Title:
UNLOADING VALVE
Document Type and Number:
Japanese Patent JPS5926679
Kind Code:
A
Abstract:
PURPOSE:To simplify construction and prevent a hunting from being generated at a pilot part due to pulsations of a primary pressure, by a method wherein a pilot part is constructed as a ball-operated system, and a ball provided at the pilot part securely close the operating pressure side. CONSTITUTION:In the condition wherein an unloading valve is not operated, the third spring 39 having one end supported by a plug 38 provided on the side of a main body 20 presses the second spool 33, and the second spring 35 having one end supported by the second spool 33 presses the first spool 29, whereby the ball 30 inserted into a spherical seat 27 of the first spool 29 is pressed against the first port 26, so that both the first port 26 and the second port 28 are closed, and simultaneously, the first spring 32 exerts a reaction force to the second spring 35.
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Inventors:
KOJIMA YUTAKA
Application Number:
JP13554582A
Publication Date:
February 10, 1984
Filing Date:
August 03, 1982
Export Citation:
Assignee:
DIESEL KIKI CO
International Classes:
F16K17/04; F15B1/02; F15B1/027; (IPC1-7): F15B11/00; F16K17/00
Attorney, Agent or Firm:
Toshihiko Watanabe