Liquid spraying system controller including governor for reduced overshoot
US5711483A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1996 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Jan 24, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/085
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A spray controller includes a governor which limits the current applied to an electric motor that operates a spray system pump. The controller accepts pressure sensing and pressure setting signals and provides a pulse train output to drive the motor whenever the sensor signal indicates that the output pressure is less than the "set" pressure. The governor accepts the spray pressure setting signal and limits the width of the pulse train as a function of the desired pressure setting, thus limiting the motor's current and speed. In the preferred embodiment, the motor's speed is restricted at lower pressure settings, but is allowed to operate at maximum speed at higher pressure settings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.