Linear motor powered pump unit
US5083905A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1989 |
| Grant date | Jan 28, 1992 |
| Priority date | — |
| Expiry date | Mar 8, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B17/042
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pump unit comprises a pump piston driven by a linear electric motor having induction and reaction members with closely adjacent flat surfaces. A reaction member can be sandwiched between two induction members. Co-operating induction and reaction members extend radially from a rod connected to the piston or to two axially spaced pistons or are grouped tangentially around it. The piston or pistons are driven synchronously and so that constant force is applied by way of a control system which includes a trajectory generator and a controller responsive to selected inputs relating to pump performance characteristics and feedback signals derived from measured current flow and piston position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.