Double action trigger sprayer
US5711459A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 25, 1996 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Mar 25, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1009
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention is a continuous action trigger sprayer for spraying liquid material. It includes a main housing having connectors to a container and having an operation cylinder and a liquid chamber. It also includes a pumping element which is within the operation cylinder and has a valve seat, a one-way valve and a pumping rod, which permits liquid material to pass therethrough in a relative direction toward a spray nozzle, but not toward the liquid chamber. There is a relief valve having a seat with an opening therethrough and a relief passage to bleed liquid back to the container and which cooperates with the pumping element. There is also a trigger which moves the pumping element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.