Dispensing pump
US5509578A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 27, 1995 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | Mar 27, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0054
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pump (1) has a tubular inlet portion (4) which is arranged to penetrate the mouth (27) of a container having a seal (29) in order to dispense liquid from the container. The pump has a body (2) connected to a housing (23) comprising holding means (25) which holds the container such that in a first position the inlet portion of the pump is external to the seal and in a second position the inlet portion extends through the seal into a reservoir (30) to allow liquid to be dispensed. In the second position, the inlet portion projects into the reservoir to an extent sufficient to displace a volume of liquid filling the inlet channel (6) of the pump and occupying the pump chamber (3). The pump is thereby rendered self priming by the initial movement between the first and second positions which at the same time disrupts the seal. The pump is particularly useful for the nasal administration of liquid sprays from an ampule having an elastomeric seal closure or a duck bill valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.