Title:
圧力制御弁
Document Type and Number:
Japanese Patent JP5663084
Kind Code:
B2
Abstract:
A pressure control valve is provided, which protects a hydraulic system by feeding a high-pressure flow rate back to the side of a hydraulic tank when hydraulic pressure on a hydraulic pump side is increased over a predetermined pressure. The pressure control valve includes a sleeve having an inlet port receiving hydraulic fluid and a low-pressure path communicating with a hydraulic tank, a main poppet opening and closing the low-pressure path with respect to the inlet port, a main poppet spring elastically biasing the main poppet in an initial state by pressing the main poppet to maintain the low-pressure path closed with respect to the inlet port, a pilot poppet having an orifice flow path to control pressure in the pressure chamber while maintaining a sliding state against a valve seat when pressure that exceeds a predetermined pressure is generated in the pressure chamber to open an internal flow path of the valve seat, and a pilot poppet spring elastically biasing the pilot poppet in an initial state by pressing the pilot poppet to maintain the internal flow path of the valve seat closed.
More Like This:
| WO/1990/012232 | VALVE FOR PRESSURE MEDIUM |
Inventors:
キム・ジンウク
Application Number:
JP2013511086A
Publication Date:
February 04, 2015
Filing Date:
May 17, 2010
Export Citation:
Assignee:
ボルボ コンストラクション イクイップメント アーベー
International Classes:
F16K17/10; F16K17/04; F16K47/02
Attorney, Agent or Firm:
Seiji Kuzuwa
Previous Patent: 移動中のデータをセキュア化するためのシステムおよび方法
Next Patent: TERMINAL METAL FITTING OF SMALL DIAMETER WIRE ROPE
Next Patent: TERMINAL METAL FITTING OF SMALL DIAMETER WIRE ROPE