| 1/00 | Cylinders; Cylinder heads (in general F16J) |
| 1/02 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) |
| 1/04 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for air cooling |
| 1/06 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for air cooling Shape or arrangement of cooling fins; Finned cylinders |
| 1/08 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for air cooling Shape or arrangement of cooling fins; Finned cylinders running-liner and cooling-part of cylinder being different parts or of different material |
| 1/10 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for liquid cooling |
| 1/12 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for liquid cooling Preventing corrosion of liquid-swept surfaces |
| 1/14 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for liquid cooling Cylinders with means for directing, guiding, or distributing liquid stream |
| 1/16 | Cylinders; Cylinder heads (in general F16J) having cooling means (cylinder heads F02F 1/26) for liquid cooling Cylinder liners of wet type |
| 1/18 | Cylinders; Cylinder heads (in general F16J) Other cylinders |
| 1/20 | Cylinders; Cylinder heads (in general F16J) Other cylinders characterised by constructional features providing for lubrication |
| 1/22 | Cylinders; Cylinder heads (in general F16J) Other cylinders characterised by having ports in cylinder wall for scavenging or charging |
| 1/24 | Cylinders; Cylinder heads (in general F16J) Cylinder heads |
| 1/26 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means |
| 1/28 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means for air cooling |
| 1/30 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means for air cooling Finned cylinder heads |
| 1/32 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means for air cooling Finned cylinder heads the cylinder heads being of overhead-valve type |
| 1/34 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means for air cooling Finned cylinder heads with means for directing or distributing cooling medium (F02F 1/32 takes precedence) |
| 1/36 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means for liquid cooling |
| 1/38 | Cylinders; Cylinder heads (in general F16J) Cylinder heads having cooling means for liquid cooling the cylinder heads being of overhead-valve type |