Title:
FLOW CONTROL VALVE
Document Type and Number:
Japanese Patent JP2016070453
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a flow control valve capable of preventing variation of flow rate in a direction opposition to an intended direction during flow rate controlling operation.SOLUTION: This invention relates to a flow control valve including a sliding shaft 30 and a sliding cylindrical surface 21a that are fitted to each other in an axial direction in a slidable manner and a moving mechanism for moving the sliding shaft 30 in an axial direction. A sliding surface of at least one of the sliding shaft 30 and the sliding cylindrical surface 21a is formed with one or a plurality of tapered grooves 33 of which specified regions may become a fluid passage. The tapered grooves 33 have a shape in which a flow passage resistance may be gradually decreased or increased along their length direction. A cavity 23 formed at the end part of the sliding shaft 30 to cover the sliding region is formed at a location except the fluid passage.SELECTED DRAWING: Figure 1
Inventors:
MAEDA MASATO
Application Number:
JP2014203063A
Publication Date:
May 09, 2016
Filing Date:
October 01, 2014
Export Citation:
Assignee:
FRONT CO LTD
International Classes:
F16K47/06; F16K3/32
Domestic Patent References:
JPH0351284U | 1991-05-17 | |||
JPS6415586A | 1989-01-19 | |||
JP2009002507A | 2009-01-08 | |||
JP2013190039A | 2013-09-26 | |||
JPS5427393A | 1979-03-01 | |||
JP2006138399A | 2006-06-01 | |||
JP2006153141A | 2006-06-15 | |||
JP2006153140A | 2006-06-15 | |||
JP2006046414A | 2006-02-16 |
Foreign References:
CN203051786U | 2013-07-10 |
Attorney, Agent or Firm:
Koichi Segawa