Power plants – Pressure fluid source and motor – Having condition responsive control in a system of...
Patent
1989-12-22
1992-04-07
Look, Edward K.
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of...
60486, 91532, F04B 2304
Patent
active
051016273
ABSTRACT:
An oil hydraulic circuit for a hydraulic shovel with which a composite operation can be performed readily and smoothly without special skill in operation of the hydraulic shovel. The oil hydraulic circuit comprises a first actuator which can operate with pressure oil from a predetermined one or both of a pair of hydraulic directional control valve sets, a second actuator which operates only with pressure oil from the other hydraulic directional control valve set, a proportional changing over device interposed intermediately in a pipe line communicating the other hydraulic directional control valve set with a first actuator for adjusting the maximum meter-in opening value to the first actuator in response to a magnitude of a signal received at a signal receiving portion of the proportional changing over device, and a controller for arbitrarily adjusting the signal to be supplied to the signal receiving portion of the proportional changing over device.
REFERENCES:
patent: 3704800 (1972-12-01), Redelman
patent: 3972185 (1976-08-01), Medina
patent: 3987704 (1976-10-01), Johnson
patent: 3994133 (1976-11-01), Pfeil et al.
patent: 3998053 (1976-12-01), Johnson
patent: 4070857 (1978-01-01), Wible
patent: 4112821 (1978-09-01), Bianchetta
patent: 4121501 (1978-10-01), Finley
patent: 4142445 (1979-03-01), Lohbauer
patent: 4210061 (1980-07-01), Bianchetta
patent: 4614475 (1986-09-01), Tamura et al.
patent: 4875337 (1989-10-01), Sugiyama et al.
Oelhydraulik & Pneumatik, vol. 30, #9, 1986, pp. 644-654, Mainz, DE; W. Klotzbuecher, "Auslegung von Hydrauliksystemen nach Energetischen Gesichtspunkten unter Beruecksichtigung des Lastkollektivs", p. 652, paragraph 3, FIG. 12.
Maschinenmarkt, vol. 91, No. 24, 1985, pp. 404, 405, Wuerzburg, DE; W. Roehrs et al.: "Den Leistungsgrad Optimieren mit Load-Sensing Ventilen", FIG. 1, middle column, paragraph 2.
Fujii Kazuhiko
Kouchi Sumio
Kubomoto Wataru
Shimokakiuchi Hiroshi
Kabushiki Kaisha Kobe Seiko Sho
Kapsalas George
Look Edward K.
LandOfFree
Adjustable flow-combining restrictor for hydraulic excavator dua does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable flow-combining restrictor for hydraulic excavator dua, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable flow-combining restrictor for hydraulic excavator dua will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1887063