Tube coupling locking device

摘要

The tube coupling assembly comprises first and second coupling body sections having cylindrical end portions joined by axially interconnected male and female threads and each body section having wrench flats formed in parallel pairs on opposite sides of the respective body section. It also has a releasable locking clamp to prevent undesired unthreading of the connected first and second body sections. The locking clamp includes a first clamp member having a first end with spaced parallel rigid arms engaged with the wrench flats on opposite sides of the first body section and a second end of the first clamp having a rigid concave configuration engaged about the second coupling body section. A second clamp member with a clamping surface of concave configuration is engaged about the second coupling body section in opposed relationship to the second end of the first clamp member and joined to it by connecting device to clamp the locking clamp to the second body section.