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

Claim 0:
1. An assembly comprising a ferrule of a fluid line and a coupling nut, the ferrule defining a frustoconical face configured to abut a corresponding frustoconical face of a component of a hydraulic system, the coupling nut comprising:
a shank extending along a central axis and having 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;
a shoulder extending circumferentially around the central axis, the shoulder extending around the inner passage and extending radially inwardly beyond the threads;
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, and
having a cross-section in a plane normal to the central axis, the cross-section defining a plurality of symmetry planes containing the central axis, the torque-transmitting faces free of intersection with the plurality of symmetry planes,

wherein rotation of the coupling nut about the central axis induces a translation of the coupling nut about the central axis to deform the ferrule until the frustoconical faces mate with one another.