Title:
圧力補償型流量制御装置を備えた油圧制御バルブシステム
Document Type and Number:
Japanese Patent JP3916559
Kind Code:
B2
Abstract:
An assembly of valves controls hydraulic fluid flowing to several hydraulic actuators from a variable displacement pump that produces an output pressure equal to a control input pressure plus a predefined margin pressure. The control input pressure is a function of the greatest load pressure at the hydraulic actuators. Each valve has an associated pressure compensating valve which regulates the pressure differential across a metering orifice of each valve to a predefined level, usually the pump's margin pressure. A flow regulator is associated with at least one of the valves and reduces the output pressure from the pump to produce a reduced pressure that controls the associated pressure compensating valve. Operation of the flow regulator causes the pressure differential across a metering orifice of the associated valve to be less than the pump's margin pressure thus allowing adjustment of the fluid flow.
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Inventors:
Barber, Dennis Earl.
Application Number:
JP2002517985A
Publication Date:
May 16, 2007
Filing Date:
July 25, 2001
Export Citation:
Assignee:
HUSCO INTERNATIONAL, INC.
International Classes:
F15B11/00; F15B11/05; F15B11/16; F16D31/02
Domestic Patent References:
| JP4119604U | ||||
| JP10508932A | ||||
| JP5052204A | ||||
| JP10061603A | ||||
| JP6117406A | ||||
| JP2081902U | ||||
| JP9296803A | ||||
| JP11247802A | ||||
| JP5501600A |
Attorney, Agent or Firm:
Takao Kawasaki