Motors: expansible chamber type – With motive fluid valve – Inlet fluid supplemented by controlled fluid pressurized in...
Reexamination Certificate
2005-01-04
2005-01-04
Look, Edward K. (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
Inlet fluid supplemented by controlled fluid pressurized in...
C091S033000, C091S444000
Reexamination Certificate
active
06837140
ABSTRACT:
The present invention relates to a control system and method for a hydraulic working machine characterized by having a construction wherein a flow discharge control valve is disposed in a discharge-side pipe line of a main flow control valve, the amount of operation of an operating lever is converted to a pilot pressure by a remote controlled valve, the pilot pressure is then input to a controller and is calculated into a pressure change speed as operation speed, in a pressure change speed calculator, further, the operation speed is calculated into an electromagnetic valve current in an electromagnetic valve current calculator, then the electromagnetic proportional valve current is output to an electromagnetic proportional valve from a command unit, and the degree of opening of the discharge flow control valve is controlled with a secondary pressure in the electromagnetic proportional valve. According to this construction, it is possible to diminish impact and vibration which occur when there is performed a sudden operation, and also possible to improve the operability for braking and stopping an actuator.
REFERENCES:
patent: 4505111 (1985-03-01), Okamoto et al.
patent: 5513551 (1996-05-01), Morishita
patent: 5941155 (1999-08-01), Arai et al.
patent: 10-18356 (1998-01-01), None
patent: 10-147959 (1998-06-01), None
patent: 10-306468 (1998-11-01), None
patent: 11-13702 (1999-01-01), None
patent: 11-13703 (1999-01-01), None
patent: 11-30204 (1999-02-01), None
patent: 11-222384 (1999-08-01), None
patent: 11-311201 (1999-11-01), None
patent: 2000-18208 (2000-01-01), None
patent: 2000-18209 (2000-01-01), None
patent: 2000-240604 (2000-09-01), None
patent: 2001-99106 (2001-04-01), None
Fujii Kazuhiko
Imanishi Etsujiro
Oka Hidekazu
Sugano Naoki
Kobelco Construction Machinery Co., Ltd.
Leslie Michael
Look Edward K.
LandOfFree
Control system and method for hydraulic 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 Control system and method for hydraulic working machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control system and method for hydraulic working machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3415089