Double inlet valve for enhanced pump efficiency
US11246457B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2019 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Nov 8, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67D3/0012
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A dispenser having a housing, a container disposed in the housing for holding a liquid, a nozzle, and a pump. The pump includes a pump inlet, a pump outlet, a pump chamber. 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. A first check valve is disposed between the container and the pump, and the first check valve has a first cracking pressure. A 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.