Idea for a pneumatic gun

[tromic]

It would be better:

 

[tromic]

Something like this might be better, safer...

Would it be possible to make it without spring?

 

[tromic]

For this design to work must be d > 0,707 D.
Then the force holding yellow and orange part together is greater than the force than try to separate them.

 

[tromic]

Nicer:

 

[tromic]

Maybe better...
Spring might be shorter, just for the ball, for the inlet valve. However, as on image, helps in moving "green part" and piston in locking position.

 

[tromic]

Same idea as above, but different solution and much more simple and reliable design.

 

[tromic]

To be more clear...

 

[tromic]

Step by step:

 

[tromic]

Forces just before latching:

 

[tromic]

Using safety switch there are some other possibilities too.
1. Activating Trigger valve gun would shot on low power. How strong, depends on the size of the hole.
2. During loading incremental loading would be possible.
3. Gun could be pressurised this way too, similar to method used in Zelinka.

 

[tromic]

More simple solution:

 

[tromic]

 

[tromic]

Little different:

 

[tromic]

Inverted logic, more simple!

 

[tromic]

Inverted logic, more simple!

More simplified:

 

[tromic]

An interesting working design of "Vektor" speargun:



http://garpun.spb.ru/forum/viewtopic.php?t=414&postdays=0&postorder=asc&start=420

 

[tromic]

Automatic operation:

 

[tromic]

A new idea. (Some corrections are still necessary)

 

[tromic]

This would be much better!

 

[Kars]

Interesting to watch your designs and development!

Forgive me for asking, but what design features do you want in your design?

How do you load the gun? How much force do you need?