Semi-closed circuit underwater breathing apparatus ratio regulator
US10274973B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2017 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Sep 7, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2564
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An apparatus for adjusting the partial pressure of gaseous mixtures comprises a housing and piston. The housing defines a chamber coupled to an oxygen metering orifice, diluent metering orifice, vent port and gas outlet. The oxygen metering orifice provides oxygen to the chamber and the diluent metering orifice provides diluent gas to the chamber. The piston is movably positioned in the chamber and includes first and second sealing devices. The chamber is sectioned into a mixing chamber, a diluent chamber and a reference chamber located between the mixing chamber and diluent chamber. The diluent chamber receives a diluent gas referenced at ambient pressure and the reference chamber is charged with a gas having a reference pressure. The piston changes positions within the chamber depending on a force balance created by a pressure differential between the reference pressure and ambient pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.