Underwater diving system
US4237917A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1977 |
| Grant date | Dec 9, 1980 |
| Priority date | — |
| Expiry date | Nov 2, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87917
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The disclosure of this specification illustrates and teaches the use of a self contained breathing apparatus for attachment to a user's back and incorporates a plurality of tanks having a manifold between them that is common to all with a single filling block leading thereto, and a reserve system mounted at one end thereof. The reserve system comprises a poppet valve which signals a loss in pressure by closing, after which it can then be actuated to open it for supplying the remaining portion of the reserve breathing gas through the manifold. The system also has a first and second stage regulator to provide regulated breathing gas to a user. The first stage regulator incorporates a dynamically balanced piston which is supported by an O Ring or torroidal member that is deformed through its cross section to provide movement to the valving piston. The O Ring is eliptical through its cross section. First stage regulation is caused by the deformation of the eliptical cross sectioned O Ring, rather than substantial sliding thereof. At the same time the O Ring is implaced in juxtaposition to a ledge and formed so that upon overpressurization of the intermediate pressure zone such as throu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.