# US 10,767,729 B2 · Chain composed of different pitch links with repeated sequence

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- Number: US 10,767,729 B2
- Document ID: US10767729B2
- Status: Granted
- Kind: B2
- Application number: 15/750,696
- Filed: 2015-09-16
- Published: 2018-08-23
- Granted: 2020-09-08
- Earliest claimed: 2015-09-16
- Assignees: GM Global Technology Operations LLC
- Applicants: GM Global Technology Operations LLC
- Inventors: Chengwu Duan; Chi-kuan Kao; Jian Yao
- Web page: https://patentgrep.com/patent/US10767729B2

## CPC

- F16G 5/18: in the form of links
- F16G 1/28: with a contact surface of special shape, e.g. toothed
- F16G 5/20: with a contact surface of special shape, e.g. toothed
- F16G 13/08: with links closely interposed on the joint pins (F16G13/04 takes precedence)
- F16H 9/24: using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing
- F16G 13/04: Toothed chains
- F16G 13/06: with links connected by parallel driving-pins with or without rollers {so-called open links}
- F16H 55/49: Features essential to V-belts pulleys
- F16H 55/52: Pulleys or friction discs of adjustable construction
- F16H 55/56: of which the bearing parts are relatively axially adjustable
- F16H 57/0006: {Vibration-damping or noise reducing means specially adapted for gearings (devices for varying tension of belts, ropes or chains with damping means F16H7/0829; toothed members with construction providing vibration damping F16H55/14; reducing vibrations or noise of the gearbox casing F16H57/028; suppression of vibrations or noise of gear selectors F16H59/0208; control of hydrostatic fluid gearing preventing or reducing vibrations or noise F16H61/4183)}
- F16G: BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16H: GEARING

## Abstract

A number of variations may include a product that may include a linking member that may have links arranged in rows that have multiple pitch lengths. Each of the rows may have at least one link. Each of the multiple pitch lengths may be a discrete length that may be different from others of the multiple pitch lengths. The rows may be arranged along the linking member in a repeating sequence of the multiple pitch lengths.

## Claims

### Claim 1

A product comprising a linking member having links arranged in rows, the rows connected together by pins defining multiple pitch lengths of the linking member, wherein each pitch length in the multiple pitch lengths is defined between an adjacent pair of the pins; and
a driving pulley assembly and a driven pulley assembly each rotatable on a pulley axle,
wherein the linking member connects the driving pulley assembly with the driven pulley assembly,
wherein the linking member includes teeth extending from the links inwardly toward the pulley axles, the teeth disposed at consistently spaced intervals along the linking member, wherein some of the teeth may each be aligned with one of the pins along the linking member,
wherein each of the rows has at least one link, the rows arranged along the linking member in a repeating sequence of the multiple pitch lengths, wherein each of the multiple pitch lengths is a discrete length that is different from at least some others of the multiple pitch lengths;
wherein all the links in each respective row are identical,
wherein the multiple pitch lengths include at least one of:
an “a” pitch length and a “b” pitch length, with the teeth separated from one another by a first distance equal to a sum of the “a” pitch length plus the “b” pitch length; or
the teeth separated from one another by a second distance equal to half of a sum of three of the “a” pitch length plus the “b” pitch length.

### Claim 2 (depends on 1)

The product according to claim 1 wherein at least one of the driving pulley assembly or the driven pulley assembly includes a row of teeth that selectively engage the teeth of the linking member providing positive meshing engagement there-between.

### Claim 3 (depends on 1)

The product according to claim 1, wherein the multiple pitch lengths include a “c” pitch length.

### Claim 4 (depends on 3)

The product according to claim 3 wherein the “b” pitch length is at least 1.2 times the “a” pitch length and the “c” pitch length is at least 1.2 times the “b” pitch length.

### Claim 5 (depends on 4)

The product according to claim 4 comprising a first link defining the “a” pitch length, a second link defining the “b” pitch length, and a third link defining the “c” pitch length, wherein the second link is longer than the first link and the third link is longer than the second link, wherein the “c” pitch length is at least 1.2 times the “b” pitch length.

