Pressure control system for a hydraulic lift and flotation system
US8401745B2 · kind B2 · utility
11Cited by
25References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2009 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | May 2, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D41/145
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A control system is provided to control the rate of pressure rise in a hydraulic lift and flotation system. When a hydraulic cylinder of the hydraulic lift and flotation system is to be adjusted, the pressure in the hydraulic lift and flotation system has to be increased to a predetermined pressure controlled by a relief valve before the hydraulic cylinder can be operated. The unload valve of the hydraulic lift and flotation system can be closed in a controlled or regulated manner in order to control the rate at which pressure rises in the hydraulic lift and flotation system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.