Title:
COUNTERBALANCE VALVE
Document Type and Number:
Japanese Patent JPS59222680
Kind Code:
A
Abstract:
PURPOSE:To make stable control attainable without necessitating any seal, by making up a damper chamber outward a main check valve, while installing a pilot check valve in position between this damper chamber and a damper orifice interconnected to the former. CONSTITUTION:A damper chamber 15 is formed outward a main check valve R being seated in a main seat part 17, while a pilot check valve 19 is installed in position between the damper chamber 15 and a damper orifice 39 installed in a main check valve 6. With this constitution, in time of load holding, the main check valve R and the pilot check valve 19 work interdependently so that any leakage in the pressure can be thoroughly prevented from occurring, thus no seal is required. Therefore, a pilot ratio is able to grow large and stable control as much as for that becomes possible to be done.
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Inventors:
FURUTA TOSHIHIRO
Application Number:
JP9552583A
Publication Date:
December 14, 1984
Filing Date:
May 30, 1983
Export Citation:
Assignee:
KAYABA INDUSTRY CO LTD
International Classes:
F16K17/04; F16K39/02; (IPC1-7): F16K17/00
Attorney, Agent or Firm:
Nobuyuki Shima