# US 5,707,019 A · Refiner with easily attachable discs

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- Number: US 5,707,019 A
- Document ID: US5707019A
- Status: Granted
- Kind: A
- Application number: 08/610,192
- Filed: 1996-03-04
- Granted: 1998-01-13
- Earliest claimed: 1996-03-04
- Assignees: Aikawa Iron Works Co., Ltd.
- Inventors: Yoshihiko Aikawa
- Web page: https://patentgrep.com/patent/US5707019A

## CPC

- B02C 7/12: Shape or construction of discs
- D21D 1/306: {Discs}
- B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02})
- D21D: TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE

## Abstract

A refiner is formed of a plurality of first disc members provided on a casing and divided along a circumferential direction thereof; a plurality of first connecting members for fixing the first disc members to the casing; a plurality of second disc members provided on a runner with a rotating shaft, the second disc members facing the first disc members and divided along a circumferential direction thereof; and a plurality of second connecting members for fixing the second disc members to the runner. The refiner also includes engaging members provided on outer peripheral surfaces except for blade faces of the first disc members or the second disc members; and engaged members provided on at least one of the casing or the runner. When the rotating shaft is rotated, loads applied to the first connecting members or the second connecting members can be reduced greatly.

## Claims

### Claim 1

A refiner comprising,
a circular plate-shape runner having an outer periphery and two side faces;
a rotating shaft fixed to a center of the runner to extend perpendicularly thereto;
at least one annular rib projecting from said outer periphery of the runner in an axial direction of said rotating shaft to form a disc receiving dent portion at one of the side faces of the runner, said annular rib having a side surface, and inner and outer circumferential surfaces;
a plurality of discs having blades on side faces and outer peripheries, said discs being disposed in the disc receiving dent portion in the runner;
a plurality of engaging members provided on said outer peripheries of said discs to extend outwardly therefrom; and
a plurality of dent portions for receiving and engaging said engaging members provided in said at least one annular rib, each dent portion extending from the side surface along the axial direction of said rotating shaft and having a bottom surface extending along the side surface of the rib, a first surface and a second surface, said first and second surfaces facing each other and extending from said bottom surface to cross said inner and outer circumferential surfaces of the rib, said first surface facing a rotating direction of said circular plate-shape runner, said second surface facing a direction opposite to said rotating direction of said runner, said discs being fixed and supported onto said runner such that said engaging members contact said first surfaces of the dent portions.

### Claim 2 (depends on 1)

A refiner according to claim 1, wherein said second surface is inclined such that a space between the first and second surfaces is narrower on a far side than on a near side from a center of said runner, said discs being attached to said runner in a state where edges of said engaging members abut against said second surfaces.

### Claim 3 (depends on 2)

A refiner according to claim 2, wherein said discs are divided along a circumferential direction.

### Claim 4 (depends on 1)

A refiner according to claim 1, wherein each of said discs has one engaging member on the outer periphery thereof, each engaging member being a projection having a surface engaging the first surface of each dent portion so that when the runner is rotated around the rotating shaft, rotation of the discs is prevented.

### Claim 5 (depends on 4)

A refiner according to claim 4, wherein each projection has a rectangular shape, and each dent has a rectangular shape to immovably retain each projection therein.

### Claim 6 (depends on 5)

A refiner according to claim 5, further comprising connecting members for connecting the discs to the runner.

### Claim 7 (depends on 1)

A refiner according to claim 1, wherein said runner has the discs on both side faces symmetrically to each other.

### Claim 8 (depends on 7)

A refiner according to claim 7, further comprising a casing for rotationally receiving the runner with the discs therein, and second discs attached to the casing to face the discs formed on the runner.