# US 8,146,727 B2 · Clutch for torque transmission between a shaft and a roller which is arranged coaxially around the shaft

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- Number: US 8,146,727 B2
- Document ID: US8146727B2
- Status: Granted
- Kind: B2
- Application number: 12/227,121
- Filed: 2007-05-31
- Published: 2009-08-20
- Granted: 2012-04-03
- Earliest claimed: 2006-06-01
- Assignees: Oerlikon Textile GmbH & Co. KG
- Inventors: Rainer Kotte; Ralf Kotte
- Web page: https://patentgrep.com/patent/US8146727B2

## CPC

- F16D 25/082: {the line of action of the fluid-actuated members co-inciding with the axis of rotation}
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

## Abstract

The present invention relates to a clutch (20) for torque transmission between a shaft (2) and a roller (30) which is arranged coaxially around the shaft (2), comprising pneumatically actuable means for selectively interrupting and/or producing a force flow between the shaft (2) and roller (30), wherein the clutch (20) is arranged within the roller (30) coaxially between the shaft (2) and roller (30).

## Claims

### Claim 1

Clutch (20) for transmitting torque between a shaft (2) and a roller (30) arranged coaxially around the shaft (2), comprising pneumatically actuatable means for selectively interrupting or producing a force flow between the shaft (2) and roller (30), characterized in that the clutch (20) is arranged inside the roller (30) coaxially between the shaft (2) and roller (30), and wherein the pneumatically actuatable means comprises a pneumatic cylinder (3) with a piston (11) movable therein, the pneumatic cylinder being rotatably mounted relative to the shaft (2) and the roller (30) with the piston (11) acting on a rotatably arranged clutch disc (8) non-rotationally connected to the shaft (2) or roller (30) for pressing said clutch disc, on actuation of the clutch, against a corresponding face (13) non-rotationally connected to the roller (30) or shaft (2), or alternatively for lifting said clutch disk from said corresponding face (13).

### Claim 2 (depends on 1)

Clutch according to claim 1, characterized in that the pneumatic cylinder (3) comprises a circular piston arranged coaxially between the shaft (2) and roller (30).

### Claim 3 (depends on 1, 2)

Clutch according to claim 1 or 2, characterized in that the pneumatic cylinder (3) comprises a restoring spring (12), which, upon an interruption of the compressed air supply, returns the piston (11) of the pneumatic cylinder (3) into a starting position.

### Claim 4 (depends on 1)

Clutch according to claim 1, characterized in that the pneumatically actuable means are operable only to alternatively interrupt or produce a force flow between the shaft (2) and the roller (30), and spring-loaded means are provided to act in opposition to the pneumatically actuable means.

### Claim 5 (depends on 4)

Clutch according to claim 4, characterized in that the spring-loaded means comprise a compression spring (9).

### Claim 6 (depends on 4, 5)

Clutch according to either of claim 4 or 5, characterized in that the piston (11) of the pneumatic cylinder (3), upon a supply of compressed air, lifts the clutch disc (8) from the corresponding face (13) against the spring loading, wherein the spring-loaded means (9) presses the clutch disc (8) against the corresponding face (13) when the supply of compressed air is interrupted.

### Claim 7 (depends on 1)

Clutch according to claim 1, characterized in that the clutch disc (8) is non-rotationally connected to the roller (30) and the corresponding face (13) is non-rotationally connected to the shaft.

### Claim 8 (depends on 7)

Clutch according to claim 7, characterized in that the non-rotational connection between the roller (30) and clutch disc (8) takes place by means of grooves (15) extending on the inside on the roller (30) parallel to the longitudinal axis thereof, and projections (14) arranged on the clutch disc (8) and engaging in the grooves (15).

### Claim 9 (depends on 7)

Clutch according to claim 7, characterized in that the non-rotational connection between the roller (30) and clutch disc (8) is formed by means of a carrier (10), which can be arranged in the roller and has grooves (15) extending parallel to the longitudinal axis of the roller (30), as well as projections (14) arranged on the clutch disc (8) and engaging in the grooves (15) of the carrier.

### Claim 10 (depends on 1)

Clutch according to claim 1, characterized in that the corresponding face comprises a face (13) extending normally to the longitudinal axis of the shaft (2) of a hub (1) arranged on the inside in the roller (30) and non-rotationally connected to the shaft (2).