Fluid dispensing pump having bacteriostatic substance in pushbutton
US5950877A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Apr 22, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61J1/1443
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device for dispensing a fluid and operating without air intake, the device comprising a pump (1) mounted on a receptacle (3) containing the fluid, and a pushbutton (10) for actuating said pump, said pushbutton (10) including a fluid dispensing orifice (17), a substance having bacteriostatic activity on said fluid when it comes into contact with said substance being disposed in said dispenser device, the device being characterized in that said pushbutton (10) includes a nozzle (11) defining an expulsion channel (13) that is narrow and of small volume between the pump (1) and the dispensing orifice (17), said substance having bacteriostatic activity being disposed solely in said pushbutton (10) on or in the vicinity of said nozzle (11) such that said substance having bacteriostatic activity is of maximum effectiveness because of the small dead volume in the pushbutton.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.