System for pumping fluids at constant pressure
US4373864A · kind A · utility
10Cited by
12References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1980 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Mar 6, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/08
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A constant pressure system for pumping a coal slurry includes a slurry pump mechanically driven by a hydraulic motor which, in turn, is driven by a hydraulic pump. The output of the hydraulic pump is controlled by a pressure sensitive flow control valve that maintains the hydraulic fluid pressure drop as a constant across the hydraulic motor. The system assures a constant hydraulic motor output torque, driving the slurry pump at a constant delivery pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.