초록 ▼

A valve assembly for a pneumatic machine including a valve body having a first end, a second end, a central bore extending through the ends and a plurality of flow ports formed in the body; a valve spool movable through the bore along an axis in response to the flow of gas through the valve, to sele

A valve assembly for a pneumatic machine including a valve body having a first end, a second end, a central bore extending through the ends and a plurality of flow ports formed in the body; a valve spool movable through the bore along an axis in response to the flow of gas through the valve, to selectively open and seal the ports; an main inlet valve for moving the valve spool a distance along the axis; and a manually actuated means for overriding the main inlet valve.

대표청구항 ▼

A valve assembly for controlling the flow of gas to a pneumatic machine, the valve assembly comprising: a) a valve body having a first end, a second end, a bore extending through the ends and a plurality of flow ports formed therein, said plurality of flow ports including at least one fluid inlet po

A valve assembly for controlling the flow of gas to a pneumatic machine, the valve assembly comprising: a) a valve body having a first end, a second end, a bore extending through the ends and a plurality of flow ports formed therein, said plurality of flow ports including at least one fluid inlet port; b) a valve spool having a first valve spool end and a second valve spool end, said valve spool being movable through the bore along an axis to control the flow of gas through the valve, to selectively open and seal the ports; c) means for moving the valve spool in a first direction a distance along the axis towards the first end of the valve body, said means for moving the valve spool being movable in response to the flow of gas through the at least one inlet port, said means also including a first contact portion adapted to engage the second valve spool end to move the valve spool the required distance along the axis; and d) manually actuated means for overriding the means for moving the valve spool towards the first end of the valve body, said manually actuated means including a contact member having a contact end adapted to engage the first valve spool end when the valve spool has moved the required distance along the axis, wherein said contact member biases the valve spool member in a second direction upon engagement with the first valve spool member end.