US Patent 7585001 Quick-disconnect latch for fluid conduits

A quick disconnect latching device for use in a liquid conduit coupling has two halves: a pin half and a release half. The pin half includes a casing sleeve into which a latch pin is slidably retained. The latch pin is spring biased into a retracted position within the sleeve. Latch pin dogs are located at the ends of arms extending from the latch pin to interact with a catch within the release half. A hollow nose casing is tapered to cam the arms inward when a sufficient separating axial force is applied to one or both of the pin half and the release half, so that the latch pin dogs release the catch. The amount of force required to separate the latch halves can be adjusted by varying the spring bias using an adjustment screw.