Wellbore rig elevator systems
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United States of America Patent
Stats
-
Dec 4, 2007
Grant Date -
Mar 22, 2007
app pub date -
Sep 20, 2005
filing date -
Sep 20, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An elevator having, in at least certain aspects, an elevator body with two opposed ends and an elevator opening in the body, a door pivotably mounted to the body for selectively closing off the elevator opening, a lock bar on the elevator body, door latch apparatus on the door including a movable member to selectively and releasably hold the lockbar, and locking apparatus for selectively locking the door in position; and, in certain aspects, verification apparatus for maintaining the locking apparatus in position.
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