05188398 is referenced by 44 patents and cites 18 patents.

A redundant locking fluid coupling has a first coupling element including a coupling nut and a second coupling element including an outer ring biased towards the sealing end, such as by a coil spring. The coupling nut and outer ring include circumferential ends that are engaged when the coupling nut is tightened on the second coupling element inner member. Rotation of the coupling nut in a loosening direction is prevented by ratcheting teeth, or, in an alternative embodiment, complimentary sawtooth teeth, in the circumferential surfaces of the coupling nut and outer ring. Loosening of the coupling nut may be accomplished by sides of a wrench engaging a wrench lead in chamfer forcing axial movement of the outer ring to disengage the ratcheting teeth, or in the alternative embodiment, loosening torque being sufficient to overcome the thread torque and the increased frictional force across the complementary sawtooth teeth.

Title
Redundantly locked fluid coupling
Application Number
7/815998
Publication Number
5188398
Application Date
January 2, 1992
Publication Date
February 23, 1993
Inventor
Christopher R Koss
West Chester
OH, US
Thomas N Parimore Jr
West Chester
OH, US
Agent
Jerome C Squillaro
David L Narciso
Assignee
General Electric Company
OH, US
IPC
F16L 35/00
View Original Source