# US 4,392,846 A · Centrifuge apparatus

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- Number: US 4,392,846 A
- Document ID: US4392846A
- Status: Granted
- Kind: A
- Application number: 06/264,389
- Filed: 1981-05-18
- Granted: 1983-07-12
- Earliest claimed: 1981-05-18
- Assignees: Joy Manufacturing Company
- Inventors: John Novoselac; Dale L. Churcher
- Web page: https://patentgrep.com/patent/US4392846A

## CPC

- B04B 1/14: with periodical discharge
- B04B: CENTRIFUGES (high-speed drum mills B02C19/11; domestic spin driers D06F; analysing, measuring or monitoring physical or chemical properties of samples during centrifuging, see the relevant subclasses for these procedures, e.g. G01N)

## Abstract

A centrifuge apparatus having an external movable member to close the outer end of a fixed width peripheral discharge opening which may be partially deformable to effect such closing.

## Claims

### Claim 1

A centrifuge comprising:
an elongated shaft member rotatable about the longitudinal central axis thereof;
a bowl member having formed sections rigidly secured to axially spaced portions of said shaft member, respectively,
said formed sections extending radially outwardly of and circumferentially encompassing said central axis to form a chamber in conjunction with said shaft member,
said formed sections having a discharge opening of a fixed axial configuration between radially outer peripheral portions of said formed sections for discharging a centrifuged material,
means for introducing a slurry into said bowl member,
said bowl member having means for discharging an effluent constituent of said slurry,
a ring structure encompassing the radially outermost extent of said peripheral portions at least a portion of which includes a resilient member forming one side of the material flow path from said discharge opening,
actuator means having relatively movable parts with one of said parts being secured to one of said formed sections and the other of said parts being cooperable with the resilient portion of said ring structure to displace at least a portion of said ring structure with respect to said radially outermost extent, and
said actuator means being selectively and independently operable to move said other of said parts and displace at least said portion of said ring structure to selectively and independently open and close said discharge opening.

### Claim 2 (depends on 1)

A centrifuge as set forth in claim 1 wherein said actuator means includes means for normally biasing said other of said parts to maintain said discharge opening in an open condition.

### Claim 3 (depends on 1)

A centrifuge as set forth in claim 1 wherein said ring structure is bodily movable.

### Claim 4 (depends on 1)

A centrifuge as set forth in claim 1 wherein at least one of said radially outermost extends of said peripheral portions is a cylindrical surface with the central axis thereof coincident with said axis and said ring structure has a radially inwardly facing surface slidably engageable with said cylindrical surface.

### Claim 5 (depends on 4)

A centrifuge as set forth in claim 4 wherein the other of said radially outermost peripheral portions has a radially outwardly extending portion, and said ring structure having a free end engageable with said extending portion to close said discharge opening.

### Claim 6 (depends on 1)

A centrifuge as set forth in claim 1 wherein said actuator means and said ring structure are external of said bowl member.

### Claim 7 (depends on 1)

A centrifuge as set forth in claim 1 wherein each of said radially outermost extents is a cylindrical surface with the central axis thereof being coincident with said axis and said ring structure has a radially inwardly facing surface slidably engageable with said cylindrical surface.