Posted: Tue Jun 10, 2008 1:54 pm
The O-ring ( blue dots on my drawing ) is making an airtight seal with the inner tube whilst in initial position.
When the trigger is pulled, it moves back into the larger diameter pipe and looses its seal.
The middle O-ring does the same thing but the other way around.
The third O-ring is only there to equalise forces at high pressures.
When the trigger is pulled, it moves back into the larger diameter pipe and looses its seal.
The middle O-ring does the same thing but the other way around.
The third O-ring is only there to equalise forces at high pressures.