Deep well pump
US4160623A · kind A · utility
0Cited by
23References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 26, 1976 |
| Grant date | Jul 10, 1979 |
| Priority date | — |
| Expiry date | May 26, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B53/162
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A deep well pump includes a cylinder having a foot valve and a valved piston which is movable over a given range in the cylinder. The cylinder is preferably formed of plastic, extends above ground and below the range of movement of the piston, and is of constant diameter over its length. The piston rod also extends above ground and is of variable length to vary the range of movement of the piston. The foot valve structure and piston structure are interchangeable and connected together during operation by a slackened cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.