Fluid sprayer system using modulated control valve and a positive displacement pump
US6883726B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2002 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Oct 4, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B9/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A fluid sprayer system using a modulated hydraulic control valve and a positive displacement pump to control the amount of fluid sprayed by the system. The modulated hydraulic control valve may be controlled using pulse width modulation and may be provided with a substantially constant source of hydraulic fluid. The pulse width modulated hydraulic control valve provides the hydraulic fluid to a hydraulic motor as a controlled flow. The controlled flow serves to control the hydraulic motor that controls a positive displacement pump. The position displacement pump is used to control the amount of fluid sprayed by the system. The control system changes the signal to the control valve so as to mitigate pressure changes otherwise caused by said positive displacement pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.