Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber
Patent
1983-02-24
1985-07-16
Cohen, Irwin C.
Motors: expansible chamber type
Fluid supply through diverse paths to single expansible chamber
91520, 91527, 91531, 414699, F15B 1116, F15B 1306
Patent
active
045288925
ABSTRACT:
A hydraulic circuit system of a construction machine having first and second hydraulic circuit, and a bypass circuit for connecting the first and second circuits together. The first circuit includes a first hydraulic pump and a first valve group having a plurality of directional control valves for controlling a flow of hydraulic fluid from the first pump, and the second circuit includes a second hydraulic pump and a second valve group having a plurality of directional control valves for controlling a flow of hydraulic fluid from the second pump. A plurality of actuators are driven by the hydraulic fluid supplied from the first and second pumps through the valves. The bypass circuit includes a bypass line for connecting the first travel valve in series with the second travel valve in a position downstream thereof through the selecting valve. The selecting valve has first and second positions and is normally in the first position to communicate the second travel valve with the other valves of the second group to supply the hydraulic fluid from the second travel valve to the other valves. When the first travel valve and at least one of the other valves of the second group are simultaneously actuated, the selecting valve is switched to the second position to bring the second travel valve into communication with the first travel valve through the bypass line thereby to supply the hydraulic fluid from the second travel valve to the first travel valve.
REFERENCES:
patent: 3922855 (1975-12-01), Bridwell et al.
patent: 4112821 (1978-09-01), Bianchetta
patent: 4142445 (1979-03-01), Lohbauer
patent: 4210061 (1980-07-01), Bianchetta
Mizushima Hiroshi
Okabe Nobuya
Cohen Irwin C.
Hitachi Construction Machinery Co. Ltd.
LandOfFree
Hydraulic circuit system for construction 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 Hydraulic circuit system for construction machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic circuit system for construction machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1730474