### Claim 6 (depends on 1)

The product according to claim 1 wherein the linking member is a chain.

### Claim 7 (depends on 1)

The product according to claim 1 wherein the driving pulley assembly has a first pair of sheaves and the driven pulley assembly has a second pair of sheaves and wherein each of the rows has multiple links so that each row extends between and engages each sheave in the first and second pairs of sheaves.

### Claim 8

A product comprising a linking member that transfers torque and includes a number of links arranged in a series of rows, each row in the series of rows are pivotable relative to its adjacent rows, wherein each row establishes a respective pitch length and wherein the pitch lengths of the linking member include at least two different lengths, wherein the at least two different lengths comprise at least two of a short length, a medium length, and a long length, wherein the medium length is longer than the short length and the long length is longer than the medium length, the at least two of the short, medium and long lengths arranged along the linking member in a repeating sequence,
wherein the linking member includes teeth extending from the links, the teeth disposed at consistently spaced intervals along the linking member,
wherein the consistently spaced intervals comprise at least one of: a+b, 3α+b/2, and 2α+b+c/2, where “a” is equivalent to the short length, “b” is equivalent to the medium length, and “c” is equivalent to the long length.

### Claim 9 (depends on 8)

The product according to claim 8 further comprising a driving pulley assembly and a driven pulley assembly each rotatable on a pulley axle, wherein the linking member connects the driving pulley assembly with the driven pulley assembly, wherein the teeth extend from the links inwardly toward the pulley axles.

### Claim 10 (depends on 9)

The product according to claim 9 further comprising pins connecting each adjacent row of the links, wherein at least some of the teeth are each aligned with one of the pins along the linking member.

### Claim 11 (depends on 10)

The product according to claim 10 wherein at least some of the teeth are disposed between a pair of the pins along the linking member and part-way along a link connecting the pair.

### Claim 12 (depends on 8)

The product according to claim 8 further comprising a driving pulley assembly and a driven pulley assembly wherein the linking member connects the driving pulley assembly with the driven pulley assembly.

### Claim 13 (depends on 12)

The product according to claim 12 wherein at least one of the driving pulley assembly or the driven pulley assembly includes a row of teeth that selectively engage the teeth of the linking member providing positive meshing engagement there-between.

### Claim 14 (depends on 8)

The product according to claim 8 further comprising a driving pulley assembly and a driven pulley assembly, wherein the driving pulley assembly has a first pair of sheaves and the driven pulley assembly has a second pair of sheaves and wherein each of the rows has multiple links so that the rows extend between and engage each sheave in the first and second pairs of sheaves.

### Claim 15

A product comprising a driving pulley assembly, a driven pulley assembly each rotatable on a pulley axle, and a chain that engages both the driving pulley assembly and the driven pulley assembly and transfers torque there-between, and includes a number of links arranged in a series of rows, each row in the series of rows pivotable relative to its adjacent rows, wherein each row establishes a respective pitch length and wherein the pitch lengths of the chain include multiple pitch lengths arranged along the chain in a repeating sequence, wherein the links include teeth extending inward toward pulley axles of the driving and driven pulley assemblies, the teeth disposed at consistently spaced intervals along the chain, wherein the multiple pitch lengths comprise an “a” pitch length, a “b” pitch length, and a “c” pitch length, and wherein the teeth are separated from one another by a distance equal to half of a sum of two of the “a” pitch length plus the “b” pitch length plus the “c” pitch length.

### Claim 16 (depends on 15)

The product according to claim 15 comprising a first link defining the “a” pitch length, a second link defining the “b” pitch length, and a third link defining the “c” pitch length, wherein the second link is longer than the first link and the third link is longer than the second link, the “a” pitch length, the “b” pitch length, and the “c” pitch length are arranged along the chain in a repeating sequence.