Accession Number : ADD018167

Title :   Hydraulic Impulse Speargun.

Descriptive Note : Patent Application, Filed 17 Jun 96,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bissonnette, Laurent

PDF Url : ADD018167

Report Date : 17 Jun 1996

Pagination or Media Count : 16

Abstract : 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.

Descriptors :   *PATENT APPLICATIONS, *GUN BARRELS, *BREECH MECHANISMS, *HYDRAULICS, *UNDERWATER PROJECTILES, WATER, ELASTOMERS, PRESSURE, RELEASE, VALVES, PLUGS, CHAMBERS, GUN MUZZLES, BLADDERS

Subject Categories : Hydraulic and Pneumatic Equipment
      Guns

Distribution Statement : APPROVED FOR PUBLIC RELEASE