# US 8,464,973 B2 · Granulator mill

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- Number: US 8,464,973 B2
- Document ID: US8464973B2
- Status: Granted
- Kind: B2
- Application number: 12/996,890
- Filed: 2009-06-30
- Published: 2011-04-28
- Granted: 2013-06-18
- Earliest claimed: 2008-07-09
- Assignees: Rapid Granulator AB
- Applicants: Henrik Karlsson; Kurt Sjöberg; Ulf Henning
- Inventors: Henrik Karlsson; Kurt Sjöberg; Ulf Henning
- Web page: https://patentgrep.com/patent/US8464973B2

## CPC

- B02C 18/16: Details
- B02C 18/148: {specially adapted for disintegrating plastics, e.g. cinematographic films (for plastic bottles B02C19/0093, disintegrating plastics B29B17/00)}
- B02C 2018/162: {Shape or inner surface of shredder-housings}
- 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})

## Abstract

A granulator mill has a mill housing with a fixed section and an openable hatch, which is pivotally connected to the fixed section by the intermediary of a first pivot with a vertical pivot axis. The openable hatch has a first part and a second part, which are pivotally connected to one another by the intermediary of a second pivot with a vertical pivot axis.

## Claims

### Claim 1

A granulator comprising a granulator mill housing with a fixed section and an opening hatch which is pivotally connected to the fixed section by the intermediary of a first pivot with a substantially vertical first pivot axis, the granulator mill housing having a number of fixed knives, as rotor rotatably disposed in the granulator mill housing, with a number of knives, and a discharge section for discharging granulate material, wherein the opening hatch comprises a first part and a second part which are pivotally connected to one another at a second pivot with a substantially vertical second pivot axis.

### Claim 2 (depends on 1)

The granulator as claimed in claim 1, wherein the discharge section is divided, with a first part supported by and movable together with the first part of the hatch and a second part supported by and movable with the second part of the hatch.

### Claim 3 (depends on 1)

The granulator as claimed in claim 1, wherein both parts of the hatch have substantially the same length seen in a direction which, when the hatch is closed, is parallel with the avis of rotation of the rotor.

### Claim 4 (depends on 1)

The granulator as claimed in claim 1, wherein the second pivot has a pivotal range or sweep which amounts to substantially 180°.

### Claim 5 (depends on 1)

The granulator as claimed in claim 1, wherein the fixed section of the granulator mill housing has, between its end walls and secured therein, a beam whose longitudinal direction is parallel with the axis of rotation of the rotor; and that the hatch has, on its inside, an elongate strip or bead which, in the closed position of the hatch, rests on the beam.

### Claim 6 (depends on 1)

The granulator as claimed in claim 1, wherein the fixed knives are disposed exclusively in the fixed section of the granulator mill housing.

### Claim 7 (depends on 1)

The granulator as claimed in claim 1, wherein the hatch, with the discharge section disposed thereon, extends in beneath the rotor substantially to an area vertically under the axis of rotation of the rotor.