Short-range lifebuoy launcher

Abstract

A short-range life saving device is provided. After removing a safety pin and throwing a housing, a wound portion of a line unwinds, a spring loaded sliding disc pushes down a first needle until being stopped, the first needle punctures an auxiliary air canister to release compressed air, the compressed air enters a receptacle, the compressed air flows out of the receptacle into a first portion of a second cylinder via an axial hole, a second needle is pushed down when the pressure reaches a predetermined value, the second needle punctures a main air canister to release compressed air prior to entering a second portion of the second cylinder, the compressed air flows out of the second portion of the second cylinder into the first cylinder, the compressed air flows into a lifebuoy for inflation via a tube, and the inflated lifebuoy separates the housing into two halves.

What is claimed is:  
     
         1 . A life saving device comprising:
 a housing consisting of at least two detachable pieces and comprising a neck having an opening;   a cylindrical cap assembly comprising an annular groove on an outer surface, a hollow extension, a stop member secured to an opening of the extension, a transverse hole through the extension, a safety pin inserted through the transverse hole, and a spring biased sliding disc having one end secured to the stop member and an other end urging against the safety pin;   a first needle moveably disposed in the cap assembly and comprising an annular first flange proximate to the safety pin;   a buoyant assembly disposed in the housing and comprising a hollow first cylinder having a top secured to the opening of the neck and including an inflatable lifebuoy disposed around the first cylinder;   a tube being in fluid communication with both the first cylinder and the lifebuoy;   a delay mechanism comprising a receptacle, an annular second flange on a bottom of the receptacle, an axial hole through a center of the second flange, and an auxiliary air canister disposed in the receptacle and being in close proximity to the first needle, a hollow second cylinder having one end secured to the second flange and an opening on an other end, a disc affixed to an inner surface of the second cylinder to divide the second cylinder into a first portion defined between the disc and the second flange and a second portion defined between the disc and the main air canister, the disc having a central hole, and a main air canister disposed in the second cylinder spaced from the disc and having a bottom engaged with the opening of the second cylinder;   a second needle spaced from the receptacle and moveably disposed through the central hole of the disc, the second needle being in close proximity to the main air canister; and   a line having one fastened end and an other end wound on the annular groove, the line comprising an extension tied to the safety pin;   wherein in response to a removal of the safety pin and a throwing of the housing, a portion of the line wound on the annular groove unwinds, the sliding disc pushes down the first needle until the first flange engages the extension, the first needle punctures the auxiliary air canister to release compressed air from the auxiliary air canister, the compressed air enters the receptacle, the compressed air flows out of the receptacle into the first portion of the second cylinder via the axial hole, pressure in the first portion of the second cylinder increases constantly, the second needle is pushed down when the pressure reaches a predetermined value, the second needle punctures the main air canister to release compressed air from the main air canister prior to entering a second portion of the second cylinder, the compressed air flows out of the second portion of the second cylinder into the first cylinder via the opening of the second cylinder, pressure in the first cylinder increases constantly, the compressed air flows into the lifebuoy for inflation via the tube, and the inflated lifebuoy separates the housing into the at least two pieces.