Patent ID: 11859738
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. A hydraulic system, comprising:
a fluid line coupled to a ferrule, the ferrule defining a first frustoconical face; and
a coupling nut sealingly engaging the ferrule to a component of the hydraulic system, the component defining a second frustoconical face, rotation of the coupling nut about a central axis induces a translation of the coupling nut about the central axis to deform the ferrule until the first frustoconical face mates with the second frustoconical face, the coupling nut having:
a shank extending along the central axis and defining threads to threadably engage corresponding threads of the component, the threads extending circumferentially around the central axis, the shank defining an inner passage extending along the central axis and sized to receive the fluid line; and
a head extending from the shank circumferentially around the inner passage relative to the central axis, the head and the shank being two parts of a single body, the head:
defining faces circumferentially distributed about the central axis and edges at junctions between the faces, the faces including torque-transmitting faces each facing a direction having a circumferential component relative to the central axis,
the edges including a first subset of the edges and a second subset of the edges, the edges of the first subset located radially outwardly of the edges of the second subset, all of the torque-transmitting faces contained radially between the edges of the first subset and the edges of the second subset.