Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 71 users online :: 3 registered, 1 hidden and 67 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Improved Semi-Auto Shell Gun -From_Hamsterdam

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
Sponsored 
  • Author
    Message

Improved Semi-Auto Shell Gun -From_Hamsterdam

Unread postAuthor: From_Hamsterdam » Fri Oct 05, 2007 9:51 pm

Edit: Any help on naming this would be greatly appreciated.

i haven't posted in a while as i have just started working full time.

Patent Pending.

i have upgraded my old gun, it now has about 300% improved air flow
old gun: http://www.spudfiles.com/forums/semi-completed-semi-auto-shell-gun-t8892.html

i did this by removing the bolt plug (purple thingy in the diagrams on above link) and adding a small homemade pneumatic ram that is connected to the firing chamber. So when it is pressurized the bolt moves forward when the pressure is released by firing the bolt is pulled back.

i have successively fired this in semi auto.
it has a very loud hissing sound due to the poor seal in the ram and a loud bang with each shot, so i cant really use it at home. it has a slow fire rate about 1 shot every 3 seconds but i should improve this by adding a smaller firing chamber and weaker spring inside the ram. my ammo is 15mm wood dowels, amazing fit inside the condute.

You can use this design as long as you do not sell guns or clame this design as your own.


sorry about the bad quality pics

Image
long trigger hose leading to sprinkler valve for safety. other long hose connects to the scuba tank. short hose leads from firing chamber to back of ram.

Image
this is the ram that screw holds the front end cap on it.

Image
how the shells sit inside the mag

Image
this is the connection for a BCD which connects to an scuba tanks. puts out about 120 psi.

Image
forward view of ram and blot

crappy video
http://s214.photobucket.com/albums/cc82 ... Video2.flv
you can kinda see the shells ejecting
  • 0

Quote:"What if the Kangaroo's where explosives?"

From_Hamsterdam
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Thu Feb 15, 2007 8:26 pm
Reputation: 0

Unread postAuthor: iPaintball » Sat Oct 06, 2007 11:00 am

Sweet idea, but I dont think it was worth the money to try and patent it.
  • 0

Summer Projects:
CO2 tank hybrid: Gotta fix the meter :(
Cane gun: Needs a pilot/fill setup
1.5" piston valve gun: Almost done
User avatar
iPaintball
Colonel
Colonel
 
Posts: 695
Joined: Sun Mar 04, 2007 8:37 pm
Reputation: 0

Unread postAuthor: CannonCreator » Sat Oct 06, 2007 12:20 pm

Wait did you seriously try to patent it?

and is patenting things free? or do you have to pay for them to be patend?
  • 0

Spudding Is dangerous, I learned the hard way:
http://www.spudfiles.com/forums/my-eye- ... 15301.html

Guns. As They may Claim lives, they are lives. Our lives.

When Life gives you lemons, through them at somone.

Live, Breathe, Eat, Paintball
User avatar
CannonCreator
Captain
Captain
 
Posts: 314
Joined: Sun Aug 12, 2007 12:59 pm
Location: Moorpark, CA
Reputation: 0

Unread postAuthor: benstern » Sat Oct 06, 2007 12:25 pm

Patenting is $360 it is not cheap by any means.

http://www.uspto.gov/web/offices/ac/qs/ ... mber30.htm
  • 0

User avatar
benstern
Donating Member
Donating Member
 
Posts: 909
Joined: Wed Sep 21, 2005 8:24 pm
Reputation: 0

Unread postAuthor: Tom » Sat Oct 06, 2007 12:29 pm

It looks like a good idea, did you tried to patent the whole gun ore only the semi-automatic shell loading.
GR.Tom
  • 0

Really really proud member of the Dutch Spud Clan!

Tom
Sergeant Major
Sergeant Major
 
Posts: 187
Joined: Fri Aug 24, 2007 8:22 am
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sat Oct 06, 2007 12:48 pm

With "real action" shell ejecting semi/full auto paintball guns on the market, I doubt it's worth the hassle of patenting.

[youtube]http://youtube.com/watch?v=tT0kRaRXvlM&mode=related&search=[quote][/quote][/youtube]
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: ALIHISGREAT » Sat Oct 06, 2007 1:13 pm

dude that is cool!!!
  • 0

User avatar
ALIHISGREAT
Major General
Major General
 
Posts: 1779
Joined: Sat Aug 25, 2007 6:47 pm
Location: UK
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: From_Hamsterdam » Sat Oct 06, 2007 8:33 pm

i haven't patented it yet and most likely wont i just did not what any one else doing it.

i know there are already paint ball guns that use shells out there, but this design would be cheaper to construct due to the simplicity of the ejection/loading system.
  • 0

Quote:"What if the Kangaroo's where explosives?"

From_Hamsterdam
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Thu Feb 15, 2007 8:26 pm
Reputation: 0

Unread postAuthor: Modderxtrordanare » Sat Oct 06, 2007 9:25 pm

From_Hamsterdam wrote:i haven't patented it yet and most likely wont i just did not what any one else doing it


What's wrong with someone else wanting to try it as well? That's what helps us advance our hobby, sharing ideas and seeing if someone else can reproduce a good idea, and then improve on it somehow.
  • 0

Spudding since '05. Proud waster of plumbing and plumbing accessories.

-Wiki
-How-To: Modding a Sprinkler Valve
User avatar
Modderxtrordanare
Donating Member
Donating Member
 
Posts: 686
Joined: Mon Nov 20, 2006 1:22 pm
Location: Texas
Reputation: 0

Unread postAuthor: grumpy » Sat Oct 06, 2007 9:41 pm

it's even been done in a bigger version.
http://www.youtube.com/watch?v=EKHYS8DnPzE
  • 0


grumpy
Captain
Captain
 
Posts: 331
Joined: Wed Sep 26, 2007 7:48 am
Location: tampa,fla.
Reputation: 0

Unread postAuthor: From_Hamsterdam » Sun Oct 07, 2007 12:41 am

What's wrong with someone else wanting to try it as well? That's what helps us advance our hobby, sharing ideas and seeing if someone else can reproduce a good idea, and then improve on it somehow.

i do want other people to try it i just don't want them to patent this design. Sorry if that came across wrong.

it's even been done in a bigger version.

that is awesome. if they used my design they could remove the ejectors and have the used shells fall straight down. well i have my next project :D i wonder where they got those pneumatic rams?

i do want as many people to do this a possible! go do it now! NOW! HAHAHAHAH :twisted:

Any one seen my marbles? i lost them.
  • 0

Quote:"What if the Kangaroo's where explosives?"

From_Hamsterdam
Staff Sergeant
Staff Sergeant
 
Posts: 110
Joined: Thu Feb 15, 2007 8:26 pm
Reputation: 0

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Yahoo [Bot]

Reputation System ©'