395,746 A
- Document ID: US4395746A
- Status: Granted
- Kind: A
- Application number: 06/143,422
- Filed: 1980-04-24
- Granted: 1983-07-26
- Earliest claimed: 1979-05-02
- Assignees: Ishikawajima-Harima Jukogyo Kabushiki Kaisha; Tohoku Kinzoku Kogyo Kabushiki Kaisha
- Inventors: Hiroto Tanaka; Yasumasa Kohno; Hideyuki Tanaka; Kotaro Sasaki
- Web page: https://patentgrep.com/patent/US4395746A

## CPC

- F16L 55/24: Preventing accumulation of dirt or other matter in pipes, e.g. by traps, by strainers
- B03C 1/24: with material carried by travelling fields
- B65G 54/02: electrostatic, electric, or magnetic
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- B03C: MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS (separating isotopes B01D59/00; combinations of magnetic or electrostatic separation with separation of solids by other means B03B, B07B)
- B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D)

## Abstract

A method and device for magnetically transporting finely divided magnetic particles accumulated or deposited at a space. First a DC magnetic field is exerted to the finely divided magnetic particles so as to magnetize and bring them into an easy-to-be-handled state and then revolving alternating fields are exerted to the magnetized, finely divided magnetic particles, thereby magnetically transporting them.

## Claims

### Claim 1

Apparatus for transporting fine particles of which at least a part of magnetizable such as the CRUD particles accumulated in a nuclear reactor, comprising:
(a) first magnetic field source means for applying a stationary magnetic field to magnetize the particles prior to transport; and
(b) second magnetic field source means comprising a multi-phase generator with a plurality of ring-shapedly formed coils disposed on a cylindrical magnetic core and having a three-quarter full-pitch winding and operative on the particles magnetized by the first magnetic field source means for applying a revolving magnetic field to transport the magnetized particles.

### Claim 2 (depends on 1)

Apparatus according to claim 1 characterized in that the planes of the coils of the multi-phase generator are inclined by an angle of 30.degree. relative to the axis of the cylindrical core.

### Claim 3

Apparatus for transporting fine particles of which at least a part of magnetizable such as the CRUD particles accumulated in a nuclear reactor, comprising:
(a) a first magnetic field source means comprising a direct current generator having a coil secured to a core rotatable above its axis for applying a stationary magnetic field to magnetize the particles prior to transport; and
(b) second magnetic field source means operative on the particles magnetized by the first magnetic field source means for applying a revolving magnetic field to transport the magnetized particles.

### Claim 4 (depends on 3)

Apparatus according to claim 3 wherein the direct current operator core is rectilinear in axial direction and has an I-shaped cross section.