| 摘要 |
The invention is a valve that releasably locks the valve in both the open position and the closed position. The valve has a valve body, a valve element, a handle, and a lock-out member that cooperates with the handle and the valve body to lock the handle and the valve element in either the open position or the closed position. The lock-out member has a collar that is rotatably mounted to the rim of the valve body. The collar has cogs that fit within notches in the rim and prevent the collar from rotating. The interlocking of the collar of the lock-out member with the valve body prohibits the rotation of the handle and the valve element. The lock-out member has a release member that cooperates with the handle to lift cogs out of the notches and cause the collar to disengage with the rim when the release member is activated. This allows the handle and the valve element to rotate between either the locked open position or the locked closed position.
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