Pump dispenser having a locking system with detents
US5899363A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Dec 22, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/107
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Lotion pump has a stepped piston telescoping inside a stepped body to define a pumping chamber. The piston has in its wall inlet and discharge apertures, one above the other, to the pumping chamber. A stem integral with the actuator has a sealing head inside the piston which shuttles up and down between positions at which it covers one aperture or the other. Shuttling is implemented by lost-motion between the actuator spout/stem and piston. A spring urges the stem up at all times. The actuator can be turned to lock the head over the discharge aperture by nullifying the lost-motion. Further turning can lock the stem in lockdown position. One-directional turnback can liberate the head and unlock the lockdown. Detents control sequence of unlocking.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.