Hydraulic control device of working machine

Details Hydraulic control device of working machine Hydraulic control device of working machine

2011-04-12

2011-04-12

Lopez, F. Daniel (Department: 3745)

Motors: expansible chamber type

Plural relatively movable or rigidly interconnected working...

Condition responsive means for modifying working member...

Reexamination Certificate

active

07921764

ABSTRACT:
A rotation prioritizing valve serving as a flow rate control valve of a hydraulic pilot type is provided on the meter-in side of an arm cylinder. At the time of a combined operation of arm pulling and rotation, the rotation prioritizing valve is activated by rotation pilot pressure so that a meter-in flow rate of the arm cylinder is throttled to prioritize rotation movement. On the premise of the above, a switching valve is provided in a pilot line of the rotation prioritizing valve and switched so as to release a throttling effect of the rotation prioritizing valve when boom lowering movement is added to the combined operation of arm pulling and rotation so that a rotation prioritizing function is cancelled.

REFERENCES:
patent: 5493950 (1996-02-01), Kim
patent: 5813311 (1998-09-01), Toyooka et al.
patent: 6430922 (2002-08-01), Tohji
patent: 7356991 (2008-04-01), Kim et al.
patent: 1 674 735 (2006-06-01), None
patent: 2 271 869 (1994-04-01), None
patent: 60-5928 (1985-01-01), None
patent: 2001-295804 (2001-10-01), None

Affiliated with

Also associated with

Rating

Hydraulic control device of working machine 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 control device of working machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control device of working machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2659575