Hydraulic system having variable displacement pumps...

Details Hydraulic system having variable displacement pumps... Hydraulic system having variable displacement pumps...

F - Mech Eng,Light,Heat,Weapons

15

B

138/63

F15B 13/06 (2006.01) E02F 9/22 (2006.01) F15B 11/17 (2006.01)

Patent

CA 1148446

HYDRAULIC SYSTEM HAVING VARIABLE DISPLACEMENT PUMPS CONTROLLED BY POWER BEYOND FLOW Abstract of the Disclosure The displacement controllers of a first variable displace- ment pump supplying fluid for hoe and travel functions of an excavator and a second pump supplying fluid for the excavator house swing function are connected to shuttle valves which operate to couple to the controllers the lesser of the power beyond fluid pressures emanating from travel function and swing function control valves. A bypass circuit is arranged to couple power beyond flow from the swing function control valve to join the flow being outputed from the first pump when the pressure of the last-named power beyond flow exceeds the lesser of that emanating from the travel control functions. Lead compensators are provided to make the controllers more responsive to circuit demands and a power limiting valve is provided for automatically connecting pressure for destroking the pumps to relieve engine load when the engine speed falls to a predetermined minimum.

378456

Affiliated with

Also associated with

Rating

Hydraulic system having variable displacement pumps... 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 system having variable displacement pumps..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic system having variable displacement pumps... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-599860