Pump for dispensing a fluid
US12194483B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 2021 |
| Grant date | Jan 14, 2025 |
| Priority date | — |
| Expiry date | Jan 8, 2042 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/14
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pump for dispensing a fluid, has a pump head, a piston body with a piston, a pump chamber limited by a pump chamber body, an inlet valve and an outlet valve, the piston being moveable by respective movement of the pump head between an upper starting position and a lower end position. A return stroke force for a return stroke from the lower end position into the upper starting position is provided by a bellows, formed by two bellows arranged one above the other, Each of the bellows is folded up, when moving the pump head into the lower end position, by exerting a compression force on the pump head, the first bellows receiving the compression force by direct engagement with the pump head, the second bellows receiving the compression force only by engagement with the first bellows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.