摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a double valve with a device for dynamic storage of a valve condition during circulation of inlet pressure, wherein valve units are resumed in the same condition when pressure is removed. <P>SOLUTION: The double valve for controlling a machine tool comprises the storage device. When the valve is in a normal non-operated condition (changed over from on-operation to off-operation or from off-operation into on-operation, e.g.) and intake air is circulated, the valve is kept in the non-operated condition (ready for operation). When the valve is in trouble (at an intermediate position, e.g.) and intake air is circulated, the valve is kept in trouble. Storage is carried out in a state in which a movable valve element is balanced when the valve is at a normal non-operated position, or in a state in which the movable valve element is unbalanced or latched when the valve is at an intermediate or trouble position. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |