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Patent Searching and Data


Title:
FLUID SWITCHING VALVE
Document Type and Number:
Japanese Patent JP2000220765
Kind Code:
A
Abstract:

To automatically prevent a pressure drop of a hydraulic power source due to a hydraulic oil leak inevitably occurring at a switching process of a fluid switching valve by means of a switching action itself of the fluid switching valve without compensation such as driving of a hydraulic pump.

In a fluid switching valve 1 controlling switching of a channel by interlocking at a connectively arranged body 29 interposed between two valve elements 24 and 25 arranged facing each other and alternately opening and closing each seat parts 22 and 23 provided at both ends of a valve hole 19 by means of these valve elements 24 and 25, spools 30 and 31 switching the valve hole 19 to an open state or a blocked state while going in and out an interior of the valve hole 19 are provided at both ends of the connectively arranged body 29, and at least one of the spools 30 and 31 goes into the valve hole 19 to maintain the valve hole 19 in a blocked state during a switching process wherein both valve elements 24 and 25 open each seat parts 22 and 23.


Inventors:
SAKAI YOSHITAKE
Application Number:
JP2497699A
Publication Date:
August 08, 2000
Filing Date:
February 02, 1999
Export Citation:
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Assignee:
KAYABA INDUSTRY CO LTD
International Classes:
F16K31/122; F16K11/056; F16K11/07; (IPC1-7): F16K31/122; F16K11/056; F16K11/07
Domestic Patent References:
JPS59147104A1984-08-23
JPS59147103A1984-08-23
JPH10169800A1998-06-26
JPS51133824A1976-11-19
JPS4885972A1973-11-14
JPS5716064U1982-01-27
Attorney, Agent or Firm:
Amano Izumi