Double inlet valve for enhanced pump efficiency
US11089913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2018 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Oct 31, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1069
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An dispenser includes a housing, a container disposed in the housing for holding a liquid, a nozzle, and a pump. The pump is disposed between the container and the nozzle. The pump includes a pump inlet, a pump outlet, a pump chamber, a first check valve, and a second check valve. The pump inlet is in fluid communication with the container and the pump chamber, and the pump outlet is in fluid communication with the pump chamber and the nozzle. The pump chamber is movable between an expanded position and a compressed position. The first check valve is disposed between the container and the pump, and the first check valve has a first cracking pressure. The second check valve is disposed between the first check valve and the pump, and the second check valve has a second cracking pressure. The first cracking pressure of the first check valve is greater than the second cracking pressure of the second check valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.