Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1999-01-08
2000-07-11
Wu, Daniel J.
Communications: electrical
Condition responsive indicating system
Specific condition
340626, 340629, 340685, 37348, 37902, 73121, 73168, 747311, 747321, 116168, G08B 2100
Patent
active
060879459
ABSTRACT:
A pump failure alarm system which is provided in a hydraulic working machine comprising hydraulic pumps driven by a prime mover, delivery lines joining with one another into one common delivery line on the downstream side, check valves provided in the delivery lines upstream of a point where the delivery lines join with one another, a hydraulic cylinder driven by a hydraulic fluid introduced through the common delivery line, and a hydraulic reservoir. The pump failure alarm system comprises pressure sensors for detecting respective delivery pressures of the hydraulic pumps, bypass lines having one ends connected to the delivery lines at points upstream of the check valves and the other ends connected to the hydraulic reservoir, solenoid switching valves for opening and closing the associated bypass lines, an alarm display unit for giving an alarm in correspondence to each of the hydraulic pumps, and a controller.
REFERENCES:
patent: 4558593 (1985-12-01), Watanabe et al.
patent: 5631632 (1997-05-01), Nakashima et al.
patent: 5822891 (1998-10-01), Fujishima et al.
patent: 5823072 (1998-10-01), Legner
patent: 5887365 (1999-03-01), Fujishima et al.
Hitachi Construction Machinery Co. Ltd.
Wu Daniel J.
LandOfFree
Pump failure alarm system 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 Pump failure alarm system for hydraulic working machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pump failure alarm system for hydraulic working machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-546276