Title:
CONTROL VALVE
Document Type and Number:
Japanese Patent JP3464830
Kind Code:
B2
Abstract:
PURPOSE: To provide a control valve allowing a throttle to be formed easily at an oil passage for leading pressure oil on the lower reaches of an orifice to a pressure chamber.
CONSTITUTION: Pressure oil on the lower reaches of an orifice 9 is led to a pressure chamber 5 through an oil passage, and a spool 3 is moved by the action of differential pressure across the orifice 9 so as to make excess flow escape to a tank port. In a control valve of such constitution, a groove is formed at an insert hole 20 or a cylinder part 7a, overlapped with the insert hole 20, of an orifice member 7. Needless to say, grooves can be formed at both the insert hole 20 and cylinder part 7a. A throttle forming a part of the oil passage is constituted simultaneously with the insertion of the orifice member 7 into a connector 4.
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Inventors:
Tetsushi Hayashi
Toshihiro Yamada
Toshihiro Yamada
Application Number:
JP20465794A
Publication Date:
November 10, 2003
Filing Date:
August 05, 1994
Export Citation:
Assignee:
Kayaba Industry Co., Ltd.
International Classes:
B62D5/07; B62D5/087; F15B13/042; F16K11/07; F16K17/30; F16K31/122; G05D11/03; (IPC1-7): F16K17/30; B62D5/07
Domestic Patent References:
| JP328585A | ||||
| JP4138175U | ||||
| JP2146278U | ||||
| JP3122980U |
Attorney, Agent or Firm:
Nobuyuki Shima