Patent ID: 8904940

Claim:
A grenade device for providing a delayed bang upon coupling to a pressurized canister containing gas, said device comprising: an annular housing having first and second axial ends and an internal cylindrical bulkhead disposed therebetween, said bulkhead having choke flow-through orifice; a puncture awl extending axially outward from said bulkhead at said second axial end; a sleeve removably connecting to said housing at said first axial end; a diaphragm disposed between said sleeve and said housing to form an annular chamber between said diaphragm and said bulkhead; a cap inserting into said housing at said second axial end, said cap receiving the canister that faces said awl; and a base removably connecting to said housing at said second axial end, wherein in response to axial compression of the canister towards the device: said awl punctures the canister to release the gas, the gas flows through said choke orifice to pressurize said chamber, and said diaphragm ruptures upon exceeding a pressure threshold in said chamber.