US 12,441,446 B2
Lightweight, adjustable buoyancy SCUBA unit
Aviad Cahana, Kula, HI (US)
Filed by Aviad Cahana, Kula, HI (US)
Filed on Oct. 21, 2022, as Appl. No. 17/971,232.
Application 17/971,232 is a continuation in part of application No. 16/097,836, granted, now 11,541,975, previously published as PCT/US2017/034896, filed on May 28, 2017.
Claims priority of provisional application 62/354,342, filed on Jun. 24, 2016.
Prior Publication US 2023/0060077 A1, Feb. 23, 2023
Int. Cl. B63C 11/00 (2006.01); B63C 11/22 (2006.01); B63C 11/02 (2006.01)
CPC B63C 11/2245 (2013.01) [B63C 2011/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A self-contained breathing apparatus incorporating an adjustable buoyancy system, configured for use with breathing gas while a user is submerged in a fluid, comprising: a vessel comprising an outer shell defining an interior volume; a dynamic partitioning element mounted within the interior volume separating the interior volume into a breathing gas portion configured to supply breathing gas to the user, and a fluid portion; a pump in fluid communication with the fluid portion of the vessel and having an inlet configured to accept fluid from water surrounding the user, configured to communicate fluid from the inlet into the fluid portion when the pump is active; a purge valve in fluid communication with the fluid portion of the vessel and with fluid surrounding the user, and configured to communicate fluid from the fluid portion to fluid surrounding the user when the purge valve is open.