Spraying device
US4047642A · kind A · utility
Inventor
Key dates
| Filing date | Mar 21, 1974 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Mar 21, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M11/00
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A spraying device comprises an outer compressible container and an inner compressible container. The outer container the interior of which having no communication with the surrounding atmosphere contains a preferably liquid active substance whereas the inner container initially contains air. The inner container communicates with the atmosphere via a narrow channel whereas the inner container is made permeable such that active substance may reach the inner container in small quantities. Squeezing of the outer container will thus generate a spray comprising air and active substance. The device may further have openings to enable air to be suck into the inner container after each use of the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.