Selective attachment device with multiple fluid sources for maintaining positive fluid pressure
US11318272B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2021 |
| Grant date | May 3, 2022 |
| Priority date | — |
| Expiry date | May 18, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/7545
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus such as a fluid mixer, suitable for use with a respirator, including a venturi nozzle for flow of a pressure-controlled fluid; an ambient fluid aperture in fluid communication with the venturi nozzle; a fluid port; a pressure force multiplier in fluid communication with the fluid port; and a valve moveable relative to the venturi nozzle between a start flow position and a stop flow position; where the pressure force multiplier is configured such that fluid forced into the fluid port actuates the valve relative to the venturi nozzle; and where the pressure force multiplier is configured such that fluid withdrawn from the fluid port actuates the valve relative to the venturi nozzle. An attachment device, connector, and method of using an apparatus suitable for a ventilator is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.