Liquid metering pump
US4236881A · kind A · utility
24Cited by
5References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 3, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | May 3, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/24
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A liquid metering pump has power-operated poppet valves in its intake and return conduits. The quantity of liquid discharged is controlled by a movable cam which determines how long the liquid return conduit is open. A switch operated by a portion of a pumping diaphragm prevents excess pressure from damaging the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.