Patent ID: 11879523
Assignee: ROLLS-ROYCE DEUTSCHLAND LTD & CO KG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A journal pin for supporting a gear, the journal pin comprising:
a longitudinal axis and
an outer surface,
wherein the journal pin is arranged in the gear forming a converging gap and a diverging gap therebetween, wherein the journal pin has only one longitudinal groove or the plurality of longitudinal grooves along the outer surface thereof, and wherein the only one longitudinal groove or the plurality of longitudinal grooves is configured to guide oil along the outer surface when the oil is carried from the converging gap towards the diverging gap due to a rotary movement between the gear around the journal pin;
wherein the only one longitudinal groove or the plurality of longitudinal grooves extends only within a circumferential range of between 170° and 270° for the journal pin, where 0° is set at a position of a maximum gap between the gear and the journal pin.