Motors: expansible chamber type – With motive fluid valve – Self-acting valve
Reexamination Certificate
2006-06-20
2008-10-07
Lazo, Thomas E (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
Self-acting valve
C091S421000
Reexamination Certificate
active
07430955
ABSTRACT:
A hydraulic arrangement is provided for a tool locking device of a loader. The hydraulic arrangement comprises a hydraulic cylinder with first and second chambers, which cylinder has a first position for unlocking and a second position for locking, a first supply line hydraulically connected to the first chamber, a second supply line hydraulically connected to the second chamber and a control valve hydraulically connected to the first chamber. So as to prevent the faulty actuation of the hydraulic cylinder, it is proposed that the control valve has a first position and a second position, the control valve in the first position allowing hydraulic fluid to flow only in the direction of the first chamber and in the second position allowing hydraulic fluid to flow both to the first chamber and out of the first chamber and the control valve being controlled such that it assumes the first position when the hydraulic cylinder assumes its first position. In order to bring the hydraulic cylinder from the second position to the first position, the control valve always has to be moved to the second position first.
REFERENCES:
patent: 4850790 (1989-07-01), Johnson et al.
patent: 6098647 (2000-08-01), Haussler et al.
patent: 6431049 (2002-08-01), Berg et al.
patent: 7047866 (2006-05-01), Fatemi et al.
patent: 2004/0244575 (2004-12-01), Fatemi et al.
patent: 198 47 501 (2002-06-01), None
patent: 699 13 590 (2004-09-01), None
patent: 698 21 776 (2004-10-01), None
Deere & Company
Lazo Thomas E
LandOfFree
Hydraulic arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3990815