Walking beam pump having adjustable crank pin
US4681515A · kind A · utility
Inventor
Key dates
| Filing date | Jul 9, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Jul 9, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2181
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Variable stroke pump apparatus includes a photovoltaic array for providing electrical current to motors, one of which provides for the pumping action of a walking beam, one of which provides for movement of a control unit which varies the length of stroke of the pumping apparatus from a minimum of zero to a maximum, and one of which operates a counterweight for moving the counterweight in response to the pumping load. The apparatus includes mechanical elements which adjust the length of the stroke of the pumping arm, and a control system which controls the length of the pumping stroke in response to the output of the photovoltaic array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.