Well pump control
US3963374A · kind A · utility
Inventor
Key dates
| Filing date | Oct 24, 1972 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Oct 24, 1992 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/06
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump control comprising a control circuit having a timer which periodically closes the control circuit and hence an energizing electric circuit to an electric motor driving the pump, for predetermined intervals of time, and a float assembly having a vertically movable float surrounded by a vertical guide and shield having openings adjacent its bottom. Inlet and outlet lines extend upwardly through its bottom and establish an upward liquid level in the float chamber and provide support. A reduced flow drain line at the bottom of the float chamber drains liquid to establish a lower liquid level. A removable top closes the float chamber, which top carries a switch actuated by a float stem extending through it so that movement of the float in response to liquid levels closes the control circuit and thus the energizing circuit to the electric motor and opens the circuit to the timer when the float is in an upper position, and opens the control circuit to the energizing circuit to the motor and closes the circuit to the timer when the float is in a lower position. The float is located out of the path of fluid flowing into and through the float chamber and is shielded by the vertical gu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.