Hydraulic Impulse Speargun

摘要

A hydraulic speargun has an elongated elastomeric bladder for charging the gun.One end of the bladder selectively communicates with the breech chamber at the end of the gun barrel. The other end of the bladder is connected to a pump for inflating the bladder with water under pressure. A plug and dart assembly is breech loaded into the barrel. A trigger opens a valve to release the water pressure into the breech chamber. The pressure forces the spear ended dart portion of the plug and dart assembly to separate from the breech plug end and the dart portion is launched out the muzzle end of the barrel by the force of the water. A lanyard is attached between the breech plug end and the dart end and is coiled around the plug end. As the dart portion travels from the muzzle, the lanyard is deployed through the muzzle end of the barrel.