# US 2018/0320730 A1 · Connecting rod

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- Number: US 2018/0320730 A1
- Document ID: US20180320730A1
- Status: Published application
- Kind: A1
- Application number: 15/773,189
- Filed: 2016-11-07
- Published: 2018-11-08
- Earliest claimed: 2015-11-06
- Assignees: Ge Jenbacher GmbH & Co Og
- Applicants: GE Jenbacher GmbH & Co OG
- Inventors: Frederic BUSSIERES
- Web page: https://patentgrep.com/patent/US20180320730A1

## CPC

- F16C 7/023: {for piston engines, pumps or the like}
- F16C 9/04: Connecting-rod bearings; Attachments thereof
- F16C 2226/80: with splines, serrations or similar profiles to prevent movement between joined parts
- F16C 2240/40: Linear dimensions, e.g. length, radius, thickness, gap
- F16C 2360/22: Internal combustion engines
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A connecting rod is provided, which includes a rod shaft and a rod cap. The rod shaft and the rod cap can be releasably fastened through connecting means to form a connected state, and when the rod shaft and the rod cap are in the connected state, they form a rod eye configured to enclose a bore for mounting the connecting rod on a crank shaft. The rod shaft and the rod cap have contact surfaces at which they touch each other in the connected state. The contact surfaces have an interlocking section-wise serration, and the contact surfaces have an un-serrated section.

## Claims

### Claim 1

A connecting rod, comprising:
a rod shaft; and
a rod cap,
wherein the rod shaft and the rod cap are configured to be releasably fastened through connecting means to form a connected state, and when the rod shaft and the rod cap are in the connected state they form a rod eye configured to enclose a bore for mounting the connecting rod on a crank shaft;
wherein the rod shaft and the rod cap have contact surfaces at which they touch each other in the connected state; and
wherein the contact surfaces have an interlocking section-wise serration and the contact surfaces have an un-serrated section.

### Claim 2 (depends on 1)

The connecting rod according to claim 1, wherein the un-serrated section is formed at a section of the contact surfaces facing the bore, preferably being adjacent to the bore.

### Claim 3 (depends on 1)

The connecting rod according to claim 1, wherein the un-serrated section is substantially flat.

### Claim 4 (depends on 1)

The connecting rod according to claim 1, wherein the contact surfaces have at least one undercut at which the contact surfaces of the rod shaft and the rod cap do not touch each other.

### Claim 5 (depends on 4)

The connecting rod according to claim 4, wherein the undercut directly merges into the un-serrated section.

### Claim 6 (depends on 1)

The connecting rod according to claim 1, wherein the undercut is located more distant from the bore than the un-serrated section.

### Claim 7 (depends on 1)

The connecting rod according to claim 1, wherein the connecting means of the rod shaft and the rod cap are formed by screws, which can be led through screw bores, and wherein the undercut is located in the area of the at least one screw bore.

### Claim 8 (depends on 1)

The connecting rod according to claim 1, wherein the undercut exhibits a span width (p) of approximately half of the span width of the serration.