Automatic pipe elevator
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United States of America Patent
Stats
-
Jun 11, 1985
Grant Date -
N/A
app pub date -
Aug 12, 1983
filing date -
Aug 12, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A self-locking and unlocking elevator for use with drill pipe is disclosed which, in a specific embodiment, includes a pair of jaws, each shaped to support a length of pipe; and central and upper linkage assemblies, for opening and closing the jaws about a section of drill pipe. The invention also includes a ratchet mechanism for locking the jaws open to receive or release a length of pipe, or to allow changing the clamping surfaces to accommodate different sizes of pipe; and for unlocking the jaws to allow closure over and clamping of a length of pipe.
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