Question: 

Why won't the jaws on my Companion open when I pull the handle to the open position?

Answer: 

All of B&W's 5th wheel hitches utilize a cam action release for the jaws.  When the latch handle is secured in the closed position, the jaws will stay locked around the kingpin of your trailer for towing. When the latch handle is moved to the open position, the tension on the jaws is released, even though they may not visibly pop open. If your truck and trailer are on uneven ground, there may be a slight bind between the jaws and trailer kingpin. This is normal. With the cam mechanism open, there is a nothing holding the jaws together. Ensure that the handle pin is in place, keeping the handle in the locked open position, then simply pull forward. The jaws will open and you'll be unhitched from your trailer.