Anti-clog pump sprayer
US6257451A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2000 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Jun 1, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A manually actuated pump sprayer has a cover on the plunger head which is shifted relative thereto, the cover having an opening for exposing the discharge orifice when relatively shifted. In a non-use condition a portion of the cover side wall fluid tightly seals the orifice closed by engaging a circular seal bead provided on the outer face of the orifice cup concentric with the orifice. The outer face of the orifice cup may be textured to increase the hang time of any residual liquid product at that area which is likewise prevented from drying to avoid clogging by the sealed condition presented between the cover and the circular seal bead in the non-use position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.