# US 9,433,946 B2 · Mobile apparatus for comminuting lumpy material

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- Number: US 9,433,946 B2
- Document ID: US9433946B2
- Status: Granted
- Kind: B2
- Application number: 14/370,567
- Filed: 2013-01-04
- Published: 2014-12-18
- Granted: 2016-09-06
- Earliest claimed: 2012-01-05
- Assignees: Kormann Rockster Recycler GmbH
- Applicants: Kormann Rockster Recycler GmbH
- Inventors: Wolfgang Kormann
- Web page: https://patentgrep.com/patent/US9433946B2

## CPC

- B02C 23/12: with return of oversize material to crushing or disintegrating zone
- B02C 21/026: {self-propelled}
- B02C 23/02: Feeding devices ({for grain mills B02C11/04; for roller mills B02C4/286}; transport devices in general B65G)
- 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 mobile apparatus for comminuting lumpy material, especially rock, includes a chassis, a crusher arranged on the chassis, a feed device, provided on the chassis, for the lumpy material to be fed to the crusher and comminuted, a removal conveying device having a sieve device for the material comminuted by the crusher and a return conveying device for returning material held back by the sieve device to the feed device. In order to ensure heap separation of comminuted material of different grain sizes despite high crushing throughput, one conveying section of the return conveying device including at least two conveying sections is secured to the device by at least one rotational joint such that it can be turned away from the feed device.

## Claims

### Claim 1

Mobile apparatus for comminution of chunk material, the mobile apparatus comprising:
a chassis,
a crusher,
a charging device for the material to be fed to the crusher and to be comminuted,
a removal conveying device with a screening device for the material comminuted by the crusher, and
a return conveying device for return of the material retained by the screening device to the charging device, the return conveying device being divided into a first return conveying section and a second return conveying section, each of the first return conveying section and the second return conveying section being oriented in a direction of the charging device,
wherein the second return conveying section is fastened onto the apparatus by way of at least one rotational joint, so that the second return conveying section can be turned away from the charging device.

### Claim 2 (depends on 1)

Mobile apparatus according to claim 1, wherein the second return conveying section opens into the charging device.

### Claim 3 (depends on 1)

Mobile apparatus according to claim 1, wherein the rotational joint has a pin.

### Claim 4 (depends on 1)

Mobile apparatus according to claim 1, wherein the second return conveying section is mounted on the chassis.

### Claim 5 (depends on 1)

Mobile apparatus according to claim 1, wherein the second return conveying section is mounted on the chassis by way of a V-shaped support.

### Claim 6 (depends on 1)

Mobile apparatus according to claim 1, wherein the second return conveying section is structured so that it can be pivoted in terms of its inclination.

### Claim 7 (depends on 1)

Mobile apparatus according to claim 1, wherein the first return conveying section is configured, at least in part, as a first conveyor belt, and
wherein the second return conveying section is configured at least in part, as a second conveyor belt.

### Claim 8 (depends on 1)

Mobile apparatus according to claim 1, wherein the second return conveying section is configured as a discharge conveyor belt.

### Claim 9 (depends on 1)

Mobile apparatus according to claim 1, wherein the first return conveying section has a first angle of elevation, and
wherein the second return conveying section has a second angle of elevation.