Long stroke pump
US4145165A · kind A · utility
30Cited by
15References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1977 |
| Grant date | Mar 20, 1979 |
| Priority date | — |
| Expiry date | Mar 4, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/144
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A very high pressure pump apparatus which minimizes wear on the seals thereof and on valves connected thereto, by utilizing a very long stroke piston rod whose opposite ends are received in long cylinders. An electric motor which drives the rod, includes a rotor with a threaded aperture that receives a long threaded middle portion of the rod, so that as the rotor turns it advances the rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.