Liquid dispenser nozzle assembly
US5025957A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Sep 11, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/302
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A liquid dispensing nozzle assembly is provided for mounting on a liquid container and dispenser having a flexible wall and liquid storage cavity for manually squeezed dispensing of a liquid from the cavity through the nozzle assembly. The nozzle assembly maintains the liquid, such as contact lens saline solution, in sterile condition during storage and repeated dispensing of the liquid from the container cavity. The nozzle assembly includes a liquid conduit for communication from the container cavity to a liquid discharge port from the nozzle assembly to enable dispensing of the liquid displaced by manually squeezing the flexible wall of the container. The nozzle assembly also includes an air aspiration conduit separate from the liquid conduit for aspirating air into the container cavity to replace the dispensed liquid. The nozzle assembly includes a partitioned diaphragm including separate portions respectively included in the liquid conduit and the air aspiration conduit. The air conduit portion of the diaphragm can include a filter which is hydrophobic and air permeable but impermeable to bacteria to prevent entrainment of bacteria with the aspirating flow of air into the liqui…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.