Spray pump assembly
US4050860A · kind A · utility
18Cited by
3References
1Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1976 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Jun 1, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1023
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A finger-operated spray pump assembly adapted to maintain a seal against leakage under substantially all conditions normally encountered by the pump. The assembly includes a compression chamber, a piston slidable in the housing, a grommet for holding the piston in the compression chamber, a stem slidable in the piston, and a seal member abutting the piston. The lower end of the valve stem contacts the seal member to open the seal slightly before the piston starts its downstroke. A closure member for the container to be used is permanently attached to the spray pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.