# US 4,643,365 A · Apparatus for adding grinding media to a grinding mill

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- Number: US 4,643,365 A
- Document ID: US4643365A
- Status: Granted
- Kind: A
- Application number: 06/752,651
- Filed: 1985-07-08
- Granted: 1987-02-17
- Earliest claimed: 1984-07-17
- Assignees: Norcast Corporation
- Inventors: A. Meredith McKim
- Web page: https://patentgrep.com/patent/US4643365A

## CPC

- B02C 17/205: {Adding disintegrating members to the tumbling mill}
- 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

An apparatus for adding grinding media to a grinding mill is disclosed. The apparatus comprises a supporting structure including a face plate adapted to be mounted on a wall of a hopper or pipe containing the grinding media, a resilient rubber wheel mounted on the supporting structure and protruding through a slot in the face plate and said wall of the media container, and means for rotating said wheel at a low speed for withdrawing grinding media from said container and delivering the same to other conveyances for direction to the grinding mill.

## Claims

### Claim 1

An apparatus for adding grinding media to a grinding mill comprising:
(a) a supporting structure including a face plate adapted to be mounted on a wall of a container which contains the grinding media;
(b) a resilient rubber wheel mounted on the supporting structure and protruding through a slot in the face plate and said wall of the container;
(c) a shaft on which the wheel is mounted;
(d) a fixed disc mounted on the shaft; and
(e) a friction clutch engaging the disc for rotating said disc step by step at a low speed for withdrawing grinding media from said container and delivering the same to other conveyances for direction to the grinding mill.

### Claim 2 (depends on 1)

An apparatus, as defined in claim 1, further comprising a lever rocking arm connected at one end to the friction clutch for driving the fixed disc and the shaft and means for rocking the arm.

### Claim 3 (depends on 2)

An apparatus, as defined in claim 2, wherein the means for rocking the arm is a motor driven crank.

### Claim 4 (depends on 3)

An apparatus, as defined in claim 3 further comprising a speed reducer interconnecting said motor to said drive shaft.

### Claim 5 (depends on 2)

An apparatus, as defined in claim 2, wherein the means for rocking the arm is a linear reciprocating cylinder.