PROBLEM TO BE SOLVED: To provide a new fluid control system for a chair which requires the smallest number of hydraulic circuit control frameworks.SOLUTION: The fluid control system is provided with: chair actuators 22, 24 a reservoir 44 to hold fluid a pump 42 and a fluid flow circuit which supplies pressurized fluid to the chair actuators 22, 24, returns the fluid from the actuators 22, 24 to the reservoir 44, and connects the pump 42 so that it operates on the reservoir 44 and the actuators 22, 24. The fluid flow circuit has valves 48, 50 which operate selectively so that the return of the fluid from the actuators 22, 24 to the reservoir 44 is controlled, fluid pressure accumulators 74, 76 which are connected between the pump 42 and the chair actuators 22, 24, and between the chair actuators 22, 24 and the valves 48, 50, and flow control valves 54, 56 which are connected to a circuit between the chair actuators and the accumulators.COPYRIGHT: (C)2008,JPO&INPIT【課題】 最少の数の液圧回路制御構成で済む新規な椅子用流体制御システムを得る。【解決手段】椅子アクチュエータ22,24と、流体を保持するレザバー44と、ポンプ42と、加圧流体を椅子アクチュエータ22,24に供給すると共に、流体をアクチュエータ22,24からレザバー44に復帰させ、ポンプ42をレザバー44、及びアクチュエータ22,24に作動するように連結する流体流回路は、アクチュエータ22,24から、レザバー44への流体の復帰を制御するよう選択的に作動する弁48,50と、ポンプ42-椅子アクチュエータ22,24間、及び椅子アクチュエータ22,24-弁48,50との間に連結された流体圧力アキュームレータ74,76と、椅子アクチュエータとアキュームレータとの間の回路に連結された流量制御弁54,56とを具える。【選択図】 図2
