# US 7,461,624 B2 · Compensating shaft drive

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,461,624 B2
- Document ID: US7461624B2
- Status: Granted
- Kind: B2
- Application number: 11/572,031
- Filed: 2005-06-25
- Published: 2008-02-21
- Granted: 2008-12-09
- Earliest claimed: 2004-07-14
- Assignees: Schaeffler KG
- Inventors: Thomas Ullein; Reinhard Koch
- Web page: https://patentgrep.com/patent/US7461624B2

## CPC

- F16F 15/264: {Rotating balancer shafts (F16F15/262 takes precedence)}
- F16H 7/06: with chains
- F16H 35/02: for conveying rotary motion with cyclically varying velocity ratio
- F16H 2035/003: {Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears}
- Y10T 74/2183: Counterbalanced
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16H: GEARING
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A compensating drive for driving a compensating shaft of an internal combustion engine, comprising a toothed belt or a chain, which connects a crankshaft driven wheel of the internal combustion engine to a drive wheel on the compensating shaft or shafts, in which case the crankshaft driven wheel (2, 2′) and/or the drive wheel or wheels (5) of the compensating shafts (4) are shaped to be non-circular in such a way that they transmit to the drive a variability, which at least partially compensates the vibrations produced during the rotation of the crankshaft (1).

## Claims

### Claim 1

A compensating drive for driving a compensating shaft of an internal combustion engine, comprising a toothed belt or a chain, which connects a crankshaft driven wheel of the internal combustion engine to one or more drive wheels on the compensating shafts, wherein the crankshaft driven wheel and the drive wheel or wheels of the compensating shafts are shaped to be non-circular in such a way that they transmit to the drive a variability, which at least partially compensates the vibrations produced during the rotation of the crankshaft.

### Claim 2 (depends on 1)

The compensating drive as claimed in claim 1, wherein the driven wheel and the drive wheel or wheels are embodied so as to be oval.

### Claim 3 (depends on 1)

The compensating drive as claimed in claim 1, wherein the driven wheel and the drive wheel or wheels are embodied so as to be polygonal.