Title:
VALVE
Document Type and Number:
Japanese Patent JPS5715175
Kind Code:
A
Abstract:
PURPOSE:To obtain an exceedingly large pressure reducing action by opening and closing a number of small holes provided in a bottomed cylinder with a cylinder which is fitted the bottomed cylinder and is allowed to freely slide and by installing a throttle in one body on the lower stream side of a valve having a variable communicating channel area inside and outside both cylinders. CONSTITUTION:A number of small holes a are spirally provided on the bottom of a bottomed cylinder 1. The small holes a are designed to reduce their sizes as they approach an internal space A of the cylinder. A cylindrical member 2 which closes all the small holes a is fitted to the outside of the bottomed cylinder 1 so that the cylinder 2 may freely slide. A cylinder 6 installed on the lower stream side below the small holes a is provided with a pressure reducing unit 7 in the center. The pressure reducing unit 7 is made of a plate 15 forming an opening C for reducing size. The size of the opening C is desinged to reduce it size as it approaches the lower stream side. A transmission fluid from an upper tream side flow channel 8 is flow-controlled and pressure-reduced with two stages by changing the number of small holes a which communicate the inside and outside spacces A and B for both cylinders 1 and 2 by a sliding action of the cylinder 2.
Inventors:
SAWADA YOSHIHIRO
Application Number:
JP9019080A
Publication Date:
January 26, 1982
Filing Date:
July 01, 1980
Export Citation:
Assignee:
KUBOTA LTD
International Classes:
F16K3/26; F16K47/00; F16K47/04; (IPC1-7): F16K3/26; F16K47/00