Electrical trigger for quick drop valve
US5251705A · kind A · utility
10Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1992 |
| Grant date | Oct 12, 1993 |
| Priority date | — |
| Expiry date | Mar 19, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/75
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A quick drop valve is electrically actuated by a switch located adjacent to the implement positioning control lever. The quick drop valve is a pilot operated spring biassed valve. When the electric switch is closed a solenoid valve is energized redirecting fluid between the pilot control lines. The quick drop valve is shifted short circuiting the flow of fluid from the lift side of the hydraulic cylinder to the reservoir and redirects it to the drop side of the hydraulic cylinder for quickly dropping the working implement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.