Title:
COUNTERBALANCE VALVE
Document Type and Number:
Japanese Patent JPS59222679
Kind Code:
A
Abstract:
PURPOSE:To make the maintenance of a balancing condition ever so easy, by making up a flow control part in a large diametral part of a control spool, while setting up a poppet part inside the control spool. CONSTITUTION:A control spool S is made up of a small-sized part 17 and a large diametral part 18, and a flow control part 19 is formed in the large diametral part 18. And, a poppet part 22 is set up inside the control spool S, and a pilot piston T of the poppet part 22 is entered in a pilot passage 23. With this constitution, the control spool S comes to a stop at a position where force in which the control spool S and the pilot piston T solidly try to move toward the right as one body and another force in which the pilot piston T tries to move toward the left by dint of pilot pressure are both balanced. Therefore, even when the pilot pressure is constant, a flow rate is controllable so that the maintenance of a balancing condition is made to be simple enough.
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Inventors:
FURUTA TOSHIHIRO
Application Number:
JP9552483A
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