Power plants – Pressure fluid source and motor – Having condition responsive control in a system of distinct...
Patent
1997-09-30
1999-10-26
Lopez, F. Daniel
Power plants
Pressure fluid source and motor
Having condition responsive control in a system of distinct...
60429, F16D 3102
Patent
active
059707097
ABSTRACT:
Pilot change-over valves for operating actuators are connected in a center bypassing form and a cut-off valve is disposed downstream of each such pilot change-over valves. Commands which are in a proportional relation to each other are outputted from a controller to a pilot port of the cut-off valve and a pilot port of a pilot change-over valve for boom. Both valves are closed synchronously. Operation commands for both valves can be altered with a volume control for setting operation characteristics. Hydraulic pump oils for arm are joined together by a confluent valve. Consequently, highly responsive operations can be attained in operating the attachment of a hydraulic excavator. This is effective in the ground hardening work with a bucket, the work for removing mud from the machine body and the work for scattering soil.
REFERENCES:
patent: 3270059 (1966-08-01), Schurawski et al.
patent: 3922855 (1975-12-01), Bridwell et al.
patent: 5046309 (1991-09-01), Yoshino
patent: 5083428 (1992-01-01), Kubomoto et al.
patent: 5277027 (1994-01-01), Aoyagi et al.
Kabushiki Kaisha Kobe Seiko Sho
Lopez F. Daniel
LandOfFree
Hydraulic control circuit in a hydraulic excavator 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 circuit in a hydraulic excavator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control circuit in a hydraulic excavator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-750988