Inhalation devices
US3995625A · kind A · utility
13Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 15, 1974 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Oct 15, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/208
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for providing a gas-air mixture to a patient in response to suction applied by the patient, comprising means defining an air inlet, a backward-facing step, an air passage for directing air past said backward-facing step, a non-return valve for controlling flow of air from said inlet to said air passage and a gas passage communicating with said air passage through at least one orifice adjacent to said backward-facing step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.