Buoyant force control apparatus for scuba diving

Claim 1

A buoyant force control apparatus for scuba diving, which comprises a wear having an inner air chamber, an air supply rubber tube, an upper opening of which tube being communicated with and secured to a half portion of the front face of said wear, an air supply valve inserted into and secured to a lower opening of said air supply rubber tube, said air supply valve having a valve shaft provided with a communication port communicated to an air breathe-in port, an air breathe-in tube passage and an air supply tube passage of said air supply rubber tube, an air supply valve situated at a position a little below the half portion of the front face of the wear, said air supply valve having an opening and closing means adapted to be opened and closed by a pushing manipulation and communicating with said air chamber and being secured there, a middle-pressure hose having an upper end connected to (an air supply tank) and a lower end connected to the air supply tube passage of said air supply valve and secured thereto, and a first and a second exhaust valves, respectively, having pull strings for opening and closing valves and grip balls, said first and the second exhaust valves being attached to around both shoulders of said wear so as to communicate with the air chamber and be secured there.