Dispenser pumps
US6763978B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2003 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Nov 10, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1074
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A dispenser pump e.g. for toothpaste has a plunger (21) connected to a proximal end of an elongate flexible plastics strip (22) which is run slidably along a guide track built into the discharge nozzle (14) of the pump alongside the discharge channel (63). The distal end of the guide track defines a bend which opens through a lateral slot into the discharge channel (63) just inside its external opening. Action of the plunger causes the strip (22) to slide back and forth along the track and round the bend, so that the tip of the strip is moved out of the mouth of the nozzle during dispensing but returns to block it and cut away residual product when the plunger is released.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.