Dispenser
US4438871A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | May 26, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/025
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispenser for pasty substances and/or liquids has two coaxially arranged metering pistons 11,24 which supply charges of material from two coaxially arranged pump chambers 14,23 through ejection channels 19,26 into an ejection chamber 20. The material can emerge from ejection chamber 20 through an outlet 4. This outlet 4 is controlled by means of plug 21 biassed in closing direction. When the metering pistons 11,24 are on their suction strokes material passes from the supply tanks 17,27 which are likewise arranged coaxially one inside the other. Such a configuration yields a dispenser which consists in essence of two separate dispensers, one inside the other. The two streams of material combine directly ahead of the outlet 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.