Manual precompression pump for the spraying of a liquid and a dispensing unit fitted with such a pump
US5641097A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jun 24, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0062
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A precompression pump for the spraying of a liquid includes a pumping chamber (2) containing a first piston (7) associated with a manipulating element (6), this piston bearing against a first spring (9). A precompression chamber (5) is provided with a second piston (10) bearing against a second spring (11), the precompression chamber communicating with the pumping chamber, their axes of symmetry being offset. A feeder duct (4) is provided with a valve (4a, 15) leading into the pumping chamber. A dispensing element (17) is provided with a nozzle (20) and with a dispensing duct (18) connecting the nozzle and the precompression chamber. The connection between the nozzle and the precompression chamber is interrupted in the rest position of the pump and is established under the action of the manipulating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.