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 JP2004514093
Kind Code:
A
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.
Inventors:
Barber, Dennis Earl.
Application Number:
JP2002517985A
Publication Date:
May 13, 2004
Filing Date:
July 25, 2001
Export Citation:
Assignee:
HUSCO INTERNATIONAL, INC.
International Classes:
F15B11/05; F15B11/00; F15B11/16; F16D31/02; (IPC1-7): F15B11/16; F15B11/00; F15B11/05
Attorney, Agent or Firm:
Takao Kawasaki