Disk harrow hydraulic wing balancing system

Motors: expansible chamber type – With motive fluid valve – Contracting chamber exhaust valve controlled by expanding...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

172311, 172316, 2804051, E15B 1306, A01B 7300

Patent

active

049150146

ABSTRACT:
A weight-balancing system for a farm implement, such as a disk harrow with foldable wings operated by wingfold cylinders, includes a selective control valve for controlling fluid communication to the head and rod ends of the wingfold cylinders. A pair of pressure-reducing/relieving valves permit individual adjustment of the pressures in both the head and rod ends to achieve the desired balance. In a preferred embodiment, a pilot-operated, two-position valve is connected between the rod ends and one of the pressure-responsive valves. The two-position valve is operated by pressure signals generated by a flow-responsive switching valve connected between the two-position valve and the selective control valve. The switching valve and the two-position valve cooperate to block the pressure-controlled outlet of the one pressure-responsive valve and the rod ends and to bypass return fluid flow from the rod ends to sump when the cylinders are being extended. Then, when cylinder motion stops and this return flow ends, the switching valve and the two-position valve are connected to the control pressure outlet of the one pressure-responsive valve to the rod ends to achieve the desired balance.

REFERENCES:
patent: 3824896 (1974-07-01), Tull, III
patent: 4379491 (1983-04-01), Riewerts et al.
patent: 4412758 (1983-11-01), Heitkamp et al.
patent: 4700784 (1987-10-01), Wiebe et al.
"Hydraulics, Theory and Applications", Werner Gotz for Robert Bosch GmbH, 1984, p. 235.
Sun, Reducing/Relieving Valves, (prior art but date is unknown) p. 7.02.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Disk harrow hydraulic wing balancing system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Disk harrow hydraulic wing balancing system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Disk harrow hydraulic wing balancing system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2292582

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.