Control circuit for heavy machinery

Details Control circuit for heavy machinery Control circuit for heavy machinery

1998-08-26

1999-12-28

Lopez, F. Daniel

Power plants

Pressure fluid source and motor

Having condition responsive control in a system of distinct...

60426, F15B 1116

Patent

active

060065214

ABSTRACT:
A control circuit for a piece of heavy machinery reduces a speed of one actuator, having a lower load, when that actuator and another actuator, having a higher load, are operated simultaneously. The control circuit includes a first control valve for supplying a first actuator with pressurized oil, discharged from a hydraulic pump; a second control valve for supplying a second actuator with pressurized oil, discharged from the hydraulic pump; operating units for actuating the first control valve and the second control valve; and a mode selector for providing a command to the second control valve in order to increase a speed of the first actuator compared with that of the second actuator when the first and second actuators are operated simultaneously. A variable adjustor can be provided to control the open area of a valve for enabling the stroke of the spool of the second control valve to regulated. The control circuit can include a sensor for detecting pilot pressure applied to the first control valve; a sensor for detecting pilot pressure applied to either end of the second control valve; a solenoid valve for passing pilot pressure to pilot ports at both ends of the second control valve; and a controller for actuating said solenoid valve responsive to signals from the two sensors.

REFERENCES:
patent: 5201177 (1993-04-01), Kim
patent: 5251444 (1993-10-01), Ochiai et al.
patent: 5520087 (1996-05-01), Takamura et al.

Affiliated with

Also associated with

Rating

Control circuit for heavy machinery does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control circuit for heavy machinery, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuit for heavy machinery will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2374646