Breathing aid device
US5664562A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1995 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Mar 13, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0039
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A patient circuit (1) comprises an inspiratory branch (3) connected to an inspiratory flow rate source (11), and an expiratory branch (4) connected to the atmosphere through an expiratory valve (V.sub.E). An inspiratory valve (V.sub.I) is arranged between the inspiratory flow rate source (11) and the inspiratory branch (3). During inspiration, the inspiration valve (V.sub.I) is open and the pressure of the inspiratory flow source is applied to the expiration valve (V.sub.I) to close the latter. During expiration, the inspiration valve (V.sub.I) is closed, and the control inlet (6) for controlling the expiration valve (V.sub.I) is connected through a control valve (VC1) to a low pressure source (14) adjustable in a range including the zero value. The patient breathes as desired under atmospheric pressure or under positive expiratory pressure. Utilization for making a simple apparatus which provides for multiple adjustments, and compatible with its utilization at home.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.