>>2949876
In a regular valve, the stopper is held in place by the air pressure and a return spring. When the stopper is depressed via the pin, air pressure slips around the stopper and flows out through the transfer port.

In this design, the high pressure air is kept off of the back of the stopper by a separate chamber. The stopper has a hole drilled through the back and is vented through the transfer port, so the only force normally holding the stopper closed is the return spring. When the stopper's pin is depressed, high pressure air flows out through the transfer port and also through the hole in the pin, flowing backwards into the second chamber and pushing the valve back closed. The goal is to have the valve be very easy to open (like the valve on an unpressurized tank), but to close again very quickly under the force of the pressurized air as it is released.

This image is simplified a bit, but I hope it illustrates the concept. I don't have a prototype yet.