Pumping system
US4184331A · kind A · utility
10Cited by
2References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1978 |
| Grant date | Jan 22, 1980 |
| Priority date | — |
| Expiry date | Feb 27, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/6355
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pumping system for pumping liquid clay or slip into a filter press comprises a hydraulically-powered double-acting ram for pumping the slip and a hydraulic control circuit for the ram. The control circuit includes a pair of hydraulic pumps one of which provides a high pressure, low volume delivery and the other of which provides a low pressure high volume delivery, and valves controlling the supply of oil from these pumps to the ram according to the resistance encountered by the ram.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.