Manually actuated dispensing pump
US4747523A · kind A · utility
40Cited by
13References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 19, 1987 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Jun 19, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1061
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A manually actuated dispensing pump having a pump body extending transversely above a closure cap adapted for mounting the body at the upper end of a container, has an outwardly open pump cylinder for the reception of a reciprocable piston having spaced piston seals. To facilitate pump priming, the inboard seal is positioned relative to the inlet port so that the inboard seal overlies the inlet port at a predetermined position during the inward pressure stroke of the piston to permit flow of entrapped air from the pump chamber outwardly of the pump cylinder via the annular chamber defined between the piston seals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.