초록 ▼

A gas control valve (802) has an inlet needle jet (812) and an outlet (816), the communication between which is controlled by a valve member (808) carried by a rod (807) connected to a diaphragm (804) which divides a chamber (806), open to ambient pressure, from a chamber (805) which has an inlet co

A gas control valve (802) has an inlet needle jet (812) and an outlet (816), the communication between which is controlled by a valve member (808) carried by a rod (807) connected to a diaphragm (804) which divides a chamber (806), open to ambient pressure, from a chamber (805) which has an inlet connected to a buoyancy chamber (100) of buoyancy apparatus in which the valve is incorporated. The inlet (816) is also connected to the buoyancy chamber (100). By the inclusion of an ascent sensing control valve (801) sensing to trigger a venting valve (106), the buoyancy control apparatus is capable of producing hovering in water.

대표청구항 ▼

Apparatus for producing hovering in water comprising a buoyancy chamber, first valve means for controlling a supply of gas to said buoyancy chamber, second valve means for controlling venting of gas from said chamber, said second valve means comprising a pneumatically actuable venting valve and a ga

Apparatus for producing hovering in water comprising a buoyancy chamber, first valve means for controlling a supply of gas to said buoyancy chamber, second valve means for controlling venting of gas from said chamber, said second valve means comprising a pneumatically actuable venting valve and a gas control valve for sensing the occurrence of a condition in which the gas pressure in said chamber exceeds ambient water pressure by a predetermined amount and for communicating gas from a supply of gas to said pneumatically actuable venting valve to open the venting valve to vent gas from said chamber whilst said condition persists, and means for sensing descent of the apparatus and for actuating said first valve means to release gas into said buoyancy chamber.