Spray pump
US4941595A · kind A · utility
24Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1016
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A spray pump comprising a main cylinder and a secondary cylinder with a main piston and a secondary piston, first and second springs are provided for urging the pistons to particular positions. A fixed attachment between the main piston and the secondary cylinder and the latter forms a space with a closed bottom and an open upper end through which the interior of the main cylinder and the secondary cylinder are in communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.